/* ============================================================
   TANVI VERMA — FLUTTER DEVELOPER PORTFOLIO
   Theme  : White / Light + Dark Mode Toggle
   Accent : Soft Coral-Rose  #e8604c  (muted, professional)
   Fonts  : Clash Display (headings) · Satoshi (body) · JetBrains Mono
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,400&family=Nunito+Sans:ital,opsz,wght@0,6..12,300;0,6..12,400;0,6..12,500;0,6..12,600;0,6..12,700;1,6..12,400&family=JetBrains+Mono:wght@300;400;500;600&display=swap');

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

/* ══════════════════════════════════════════════════════════════
   DESIGN TOKENS — Light (default) + Dark
══════════════════════════════════════════════════════════════ */
:root {
  /* ── Brand Accent ── */
  --accent:         #e8604c;
  --accent-light:   #f0806f;
  --accent-dark:    #c94a38;
  --accent-faint:   rgba(232, 96, 76, 0.08);
  --accent-soft:    rgba(232, 96, 76, 0.14);
  --accent-glow:    rgba(232, 96, 76, 0.22);

  /* ── Gradient ── */
  --gradient:       linear-gradient(135deg, #e8604c 0%, #f0956a 100%);
  --gradient-soft:  linear-gradient(135deg, rgba(232,96,76,0.08) 0%, rgba(240,149,106,0.06) 100%);
  --gradient-text:  linear-gradient(135deg, #e8604c 0%, #f0956a 100%);

  /* ── Light Mode Surfaces ── */
  --bg-base:        #ffffff;
  --bg-surface:     #f7f7f8;
  --bg-card:        #ffffff;
  --bg-card-raised: #f0f0f2;
  --bg-input:       #f7f7f8;

  /* ── Light Mode Text ── */
  --text-primary:   #111318;
  --text-secondary: #5a5f6e;
  --text-muted:     #9298a8;
  --text-dim:       #c4c8d2;

  /* ── Light Mode Borders ── */
  --border:         rgba(0,0,0,0.07);
  --border-mid:     rgba(0,0,0,0.11);
  --border-bright:  rgba(0,0,0,0.18);
  --border-accent:  rgba(232,96,76,0.25);

  /* ── Secondary Accents ── */
  --blue-soft:      #4a90d9;
  --green-soft:     #3a9e6e;
  --amber-soft:     #d97f2a;

  /* ── Typography ── */
  --font-display: 'Nunito', sans-serif;
  --font-body:    'Nunito Sans', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* ── Spacing ── */
  --section-py:    108px;
  --container-max: 1200px;
  --container-px:  28px;

  /* ── Radii ── */
  --radius-xs:   6px;
  --radius-sm:   10px;
  --radius-md:   16px;
  --radius-lg:   22px;
  --radius-xl:   32px;
  --radius-full: 9999px;

  /* ── Shadows ── */
  --shadow-xs:    0 1px 4px rgba(0,0,0,0.06);
  --shadow-sm:    0 2px 12px rgba(0,0,0,0.08);
  --shadow-card:  0 4px 28px rgba(0,0,0,0.09);
  --shadow-accent:0 6px 32px rgba(232,96,76,0.18);
  --shadow-hover: 0 12px 48px rgba(232,96,76,0.2);

  /* ── Easing ── */
  --ease-out:    cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast:  0.16s ease;
  --t-med:   0.28s var(--ease-out);
  --t-slow:  0.55s var(--ease-out);
}

/* ── Dark Mode Overrides ── */
[data-theme="dark"] {
  --bg-base:        #0e1014;
  --bg-surface:     #141720;
  --bg-card:        #191d27;
  --bg-card-raised: #1e2330;
  --bg-input:       #0b0e14;

  --text-primary:   #edf0f5;
  --text-secondary: #8a90a2;
  --text-muted:     #4e5468;
  --text-dim:       #282e3e;

  --border:         rgba(255,255,255,0.06);
  --border-mid:     rgba(255,255,255,0.1);
  --border-bright:  rgba(255,255,255,0.16);
  --border-accent:  rgba(232,96,76,0.28);

  --shadow-xs:    0 1px 4px rgba(0,0,0,0.3);
  --shadow-sm:    0 2px 12px rgba(0,0,0,0.35);
  --shadow-card:  0 4px 28px rgba(0,0,0,0.45);
  --shadow-accent:0 6px 32px rgba(232,96,76,0.22);
  --shadow-hover: 0 12px 48px rgba(232,96,76,0.25);
}

