/* ================================================
   PORTFOLIO – styles.css
   CUSTOMIZE: Update CSS variables in :root to
   change the color scheme across the whole site.
   ================================================ */

/* ------------------------------------------------
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ------------------------------------------------ */
:root {
  /* CUSTOMIZE: Primary accent color */
  --clr-accent: #6366f1;
  --clr-accent-2: #8b5cf6;
  --clr-accent-3: #06b6d4;
  --clr-accent-grad: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
  --clr-accent-grad-r: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 50%, #6366f1 100%);

  /* Dark theme (default) */
  --bg-primary: #0a0a14;
  --bg-secondary: #0f0f1e;
  --bg-card: #161628;
  --bg-card-hover: #1c1c36;
  --border: rgba(99, 102, 241, 0.15);
  --border-strong: rgba(99, 102, 241, 0.3);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --shadow: 0 4px 32px rgba(0,0,0,0.5);
  --shadow-hover: 0 8px 48px rgba(99,102,241,0.2);
  --shadow-glow: 0 0 40px rgba(99,102,241,0.15);
  --nav-bg: rgba(10, 10, 20, 0.82);
  --glass: rgba(22, 22, 40, 0.6);

  /* Typography */
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-code: 'Fira Code', monospace;

  /* Spacing */
  --section-py: 7rem 0;
  --container-max: 1200px;
  --radius: 16px;
  --radius-sm: 10px;

  /* Transitions */
  --trans: 0.3s ease;
  --trans-slow: 0.5s ease;
}

/* Light theme */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --border: rgba(99, 102, 241, 0.12);
  --border-strong: rgba(99, 102, 241, 0.25);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-hover: 0 8px 40px rgba(99,102,241,0.15);
  --shadow-glow: 0 0 40px rgba(99,102,241,0.08);
  --nav-bg: rgba(248, 250, 252, 0.88);
  --glass: rgba(255, 255, 255, 0.6);
}

/* ------------------------------------------------
   2. RESET & BASE
   ------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 70px;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background var(--trans), color var(--trans);
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; font-family: var(--font-body); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ------------------------------------------------
   3. SCROLLBAR
   ------------------------------------------------ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
  background: var(--clr-accent-grad);
  border-radius: 3px;
}

/* ------------------------------------------------
   4. LOADING SCREEN
   ------------------------------------------------ */
#loader {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }

.loader-inner { text-align: center; }

.loader-logo {
  font-size: 3rem;
  font-weight: 900;
  background: var(--clr-accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.5rem;
  letter-spacing: -2px;
}

.loader-spinner {
  width: 48px;
  height: 48px;
  margin: 0 auto 1.5rem;
}
.loader-spinner svg { width: 100%; height: 100%; }

.loader-bar {
  width: 200px;
  height: 3px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  margin: 0 auto;
}

.loader-fill {
  height: 100%;
  background: var(--clr-accent-grad);
  border-radius: 3px;
  animation: loadFill 2s ease forwards;
}

@keyframes loadFill {
  0% { width: 0%; }
  60% { width: 70%; }
  100% { width: 100%; }
}

/* ------------------------------------------------
   5. TOAST NOTIFICATION
   ------------------------------------------------ */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  z-index: 10000;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* ------------------------------------------------
   6. NAVIGATION
   ------------------------------------------------ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--trans), box-shadow var(--trans), background var(--trans);
}
#navbar.scrolled {
  border-color: var(--border);
  box-shadow: 0 1px 24px rgba(0,0,0,0.2);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-logo { display: flex; align-items: center; }
.logo-text {
  font-size: 1.35rem;
  font-weight: 900;
  background: var(--clr-accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
  transition: transform var(--trans);
}
.nav-logo:hover .logo-text { transform: scale(1.05); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-link {
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--trans), background var(--trans);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--clr-accent-grad);
  border-radius: 2px;
  transition: width var(--trans), left var(--trans);
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}
.nav-link:hover::after, .nav-link.active::after {
  width: 60%;
  left: 20%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--trans), background var(--trans), border-color var(--trans), transform var(--trans);
}
#theme-toggle:hover { color: var(--clr-accent); transform: rotate(20deg); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--trans), opacity var(--trans);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 1rem 2rem 1.5rem;
  flex-direction: column;
  gap: 0.25rem;
}
.mobile-menu.open { display: flex; }
.mobile-link {
  display: block;
  padding: 0.7rem 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: color var(--trans), background var(--trans);
}
.mobile-link:hover { color: var(--text-primary); background: var(--border); }

/* ------------------------------------------------
   7. HERO
   ------------------------------------------------ */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 5rem 2rem 3rem;
}

