/* ==========================================================================
   SISTEMA DE DISEÑO & VARIABLES CSS
   Estética: Minimalismo Técnico (Dark-first con Grises Carbón, Azul Eléctrico
   y Verde Terminal, con transición fluida a Modo Claro)
   ========================================================================== */

:root,
[data-theme="dark"] {
  --bg-primary: #090d14;
  --bg-secondary: #101722;
  --bg-tertiary: #162030;
  --bg-elevated: rgba(16, 23, 34, 0.78);
  --bg-terminal: #06090f;

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Acentos técnicos: Azul Eléctrico (Java) + Violeta Eléctrico (Kotlin) + Verde Terminal (C) + Naranja Cobre (Datos/IDEs) */
  --accent-amber: #fbbf24;
  --accent-amber-glow: rgba(251, 191, 36, 0.15);
  --accent-orange: #fb923c;
  --accent-orange-glow: rgba(251, 146, 60, 0.15);
  --accent-blue: #38bdf8;
  --accent-blue-strong: #0ea5e9;
  --accent-purple: #a78bfa;
  --accent-purple-strong: #8b5cf6;
  --accent-green: #10b981;
  --accent-green-bright: #34d399;

  --accent-blue-glow: rgba(56, 189, 248, 0.14);
  --accent-purple-glow: rgba(167, 139, 250, 0.15);
  --accent-green-glow: rgba(16, 185, 129, 0.14);

  --border-subtle: rgba(148, 163, 184, 0.14);
  --border-hover: rgba(56, 189, 248, 0.5);
  --border-hover-purple: rgba(167, 139, 250, 0.52);
  --border-hover-green: rgba(16, 185, 129, 0.5);
  --border-hover-orange: rgba(251, 146, 60, 0.52);

  --shadow-card: 0 16px 36px -10px rgba(0, 0, 0, 0.55);
  --spotlight-color: rgba(56, 189, 248, 0.08);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-elevated: rgba(255, 255, 255, 0.85);
  --bg-terminal: #0b111e;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --accent-amber: #d97706;
  --accent-amber-glow: rgba(217, 119, 6, 0.12);
  --accent-orange: #ea580c;
  --accent-orange-glow: rgba(234, 88, 12, 0.12);
  --accent-blue: #0284c7;
  --accent-blue-strong: #0369a1;
  --accent-purple: #7c3aed;
  --accent-purple-strong: #6d28d9;
  --accent-green: #059669;
  --accent-green-bright: #10b981;

  --accent-blue-glow: rgba(2, 132, 199, 0.1);
  --accent-purple-glow: rgba(124, 58, 237, 0.1);
  --accent-green-glow: rgba(5, 150, 105, 0.1);

  --border-subtle: rgba(15, 23, 42, 0.11);
  --border-hover: rgba(2, 132, 199, 0.45);
  --border-hover-purple: rgba(124, 58, 237, 0.45);
  --border-hover-green: rgba(5, 150, 105, 0.45);
  --border-hover-orange: rgba(234, 88, 12, 0.45);

  --shadow-card: 0 14px 30px -8px rgba(15, 23, 42, 0.08);
  --spotlight-color: rgba(2, 132, 199, 0.06);
}

/* ==========================================================================
   RESET, TIPOGRAFÍA & TRANSICIONES DE TEMA
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  overflow-y: scroll;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 1rem;
  overflow-x: clip;
  transition: background-color 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              color 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  -webkit-font-smoothing: antialiased;
}

main {
  display: flex;
  flex-direction: column;
  flex: 1 0 auto;
}

.mono {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-feature-settings: "liga" 1, "calt" 1;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

ul {
  list-style: none;
}

/* Retícula técnica y halo ambiental de fondo */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image: radial-gradient(var(--border-subtle) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 85% 65% at 50% 15%, #000 35%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 85% 65% at 50% 15%, #000 35%, transparent 100%);
  pointer-events: none;
}

.bg-glow {
  position: fixed;
  top: -180px;
  left: 50%;
  transform: translateX(-50%);
  width: 760px;
  height: 380px;
  background: radial-gradient(circle, var(--accent-blue-glow) 0%, var(--accent-green-glow) 45%, transparent 70%);
  filter: blur(65px);
  z-index: -1;
  pointer-events: none;
}

/* ==========================================================================
   LAYOUT & UTILIDADES
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding-inline: 1.5rem;
}

.section {
  padding-block: 5.5rem;
  scroll-margin-top: 1rem;
}

.text-gradient {
  background: linear-gradient(135deg, var(--accent-blue) 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-green {
  background: linear-gradient(135deg, var(--accent-green-bright) 0%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-green {
  color: var(--accent-green-bright) !important;
}

/* Superficie interactiva con seguimiento sutil de puntero */
.interactive-surface {
  position: relative;
  overflow: hidden;
}

.interactive-surface::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    420px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    var(--spotlight-color),
    transparent 45%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 0;
}

.interactive-surface:hover::before {
  opacity: 1;
}

.interactive-surface > * {
  position: relative;
  z-index: 1;
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.78rem 1.4rem;
  border-radius: 0.55rem;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue-strong), var(--accent-green));
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 4px 20px var(--accent-blue-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: 0 8px 25px var(--accent-blue-glow);
}

.btn-outline {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-outline:hover {
  border-color: var(--border-hover);
  background-color: var(--accent-blue-glow);
  transform: translateY(-2px);
}

/* ==========================================================================
   HEADER, NAVEGACIÓN & INTERRUPTOR FLUIDO DARK/LIGHT
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background-color: var(--bg-elevated);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color 0.35s ease, border-color 0.35s ease;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-bracket {
  color: var(--accent-blue);
}