/* ─── BASE ───────────────────────────────────────────────────── */
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.72;
  overflow-x: hidden;
  transition: background 0.35s ease, color 0.35s ease;
}

/* Light mode subtle dot texture */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: radial-gradient(circle, rgba(232,96,76,0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none; z-index: 0;
  opacity: 1;
  transition: opacity 0.35s ease;
}
[data-theme="dark"] body::before { opacity: 0.6; }

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--accent-dark); }
ul { list-style: none; }

.container {
  max-width: var(--container-max); margin: 0 auto;
  padding: 0 var(--container-px); position: relative; z-index: 1;
}
.section { padding: var(--section-py) 0; }

/* ─── SCROLL ANIMATIONS ──────────────────────────────────────── */
.fade-in {
  opacity: 0; transform: translateY(22px);
  animation: fadeInUp 0.7s var(--ease-out) forwards;
}
.fade-in.delay-1 { animation-delay: 0.1s; }
.fade-in.delay-2 { animation-delay: 0.22s; }
.fade-in.delay-3 { animation-delay: 0.36s; }

.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal.delay-1 { transition-delay: 0.08s; }
.reveal.delay-2 { transition-delay: 0.18s; }
.reveal.delay-3 { transition-delay: 0.3s; }

@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }

/* ─── THEME TOGGLE BUTTON ────────────────────────────────────── */
.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  background: var(--bg-card); border: 1.5px solid var(--border-mid);
  border-radius: var(--radius-full); cursor: pointer;
  color: var(--text-secondary); transition: all var(--t-fast);
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--accent); color: var(--accent);
  background: var(--accent-faint);
}
.theme-toggle .icon-sun  { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun  { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ─── BUTTONS ────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-display); font-size: 0.875rem;
  font-weight: 700; letter-spacing: 0.01em;
  cursor: pointer; transition: all var(--t-med);
  text-decoration: none; border: 1.5px solid transparent;
  white-space: nowrap; border-radius: var(--radius-full);
  position: relative; overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute; top: 0; left: -80%; width: 50%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: left 0.5s var(--ease-out);
}
.btn:hover::before { left: 130%; }

.btn-primary {
  background: var(--gradient); color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(232,96,76,0.28);
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-hover); color: #fff;
}

.btn-secondary {
  background: var(--accent-faint); color: var(--accent);
  border-color: var(--border-accent);
}
.btn-secondary:hover {
  background: var(--accent-soft); border-color: var(--accent);
  transform: translateY(-2px); color: var(--accent);
}

.btn-outline {
  background: transparent; color: var(--text-secondary);
  border-color: var(--border-mid);
}
.btn-outline:hover {
  background: var(--bg-surface); border-color: var(--border-bright);
  color: var(--text-primary); transform: translateY(-2px);
}

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

/* ─── SECTION HEADER ─────────────────────────────────────────── */
.section-header { text-align: center; margin-bottom: 68px; }

.section-tag {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 500;
  color: var(--accent); margin-bottom: 14px;
  letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--accent-faint); border: 1px solid var(--border-accent);
  padding: 5px 14px; border-radius: var(--radius-full);
}
.section-tag::before {
  content: ''; width: 5px; height: 5px;
  background: var(--accent); border-radius: 50%;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 2.9rem);
  font-weight: 800; color: var(--text-primary);
  line-height: 1.15; margin-bottom: 14px; letter-spacing: -0.02em;
}
.section-title span {
  background: var(--gradient-text);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.section-subtitle {
  font-family: var(--font-body); font-size: 1rem;
  color: var(--text-secondary); max-width: 520px; margin: 0 auto; line-height: 1.75;
}

/* ─── TAGS ───────────────────────────────────────────────────── */
.tag {
  display: inline-block; padding: 4px 11px;
  background: var(--bg-surface); color: var(--text-secondary);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-full);
  font-size: 0.71rem; font-weight: 600;
  font-family: var(--font-mono); letter-spacing: 0.03em;
  transition: all var(--t-fast);
}
.tag:hover {
  background: var(--accent-faint); color: var(--accent);
  border-color: var(--border-accent);
}

/* ─── NAVBAR ─────────────────────────────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  padding: 14px 0; transition: all var(--t-med);
  border-bottom: 1px solid transparent;
}
.navbar.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px) saturate(160%); -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
[data-theme="dark"] .navbar.scrolled {
  background: rgba(14,16,20,0.92);
}

