/* ----------------------------------- PALETA DE COLORES PRINCIPAL ----------------------------------- */
:root {
  --bg-main: #101010;
  --bg-secondary: #141414;
  --bg-tertiary: #181818;
  --text-main: #EBEBEB;
  --text-secondary: #A8A8A8;
  --text-muted: #555555;
  --text-title-task: #E0E0E0;
  --border-main: #2A2A2A;
  --border-panel: #3B3B3B;
  --btn-func-bg: #2B2B2B;
  --btn-func-hover: #262626;
  --btn-func-click: #0F0F0F;
  --font-family: 'Poppins', sans-serif;
  --font-size-base: 16px;
  --font-weight-regular: 400;
  --font-weight-semibold: 600;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 10px;

  /* COLORES DE ESTADO (Según funcionalidad) */
  --color-todo: #FF6B6B;     /* Rojo */
  --color-doing: #FFD93D;    /* Amarillo */
  --color-done: #6BCB77;     /* Verde */
  --color-archive: #4D96FF;  /* Azul */
  
  /* Colores de acento para la página */
  --accent-color: var(--color-archive); 
  --secondary-color: var(--color-done);
}

/* ----------------------------------- ESTILOS BASE | PRINCIPALES ----------------------------------- */
* {
  box-sizing: border-box;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  font-size: var(--font-size-base);
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--text-main);
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

a:hover {
  color: var(--text-secondary);
}

h1, h2, h3 {
  font-weight: var(--font-weight-semibold);
  color: var(--text-title-task);
  margin-bottom: 0.7em;
  line-height: 1.2;
}

h1 { font-size: 3.5em; }
h2 { font-size: 2.2em; }
h3 { font-size: 1.5em; }

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 0;
}

section {
  padding: 120px 0;
  border-bottom: 1px solid var(--border-main);
  position: relative;
  overflow: hidden;
}

section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
}

section > * {
  position: relative;
  z-index: 1;
}

/* ----------------------------------- FONDOS DINÁMICOS ----------------------------------- */
.hero::before {
  background: radial-gradient(ellipse at center, rgba(85, 85, 85, 0.12) 0%, transparent 60%);
}

.feature-section::before {
  background-image: radial-gradient(circle, rgba(85, 85, 85, 0.15) 1px, transparent 1px);
  background-size: 24px 24px;
}

.feature-section.alt-bg::before {
  background: radial-gradient(ellipse at center, rgba(85, 85, 85, 0.15) 0%, transparent 70%);
}

.final-cta::before {
  background: linear-gradient(135deg, rgba(85, 85, 85, 0.06) 0%, rgba(42, 42, 42, 0.12) 100%);
}

/* ----------------------------------- UTILIDADES ----------------------------------- */
.text-center { text-align: center; }
.max-width-md { max-width: 720px; margin: 0 auto; }
.max-width-lg { max-width: 1000px; margin: 0 auto; }

/* Scrollbar Premium */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-panel);
  border-radius: 4px;
  transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Material Icons Optimizados */
.material-icons-round {
  font-family: 'Material Icons Round';
  font-weight: normal;
  font-style: normal;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
  line-height: 1;
  text-transform: none;
  letter-spacing: normal;
  white-space: nowrap;
  direction: ltr;
}

.icon-small { font-size: 1.3em; line-height: 1; }
.icon-large { font-size: 2.2em; line-height: 1; margin-bottom: 0.3em; }

/* ----------------------------------- SISTEMA DE BOTONES PREMIUM ----------------------------------- */
.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 0.95em;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--btn-func-bg) 0%, var(--btn-func-hover) 100%);
  color: var(--text-main);
  border-color: var(--border-panel);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
  transition: left 0.6s ease;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--btn-func-hover) 0%, var(--btn-func-click) 100%);
  border-color: var(--text-muted);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  transform: translateY(-3px);
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:active {
  background-color: var(--btn-func-click);
  transform: translateY(-1px) scale(0.98);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-secondary);
  border-color: var(--border-panel);
}

.btn-secondary:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--text-muted);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* ----------------------------------- ANIMACIONES FLUIDAS ----------------------------------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInScale {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.animate-up { animation: fadeInUp 0.8s ease-out forwards; }
.animate-scale { animation: fadeInScale 0.7s ease-out forwards; }

/* ----------------------------------- ESTILOS | HEADER / NAVBAR ----------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(16, 16, 16, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-main);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  max-width: 1300px;
  margin: 0 auto;
  width: 92%;
}

/* ---------------- LOGO ---------------- */
.logo a {
  font-size: 1.4em;
  font-weight: var(--font-weight-semibold);
  color: var(--text-title-task);
  transition: color 0.3s ease;
  letter-spacing: -0.02em;
}

.logo a:hover {
  color: var(--text-main);
}

/* ---------------- NAVEGACIÓN ---------------- */
.main-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 24px); /* Espaciado dinámico según ancho */
  flex-wrap: wrap; /* Evita desbordamientos */
  justify-content: center;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--text-secondary);
  font-size: 0.93em;
  font-weight: var(--font-weight-regular);
  position: relative;
  padding: 6px 0;
  transition: color 0.3s ease;
  white-space: nowrap;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--text-main);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.main-nav a:hover {
  color: var(--text-main);
}