.brand-slash {
  color: var(--accent-green-bright);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-index {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--accent-green-bright);
  margin-right: 0.25rem;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* Interruptor fluido tipo píldora (Dark / Light) */
.theme-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.28rem 0.6rem 0.28rem 0.32rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: border-color 0.25s ease, background-color 0.3s ease, box-shadow 0.25s ease;
}

.theme-switch:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

.switch-track {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 3.1rem;
  height: 1.65rem;
  padding: 0 0.32rem;
  border-radius: 999px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
}

.switch-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.25s ease, color 0.25s ease;
}

.switch-icon-moon {
  color: var(--accent-blue);
}

.switch-icon-sun {
  color: #f59e0b;
}

.switch-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 1.32rem;
  height: 1.32rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="light"] .switch-thumb {
  transform: translateX(1.42rem);
  background: linear-gradient(135deg, #f59e0b, var(--accent-blue));
}

[data-theme="dark"] .switch-icon-moon {
  color: #ffffff;
  transform: scale(1.05);
}

[data-theme="dark"] .switch-icon-sun {
  opacity: 0.55;
}

[data-theme="light"] .switch-icon-sun {
  color: #ffffff;
  transform: rotate(25deg) scale(1.05);
}

[data-theme="light"] .switch-icon-moon {
  opacity: 0.55;
}

.switch-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  min-width: 2.3rem;
  text-align: left;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.4rem;
  height: 2.4rem;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: 0.5rem;
  padding: 0.5rem;
  cursor: pointer;
}

.hamburger-line {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform 0.25s ease;
}

/* ==========================================================================
   1. HERO / PRESENTACIÓN
   ========================================================================== */

.hero {
  min-height: calc(100vh - 4.5rem);
  min-height: calc(100dvh - 4.5rem);
  display: flex;
  align-items: center;
  padding-top: 3.5rem;
  padding-bottom: 6rem;
}

.hero-grid {
  width: 100%;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.hero-content,
.hero-visual,
.project-card,
.stack-category {
  min-width: 0;
  max-width: 100%;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.38rem 0.9rem;
  border-radius: 999px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  font-size: 0.76rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 0 4px var(--accent-green-glow);
  animation: pulse-dot 2.4s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 3px var(--accent-green-glow); }
  50% { box-shadow: 0 0 0 7px rgba(16, 185, 129, 0.04); }
}

.hero-greeting {
  color: var(--accent-green-bright);
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.65rem;
}

.hero-title {
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.14;
  letter-spacing: -0.03em;
  font-weight: 700;
  margin-bottom: 1.35rem;
}

.hero-description {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 2rem;
  max-width: 62ch;
}

.hero-description strong {
  color: var(--text-primary);
  font-weight: 600;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0;
}

.hero-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-subtle);
}

.highlight-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.highlight-label {
  font-size: 0.73rem;
  color: var(--accent-blue);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.highlight-val {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Terminal Visual */
.terminal-window {
  background-color: var(--bg-terminal);
  border: 1px solid var(--border-subtle);
  border-radius: 0.85rem;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.terminal-window:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background-color: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background-color: #ef4444; }
.dot-yellow { background-color: #f59e0b; }
.dot-green { background-color: #10b981; }

.terminal-title {
  font-size: 0.74rem;
  color: #94a3b8;
}

.terminal-badge {
  font-size: 0.68rem;
  padding: 0.12rem 0.48rem;
  border-radius: 0.3rem;
  background-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.terminal-body {
  padding: 1.3rem;
  font-size: 0.82rem;
  line-height: 1.68;
  color: #e2e8f0;
  overflow-x: auto;
}

.code-line {
  margin-bottom: 0.5rem;
}

.code-block {
  margin: 0.5rem 0 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.c-prompt { color: #34d399; font-weight: 600; }
.c-cmd { color: #38bdf8; }
.c-key { color: #7dd3fc; }
.c-str { color: #6ee7b7; }
.c-flag { color: #fcd34d; }

.cursor {
  display: inline-block;
  color: #34d399;
  font-weight: 700;
  animation: blink 1.1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ==========================================================================
   ENCABEZADOS DE SECCIÓN
   ========================================================================== */

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 3rem;
  margin-bottom: 2.75rem;
}

.section-header > div:first-child,
.section-header-info {
  flex: 1 1 auto;
  max-width: 33rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--accent-green-bright);
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
}

.section-title {
  font-size: clamp(1.65rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--text-secondary);
  max-width: 50ch;
  font-size: 0.96rem;
  line-height: 1.6;
}

/* ==========================================================================
   2. PROYECTOS (#projects - TARJETAS PROFESIONALES + FILTRADO SIN RECARGA)
   ========================================================================== */

.project-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  flex-shrink: 0;
  gap: 0.55rem;
  margin-left: auto;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.35rem;
  gap: 0.5rem;
  padding: 0.48rem 0.95rem;
  border-radius: 0.55rem;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all 0.22s ease;
}

/* Sombreado y borde por categoría al pasar el ratón (Hover) */
.filter-btn[data-filter="all"]:hover {
  color: #ffffff;
  border-color: var(--accent-green-bright);
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.35), rgba(16, 185, 129, 0.35));
  box-shadow: 0 4px 18px var(--accent-blue-glow);
  transform: translateY(-1px);
}

.filter-btn[data-filter="backend"]:hover {
  color: var(--accent-blue);
  border-color: var(--border-hover);
  box-shadow: 0 0 16px -4px rgba(56, 189, 248, 0.25);
  transform: translateY(-1px);
}

.filter-btn[data-filter="mobile"]:hover {
  color: var(--accent-purple);
  border-color: var(--border-hover-purple);
  box-shadow: 0 0 16px -4px rgba(167, 139, 250, 0.26);
  transform: translateY(-1px);
}