/* Animated gradient background */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 30%, rgba(99,102,241,0.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 70%, rgba(139,92,246,0.14) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 60% 10%, rgba(6,182,212,0.1) 0%, transparent 60%);
  animation: heroBg 8s ease-in-out infinite alternate;
  pointer-events: none;
}
#hero::after {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99,102,241,0.06) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  animation: heroPulse 4s ease-in-out infinite;
}

@keyframes heroBg {
  0% { transform: scale(1) rotate(0deg); opacity: 0.8; }
  100% { transform: scale(1.15) rotate(2deg); opacity: 1; }
}
@keyframes heroPulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.4; }
  50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.7; }
}

#particles-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5rem;
  max-width: var(--container-max);
  width: 100%;
  position: relative;
  z-index: 1;
}

/* Photo */
.hero-photo {
  flex-shrink: 0;
  position: relative;
  width: 240px;
  height: 240px;
}
.photo-ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: var(--clr-accent-grad);
  animation: spin 6s linear infinite;
  mask-image: conic-gradient(transparent 50deg, black 120deg);
  -webkit-mask-image: conic-gradient(transparent 50deg, black 120deg);
}
.photo-glow {
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  background: var(--clr-accent-grad);
  opacity: 0.15;
  filter: blur(30px);
  animation: heroPulse 4s ease-in-out infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.photo-initials {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg-card);
  border: 4px solid var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}
.photo-initials span {
  font-size: 4rem;
  font-weight: 900;
  background: var(--clr-accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -2px;
}
.photo-initials img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* Hero text */
.hero-text { max-width: 560px; }

.hero-greeting {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--clr-accent);
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
  font-family: var(--font-code);
  opacity: 0.85;
}

.hero-name {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--clr-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-role {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 600;
  color: var(--text-secondary);
  min-height: 2em;
  margin-bottom: 1.2rem;
  font-family: var(--font-code);
}
.typed-text { color: var(--clr-accent); }
.cursor {
  display: inline-block;
  color: var(--clr-accent);
  animation: blink 0.9s step-end infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero-bio {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.hero-socials {
  display: flex;
  gap: 0.75rem;
}
.hero-socials a {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.15rem;
  transition: color var(--trans), background var(--trans), transform var(--trans), border-color var(--trans), box-shadow var(--trans);
}
.hero-socials a:hover {
  color: var(--clr-accent);
  transform: translateY(-4px);
  border-color: var(--clr-accent);
  box-shadow: 0 4px 16px rgba(99,102,241,0.25);
}

/* Scroll indicator – mouse animation */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}
.scroll-mouse {
  width: 26px;
  height: 42px;
  border: 2px solid var(--text-muted);
  border-radius: 13px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
  transition: border-color var(--trans);
}
.scroll-indicator:hover .scroll-mouse { border-color: var(--clr-accent); }
.scroll-wheel {
  width: 4px;
  height: 8px;
  background: var(--clr-accent);
  border-radius: 2px;
  animation: scrollWheel 2s ease-in-out infinite;
}
@keyframes scrollWheel {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(12px); opacity: 0; }
}

/* ------------------------------------------------
   8. SHARED SECTION UTILITIES
   ------------------------------------------------ */
section { padding: var(--section-py); }
.section-alt { background: var(--bg-secondary); }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-code);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--clr-accent);
  background: rgba(99,102,241,0.08);
  border: 1px solid rgba(99,102,241,0.18);
  border-radius: 100px;
  padding: 0.35rem 1.1rem;
  margin-bottom: 0.75rem;
  letter-spacing: 0.04em;
}
.section-tag i { font-size: 0.75rem; }
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.5px;
}

/* ------------------------------------------------
   9. BUTTONS
   ------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: transform var(--trans), box-shadow var(--trans), background var(--trans), border-color var(--trans);
  border: 2px solid transparent;
  font-family: var(--font-body);
}
.btn:focus-visible { outline: 2px solid var(--clr-accent); outline-offset: 3px; }

.btn-primary {
  background: var(--clr-accent-grad);
  color: #fff;
  border-color: transparent;
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(99,102,241,0.4);
}

.btn-outline {
  background: transparent;
  color: var(--clr-accent);
  border-color: var(--clr-accent);
}
.btn-outline:hover {
  background: rgba(99,102,241,0.08);
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(99,102,241,0.2);
}

.btn-full { width: 100%; justify-content: center; }

/* ------------------------------------------------
   10. ABOUT
   ------------------------------------------------ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-story p {
  color: var(--text-secondary);
  margin-bottom: 1.1rem;
  font-size: 0.97rem;
}
.about-story strong { color: var(--text-primary); }

