/* ══════════════════════════════════════════════════════════════
   ADARSH KUMAR SAHU — PORTFOLIO STYLES
   Premium Dark/Light Theme | Cormorant + DM Mono + Cabinet
══════════════════════════════════════════════════════════════ */

/* ─── CSS CUSTOM PROPERTIES ─────────────────────────────────── */
:root {
  /* Dark theme (default) */
  --bg-primary:    #0a0a0f;
  --bg-secondary:  #111118;
  --bg-card:       #13131c;
  --bg-card-hover: #18182a;
  --border:        rgba(255,255,255,0.07);
  --border-accent: rgba(200,163,93,0.3);

  --text-primary:   #f0ede8;
  --text-secondary: #a09b92;
  --text-muted:     #5a5750;

  --gold:         #c8a35d;
  --gold-light:   #e0c07a;
  --gold-dim:     rgba(200,163,93,0.15);
  --gold-glow:    rgba(200,163,93,0.25);

  --accent:       #7b8cde;
  --accent-dim:   rgba(123,140,222,0.15);

  --success:      #4caf86;
  --error:        #e07070;

  /* Fonts */
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Cabinet Grotesk', system-ui, sans-serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;

  /* Spacing */
  --section-py: 8rem;
  --container-px: 2rem;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Transitions */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows */
  --shadow-card: 0 4px 32px rgba(0,0,0,0.4);
  --shadow-gold:  0 0 40px rgba(200,163,93,0.12);
}

[data-theme="light"] {
  --bg-primary:    #f8f6f2;
  --bg-secondary:  #f0ede8;
  --bg-card:       #ffffff;
  --bg-card-hover: #f8f5f0;
  --border:        rgba(0,0,0,0.08);
  --border-accent: rgba(160,100,30,0.25);

  --text-primary:   #1a1a24;
  --text-secondary: #5a5550;
  --text-muted:     #999090;

  --gold:         #a0660a;
  --gold-light:   #c08020;
  --gold-dim:     rgba(160,102,10,0.1);
  --gold-glow:    rgba(160,102,10,0.15);

  --accent:       #4a5abf;
  --accent-dim:   rgba(74,90,191,0.1);

  --shadow-card: 0 4px 32px rgba(0,0,0,0.08);
  --shadow-gold:  0 0 40px rgba(160,102,10,0.08);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; }
ul { list-style: none; }

/* Selection */
::selection { background: var(--gold); color: #0a0a0f; }

/* ─── CUSTOM CURSOR ──────────────────────────────────────────── */
.cursor-dot,
.cursor-ring {
  display: none;
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 9999;
  border-radius: 50%;
  transition: opacity 0.3s;
}

@media (hover: hover) {
  .cursor-dot {
    display: block;
    width: 6px; height: 6px;
    background: var(--gold);
    transform: translate(-50%, -50%);
  }
  .cursor-ring {
    display: block;
    width: 36px; height: 36px;
    border: 1.5px solid var(--gold);
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s, border-color 0.3s;
    opacity: 0.5;
  }
  .cursor-ring.hovering {
    width: 56px; height: 56px;
    opacity: 1;
    border-color: var(--gold-light);
  }
}

/* ─── LOADER ─────────────────────────────────────────────────── */
#loader {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

#loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

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

.loader-letters {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 300;
  color: var(--gold);
  opacity: 0;
  display: inline-block;
  animation: loaderLetterIn 0.5s ease forwards;
  letter-spacing: 0.3em;
}
.loader-letters:nth-child(1) { animation-delay: 0.1s; }
.loader-letters:nth-child(2) { animation-delay: 0.2s; }
.loader-letters:nth-child(3) { animation-delay: 0.3s; }

.loader-bar {
  width: 120px;
  height: 2px;
  background: var(--border);
  margin: 1.5rem auto 0;
  border-radius: 2px;
  overflow: hidden;
}

.loader-bar-fill {
  height: 100%;
  background: var(--gold);
  width: 0;
  animation: loaderFill 1.2s ease 0.5s forwards;
}

@keyframes loaderLetterIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes loaderFill {
  to { width: 100%; }
}