.filter-btn[data-filter="systems"]:hover {
  color: var(--accent-green-bright);
  border-color: var(--border-hover-green);
  box-shadow: 0 0 16px -4px rgba(16, 185, 129, 0.25);
  transform: translateY(-1px);
}

/* Estado activo con sombreado igual al color del lenguaje de las cards */
.filter-btn[data-filter="all"].active {
  background: linear-gradient(135deg, var(--accent-blue-strong), var(--accent-green));
  color: #ffffff;
  font-weight: 600;
  border-color: transparent;
  box-shadow: 0 4px 20px var(--accent-blue-glow);
}

.filter-btn[data-filter="backend"].active {
  background-color: var(--accent-blue-glow);
  color: var(--accent-blue);
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px var(--accent-blue-glow), 0 0 18px -4px rgba(56, 189, 248, 0.28);
}

.filter-btn[data-filter="mobile"].active {
  background-color: var(--accent-purple-glow);
  color: var(--accent-purple);
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 2px var(--accent-purple-glow), 0 0 18px -4px rgba(167, 139, 250, 0.28);
}

.filter-btn[data-filter="systems"].active {
  background-color: var(--accent-green-glow);
  color: var(--accent-green-bright);
  border-color: var(--accent-green-bright);
  box-shadow: 0 0 0 2px var(--accent-green-glow), 0 0 18px -4px rgba(16, 185, 129, 0.28);
}

.filter-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.35rem;
  height: 1.35rem;
  padding: 0 0.35rem;
  font-size: 0.7rem;
  border-radius: 999px;
  background-color: var(--bg-primary);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  transition: all 0.2s ease;
}

.filter-btn.active .filter-count {
  color: #090d14;
  border-color: transparent;
  font-weight: 700;
}

.filter-btn[data-filter="all"].active .filter-count {
  background-color: rgba(9, 13, 20, 0.28);
  color: #ffffff;
}

.filter-btn[data-filter="backend"].active .filter-count {
  background-color: var(--accent-blue);
}

.filter-btn[data-filter="mobile"].active .filter-count {
  background-color: var(--accent-purple);
}

.filter-btn[data-filter="systems"].active .filter-count {
  background-color: var(--accent-green-bright);
}

.projects-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  grid-auto-rows: 20.25rem;
  min-height: 20.25rem;
  gap: 1.35rem;
  align-items: stretch;
  align-content: start;
  transition: height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 20.25rem;
  margin: 0;
  background-color: var(--bg-secondary);
  border: 1px solid rgba(56, 189, 248, 0.26);
  border-radius: 0.9rem;
  padding: 1.5rem 1.55rem;
  cursor: pointer;
  user-select: none;
  outline: none;
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.28s ease,
              box-shadow 0.28s ease,
              opacity 0.28s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card-kotlin {
  border-color: rgba(167, 139, 250, 0.28);
}

.project-card-systems {
  border-color: rgba(16, 185, 129, 0.25);
}

/* Línea superior de color por lenguaje (Java = Azul, Kotlin = Violeta, C = Verde) */
.project-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 1.25rem;
  right: 1.25rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, var(--accent-blue), transparent);
  opacity: 0.55;
  transition: opacity 0.28s ease;
}

.project-card-kotlin::after {
  background: linear-gradient(90deg, transparent, var(--accent-purple), transparent);
}

.project-card-systems::after {
  background: linear-gradient(90deg, transparent, var(--accent-green-bright), transparent);
}

.project-card:hover,
.project-card:focus-visible {
  transform: translateY(-5px);
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-card), 0 0 24px -6px rgba(56, 189, 248, 0.24);
}

.project-card-kotlin:hover,
.project-card-kotlin:focus-visible {
  border-color: var(--accent-purple);
  box-shadow: var(--shadow-card), 0 0 24px -6px rgba(167, 139, 250, 0.26);
}

.project-card-systems:hover,
.project-card-systems:focus-visible {
  border-color: var(--accent-green-bright);
  box-shadow: var(--shadow-card), 0 0 24px -6px rgba(16, 185, 129, 0.24);
}

.project-card:active {
  transform: translateY(-2px) scale(0.992);
}

.project-card:hover::after,
.project-card:focus-visible::after {
  opacity: 1;
}

.project-card.hidden {
  position: absolute;
  top: 0;
  left: 0;
  width: min(100%, 350px);
  height: 20.25rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: scale(0.95);
  z-index: -1;
}

.project-card.filter-enter {
  animation: cardFilterIn 0.32s cubic-bezier(0.4, 0, 0.2, 1) both;
}

@keyframes cardFilterIn {
  from {
    opacity: 0;
    transform: scale(0.97);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.project-card-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.05rem;
}

.project-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 0.55rem;
  background-color: var(--accent-blue-glow);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.2);
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.project-card:hover .project-icon {
  transform: scale(1.06);
}

.project-icon-purple {
  background-color: var(--accent-purple-glow);
  color: var(--accent-purple);
  border-color: rgba(167, 139, 250, 0.28);
}

.project-icon-green {
  background-color: var(--accent-green-glow);
  color: var(--accent-green-bright);
  border-color: rgba(16, 185, 129, 0.25);
}

.project-type {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-blue);
}

.project-type-purple {
  color: var(--accent-purple);
}

.project-type-green {
  color: var(--accent-green-bright);
}

/* Etiqueta distintiva derecha en la cabecera de la tarjeta (ej. Kotlin Expert) */
.project-card-badge {
  margin-left: auto;
  font-size: 0.66rem;
  font-weight: 600;
  padding: 0.16rem 0.52rem;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.project-card-badge-purple {
  background-color: rgba(167, 139, 250, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(167, 139, 250, 0.36);
}