.edu-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.35rem;
  transition: border-color var(--trans), box-shadow var(--trans);
}
.edu-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-glow);
}
.edu-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(99,102,241,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-accent);
  font-size: 1.3rem;
  flex-shrink: 0;
}
.edu-info h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 0.2rem; }
.edu-info p { font-size: 0.85rem; color: var(--text-secondary); }

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  text-align: center;
  transition: transform var(--trans), box-shadow var(--trans), border-color var(--trans);
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--clr-accent-grad);
  opacity: 0;
  transition: opacity var(--trans);
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-strong);
}
.stat-card:hover::before { opacity: 1; }

.stat-number {
  display: block;
  font-size: 2.6rem;
  font-weight: 900;
  background: var(--clr-accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.35rem;
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }

/* Interests */
.interests-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.interests-title i { color: var(--clr-accent); font-size: 0.9rem; }
.interests-grid { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.interest-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.45rem 0.9rem;
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: border-color var(--trans), color var(--trans), transform var(--trans);
}
.interest-badge:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  transform: translateY(-2px);
}

/* ------------------------------------------------
   11. SKILLS
   ------------------------------------------------ */
.skill-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}
.filter-btn {
  padding: 0.5rem 1.2rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  font-family: var(--font-body);
  transition: color var(--trans), background var(--trans), border-color var(--trans), transform var(--trans);
}
.filter-btn:hover { color: var(--clr-accent); border-color: var(--clr-accent); transform: translateY(-2px); }
.filter-btn.active {
  background: var(--clr-accent-grad);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(99,102,241,0.3);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.3rem;
  transition: opacity var(--trans), transform var(--trans), border-color var(--trans), box-shadow var(--trans);
  display: flex;
  align-items: center;
  gap: 1rem;
}
.skill-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}
.skill-card.hidden { display: none; }

.skill-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(99,102,241,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-accent);
  font-size: 1.2rem;
  flex-shrink: 0;
  transition: background var(--trans);
}
.skill-card:hover .skill-icon-wrap {
  background: rgba(99,102,241,0.18);
}

.skill-info { flex: 1; min-width: 0; }

.skill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
}
.skill-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}
.skill-pct {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--clr-accent);
  font-family: var(--font-code);
}

.skill-bar {
  height: 6px;
  background: var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.skill-fill {
  height: 100%;
  width: 0;
  background: var(--clr-accent-grad);
  border-radius: 6px;
  transition: width 1.2s cubic-bezier(0.4,0,0.2,1);
}
.skill-fill.animated { width: var(--pct); }

/* ------------------------------------------------
   12. EXPERIENCE TIMELINE
   ------------------------------------------------ */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 2.5rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--clr-accent), var(--clr-accent-2), var(--clr-accent-3));
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -3.05rem;
  top: 1.5rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--clr-accent);
  box-shadow: 0 0 0 4px rgba(99,102,241,0.2);
  z-index: 1;
}
.timeline-pulse {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--clr-accent);
  animation: timelinePulse 2s ease-in-out infinite;
}
@keyframes timelinePulse {
  0%,100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.8); opacity: 0; }
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  transition: transform var(--trans), box-shadow var(--trans), border-color var(--trans);
}
.timeline-card:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-strong);
}

.timeline-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.company-info { display: flex; align-items: center; gap: 0.85rem; }
.company-logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(99,102,241,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-accent);
  font-size: 1.3rem;
  flex-shrink: 0;
}
.timeline-role { font-size: 1rem; font-weight: 700; margin-bottom: 0.15rem; }
.timeline-company { font-size: 0.85rem; color: var(--clr-accent); font-weight: 600; }

.timeline-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.25rem;
}
.timeline-meta span {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.timeline-bullets {
  padding-left: 1.25rem;
  margin-bottom: 0.75rem;
}
.timeline-bullets li {
  list-style: disc;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  line-height: 1.6;
}
.timeline-bullets strong { color: var(--text-primary); }

.read-more-btn {
  background: none;
  border: none;
  color: var(--clr-accent);
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0;
  transition: gap var(--trans);
}
.read-more-btn:hover { gap: 0.6rem; }
.read-more-btn i { transition: transform var(--trans); }
.read-more-btn[aria-expanded="true"] i { transform: rotate(180deg); }

.extra-details {
  margin-top: 0.75rem;
  padding: 0.85rem 1.1rem;
  background: rgba(99,102,241,0.06);
  border-left: 3px solid var(--clr-accent);
  border-radius: 0 8px 8px 0;
  font-size: 0.87rem;
  color: var(--text-secondary);
  line-height: 1.7;
  animation: slideDown 0.3s ease;
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ------------------------------------------------
   13. PROJECTS
   ------------------------------------------------ */
.proj-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.proj-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--trans), box-shadow var(--trans), border-color var(--trans);
}
.proj-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-strong);
}
.proj-card.hidden { display: none; }

