/* ===== THEME SYSTEM ===== */
[data-theme="aurora"] {
  --bg: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #16161f;
  --primary: #FF6B6B;
  --secondary: #A855F7;
  --tertiary: #F59E0B;
  --accent: #34D399;
  --text: #FFFFFE;
  --muted: #A7A9BE;
  --muted-dim: #6B6D80;
  --particle-color: 255, 107, 107;
  --gradient: linear-gradient(135deg, #FF6B6B, #A855F7, #F59E0B);
}

[data-theme="ocean"] {
  --bg: #0a0f1a;
  --bg-secondary: #0f1628;
  --bg-card: #141d33;
  --primary: #06B6D4;
  --secondary: #3B82F6;
  --tertiary: #8B5CF6;
  --accent: #22D3EE;
  --text: #F0F9FF;
  --muted: #94A3B8;
  --muted-dim: #64748B;
  --particle-color: 6, 182, 212;
  --gradient: linear-gradient(135deg, #06B6D4, #3B82F6, #8B5CF6);
}

[data-theme="forest"] {
  --bg: #0a0f0a;
  --bg-secondary: #0f1a0f;
  --bg-card: #142014;
  --primary: #10B981;
  --secondary: #84CC16;
  --tertiary: #F59E0B;
  --accent: #6EE7B7;
  --text: #F0FDF4;
  --muted: #9CA38F;
  --muted-dim: #6B7A60;
  --particle-color: 16, 185, 129;
  --gradient: linear-gradient(135deg, #10B981, #84CC16, #F59E0B);
}

[data-theme="sunset"] {
  --bg: #0f0a0a;
  --bg-secondary: #1a0f10;
  --bg-card: #201416;
  --primary: #F43F5E;
  --secondary: #F97316;
  --tertiary: #EAB308;
  --accent: #FB923C;
  --text: #FFF7ED;
  --muted: #BEA39A;
  --muted-dim: #8B7068;
  --particle-color: 244, 63, 94;
  --gradient: linear-gradient(135deg, #F43F5E, #F97316, #EAB308);
}

/* ===== BASE STYLES ===== */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { transition: background-color 0.5s ease, color 0.5s ease; }

::selection {
  background: var(--primary);
  color: var(--bg);
}

/* ===== GRADIENT UTILITIES ===== */
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-bg {
  background: var(--gradient);
}

/* ===== CURSOR GLOW ===== */
#cursor-glow {
  background: radial-gradient(circle, rgba(var(--particle-color), 0.06) 0%, transparent 70%);
  transition: opacity 0.5s ease;
}

/* ===== HERO ===== */
.hero-mesh {
  background:
    radial-gradient(ellipse at 20% 50%, rgba(var(--particle-color), 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(var(--particle-color), 0.03) 0%, transparent 50%);
}

.hero-scroll-indicator {
  width: 24px;
  height: 40px;
  border-radius: 12px;
  border: 1.5px solid var(--muted-dim);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 8px;
}

.hero-scroll-dot {
  width: 3px;
  height: 8px;
  border-radius: 2px;
  background: var(--primary);
  animation: scroll-dot 2s ease-in-out infinite;
}

@keyframes scroll-dot {
  0%, 100% { opacity: 1; transform: translateY(0); }
  50% { opacity: 0.3; transform: translateY(12px); }
}

/* ===== SECTION BACKGROUNDS ===== */
.section-gradient {
  background: linear-gradient(180deg, transparent 0%, rgba(var(--particle-color), 0.02) 50%, transparent 100%);
}
.section-gradient-alt {
  background: linear-gradient(180deg, transparent 0%, rgba(var(--particle-color), 0.015) 50%, transparent 100%);
}

/* ===== NAVBAR ===== */
#navbar.scrolled {
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(16px) saturate(1.5);
  -webkit-backdrop-filter: blur(16px) saturate(1.5);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-link.active {
  color: var(--text);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}
.nav-link { position: relative; }

/* ===== CARDS ===== */
.project-card {
  transform-style: preserve-3d;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.project-card:hover {
  transform: translateY(-4px) rotateX(1deg);
  box-shadow: 0 20px 60px -12px rgba(var(--particle-color), 0.15);
}

.card-glow {
  background: linear-gradient(135deg, rgba(var(--particle-color), 0.05) 0%, transparent 50%, rgba(var(--particle-color), 0.03) 100%);
}
.card-glow-alt {
  background: linear-gradient(135deg, transparent 0%, rgba(var(--particle-color), 0.04) 50%, transparent 100%);
}

