/* ===================================================================== */
/* ESTUDOS BÍBLICOS - DESIGN SYSTEM                                     */
/* Base stylesheet for biblical studies presentations                    */
/* ===================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,500&family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,600;0,9..144,800;1,9..144,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* ===== CSS Variables (Design Tokens) ===== */
:root {
  /* Colors */
  --ink: #1a1512;
  --parchment: #f4ecdc;
  --parchment-deep: #e8dcc0;
  --gold: #b8873d;
  --gold-light: #d4a962;
  --crimson: #7a2e2a;
  --sea: #2d4a5c;
  --shadow: rgba(26, 21, 18, 0.15);
  
  /* Typography */
  --display: 'Fraunces', serif;
  --body: 'Cormorant Garamond', serif;
  --mono: 'JetBrains Mono', monospace;
  
  /* Mobile Spacing - Compact */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.25rem;
  --space-xl: 1.5rem;
  --space-2xl: 2rem;
  --space-3xl: 2.5rem;

  /* Typography Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Animations */
  --ease-out: cubic-bezier(.2,.7,.2,1);
  --duration-fast: 0.2s;
  --duration-normal: 0.7s;
  --duration-slow: 1.4s;
}

/* ===== Reset & Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  height: 100%;
  font-family: var(--body);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

/* ===== Typography ===== */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.eyebrow::after {
  content: '';
  flex: 1;
  height: 1px;
  background: currentColor;
  opacity: 0.4;
  max-width: 120px;
}

h1, h2, h3, h4, h5, h6 { 
  font-family: var(--display); 
  font-weight: 400; 
  line-height: 1.05; 
  letter-spacing: -0.02em; 
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); font-weight: 500; }
h4 { font-size: var(--text-xl); font-weight: 500; }
h5 { font-size: var(--text-lg); font-weight: 600; }
h6 { font-size: var(--text-base); font-weight: 600; }

.lede {
  font-size: var(--text-lg);
  line-height: 1.5;
  max-width: 50ch;
  color: #3a332c;
}

.body-text {
  font-size: var(--text-base);
  line-height: 1.6;
  color: #3a332c;
}

em.accent { 
  font-style: italic; 
  color: var(--crimson); 
  font-family: var(--display); 
}

/* ===== Textura de papel ===== */
.grain {
  position: fixed; 
  inset: 0; 
  pointer-events: none; 
  z-index: 999;
  opacity: 0.15; 
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

/* ===== Layout Components ===== */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section-padding {
  padding: var(--space-2xl) 0;
}

.corner-mark {
  position: absolute;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--ink);
  opacity: 0.4;
  text-transform: uppercase;
}
.corner-mark.tl { top: var(--space-lg); left: var(--space-lg); }
.corner-mark.br { bottom: var(--space-lg); right: var(--space-lg); }

/* ===== Slide System (para apresentações) ===== */
.deck {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg) var(--space-md);
  font-size: var(--text-sm);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity var(--duration-normal) var(--ease-out), 
              transform var(--duration-normal) var(--ease-out), 
              visibility 0s linear var(--duration-normal);
  background: var(--parchment);
  overflow-y: auto;
}

.slide.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--duration-normal) var(--ease-out), 
              transform var(--duration-normal) var(--ease-out), 
              visibility 0s linear 0s;
  z-index: 2;
}

.slide-inner {
  width: 100%;
  max-width: 1100px;
  position: relative;
}

/* ===== Theme Variants ===== */
.theme-dark {
  background: var(--ink);
  color: var(--parchment);
}

.theme-dark .corner-mark { color: var(--parchment); }

.theme-opener {
  background: linear-gradient(135deg, var(--parchment) 0%, var(--parchment-deep) 100%);
}

.theme-deep {
  background: var(--parchment-deep);
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  bottom: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: none;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: rgba(26, 21, 18, 0.85);
  backdrop-filter: blur(10px);
  border-radius: 100px;
  border: 1px solid rgba(212, 169, 98, 0.2);
}

.nav button {
  background: none;
  border: none;
  color: var(--parchment);
  font-family: var(--mono);
  font-size: var(--text-xs);
  cursor: pointer;
  padding: 0.75rem 1rem;
  min-height: 44px;
  min-width: 44px;
  letter-spacing: 0.1em;
  transition: color var(--duration-fast);
  text-transform: uppercase;
}

.nav button:hover { 
  color: var(--gold-light); 
}

.nav .counter {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--gold-light);
  letter-spacing: 0.15em;
  min-width: 60px;
  text-align: center;
}