.proj-img {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-secondary);
}
.proj-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--trans-slow);
}
.proj-card:hover .proj-img img { transform: scale(1.08); }

.proj-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 20, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  opacity: 0;
  transition: opacity var(--trans);
  backdrop-filter: blur(4px);
}
.proj-card:hover .proj-overlay { opacity: 1; }

.overlay-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: rgba(99,102,241,0.9);
  border: 1px solid rgba(99,102,241,0.5);
  font-family: var(--font-body);
  transition: background var(--trans), transform var(--trans);
  transform: translateY(8px);
}
.proj-card:hover .overlay-btn { transform: translateY(0); }
.overlay-btn:hover { background: var(--clr-accent); }

.overlay-btn-details {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
}
.overlay-btn-details:hover { background: rgba(255,255,255,0.2); }

.proj-body { padding: 1.25rem 1.5rem; }
.proj-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.5rem; }
.proj-desc {
  font-size: 0.87rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.85rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.proj-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  background: rgba(99,102,241,0.1);
  color: var(--clr-accent);
  border: 1px solid rgba(99,102,241,0.15);
  letter-spacing: 0.02em;
}

/* ------------------------------------------------
   14. PROJECT MODAL
   ------------------------------------------------ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}
.modal[hidden] { display: none; }

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
}

.modal-content {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  max-width: 680px;
  width: 100%;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0,0,0,0.4);
  animation: modalIn 0.3s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(16px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0,0,0,0.4);
  border: none;
  color: #fff;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  transition: background var(--trans), transform var(--trans);
}
.modal-close:hover { background: rgba(0,0,0,0.7); transform: rotate(90deg); }

.modal-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-secondary);
}
.modal-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-body { padding: 1.75rem 2rem; }
.modal-title { font-size: 1.4rem; font-weight: 800; margin-bottom: 0.75rem; }
.modal-desc {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}
.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}
.modal-actions { display: flex; gap: 0.75rem; }

/* ------------------------------------------------
   15. CONTACT
   ------------------------------------------------ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-intro {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  text-align: left;
  transition: border-color var(--trans), box-shadow var(--trans), transform var(--trans);
  width: 100%;
}
button.contact-item { cursor: pointer; }
button.contact-item:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-glow);
  transform: translateX(4px);
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(99,102,241,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-accent);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-item-text {
  flex: 1;
  min-width: 0;
}
.contact-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.1rem;
}
.contact-value {
  font-size: 0.92rem;
  font-weight: 600;
}

.copy-icon {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--trans);
}
button.contact-item:hover .copy-icon { color: var(--clr-accent); }

.contact-socials {
  display: flex;
  gap: 0.75rem;
}
.social-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--trans), border-color var(--trans), background var(--trans), transform var(--trans);
}
.social-btn:hover {
  color: var(--clr-accent);
  border-color: var(--clr-accent);
  transform: translateY(-3px);
}

/* ------------------------------------------------
   16. CONTACT FORM
   ------------------------------------------------ */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.25rem;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}
.form-group label span { color: var(--clr-accent); }

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  transition: border-color var(--trans), box-shadow var(--trans);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}
.form-group textarea { resize: vertical; min-height: 120px; }

.form-group input.error,
.form-group textarea.error {
  border-color: #ef4444;
}

.form-error {
  display: block;
  font-size: 0.78rem;
  color: #ef4444;
  margin-top: 0.3rem;
  min-height: 1.1em;
}

#form-status {
  text-align: center;
  margin-top: 0.75rem;
  font-size: 0.9rem;
  font-weight: 500;
}
#form-status.success { color: #10b981; }
#form-status.error { color: #ef4444; }

/* ------------------------------------------------
   17. FOOTER
   ------------------------------------------------ */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}

.footer-content {
  text-align: center;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 900;
  background: var(--clr-accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
  letter-spacing: -1px;
}

.footer-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}
.footer-text i { color: #ef4444; }

.footer-socials {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
}
.footer-socials a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1rem;
  transition: color var(--trans), border-color var(--trans), transform var(--trans);
}
.footer-socials a:hover {
  color: var(--clr-accent);
  border-color: var(--clr-accent);
  transform: translateY(-3px);
}