.project-card:hover .project-card-badge-purple {
  background-color: rgba(167, 139, 250, 0.24);
  box-shadow: 0 0 12px -2px rgba(167, 139, 250, 0.38);
}

.project-card-badge-green {
  background-color: rgba(16, 185, 129, 0.14);
  color: var(--accent-green-bright);
  border: 1px solid rgba(16, 185, 129, 0.34);
}

.project-card:hover .project-card-badge-green {
  background-color: rgba(16, 185, 129, 0.22);
  box-shadow: 0 0 12px -2px rgba(16, 185, 129, 0.35);
}

/* Indicador de flecha discreto en la esquina superior derecha */
.project-card-arrow {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 0.45rem;
  color: var(--text-muted);
  background-color: transparent;
  border: 1px solid transparent;
  transition: transform 0.26s cubic-bezier(0.22, 1, 0.36, 1),
              color 0.24s ease,
              background-color 0.24s ease,
              border-color 0.24s ease;
}

.project-card:hover .project-card-arrow,
.project-card:focus-visible .project-card-arrow {
  color: var(--accent-blue);
  background-color: var(--accent-blue-glow);
  border-color: rgba(56, 189, 248, 0.28);
  transform: translateX(3px);
}

.project-card-kotlin:hover .project-card-arrow,
.project-card-kotlin:focus-visible .project-card-arrow {
  color: var(--accent-purple);
  background-color: var(--accent-purple-glow);
  border-color: rgba(167, 139, 250, 0.32);
}

.project-card-systems:hover .project-card-arrow,
.project-card-systems:focus-visible .project-card-arrow {
  color: var(--accent-green-bright);
  background-color: var(--accent-green-glow);
  border-color: rgba(16, 185, 129, 0.3);
}

.project-title {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.32;
  margin-bottom: 0.55rem;
  transition: color 0.2s ease;
}

.project-card:hover .project-title {
  color: var(--accent-blue);
}

.project-card-kotlin:hover .project-title {
  color: var(--accent-purple);
}

.project-card-systems:hover .project-title {
  color: var(--accent-green-bright);
}

/* Resumen corto en la tarjeta (completo sin recorte de puntos suspensivos) */
.project-desc-short {
  color: var(--text-secondary);
  font-size: 0.86rem;
  line-height: 1.58;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
  margin-bottom: 0;
}

.project-tags li {
  font-size: 0.74rem;
  font-weight: 500;
  padding: 0.24rem 0.65rem;
  border-radius: 0.4rem;
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.project-card:hover .project-tags li {
  border-color: rgba(56, 189, 248, 0.28);
  color: var(--text-primary);
}

.project-card-kotlin:hover .project-tags li {
  border-color: rgba(167, 139, 250, 0.34);
}

.project-card-systems:hover .project-tags li {
  border-color: rgba(16, 185, 129, 0.3);
}

/* ==========================================================================
   MODAL FLOTANTE DE VISTA DETALLADA Y ARQUITECTURA DE PROYECTO
   ========================================================================== */

.project-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background-color: rgba(6, 9, 15, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.28s cubic-bezier(0.22, 1, 0.36, 1),
              visibility 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

.project-modal-backdrop.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.project-modal-dialog {
  width: 100%;
  max-width: 760px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-hover);
  border-radius: 1rem;
  box-shadow: 0 28px 65px -12px rgba(0, 0, 0, 0.72);
  overflow: hidden;
  transform: translateY(20px) scale(0.96);
  transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.25s ease;
}

.project-modal-dialog.theme-kotlin {
  border-color: var(--border-hover-purple);
}

.project-modal-dialog.theme-systems {
  border-color: var(--border-hover-green);
}

.project-modal-backdrop.is-open .project-modal-dialog {
  transform: translateY(0) scale(1);
}

.project-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1.4rem;
  background-color: var(--bg-terminal);
  border-bottom: 1px solid var(--border-subtle);
}

.project-modal-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.project-modal-category {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-blue);
}

.project-modal-dialog.theme-kotlin .project-modal-category {
  color: var(--accent-purple);
}

.project-modal-dialog.theme-systems .project-modal-category {
  color: var(--accent-green-bright);
}

.project-modal-status {
  font-size: 0.68rem;
  padding: 0.16rem 0.55rem;
  border-radius: 999px;
  background-color: var(--accent-blue-glow);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.32);
}

.project-modal-dialog.theme-kotlin .project-modal-status {
  background-color: rgba(167, 139, 250, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(167, 139, 250, 0.34);
}

.project-modal-dialog.theme-systems .project-modal-status {
  background-color: rgba(16, 185, 129, 0.14);
  color: var(--accent-green-bright);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.project-modal-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 0.45rem;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background-color: transparent;
  color: #94a3b8;
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  transition: all 0.2s ease;
}

.project-modal-close:hover {
  color: #ffffff;
  border-color: #ef4444;
  background-color: rgba(239, 68, 68, 0.2);
}

.project-modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(56, 189, 248, 0.34) var(--bg-terminal);
}

.project-modal-dialog.theme-kotlin .project-modal-body {
  scrollbar-color: rgba(167, 139, 250, 0.34) var(--bg-terminal);
}

.project-modal-dialog.theme-systems .project-modal-body {
  scrollbar-color: rgba(16, 185, 129, 0.34) var(--bg-terminal);
}

.project-modal-body::-webkit-scrollbar {
  width: 7px;
}

.project-modal-body::-webkit-scrollbar-track {
  background-color: var(--bg-terminal);
  border-left: 1px solid rgba(148, 163, 184, 0.08);
}

