/* ============================================
   Ansh Shah Portfolio - Design System
   Editorial-Brutalist with Architectural Warmth
   ============================================ */

/* CSS Variables */
:root {
  --bg:           #F5F2ED;   /* warm off-white / drafting paper */
  --ink:          #1A1A18;   /* near-black, not pure black */
  --accent:       #C4622D;   /* burnt sienna / terra cotta */
  --accent-light: #E8DDD0;   /* warm sand */
  --line:         #C8BFB4;   /* subtle rule line color */
  --white:        #FFFFFF;
  
  /* Typography */
  --font-display: 'Cormorant Garamond', serif;
  --font-mono:    'Space Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-display);
  background-color: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ============================================
   Navigation
   ============================================ */

.sticky-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 3rem;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.nav-name {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--ink);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
  padding-bottom: 4px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a.active {
  color: var(--accent);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  display: flex;
  min-height: calc(100vh - 70px);
  padding: 4rem 3rem 6rem;
}

.hero-text {
  flex: 0 0 60%;
  padding-right: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 1rem;
  animation: fadeUp 0.8s ease forwards;
  opacity: 0;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(4rem, 10vw, 7.5rem);
  letter-spacing: -0.02em;
  line-height: 0.9;
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s ease forwards;
  animation-delay: 0.1s;
  opacity: 0;
}

.hero-sub {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.5rem;
  font-weight: 300;
  margin-bottom: 2rem;
  animation: fadeUp 0.8s ease forwards;
  animation-delay: 0.2s;
  opacity: 0;
}

.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 2.5rem;
  animation: fadeUp 0.8s ease forwards;
  animation-delay: 0.3s;
  opacity: 0;
}

.hero-meta span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  opacity: 0.6;
}

.cta-btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  padding: 0.875rem 1.75rem;
  border: 1px solid var(--ink);
  transition: all 0.3s ease;
  width: fit-content;
  animation: fadeUp 0.8s ease forwards;
  animation-delay: 0.4s;
  opacity: 0;
}

.cta-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--white);
}

.hero-visual {
  flex: 0 0 40%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.hero-visual svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  animation: fadeIn 1s ease forwards;
  animation-delay: 0.5s;
  opacity: 0;
}

/* ============================================
   Selected Work Section
   ============================================ */

.work {
  padding: 4rem 3rem 6rem;
  border-top: 1px solid var(--line);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 3rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--line);
}

.project-card {
  position: relative;
  overflow: hidden;
  background: var(--white);
  transition: transform 0.3s ease;
}

.project-card:hover {
  transform: translateY(-4px);
}

.project-card a {
  display: block;
}

.card-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--accent-light);
}

.placeholder-gradient {
  width: 100%;
  height: 100%;
}

.gradient-1 {
  background: linear-gradient(135deg, rgba(196, 98, 45, 0.15), rgba(26, 26, 24, 0.25));
}

.gradient-2 {
  background: linear-gradient(135deg, rgba(46, 93, 75, 0.15), rgba(196, 98, 45, 0.15));
}

.gradient-3 {
  background: linear-gradient(135deg, rgba(26, 26, 24, 0.12), rgba(196, 98, 45, 0.08));
}

.gradient-4 {
  background: linear-gradient(135deg, rgba(200, 191, 180, 0.25), rgba(46, 93, 75, 0.15));
}

.card-info {
  padding: 1.5rem;
  border-top: 2px solid var(--accent);
}

.card-num {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 0.5rem;
}

.card-info h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.card-info p {
  font-family: var(--font-display);
  font-size: 0.95rem;
  opacity: 0.7;
  margin-bottom: 0.5rem;
}

.card-tools {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--line);
  letter-spacing: 0.1em;
  display: block;
  margin-top: 0.75rem;
}

/* ============================================
   Footer
   ============================================ */

footer {
  padding: 2rem 3rem;
  border-top: 1px solid var(--line);
  text-align: center;
}

footer p {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  opacity: 0.6;
}

footer a:hover {
  color: var(--accent);
}

/* ============================================
   Flipbook Page Styles
   ============================================ */

.flipbook-section {
  min-height: calc(100vh - 70px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  background: var(--ink);
}

.flipbook-header {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--bg);
}

.flipbook-header h2 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 300;
}

#flipbook-wrapper {
  box-shadow: 0 40px 80px rgba(0, 0, 0, 0.6);
}

#flipbook .page {
  background: var(--white);
}

#flipbook .page img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.flipbook-controls {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-top: 2rem;
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 12px;
}

.flipbook-controls button {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 0.5rem 1.5rem;
  cursor: pointer;
  letter-spacing: 0.1em;
  transition: background 0.2s, color 0.2s;
}

.flipbook-controls button:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.flipbook-controls button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.flipbook-controls button:disabled:hover {
  background: transparent;
  border-color: var(--line);
}

.flipbook-hint {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--line);
  margin-top: 1rem;
  letter-spacing: 0.12em;
}

.footer-dark {
  background: var(--ink);
  border-top: 1px solid rgba(200, 191, 180, 0.2);
}

.footer-dark p {
  color: var(--bg);
  opacity: 0.6;
}

.footer-dark a {
  color: var(--bg);
}

.footer-dark a:hover {
  color: var(--accent);
}

/* Loading State */
#loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem;
  color: var(--bg);
}

#loading-state p {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  margin-top: 1.5rem;
  opacity: 0.6;
}

.loader-ring {
  width: 48px;
  height: 48px;
  border: 3px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Hide loading state when loaded */
#loading-state.hidden {
  display: none;
}

#flipbook-wrapper.hidden {
  display: none;
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
  .hero {
    padding: 3rem 2rem 4rem;
  }
  
  .work {
    padding: 3rem 2rem 4rem;
  }
  
  .sticky-nav {
    padding: 1rem 2rem;
  }
}

@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    min-height: auto;
    padding: 2rem 1.5rem 3rem;
  }
  
  .hero-text {
    flex: none;
    padding-right: 0;
    padding-bottom: 2rem;
  }
  
  .hero h1 {
    font-size: 4rem;
  }
  
  .hero-sub {
    font-size: 1.25rem;
  }
  
  .hero-visual {
    flex: none;
    padding: 1rem 0;
  }
  
  .hero-visual svg {
    max-width: 280px;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .work {
    padding: 2rem 1.5rem 3rem;
  }
  
  .sticky-nav {
    padding: 1rem 1.5rem;
  }
  
  .nav-links {
    gap: 1.5rem;
  }
  
  .flipbook-section {
    padding: 2rem 1rem;
  }
  
  .flipbook-header h2 {
    font-size: 1.75rem;
  }
  
  .flipbook-controls {
    gap: 1rem;
  }
  
  footer {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 3rem;
  }
  
  .hero-sub {
    font-size: 1.1rem;
  }
  
  .cta-btn {
    width: 100%;
    text-align: center;
  }
  
  .nav-name {
    font-size: 0.75rem;
  }
  
  .nav-links a {
    font-size: 0.65rem;
  }
}