/* ─── CONTAINER ──────────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-px);
}

/* ─── NAVBAR ─────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: background-color 0.4s ease, backdrop-filter 0.4s ease, padding 0.3s ease, border-bottom 0.3s ease;
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 0;
}

[data-theme="light"] .navbar.scrolled {
  background: rgba(248, 246, 242, 0.88);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--gold);
  letter-spacing: 0.1em;
  margin-right: auto;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  font-size: 1rem;
  transition: border-color var(--transition), color var(--transition), transform 0.3s;
}

.theme-toggle:hover {
  border-color: var(--gold);
  color: var(--gold);
  transform: rotate(20deg);
}

.theme-icon { line-height: 1; }
[data-theme="dark"] .sun { display: block; }
[data-theme="dark"] .moon { display: none; }
[data-theme="light"] .sun { display: none; }
[data-theme="light"] .moon { display: block; }

.btn-resume {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--gold);
  border-radius: var(--radius-sm);
  color: var(--gold);
  transition: background var(--transition), color var(--transition);
}
.btn-resume:hover {
  background: var(--gold);
  color: #0a0a0f;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s, width 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}
.mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}
.mobile-menu ul { text-align: center; }
.mobile-menu li { margin: 1.5rem 0; }
.mob-link {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 300;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.mob-link:hover { color: var(--gold); }

/* ─── SECTION SHARED ─────────────────────────────────────────── */
.section {
  padding: var(--section-py) 0;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--gold);
}

.section-header {
  max-width: 600px;
  margin-bottom: 4rem;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 300;
  line-height: 1.1;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.section-heading em {
  font-style: italic;
  color: var(--gold);
}

/* ─── REVEAL ANIMATIONS ──────────────────────────────────────── */
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 0;
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-up    { transform: translateY(40px); }
.reveal-left  { transform: translateX(-40px); }
.reveal-right { transform: translateX(40px); }

.reveal-up.visible,
.reveal-left.visible,
.reveal-right.visible {
  opacity: 1;
  transform: translate(0, 0);
}

/* Delay support */
[data-delay="100"] { transition-delay: 0.1s; }
[data-delay="150"] { transition-delay: 0.15s; }
[data-delay="200"] { transition-delay: 0.2s; }
[data-delay="300"] { transition-delay: 0.3s; }

/* ─── BUTTONS ────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--gold);
  color: #0a0a0f;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform 0.2s, box-shadow var(--transition);
  letter-spacing: 0.02em;
}
.btn-primary:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--gold-glow);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 0.85rem 0;
  transition: color var(--transition), gap var(--transition);
  border-bottom: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--gold);
  gap: 1rem;
  border-color: var(--gold);
}

/* ─── DOT PULSE ──────────────────────────────────────────────── */
.dot-pulse {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--success);
  position: relative;
}
.dot-pulse::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s ease infinite;
}
.dot-pulse.sm { width: 6px; height: 6px; }

@keyframes pulse {
  0%   { transform: scale(1); opacity: 0.8; }
  70%  { transform: scale(2.5); opacity: 0; }
  100% { transform: scale(1); opacity: 0; }
}

/* ══════════════════════════════════════════════════════════════
   HERO
══════════════════════════════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 6rem;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200,163,93,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,163,93,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 80%);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.hero-orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(200,163,93,0.12) 0%, transparent 70%);
  top: -100px; right: -100px;
  animation: orbFloat 8s ease-in-out infinite;
}
.hero-orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(123,140,222,0.08) 0%, transparent 70%);
  bottom: -50px; left: -100px;
  animation: orbFloat 10s ease-in-out infinite reverse;
}

@keyframes orbFloat {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-30px); }
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 4rem var(--container-px);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  padding: 0.4rem 1rem;
  border-radius: 100px;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 11vw, 9rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero-name-first { color: var(--text-primary); }
.hero-name-last  {
  color: var(--gold);
  font-style: italic;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 2vw, 1rem);
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.role-prefix { color: var(--gold); }
.typed-text  { color: var(--text-primary); }

.type-cursor {
  color: var(--gold);
  animation: blink 0.9s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: 2.5rem;
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  padding: 0 2rem;
  gap: 0.25rem;
}
.stat-item:first-child { padding-left: 0; }

.stat-num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 600;
  color: var(--gold);
  line-height: 1;
}
.stat-suffix {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--gold);
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  right: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.hero-scroll-hint span {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  writing-mode: vertical-lr;
}
.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--gold), transparent);
  animation: scrollLine 1.5s ease-in-out infinite;
}
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  50.01% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ══════════════════════════════════════════════════════════════
   ABOUT
══════════════════════════════════════════════════════════════ */
.about { background: var(--bg-secondary); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-body {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
}
.about-body strong { color: var(--text-primary); font-weight: 700; }

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  color: var(--gold);
  background: var(--gold-dim);
  transition: background var(--transition), border-color var(--transition);
}
.tag:hover {
  background: rgba(200,163,93,0.25);
  border-color: var(--gold);
}

/* About card */
.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.about-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-gold);
}

.about-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.about-avatar {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--gold-dim);
  border: 1.5px solid var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gold);
  letter-spacing: 0.1em;
  font-weight: 500;
  flex-shrink: 0;
}

.about-card-name {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 0.2rem;
}
.about-card-role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.about-card-stats { margin-bottom: 1.5rem; }

.card-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
}
.card-stat:last-child { border: none; }

.card-stat-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}
.card-stat-value {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.status-open { color: var(--success); font-weight: 600; }

.about-card-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.card-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  transition: color var(--transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.card-link:hover { color: var(--gold); }

/* ══════════════════════════════════════════════════════════════
   SKILLS
══════════════════════════════════════════════════════════════ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.skill-category:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-gold);
}

.skill-cat-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}
.skill-cat-title {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.skill-bars { display: flex; flex-direction: column; gap: 1rem; }

.skill-bar-item {}

.skill-bar-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.skill-bar-track {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  border-radius: 2px;
  width: 0;
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Tools strip */
.tools-strip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.tools-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.tools-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.4rem 1rem;
  background: var(--accent-dim);
  border: 1px solid rgba(123,140,222,0.2);
  border-radius: 100px;
  color: var(--accent);
  transition: background var(--transition), border-color var(--transition), transform 0.2s;
}
.chip:hover {
  background: rgba(123,140,222,0.25);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* ══════════════════════════════════════════════════════════════
   PROJECTS
══════════════════════════════════════════════════════════════ */
.projects { background: var(--bg-secondary); }

/* Filter bar */
.filter-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 1.25rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all var(--transition);
}
.filter-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}
.filter-btn.active {
  background: var(--gold);
  border-color: var(--gold);
  color: #0a0a0f;
}

/* Projects grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--gold-dim) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}
.project-card:hover::before { opacity: 1; }

.project-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-gold);
}

.project-card.hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.95);
}

.project-card.featured {
  border-color: var(--border-accent);
  background: linear-gradient(135deg, var(--bg-card), rgba(200,163,93,0.05));
}

.featured-badge {
  position: absolute;
  top: 1rem; right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--gold);
  color: #0a0a0f;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  font-weight: 700;
}

.project-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.project-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 300;
  color: var(--border);
  line-height: 1;
  transition: color var(--transition);
}
.project-card:hover .project-number { color: var(--gold-dim); }

.project-status {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  border: 1px solid;
}
.project-status.ongoing {
  color: var(--success);
  border-color: var(--success);
  background: rgba(76,175,134,0.08);
}
.project-status.completed {
  color: var(--text-muted);
  border-color: var(--border);
}

.project-title {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  position: relative;
  z-index: 1;
}

.project-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  position: relative;
  z-index: 1;
}

.project-highlights {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  position: relative;
  z-index: 1;
}
.project-highlights span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  position: relative;
  z-index: 1;
}

.stack-chip {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition);
}
.project-card:hover .stack-chip {
  color: var(--gold);
  border-color: var(--border-accent);
}

.project-card-footer {
  display: flex;
  justify-content: flex-end;
  position: relative;
  z-index: 1;
}
.project-year {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

/* ══════════════════════════════════════════════════════════════
   EXPERIENCE
══════════════════════════════════════════════════════════════ */
.experience { background: var(--bg-primary); }

.timeline {
  position: relative;
  max-width: 800px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 0.3rem;
}

.timeline-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--gold);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 2px var(--gold);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.timeline-dot.secondary {
  background: var(--bg-primary);
  box-shadow: 0 0 0 2px var(--border);
}

.timeline-line {
  width: 1px;
  flex: 1;
  background: linear-gradient(to bottom, var(--gold), var(--border));
  margin-top: 0.5rem;
  min-height: 60px;
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.timeline-content:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-gold);
}

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

.timeline-role {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.timeline-company {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gold);
  letter-spacing: 0.05em;
}
.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  white-space: nowrap;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 100px;
}

.timeline-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.timeline-bullets {
  list-style: none;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.timeline-bullets li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.6;
}
.timeline-bullets li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-size: 0.75rem;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.timeline-tags span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 0.25rem 0.75rem;
  background: var(--gold-dim);
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  color: var(--gold);
  letter-spacing: 0.05em;
}

/* ══════════════════════════════════════════════════════════════
   EDUCATION & ACHIEVEMENTS
══════════════════════════════════════════════════════════════ */
.education { background: var(--bg-secondary); }

.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.25rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.edu-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-gold);
}

.edu-icon { font-size: 2rem; }

.edu-degree {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}
.edu-institution {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.15rem;
}
.edu-location {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.edu-year {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gold);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

/* Achievements */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.achievement-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: border-color var(--transition), transform var(--transition);
}
.achievement-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
}

.achievement-icon { font-size: 1.75rem; flex-shrink: 0; }

.achievement-title {
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}
.achievement-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ══════════════════════════════════════════════════════════════
   CONTACT
══════════════════════════════════════════════════════════════ */
.contact { background: var(--bg-primary); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

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

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.contact-info-item:hover { color: var(--gold); }

.contact-info-icon {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: var(--gold-dim);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  flex-shrink: 0;
}

/* Social */
.social-links {
  display: flex;
  gap: 0.75rem;
}

.social-link {
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  transition: all var(--transition);
}
.social-link:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: var(--gold-dim);
  transform: translateY(-3px);
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
  outline: none;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px var(--gold-dim);
}

.form-submit {
  width: 100%;
  justify-content: center;
  font-size: 0.95rem;
  padding: 1rem;
  position: relative;
  overflow: hidden;
}

.form-success {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--success);
  padding: 0.75rem 1rem;
  background: rgba(76,175,134,0.1);
  border: 1px solid rgba(76,175,134,0.3);
  border-radius: var(--radius-sm);
  text-align: center;
}
.form-success.show { display: block; }

/* ══════════════════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════════════════ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--gold);
  letter-spacing: 0.1em;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

.footer-back-top {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--transition);
  border: 1px solid var(--border);
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
}
.footer-back-top:hover {
  color: var(--gold);
  border-color: var(--gold);
}

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .skills-grid   { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --section-py: 5rem; }

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

  .hero-content { padding: 2rem var(--container-px); }

  .about-grid    { grid-template-columns: 1fr; gap: 3rem; }
  .contact-grid  { grid-template-columns: 1fr; gap: 3rem; }
  .edu-grid      { grid-template-columns: 1fr; }
  .skills-grid   { grid-template-columns: 1fr; }

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

  .timeline-item { grid-template-columns: 40px 1fr; gap: 1rem; }
  .timeline-header { flex-direction: column; gap: 0.5rem; }

  .hero-stats { gap: 0; }
  .stat-item { padding: 0 1rem; }
  .stat-item:first-child { padding-left: 0; }

  .edu-card {
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
  }
  .edu-year { grid-column: 2; }

  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-name { font-size: clamp(2.8rem, 15vw, 5rem); }
  .hero-stats { flex-wrap: wrap; gap: 1.5rem; }
  .stat-divider { display: none; }
  .stat-item { padding: 0; }
  .hero-ctas { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .contact-grid { gap: 2.5rem; }
}