.project-modal-body::-webkit-scrollbar-thumb {
  background-color: rgba(56, 189, 248, 0.28);
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.18);
}

.project-modal-body::-webkit-scrollbar-thumb:hover {
  background-color: rgba(56, 189, 248, 0.5);
}

.project-modal-dialog.theme-kotlin .project-modal-body::-webkit-scrollbar-thumb {
  background-color: rgba(167, 139, 250, 0.28);
  border-color: rgba(167, 139, 250, 0.18);
}

.project-modal-dialog.theme-kotlin .project-modal-body::-webkit-scrollbar-thumb:hover {
  background-color: rgba(167, 139, 250, 0.5);
}

.project-modal-dialog.theme-systems .project-modal-body::-webkit-scrollbar-thumb {
  background-color: rgba(16, 185, 129, 0.28);
  border-color: rgba(16, 185, 129, 0.18);
}

.project-modal-dialog.theme-systems .project-modal-body::-webkit-scrollbar-thumb:hover {
  background-color: rgba(16, 185, 129, 0.5);
}

/* Previsualización Multimedia / Diagrama dentro del Modal */
.project-media-preview {
  margin-bottom: 1.4rem;
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-terminal);
  box-shadow: 0 10px 28px -8px rgba(0, 0, 0, 0.5);
}

.media-window-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.52rem 0.9rem;
  background-color: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
}

.media-dots {
  display: flex;
  gap: 5px;
}

.media-window-title {
  font-size: 0.72rem;
  color: #94a3b8;
}

.media-fps-badge {
  font-size: 0.66rem;
  padding: 0.12rem 0.48rem;
  border-radius: 0.3rem;
  background-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.media-viewport {
  position: relative;
  overflow: hidden;
  line-height: 0;
}

.project-preview-img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 8.5;
  object-fit: cover;
}

.project-modal-title {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.project-modal-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.68;
  margin-bottom: 1.35rem;
}

.project-modal-desc strong {
  color: var(--text-primary);
  font-weight: 600;
}

.project-modal-desc code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--accent-blue);
}

.project-modal-features {
  list-style: none;
  margin-top: 0.95rem;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.project-modal-features li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.9rem;
  line-height: 1.58;
  color: var(--text-secondary);
}

.project-modal-features li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-blue);
  font-weight: 700;
}

.project-modal-dialog.theme-kotlin .project-modal-desc code,
.project-modal-dialog.theme-kotlin .project-modal-features li::before {
  color: var(--accent-purple);
}

.project-modal-dialog.theme-systems .project-modal-desc code,
.project-modal-dialog.theme-systems .project-modal-features li::before {
  color: var(--accent-green-bright);
}

.project-modal-subtitle {
  font-size: 0.72rem;
  color: var(--accent-blue);
  letter-spacing: 0.06em;
  margin-bottom: 0.65rem;
}

.project-modal-dialog.theme-kotlin .project-modal-subtitle {
  color: var(--accent-purple);
}

.project-modal-dialog.theme-systems .project-modal-subtitle {
  color: var(--accent-green-bright);
}

.modal-project-tags {
  margin-bottom: 0;
}

.modal-project-tags li {
  font-size: 0.75rem;
  padding: 0.28rem 0.7rem;
}

.project-modal-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
  padding: 1rem 1.5rem;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
}

/* ==========================================================================
   3. HABILIDADES / TECH STACK (INDICADORES INTERACTIVOS Y MICRO-INTERACCIONES)
   ========================================================================== */

/* Barra de filtro interactivo de dominios homologada con la sección de Proyectos */
.stack-domain-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  flex-shrink: 0;
  gap: 0.55rem;
  margin-left: auto;
}

.domain-chip,
.stack-domain-bar .filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.35rem;
  gap: 0.5rem;
  padding: 0.48rem 0.95rem;
  border-radius: 0.55rem;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all 0.22s ease;
}

/* Hover por dominio técnico homologado con la sección de Proyectos */
.domain-chip[data-domain="all"]:hover {
  color: #ffffff;
  border-color: var(--accent-green-bright);
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.35), rgba(16, 185, 129, 0.35));
  box-shadow: 0 4px 18px var(--accent-blue-glow);
  transform: translateY(-1px);
}

.domain-chip[data-domain="backend"]:hover {
  color: var(--accent-blue);
  border-color: var(--border-hover);
  box-shadow: 0 0 16px -4px rgba(56, 189, 248, 0.25);
  transform: translateY(-1px);
}

.domain-chip[data-domain="mobile"]:hover {
  color: var(--accent-purple);
  border-color: var(--border-hover-purple);
  box-shadow: 0 0 16px -4px rgba(167, 139, 250, 0.26);
  transform: translateY(-1px);
}

.domain-chip[data-domain="systems"]:hover {
  color: var(--accent-green-bright);
  border-color: var(--border-hover-green);
  box-shadow: 0 0 16px -4px rgba(16, 185, 129, 0.25);
  transform: translateY(-1px);
}

.domain-chip[data-domain="tooling"]:hover {
  color: var(--accent-orange);
  border-color: var(--border-hover-orange);
  box-shadow: 0 0 16px -4px rgba(251, 146, 60, 0.26);
  transform: translateY(-1px);
}

/* Estados activos con pastilla degradada corporativa y colores de cada ecosistema */
.domain-chip[data-domain="all"].active {
  background: linear-gradient(135deg, var(--accent-blue-strong), var(--accent-green));
  color: #ffffff;
  font-weight: 600;
  border-color: transparent;
  box-shadow: 0 4px 20px var(--accent-blue-glow);
}

.domain-chip[data-domain="backend"].active {
  background-color: var(--accent-blue-glow);
  color: var(--accent-blue);
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px var(--accent-blue-glow), 0 0 18px -4px rgba(56, 189, 248, 0.28);
}