/* ------------------------------------------------
   18. BACK TO TOP
   ------------------------------------------------ */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--clr-accent-grad);
  color: #fff;
  border: none;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--trans), visibility var(--trans), transform var(--trans), box-shadow var(--trans);
  box-shadow: 0 4px 20px rgba(99,102,241,0.3);
}
#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
#back-to-top:hover {
  box-shadow: 0 8px 32px rgba(99,102,241,0.5);
  transform: translateY(-3px);
}

/* ------------------------------------------------
   19. RESPONSIVE
   ------------------------------------------------ */

/* Tablet */
@media (max-width: 1024px) {
  .hero-content { gap: 3rem; }
  .hero-photo { width: 200px; height: 200px; }
  .about-grid { gap: 2.5rem; }
  .contact-grid { gap: 2.5rem; }
}

/* Tablet – Stacked */
@media (max-width: 768px) {
  :root { --section-py: 5rem 0; }

  .nav-links { display: none; }
  .hamburger { display: flex; }

  .hero-content {
    flex-direction: column;
    text-align: center;
  }
  .hero-text { max-width: 100%; }
  .hero-cta { justify-content: center; }
  .hero-socials { justify-content: center; }
  .hero-photo { width: 180px; height: 180px; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .timeline { padding-left: 2rem; }
  .timeline-dot { left: -2.55rem; }
  .timeline-header { flex-direction: column; }
  .timeline-meta { align-items: flex-start; }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .modal-content { margin: 1rem; }
  .modal-body { padding: 1.25rem 1.5rem; }
}

/* Mobile */
@media (max-width: 480px) {
  :root { --section-py: 4rem 0; }

  .container { padding: 0 1.25rem; }
  .nav-container { padding: 0 1.25rem; }

  .hero-photo { width: 150px; height: 150px; }
  .photo-initials span { font-size: 3rem; }

  .hero-name { letter-spacing: -1px; }

  .stats-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .stat-card { padding: 1.1rem 0.85rem; }
  .stat-number { font-size: 2rem; }

  .skill-filters { gap: 0.35rem; }
  .filter-btn { padding: 0.4rem 0.9rem; font-size: 0.8rem; }

  .proj-filters { gap: 0.35rem; }

  .contact-form { padding: 1.5rem 1.25rem; }
  .btn { padding: 0.65rem 1.25rem; font-size: 0.9rem; }

  #back-to-top {
    width: 42px;
    height: 42px;
    bottom: 1.5rem;
    right: 1.5rem;
  }
}

/* ------------------------------------------------
   20. LANGUAGE SWITCHER
   ------------------------------------------------ */
.lang-switcher {
  position: relative;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  transition: border-color var(--trans), background var(--trans), box-shadow var(--trans), transform var(--trans);
  min-width: 78px;
  justify-content: center;
}
.lang-toggle:hover {
  border-color: var(--clr-accent);
  box-shadow: 0 0 16px rgba(99,102,241,0.15);
  transform: translateY(-1px);
}

.lang-flag {
  font-size: 1.15rem;
  line-height: 1;
  display: flex;
  align-items: center;
}

.lang-code {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.lang-arrow {
  font-size: 0.6rem;
  color: var(--text-muted);
  transition: transform 0.25s ease, color var(--trans);
  margin-left: 0.1rem;
}
.lang-switcher.open .lang-arrow {
  transform: rotate(180deg);
  color: var(--clr-accent);
}

/* Dropdown */
.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.97);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  z-index: 1100;
  padding: 0.35rem;
  overflow: hidden;
}
.lang-switcher.open .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.85rem;
  border: none;
  background: transparent;
  width: 100%;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  font-family: var(--font-body);
  cursor: pointer;
  border-radius: 8px;
  transition: background var(--trans), color var(--trans), transform var(--trans);
}
.lang-option:hover {
  background: rgba(99,102,241,0.08);
  color: var(--text-primary);
}

.lang-opt-flag {
  font-size: 1.25rem;
  line-height: 1;
  display: flex;
  align-items: center;
}

.lang-opt-text {
  flex: 1;
  text-align: left;
}

.lang-check {
  font-size: 0.75rem;
  color: var(--clr-accent);
  opacity: 0;
  transform: scale(0.5);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.lang-option.active .lang-check {
  opacity: 1;
  transform: scale(1);
}

.lang-option.active {
  background: rgba(99,102,241,0.12);
  color: var(--clr-accent);
  font-weight: 700;
}

/* Fade animation for translated content */
[data-translate].lang-fade,
[data-translate-html].lang-fade,
[data-translate-ph].lang-fade {
  animation: langFadeIn 0.35s ease forwards;
}

@keyframes langFadeIn {
  from { opacity: 0; transform: translateY(3px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ------------------------------------------------
   21. UTILITY ANIMATIONS
   ------------------------------------------------ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}