.main-nav a:hover::after {
  width: 100%;
}

/* ---------------- BOTÓN (CTA) ---------------- */
.main-nav a.nav-cta {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  background-color: var(--btn-func-bg);
  border: 2px solid var(--border-panel);
  color: var(--text-main);
  font-weight: var(--font-weight-medium);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.main-nav a.nav-cta::after {
  display: none;
}

.main-nav a.nav-cta:hover {
  background-color: var(--btn-func-hover);
  border-color: #505050;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* ----------------------------------- HERO SECTION IMPACTANTE ----------------------------------- */
.hero {
  padding-top: 160px;
  padding-bottom: 140px;
  position: relative;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-content h1 {
  font-size: clamp(2.5em, 6vw, 4em);
  line-height: 1.1;
  margin-bottom: 32px;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--text-title-task) 0%, var(--text-main) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.1em, 2.5vw, 1.3em);
  color: var(--text-secondary);
  margin-bottom: 50px;
  line-height: 1.7;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* ----------------------------------- SECCIONES DE FEATURES ----------------------------------- */
.feature-section {
  background-color: var(--bg-main);
}

.feature-section.alt-bg {
  background-color: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: 70px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.section-header-title-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 0;
}

.section-header .material-icons-round {
  color: var(--text-main);
  font-size: 2.2em;
  line-height: 1;
}

.section-header-title-wrapper h2 {
    margin-bottom: 0;
}

.section-header h2 {
    font-size: 2.2em;
}

.section-description {
  font-size: 1.15em;
  color: var(--text-secondary);
  max-width: 750px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ----------------------------------- BLOQUE DE DETALLES DE FEATURE ----------------------------------- */
.feature-detail-block {
  padding: 50px 0;
  border-bottom: 1px dashed var(--border-panel);
}

.feature-detail-block:last-child {
  border-bottom: none;
}

/* ----------------------------------- LAYOUT DOS COLUMNAS ----------------------------------- */
.two-column-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  max-width: 1200px;
  margin: 0 auto;
  align-items: center;
}

.column-content {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.column-content h3 {
    margin-top: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.column-content h4 {
    font-size: 1.3em;
    margin-bottom: 10px;
}

.column-content p {
    color: var(--text-secondary);
}

.icon-box-large {
    background: var(--bg-tertiary);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-panel);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.icon-box-large span {
    /* Usar un color secundario o el color de acento */
    color: var(--text-main);
}

/* ----------------- LISTAS DE DETALLE (Feature List) ----------------- */
.feature-list, .benefit-list {
  list-style: none;
}

.feature-list li, .benefit-list li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-panel);
  transition: all 0.3s ease;
  color: var(--text-secondary);
}

.feature-list li:hover, .benefit-list li:hover {
  padding-left: 8px;
  border-color: var(--text-main);
  color: var(--text-main);
}

.feature-list li strong {
    color: var(--text-title-task);
    display: block;
    margin-bottom: 4px;
}

.feature-list span, .benefit-list .material-icons-round {
  font-size: 1.5em;
  color: var(--text-main);
  margin-top: 3px;
  flex-shrink: 0;
}

/* ----------------- HIERARCHY DIAGRAM (Organización Jerárquica) ----------------- */
.hierarchy-diagram pre {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-panel);
  border-left: 5px solid var(--text-main);
  padding: 20px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-family: monospace;
  font-size: 1em;
  color: var(--text-main);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

/* ----------------- COLOR DETAILS (Sistema de Colores) ----------------- */
.color-details {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-panel);
    padding: 25px;
    border-radius: var(--radius-md);
}

.color-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
}

.color-list li {
    font-weight: var(--font-weight-semibold);
    padding: 8px 0;
}

/* ----------------- PRIORITY AND SORTING (Prioridad y Ordenamiento) ----------------- */
.priority-list {
    list-style: none;
    padding: 0;
    background-color: var(--bg-tertiary);
    padding: 20px;
    border-radius: var(--radius-md);
    border-left: 5px solid var(--text-main);
}

.priority-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 10px 0;
    font-size: 1.1em;
}

.priority-list li span {
    font-size: 1.5em;
}

/* Colores de Prioridad específicos */
.priority-list li:nth-child(1) span { color: var(--color-done); } /* Baja */
.priority-list li:nth-child(2) span { color: var(--color-doing); } /* Media */
.priority-list li:nth-child(3) span { color: var(--color-todo); } /* Alta */


.sorting-criteria {
    list-style: none;
    padding: 0;
    background-color: var(--bg-tertiary);
    padding: 20px;
    border-radius: var(--radius-md);
    border-left: 5px solid var(--text-main);
}

.sorting-criteria li {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 10px 0;
    font-size: 1.05em;
    color: var(--text-secondary);
}