.domain-chip[data-domain="mobile"].active {
  background-color: var(--accent-purple-glow);
  color: var(--accent-purple);
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 2px var(--accent-purple-glow), 0 0 18px -4px rgba(167, 139, 250, 0.28);
}

.domain-chip[data-domain="systems"].active {
  background-color: var(--accent-green-glow);
  color: var(--accent-green-bright);
  border-color: var(--accent-green-bright);
  box-shadow: 0 0 0 2px var(--accent-green-glow), 0 0 18px -4px rgba(16, 185, 129, 0.28);
}

.domain-chip[data-domain="tooling"].active {
  background-color: var(--accent-orange-glow);
  color: var(--accent-orange);
  border-color: var(--accent-orange);
  box-shadow: 0 0 0 2px var(--accent-orange-glow), 0 0 18px -4px rgba(251, 146, 60, 0.28);
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
  align-items: stretch;
}

.stack-category {
  display: flex;
  flex-direction: column;
  height: 100%;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 0.9rem;
  padding: 1.85rem;
}

.stack-category-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1.35rem;
  margin-bottom: 1.35rem;
  border-bottom: 1px solid var(--border-subtle);
}

.stack-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.85rem;
  height: 2.85rem;
  border-radius: 0.65rem;
  background-color: var(--accent-blue-glow);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.2);
  flex-shrink: 0;
}

.stack-icon-green {
  background-color: var(--accent-green-glow);
  color: var(--accent-green-bright);
  border-color: rgba(16, 185, 129, 0.24);
}

.stack-icon-orange {
  background-color: var(--accent-orange-glow);
  color: var(--accent-orange);
  border-color: rgba(251, 146, 60, 0.28);
}

.stack-category-title {
  font-size: 1.15rem;
  font-weight: 600;
}

.stack-category-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.skill-list {
  display: grid;
  grid-template-rows: repeat(3, 1fr);
  gap: 1.15rem;
  flex: 1;
}

.skill-item {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 9.85rem;
  padding: 1.15rem 1.25rem;
  border-radius: 0.75rem;
  background-color: var(--bg-primary);
  border: 1px solid rgba(56, 189, 248, 0.2);
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.25s ease,
              box-shadow 0.25s ease,
              opacity 0.25s ease;
  outline: none;
}

.skill-item-purple {
  border-color: rgba(167, 139, 250, 0.22);
}

.skill-item-green {
  border-color: rgba(16, 185, 129, 0.2);
}

.skill-item-orange {
  border-color: rgba(251, 146, 60, 0.24);
}

.skill-item:hover,
.skill-item:focus-visible {
  transform: translateY(-3px) translateX(2px);
  border-color: var(--accent-blue);
  box-shadow: 0 10px 24px -10px rgba(0, 0, 0, 0.5), 0 0 18px -6px rgba(56, 189, 248, 0.22);
}

.skill-item-purple:hover,
.skill-item-purple:focus-visible {
  border-color: var(--accent-purple);
  box-shadow: 0 10px 24px -10px rgba(0, 0, 0, 0.5), 0 0 18px -6px rgba(167, 139, 250, 0.24);
}

.skill-item-green:hover,
.skill-item-green:focus-visible {
  border-color: var(--accent-green-bright);
  box-shadow: 0 10px 24px -10px rgba(0, 0, 0, 0.5), 0 0 18px -6px rgba(16, 185, 129, 0.22);
}

.skill-item-orange:hover,
.skill-item-orange:focus-visible {
  border-color: var(--accent-orange);
  box-shadow: 0 10px 24px -10px rgba(0, 0, 0, 0.5), 0 0 18px -6px rgba(251, 146, 60, 0.25);
}

/* Estados al filtrar por dominio en #stack */
.skill-item.dimmed {
  opacity: 0.3;
  transform: none;
}

.skill-item.highlighted {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 1px var(--accent-blue-glow), 0 8px 20px -6px rgba(56, 189, 248, 0.28);
}

.skill-item-purple.highlighted {
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 1px var(--accent-purple-glow), 0 8px 20px -6px rgba(167, 139, 250, 0.3);
}

.skill-item-green.highlighted {
  border-color: var(--accent-green-bright);
  box-shadow: 0 0 0 1px var(--accent-green-glow), 0 8px 20px -6px rgba(16, 185, 129, 0.28);
}

.skill-item-orange.highlighted {
  border-color: var(--accent-orange);
  box-shadow: 0 0 0 1px var(--accent-orange-glow), 0 8px 20px -6px rgba(251, 146, 60, 0.3);
}

/* Cambio dinámico de color según el filtro activo (ej. Bases de Datos -> Azul en Backend / Violeta en Mobile) */
.skill-item.active-theme-blue,
.skill-item.active-theme-blue:hover,
.skill-item.active-theme-blue.highlighted {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 1px var(--accent-blue-glow), 0 8px 20px -6px rgba(56, 189, 248, 0.28);
}

.skill-item.active-theme-purple,
.skill-item.active-theme-purple:hover,
.skill-item.active-theme-purple.highlighted {
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 1px var(--accent-purple-glow), 0 8px 20px -6px rgba(167, 139, 250, 0.3);
}

.skill-item.active-theme-green,
.skill-item.active-theme-green:hover,
.skill-item.active-theme-green.highlighted {
  border-color: var(--accent-green-bright);
  box-shadow: 0 0 0 1px var(--accent-green-glow), 0 8px 20px -6px rgba(16, 185, 129, 0.28);
}

.skill-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.4rem;
}

.skill-title-group {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.skill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