/* ===== Progress Dots ===== */
.progress-dots {
  position: fixed;
  top: auto;
  bottom: 5rem;
  left: 50%;
  right: auto;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  gap: 6px;
  padding: 0.5rem 0.8rem;
  background: rgba(26, 21, 18, 0.6);
  backdrop-filter: blur(6px);
  border-radius: 100px;
}

.progress-dots .dot {
  width: 6px; 
  height: 6px; 
  border-radius: 50%;
  background: rgba(244, 236, 220, 0.3);
  transition: background var(--duration-fast), transform var(--duration-fast);
  cursor: pointer;
}

.progress-dots .dot.active { 
  background: var(--gold-light); 
  transform: scale(1.5); 
}

/* ===== Animations ===== */
.slide.active .anim-1 { animation: rise var(--duration-normal) var(--ease-out) 0.1s both; }
.slide.active .anim-2 { animation: rise var(--duration-normal) var(--ease-out) 0.25s both; }
.slide.active .anim-3 { animation: rise var(--duration-normal) var(--ease-out) 0.4s both; }
.slide.active .anim-4 { animation: rise var(--duration-normal) var(--ease-out) 0.55s both; }
.slide.active .anim-5 { animation: rise var(--duration-normal) var(--ease-out) 0.7s both; }
.slide.active .anim-6 { animation: rise var(--duration-normal) var(--ease-out) 0.85s both; }

@keyframes rise {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.slide.active .fade-in { animation: fade var(--duration-slow) ease-out 0.3s both; }
@keyframes fade { 
  from { opacity: 0; } 
  to { opacity: 1; } 
}

/* ===== Mobile-First Responsive ===== */

/* Mobile base styles já definidos acima */

/* Tablet: 768px+ */
@media (min-width: 768px) {
  :root {
    --space-xs: 0.75rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 2.5rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    --text-base: 1.125rem;
    --text-lg: 1.25rem;
    --text-xl: 1.5rem;
    --text-2xl: 2rem;
    --text-3xl: 2.5rem;
    --text-4xl: 3.5rem;
  }

  .slide {
    padding: var(--space-xl) var(--space-lg);
    font-size: var(--text-base);
  }

  .slide h1 { font-size: var(--text-3xl); }
  .slide h2 { font-size: var(--text-2xl); }

  .studies-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
    padding: var(--space-2xl) var(--space-lg);
  }

  .progress-dots {
    top: var(--space-md);
    bottom: auto;
    left: auto;
    right: var(--space-md);
    transform: none;
  }

  .nav {
    display: flex;
  }
}

/* Desktop: 1200px+ */
@media (min-width: 1200px) {
  :root {
    --space-xs: 1rem;
    --space-sm: 1.25rem;
    --space-md: 2rem;
    --space-lg: 2.5rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    --text-base: 1.25rem;
    --text-lg: 1.5rem;
    --text-xl: 1.875rem;
    --text-2xl: 2.5rem;
    --text-3xl: 3.5rem;
    --text-4xl: 5rem;
  }

  .slide {
    padding: var(--space-2xl) var(--space-xl);
    font-size: var(--text-lg);
  }

  .slide h1 { font-size: var(--text-4xl); }
  .slide h2 { font-size: var(--text-3xl); }

  .studies-grid {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-2xl);
    padding: var(--space-3xl) var(--space-xl);
  }
}

/* ===== Menu Principal ===== */
.menu-hero {
  min-height: 100vh;
  background: var(--ink);
  color: var(--parchment);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.menu-hero .bg-word {
  position: absolute;
  font-family: var(--display);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(6rem, 30vw, 35rem);
  color: var(--parchment);
  opacity: 0.04;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  line-height: 0.8;
  letter-spacing: -0.05em;
  user-select: none;
  max-width: 100vw;
  overflow: hidden;
  white-space: nowrap;
}

.studies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
  padding: var(--space-2xl) 0;
}

.study-card {
  background: var(--parchment);
  border: 1px solid var(--parchment-deep);
  border-radius: 8px;
  padding: var(--space-xl);
  transition: transform var(--duration-fast), box-shadow var(--duration-fast);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.study-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 40px var(--shadow);
}

.study-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
}

.study-meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-sm);
}

.study-card h3 {
  font-size: 1.8rem;
  margin-bottom: var(--space-sm);
  font-weight: 600;
}

.study-description {
  color: #3a332c;
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.study-cta {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--crimson);
  font-weight: 500;
}