.sorting-criteria li strong {
    color: var(--text-main);
}

.sorting-criteria li span {
    font-size: 1.4em;
    color: var(--text-main);
}

/* ----------------- SECURITY GRID (Privacidad y Seguridad) ----------------- */
.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.security-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-panel);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.security-card:hover {
    border-color: var(--text-main);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(201, 201, 201, 0.15);
}

.security-card span {
    font-size: 3em;
    color: var(--text-main); /* Color de acento para la seguridad */
    margin-bottom: 10px;
    display: block;
}

.security-card h4 {
    font-size: 1.2em;
    margin-bottom: 10px;
}

blockquote {
    background-color: var(--bg-tertiary);
    border-left: 4px solid var(--text-main);
    margin: 0;
    padding: 20px 30px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
    font-style: italic;
    line-height: 1.6;
}

blockquote strong {
    color: var(--text-main);
    font-style: normal;
}

/* ----------------- OPTIMIZATION DETAILS (Rendimiento) ----------------- */
.indexed-columns {
    list-style: none;
    padding: 0;
    background-color: var(--bg-tertiary);
    padding: 20px;
    border-radius: var(--radius-md);
    border-left: 5px solid var(--text-main);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 10px 20px;
}

.indexed-columns li {
    padding: 8px 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 15px;
}

.indexed-columns li::before {
    content: "✓";
    color: var(--text-main);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* ----------------- DESIGN GRID (Diseño Moderno) ----------------- */
.design-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.design-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-panel);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.design-card:hover {
    border-color: var(--text-main);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(226, 226, 226, 0.15);
}

.design-card span {
    font-size: 3em;
    color: var(--text-main);
    margin-bottom: 10px;
    display: block;
}

.design-card h4 {
    font-size: 1.2em;
    margin-bottom: 10px;
}


/* ----------------------------------- ESTILOS | CTA FINAL ----------------------------------- */
.final-cta {
  padding-top: 120px;
  padding-bottom: 120px;
  background-color: var(--bg-main);
}

.final-cta-inner {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(20, 20, 20, 0.8) 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-panel);
  padding: 70px 50px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  position: relative;
  overflow: hidden;
}

.final-cta-inner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top, rgba(255, 255, 255, 0.03), transparent 60%);
  pointer-events: none;
}

.final-cta-inner h2 {
  font-size: 2.5em;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.final-cta-inner p {
  margin-bottom: 36px;
  font-size: 1.1em;
  color: var(--text-secondary);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}

.final-cta-inner .btn-primary {
  min-width: 250px;
  padding: 16px 40px;
  font-size: 1.05em;
  position: relative;
  z-index: 1;
}

.final-cta-inner .small-text {
  margin-top: 18px;
  font-size: 0.85em;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
}

/* ----------------------------------- ESTILOS | FOOTER ----------------------------------- */
.site-footer {
  padding: 0px 0;
  border-top: 1px solid var(--border-main);
  color: var(--text-secondary);
  font-size: 0.9em;
  background-color: var(--bg-main);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  width: 90%;
}

.footer-inner nav {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
}

.site-footer a {
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.site-footer a:hover {
  color: var(--text-main);
}

/* ----------------------------------- RESPONSIVE DESIGN ----------------------------------- */
@media (max-width: 1100px) {
  .main-nav ul {
    gap: 20px;
  }

  .two-column-layout {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .two-column-layout.reverse-on-mobile .column-content:first-child {
    order: 2;
  }
  .two-column-layout.reverse-on-mobile .column-content:last-child {
    order: 1;
  }

  .security-grid, .design-grid, .indexed-columns {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}

@media (max-width: 900px) {
  .hero {
    padding-top: 120px;
    padding-bottom: 100px;
  }

  section {
    padding: 100px 0;
  }

  .security-grid {
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
  }
}

@media (max-width: 850px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 0;
    gap: 16px;
  }

  .main-nav ul {
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 16px 24px;
    width: 100%;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 30px 0;
  }
  
  .final-cta {
    padding-top: 80px;
    padding-bottom: 80px;
  }
}

@media (max-width: 600px) {
  h1 {
    font-size: 2.2em;
  }

  h2 {
    font-size: 1.8em;
  }

  h3 {
    font-size: 1.3em;
  }

  section {
    padding: 80px 0;
  }

  .hero {
    padding-top: 90px;
    padding-bottom: 70px;
  }

  .final-cta-inner {
    padding: 48px 28px;
    margin: 0 20px;
  }

  .final-cta-inner h2 {
    font-size: 2.2em;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    text-align: center;
  }

  .footer-inner nav {
    order: 2;
    width: 100%;
    justify-content: center;
  }
  
  .security-grid, .design-grid, .indexed-columns, .color-list {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .priority-list, .sorting-criteria {
    border-left: none;
    padding: 20px;
  }
  
  .feature-detail-block {
    padding: 30px 0;
  }
}

@media (max-width: 400px) {
  .color-list {
    grid-template-columns: 1fr;
  }
}