.dot-blue {
  background-color: var(--accent-blue);
}

.dot-purple {
  background-color: var(--accent-purple);
}

.dot-green {
  background-color: var(--accent-green-bright);
}

.dot-orange {
  background-color: var(--accent-orange);
}

.skill-item.active-theme-blue .skill-dot {
  background-color: var(--accent-blue);
  box-shadow: 0 0 8px var(--accent-blue);
}

.skill-item.active-theme-purple .skill-dot {
  background-color: var(--accent-purple);
  box-shadow: 0 0 8px var(--accent-purple);
}

.skill-item.active-theme-green .skill-dot {
  background-color: var(--accent-green-bright);
  box-shadow: 0 0 8px var(--accent-green-bright);
}

.skill-item:hover .dot-blue {
  transform: scale(1.3);
  box-shadow: 0 0 8px var(--accent-blue);
}

.skill-item:hover .dot-purple {
  transform: scale(1.3);
  box-shadow: 0 0 8px var(--accent-purple);
}

.skill-item:hover .dot-green {
  transform: scale(1.3);
  box-shadow: 0 0 8px var(--accent-green-bright);
}

.skill-item:hover .dot-orange {
  transform: scale(1.3);
  box-shadow: 0 0 8px var(--accent-orange);
}

.skill-name {
  font-weight: 600;
  font-size: 0.96rem;
}

.skill-badge {
  font-size: 0.72rem;
  padding: 0.16rem 0.58rem;
  border-radius: 0.35rem;
  background-color: var(--accent-blue-glow);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.24);
}

.badge-purple {
  background-color: var(--accent-purple-glow);
  color: var(--accent-purple);
  border-color: rgba(167, 139, 250, 0.28);
}

.badge-green {
  background-color: var(--accent-green-glow);
  color: var(--accent-green-bright);
  border-color: rgba(16, 185, 129, 0.25);
}

.skill-detail {
  font-size: 0.86rem;
  line-height: 1.56;
  color: var(--text-secondary);
  margin-bottom: 0.9rem;
  flex-grow: 1;
}

/* Pastillas tecnológicas (tags) dentro de cada categoría de habilidad */
.skill-micro-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
}

.micro-pill {
  font-size: 0.74rem;
  font-weight: 500;
  padding: 0.24rem 0.65rem;
  border-radius: 0.4rem;
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid rgba(56, 189, 248, 0.2);
  transition: all 0.2s ease;
}

.skill-item-purple .micro-pill {
  border-color: rgba(167, 139, 250, 0.22);
}

.skill-item-green .micro-pill {
  border-color: rgba(16, 185, 129, 0.22);
}

.skill-item-orange .micro-pill {
  border-color: rgba(251, 146, 60, 0.24);
}

.skill-item.active-theme-blue .micro-pill {
  border-color: rgba(56, 189, 248, 0.35);
  color: var(--text-primary);
}

.skill-item.active-theme-purple .micro-pill {
  border-color: rgba(167, 139, 250, 0.38);
  color: var(--text-primary);
}

.skill-item.active-theme-green .micro-pill {
  border-color: rgba(16, 185, 129, 0.35);
  color: var(--text-primary);
}

.skill-item:hover .micro-pill {
  border-color: rgba(56, 189, 248, 0.36);
  color: var(--text-primary);
}

.skill-item-purple:hover .micro-pill {
  border-color: rgba(167, 139, 250, 0.4);
}

.skill-item-green:hover .micro-pill {
  border-color: rgba(16, 185, 129, 0.38);
}

.skill-item-orange:hover .micro-pill {
  border-color: rgba(251, 146, 60, 0.4);
}

.micro-pill:hover {
  background-color: var(--accent-blue-glow);
  color: var(--accent-blue) !important;
  border-color: var(--accent-blue) !important;
  transform: translateY(-2px);
}

.skill-item-purple .micro-pill:hover,
.skill-item.active-theme-purple .micro-pill:hover {
  background-color: var(--accent-purple-glow);
  color: var(--accent-purple) !important;
  border-color: var(--accent-purple) !important;
}

.skill-item-green .micro-pill:hover,
.skill-item.active-theme-green .micro-pill:hover {
  background-color: var(--accent-green-glow);
  color: var(--accent-green-bright) !important;
  border-color: var(--accent-green-bright) !important;
}

.skill-item-orange .micro-pill:hover {
  background-color: var(--accent-orange-glow);
  color: var(--accent-orange) !important;
  border-color: var(--accent-orange) !important;
}

.skill-item.active-theme-blue .micro-pill:hover {
  background-color: var(--accent-blue-glow);
  color: var(--accent-blue) !important;
  border-color: var(--accent-blue) !important;
}

/* ==========================================================================
   4. CONTACTO & FOOTER
   ========================================================================== */

#contacto {
  padding-bottom: 3rem;
}

.contact-card {
  background: linear-gradient(145deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 3rem 2.5rem;
  box-shadow: var(--shadow-card);
}

.contact-content {
  max-width: 720px;
}

.contact-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.contact-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 2rem;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
}

.contact-cta-btn {
  padding: 0.78rem 1.35rem;
  border-radius: 0.6rem;
  font-size: 0.92rem;
}

.contact-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.15rem;
  border-radius: 0.6rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  font-weight: 500;
  font-size: 0.92rem;
}

.contact-pill:hover {
  border-color: var(--border-hover);
  color: var(--accent-blue);
  transform: translateY(-2px);
}

/* Modal Flotante de Contacto Interactivo */
.contact-modal-dialog {
  max-width: 540px;
  transform: translateY(-24px) scale(0.96);
}

.contact-modal-backdrop.is-open .contact-modal-dialog {
  transform: translateY(0) scale(1);
}