/* ===== TAGS ===== */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: all 0.2s ease;
}
.tag-primary { background: rgba(var(--particle-color), 0.08); color: var(--primary); border: 1px solid rgba(var(--particle-color), 0.15); }
.tag-secondary { background: rgba(var(--particle-color), 0.06); color: var(--secondary); border: 1px solid rgba(var(--particle-color), 0.12); }
.tag-tertiary { background: rgba(var(--particle-color), 0.06); color: var(--tertiary); border: 1px solid rgba(var(--particle-color), 0.12); }
.tag-accent { background: rgba(var(--particle-color), 0.06); color: var(--accent); border: 1px solid rgba(var(--particle-color), 0.12); }

/* ===== SKILL CHIPS ===== */
.skill-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.3s ease;
  cursor: default;
}
.chip-primary { background: rgba(var(--particle-color), 0.06); color: var(--primary); border: 1px solid rgba(var(--particle-color), 0.12); }
.chip-primary:hover { background: rgba(var(--particle-color), 0.12); box-shadow: 0 0 20px rgba(var(--particle-color), 0.15); transform: translateY(-1px); }
.chip-secondary { background: rgba(var(--particle-color), 0.05); color: var(--secondary); border: 1px solid rgba(var(--particle-color), 0.1); }
.chip-secondary:hover { background: rgba(var(--particle-color), 0.1); box-shadow: 0 0 20px rgba(var(--particle-color), 0.12); transform: translateY(-1px); }
.chip-tertiary { background: rgba(var(--particle-color), 0.05); color: var(--tertiary); border: 1px solid rgba(var(--particle-color), 0.1); }
.chip-tertiary:hover { background: rgba(var(--particle-color), 0.1); box-shadow: 0 0 20px rgba(var(--particle-color), 0.12); transform: translateY(-1px); }
.chip-accent { background: rgba(var(--particle-color), 0.05); color: var(--accent); border: 1px solid rgba(var(--particle-color), 0.1); }
.chip-accent:hover { background: rgba(var(--particle-color), 0.1); box-shadow: 0 0 20px rgba(var(--particle-color), 0.12); transform: translateY(-1px); }

/* ===== TIMELINE ===== */
.timeline-line {
  background: linear-gradient(180deg, var(--primary), var(--secondary), var(--tertiary));
  opacity: 0.25;
}

/* ===== ORBIT ANIMATION (HERO) ===== */
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes spin-reverse {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}
.animate-spin-slow { animation: spin-slow 30s linear infinite; }
.animate-spin-reverse { animation: spin-reverse 25s linear infinite; }

@keyframes pulse-subtle {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.9; }
}
.animate-pulse-subtle { animation: pulse-subtle 3s ease-in-out infinite; }

/* ===== FLOAT ANIMATIONS ===== */
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33% { transform: translateY(-10px) rotate(1deg); }
  66% { transform: translateY(5px) rotate(-1deg); }
}
@keyframes float-delayed {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33% { transform: translateY(8px) rotate(-1deg); }
  66% { transform: translateY(-12px) rotate(1deg); }
}
@keyframes float-slow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}
.animate-float { animation: float 6s ease-in-out infinite; }
.animate-float-delayed { animation: float-delayed 7s ease-in-out infinite; }
.animate-float-slow { animation: float-slow 9s ease-in-out infinite; }

/* ===== GRADIENT ANIMATION ===== */
@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
.animate-gradient-shift { animation: gradient-shift 4s ease infinite; }

/* ===== REVEAL ANIMATIONS ===== */
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-fade-in { animation: fade-in 0.8s ease both; }
.animate-fade-in-up { animation: fade-in-up 0.8s ease both; }
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ===== TYPING CURSOR ===== */
#typing-text::after {
  content: '|';
  animation: blink 1s step-end infinite;
  color: var(--primary);
  font-weight: 300;
}
@keyframes blink {
  50% { opacity: 0; }
}

/* ===== THEME DROPDOWN ===== */
#theme-dropdown {
  transition: opacity 0.2s ease, transform 0.2s ease;
}
#theme-dropdown.show {
  display: block;
  opacity: 1;
  transform: translateY(0);
}
.theme-option.active {
  background: rgba(var(--particle-color), 0.1);
  border-left: 2px solid var(--primary);
}

/* ===== MAGNETIC BUTTONS ===== */
.magnetic-btn {
  transition: transform 0.2s ease;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .orbit-ring, .orbit-node { display: none; }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--muted-dim); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }