/* ==========================================================================
   RENTALA SRUTHI - PORTFOLIO STYLESHEET
   Aesthetic: Editorial High-Contrast Minimalist (High-End Design Agency Inspired)
   ========================================================================== */

:root {
  /* Editorial Palette */
  --bg-sand: #EAE6DF;
  --bg-sand-light: #F5F2EC;
  --bg-sand-subtle: #E2DDD5;
  --bg-dark: #121212;
  --bg-dark-card: #1A1A1A;
  --bg-dark-card-hover: #222222;
  --card-light: #FFFFFF;
  --card-light-tint: #F7F5F0;
  
  /* Text */
  --text-primary: #161616;
  --text-muted: #666666;
  --text-light: #F4F1EA;
  --text-light-muted: #9A9995;
  
  /* Accents */
  --accent-terra: #C85A32;
  --accent-amber: #D97706;
  --accent-green: #10B981;
  --accent-border-dark: rgba(255, 255, 255, 0.12);
  --border-light: rgba(22, 22, 22, 0.14);
  
  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Radii & Transitions */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Base Reset & Document Flow (Ensures continuous, unrestricted vertical scroll) */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-sand);
  color: var(--text-primary);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100%;
  height: auto;
  overflow-x: hidden;
  overflow-y: auto;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-sand);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100%;
  height: auto;
  overflow-x: hidden;
  overflow-y: auto;
  position: relative;
  width: 100%;
}

main {
  display: block;
  width: 100%;
  min-height: 100%;
  height: auto;
  position: relative;
  overflow: visible;
}

section {
  width: 100%;
  height: auto;
  min-height: auto;
  position: relative;
  overflow: visible;
}

/* Selection */
::selection {
  background-color: var(--text-primary);
  color: var(--bg-sand);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-sand);
}
::-webkit-scrollbar-thumb {
  background: rgba(22, 22, 22, 0.25);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(22, 22, 22, 0.5);
}

/* Typography Utilities */
.font-display {
  font-family: var(--font-display);
}
.font-serif {
  font-family: var(--font-serif);
}
.font-mono {
  font-family: var(--font-mono);
}

/* Layout Containers */
.container-custom {
  width: 100%;
  max-width: 1360px;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.25rem, 4vw, 3.5rem);
  padding-right: clamp(1.25rem, 4vw, 3.5rem);
}

/* Navigation */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: rgba(234, 230, 223, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.site-nav.scrolled {
  background-color: rgba(234, 230, 223, 0.98);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  position: relative;
  transition: color var(--transition-fast);
  color: var(--text-primary);
  text-decoration: none;
  padding: 0.35rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: currentColor;
  transition: width var(--transition-smooth);
}

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

/* Hero Section */
.hero-section {
  padding-top: clamp(7rem, 14vh, 10.5rem);
  padding-bottom: clamp(4rem, 8vh, 7rem);
  border-bottom: 1px solid var(--border-light);
  position: relative;
  height: auto;
  min-height: auto;
  opacity: 1 !important;
  visibility: visible !important;
}

.hero-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  border-radius: 9999px;
  background-color: var(--card-light);
  border: 1px solid var(--border-light);
  font-family: var(--font-mono);
  font-size: 0.775rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  position: relative;
}

.status-dot::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background-color: var(--accent-green);
  opacity: 0.45;
  animation: pulse-ring 2s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.8); opacity: 0.8; }
  50% { transform: scale(1.8); opacity: 0; }
  100% { transform: scale(0.8); opacity: 0; }
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  line-height: 0.92;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  font-size: clamp(3rem, 9.5vw, 8.8rem);
}

.hero-title .font-normal {
  color: var(--accent-terra);
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.hero-title .font-bold {
  color: var(--text-primary);
  font-weight: 800;
}

.hero-title .italic-flair {
  font-family: var(--font-serif);
  font-weight: 400;
  text-transform: none;
  font-style: italic;
  letter-spacing: -0.01em;
}

.hero-subtitle {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.2vw, 1.85rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-top: 1.5rem;
  line-height: 1.25;
}

.hero-tagline {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  color: var(--text-muted);
  max-width: 48ch;
  line-height: 1.6;
}

/* Editorial Ticker / Marquee */
.marquee-bar {
  background-color: var(--text-primary);
  color: var(--bg-sand);
  overflow: hidden;
  white-space: nowrap;
  padding: 0.9rem 0;
  border-top: 1px solid var(--text-primary);
  border-bottom: 1px solid var(--text-primary);
  height: auto;
}

.marquee-inner {
  display: inline-flex;
  align-items: center;
  gap: 2.5rem;
  animation: marquee 28s linear infinite;
}

.marquee-inner:hover {
  animation-play-state: paused;
}

.marquee-item {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 1.25rem;
}

.marquee-sep {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--accent-terra);
  display: inline-block;
}

@keyframes marquee {
  0% { transform: translateX(0%); }
  100% { transform: translateX(-50%); }
}

/* Dark Contrast Section - Selected Work */
.section-dark {
  background-color: var(--bg-dark);
  color: var(--text-light);
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  opacity: 1 !important;
  visibility: visible !important;
  height: auto;
  min-height: auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1.5px;
  background-color: currentColor;
}

.section-heading-editorial {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: 0.98;
  font-size: clamp(2.25rem, 5.5vw, 4.5rem);
}

/* Category Filter Tabs */
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  background: transparent;
  color: var(--text-light-muted);
  border: 1px solid rgba(255, 255, 255, 0.14);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-light);
  border-color: rgba(255, 255, 255, 0.35);
  background-color: rgba(255, 255, 255, 0.04);
}

.filter-btn.active {
  background-color: var(--text-light);
  color: var(--bg-dark);
  border-color: var(--text-light);
  font-weight: 700;
}

/* Project Cards */
.project-card {
  background-color: var(--bg-dark-card);
  border: 1px solid var(--accent-border-dark);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3.2vw, 2.5rem);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), background-color var(--transition-smooth), box-shadow var(--transition-smooth);
  cursor: pointer;
  overflow: hidden;
  opacity: 1 !important;
  visibility: visible !important;
  height: auto;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-terra), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.project-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.32);
  background-color: var(--bg-dark-card-hover);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.5);
}

.project-card:hover::before {
  opacity: 1;
}

.project-index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--text-light-muted);
}

.project-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  background-color: rgba(255, 255, 255, 0.07);
  color: #ECEAE6;
  border: 1px solid rgba(255, 255, 255, 0.12);
  letter-spacing: 0.04em;
}

.project-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.3vw, 1.95rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.18;
  color: var(--text-light);
  margin-top: 0.75rem;
}

.project-role-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--accent-terra);
  margin-top: 0.25rem;
}

.project-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-light-muted);
  margin-top: 1rem;
}

.tech-pill {
  font-family: var(--font-mono);
  font-size: 0.725rem;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  background-color: rgba(255, 255, 255, 0.05);
  color: #DDD9D2;
  border: 1px solid rgba(255, 255, 255, 0.08);
  white-space: nowrap;
}

.project-card:hover .arrow-icon {
  transform: translate(3px, -3px);
  color: var(--text-light);
}

.arrow-icon {
  transition: transform var(--transition-fast), color var(--transition-fast);
}

/* Technical Matrix Section */
.matrix-card {
  background-color: var(--card-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
  opacity: 1 !important;
  visibility: visible !important;
  height: auto;
}

.matrix-card:hover {
  transform: translateY(-3px);
  border-color: rgba(22, 22, 22, 0.35);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.05);
}

.skill-tag-pill {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  background-color: var(--bg-sand-light);
  border: 1px solid rgba(22, 22, 22, 0.08);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.skill-tag-pill:hover {
  background-color: #FFFFFF;
  border-color: rgba(22, 22, 22, 0.25);
  transform: translateY(-1px);
}

/* Timeline & Honors */
.timeline-item {
  position: relative;
  padding-left: 2.25rem;
  border-left: 1.5px solid var(--border-light);
  padding-bottom: 2rem;
  opacity: 1 !important;
  visibility: visible !important;
  height: auto;
}

.timeline-item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  top: 0.25rem;
  left: -5.5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--text-primary);
  border: 2px solid var(--bg-sand);
}

.cert-card {
  background-color: var(--card-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
  opacity: 1 !important;
  visibility: visible !important;
  height: auto;
}

.cert-card:hover {
  transform: translateY(-2px);
  border-color: rgba(22, 22, 22, 0.3);
}

/* Call to Action & Footer */
.cta-massive-title {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.03em;
  line-height: 0.92;
  font-size: clamp(2.5rem, 7.5vw, 6.5rem);
  color: var(--text-light);
}

.btn-editorial-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.9rem 1.85rem;
  border-radius: 9999px;
  background-color: var(--text-light);
  color: var(--bg-dark);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--text-light);
  cursor: pointer;
  transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-editorial-primary:hover {
  background-color: transparent;
  color: var(--text-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.1);
}

.btn-editorial-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.9rem 1.85rem;
  border-radius: 9999px;
  background-color: transparent;
  color: var(--text-light);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.28);
  cursor: pointer;
  transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.btn-editorial-outline:hover {
  border-color: var(--text-light);
  background-color: rgba(255, 255, 255, 0.06);
  transform: translateY(-2px);
}

.digital-footprint-grid > a {
  min-width: 0;
}

.digital-footprint-grid > a span {
  overflow-wrap: anywhere;
  text-align: center;
}

/* Light Button Variants */
.btn-sand-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.85rem 1.75rem;
  border-radius: 9999px;
  background-color: var(--text-primary);
  color: var(--bg-sand);
  font-family: var(--font-display);
  font-size: 0.825rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--text-primary);
  cursor: pointer;
  transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.btn-sand-primary:hover {
  background-color: transparent;
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-sand-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.85rem 1.75rem;
  border-radius: 9999px;
  background-color: transparent;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 0.825rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--border-light);
  cursor: pointer;
  transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.btn-sand-outline:hover {
  border-color: var(--text-primary);
  background-color: rgba(22, 22, 22, 0.04);
  transform: translateY(-2px);
}

/* Modal / Drawer (Strictly hidden when inactive) */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(14, 14, 14, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-backdrop.active {
  display: flex !important;
}

.modal-content {
  background-color: var(--bg-dark-card);
  color: var(--text-light);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-xl);
  max-width: 820px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.65);
  position: relative;
}

/* Toast Notification */
.toast-notice {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 2000;
  background-color: var(--text-primary);
  color: var(--bg-sand);
  padding: 0.75rem 1.25rem;
  border-radius: 9999px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: none;
  align-items: center;
  gap: 0.6rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.toast-notice.show {
  display: flex !important;
}

/* Mobile Navigation Drawer */
.mobile-nav-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  max-height: 100vh;
  background-color: var(--bg-sand);
  z-index: 95;
  display: none;
  flex-direction: column;
  justify-content: center;
  padding: 2.5rem;
  overflow-y: auto;
}

.mobile-nav-menu.active {
  display: flex !important;
}

/* Neutralize reveal-on-scroll completely */
.reveal-on-scroll {
  opacity: 1 !important;
  transform: none !important;
  visibility: visible !important;
}

/* Accessibility Focus States */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent-terra);
  outline-offset: 3px;
}