.contact-modal-intro {
  margin-bottom: 1.35rem;
}

.contact-modal-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.sr-only-honeypot {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.form-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.form-input {
  width: 100%;
  padding: 0.78rem 0.95rem;
  border-radius: 0.55rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.92rem;
  line-height: 1.5;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

.form-input.is-invalid,
.form-input.is-invalid:focus {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.16);
}

.form-field-error {
  font-size: 0.76rem;
  color: #f87171;
  line-height: 1.4;
  margin-top: 0.1rem;
}

.form-textarea {
  resize: vertical;
  min-height: 128px;
}

.contact-form-feedback {
  padding: 0.75rem 1rem;
  border-radius: 0.55rem;
  font-size: 0.82rem;
  line-height: 1.5;
}

.contact-form-feedback.is-success {
  background-color: var(--accent-green-glow);
  color: var(--accent-green-bright);
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.contact-form-feedback.is-error {
  background-color: rgba(239, 68, 68, 0.12);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.35);
}

.contact-form-actions {
  display: flex;
  justify-content: flex-end;
  padding-top: 0.35rem;
}

.contact-submit-btn {
  width: 100%;
}

.contact-submit-btn.is-loading,
.contact-submit-btn:disabled {
  opacity: 0.75;
  cursor: wait;
  transform: none;
}

.contact-submit-btn.is-success {
  background: linear-gradient(135deg, var(--accent-green), #059669);
  box-shadow: 0 4px 20px var(--accent-green-glow);
}

.site-footer {
  margin-top: auto;
  width: 100%;
  padding: 1.75rem 1.5rem 2.25rem;
  border-top: 1px solid var(--border-subtle);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.back-to-top {
  margin-left: auto;
  white-space: nowrap;
}

.back-to-top:hover {
  color: var(--accent-blue);
}

/* ==========================================================================
   ANIMACIONES DE ENTRADA (FADE-IN / SLIDE-UP CON ESCALONAMIENTO)
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 {
  transition-delay: 0.1s;
}

.reveal-delay-2 {
  transition-delay: 0.2s;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .skill-bar-fill {
    transition: none;
    width: var(--target-width, 85%);
  }
}

/* ==========================================================================
   DISEÑO RESPONSIVO (TABLET & MOBILE)
   ========================================================================== */

@media (max-width: 960px) {
  .section-header,
  #stack .section-header {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    text-align: left;
    gap: 1.35rem;
  }

  .section-header > div:first-child,
  .section-header-info,
  #stack .section-header-info {
    max-width: 100%;
    width: 100%;
    text-align: left;
  }

  .project-filters,
  .stack-domain-bar {
    justify-content: flex-start;
    margin-left: 0;
    width: 100%;
  }
}

@media (max-width: 920px) {
  .hero {
    min-height: auto;
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .projects-grid,
  .stack-grid {
    grid-template-columns: 1fr;
    gap: 1.35rem;
  }
}

@media (max-width: 768px) {
  .section,
  #contacto {
    padding-block: 1.5rem;
    scroll-margin-top: 4.5rem;
  }

  .mobile-menu-btn {
    display: flex;
    min-width: 2.65rem;
    min-height: 2.65rem;
  }

  .nav-wrapper {
    position: absolute;
    top: 4.5rem;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
    padding: 1.5rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 18px 36px -10px rgba(0, 0, 0, 0.5);
    display: none;
  }

  .nav-wrapper.open {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
    width: 100%;
  }

  .nav-link {
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 2.5rem;
    font-size: 0.98rem;
  }

  .hero-title {
    font-size: clamp(1.75rem, 6vw, 2.35rem);
  }

  .hero-description {
    font-size: 0.98rem;
  }

  .filter-btn,
  .domain-chip {
    min-height: 2.55rem;
    padding: 0.5rem 0.95rem;
  }

  .contact-card {
    padding: 2rem 1.35rem;
  }

  /* Evita auto-zoom en iOS Safari al enfocar campos y mejora área táctil */
  .form-input {
    font-size: 1rem;
    min-height: 2.85rem;
  }

  .project-modal-close {
    width: 2.4rem;
    height: 2.4rem;
  }
}

@media (max-width: 560px) {
  .container {
    padding-inline: 1.15rem;
  }

  .section,
  #contacto {
    padding-block: 1.25rem;
  }

  .hero {
    padding-top: 1.75rem;
    padding-bottom: 2rem;
  }

  .status-badge {
    font-size: 0.7rem;
    padding: 0.35rem 0.75rem;
    max-width: 100%;
  }

  .hero-cta .btn {
    width: 100%;
    min-height: 3rem;
  }

  .terminal-body {
    padding: 1rem;
    font-size: 0.76rem;
  }

  .stack-category {
    padding: 1.25rem 1.1rem;
  }

  .skill-item {
    padding: 1rem;
  }

  .contact-links {
    flex-direction: column;
    align-items: stretch;
  }

  .contact-cta-btn,
  .contact-pill {
    width: 100%;
    justify-content: center;
    min-height: 3rem;
  }

  .project-modal-backdrop {
    padding: 0.75rem;
  }

  .project-modal-dialog {
    max-height: 92vh;
    max-height: 92dvh;
    border-radius: 0.85rem;
  }

  .project-modal-header {
    padding: 0.85rem 1.05rem;
  }

  .project-modal-body {
    padding: 1.1rem 1.05rem;
  }

  .project-modal-footer {
    padding: 0.9rem 1.05rem;
  }

  .project-modal-github-btn {
    width: 100%;
    min-height: 2.9rem;
  }

  .footer-inner {
    justify-content: space-between;
    gap: 0.75rem;
  }

  .back-to-top {
    margin-left: auto;
    align-self: flex-end;
  }
}