.nav-container {
  max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-px);
  display: flex; align-items: center; justify-content: space-between;
  position: relative; z-index: 1; gap: 16px;
}

.nav-logo {
  font-family: var(--font-display); font-size: 1.1rem; font-weight: 800;
  color: var(--text-primary); text-decoration: none; letter-spacing: -0.02em;
}
.logo-bracket {
  background: var(--gradient-text);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.nav-links { display: flex; align-items: center; gap: 4px; }

.nav-link {
  padding: 7px 14px;
  font-family: var(--font-display); font-size: 0.82rem; font-weight: 600;
  color: var(--text-secondary); text-decoration: none;
  border-radius: var(--radius-full); transition: all var(--t-fast);
}
.nav-link:hover { color: var(--accent); background: var(--accent-faint); }
.nav-link.active {
  color: var(--accent); background: var(--accent-faint);
  border: 1px solid var(--border-accent);
}

/* Nav right cluster */
.nav-right { display: flex; align-items: center; gap: 10px; }

.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: all var(--t-med); }
.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); }

/* ─── HERO ───────────────────────────────────────────────────── */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  position: relative; padding: 130px var(--container-px) 110px; overflow: hidden;
}

/* Background accent blob */
.hero-bg-grid {
  position: absolute; inset: 0; pointer-events: none; overflow: hidden;
}
.hero-bg-grid::before {
  content: '';
  position: absolute; top: -15%; right: -10%;
  width: 55vw; height: 55vw; max-width: 700px; max-height: 700px;
  background: radial-gradient(ellipse at center, rgba(232,96,76,0.07) 0%, transparent 65%);
  border-radius: 50%;
}
.hero-bg-grid::after {
  content: '';
  position: absolute; bottom: -10%; left: -8%;
  width: 40vw; height: 40vw; max-width: 500px; max-height: 500px;
  background: radial-gradient(ellipse at center, rgba(240,149,106,0.05) 0%, transparent 65%);
  border-radius: 50%;
}

/* Floating phone outlines */
.hero::before {
  content: '';
  position: absolute; top: 12%; right: 6%;
  width: 100px; height: 190px;
  border: 1.5px solid rgba(232,96,76,0.1); border-radius: 20px;
  animation: floatDevice 7s ease-in-out infinite;
}
.hero::after {
  content: '';
  position: absolute; top: 22%; right: 11%;
  width: 74px; height: 140px;
  border: 1px solid rgba(232,96,76,0.07); border-radius: 15px;
  animation: floatDevice 7s ease-in-out infinite 1.5s;
}
@keyframes floatDevice {
  0%, 100% { transform: translateY(0) rotate(-4deg); opacity: 0.5; }
  50%       { transform: translateY(-14px) rotate(-4deg); opacity: 1; }
}

.hero-container {
  max-width: var(--container-max); width: 100%; margin: 0 auto;
  display: flex; align-items: center; gap: 72px; position: relative; z-index: 1;
}

/* Profile Photo */
.hero-photo-wrap { flex-shrink: 0; position: relative; }

.photo-ring {
  width: 228px; height: 228px; border-radius: 40px;
  padding: 3px; background: var(--gradient);
  box-shadow: var(--shadow-accent);
}
.hero-photo {
  width: 100%; height: 100%; border-radius: 38px;
  object-fit: cover; background: var(--bg-surface); display: block;
}

/* Platform shadow */
.hero-photo-wrap::after {
  content: '';
  position: absolute; bottom: -16px; left: 12%; right: 12%;
  height: 24px;
  background: var(--accent-glow); filter: blur(16px);
  border-radius: 50%; z-index: 0;
}

.status-dot {
  position: absolute; bottom: -10px; right: -10px; z-index: 2;
  display: flex; align-items: center; gap: 6px;
  background: var(--bg-card);
  border: 1.5px solid var(--border-mid);
  padding: 6px 13px; border-radius: var(--radius-full);
  font-family: var(--font-display); font-size: 0.7rem; font-weight: 700;
  color: var(--green-soft); letter-spacing: 0.01em; white-space: nowrap;
  box-shadow: var(--shadow-card);
}
.status-dot::before {
  content: ''; width: 7px; height: 7px; background: var(--green-soft);
  border-radius: 50%; animation: pulseDot 2.5s infinite;
}
@keyframes pulseDot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(58,158,110,0.5); }
  50%       { box-shadow: 0 0 0 6px rgba(58,158,110,0); }
}

/* Hero Text */
.hero-text { flex: 1; }

.hero-greeting {
  font-family: var(--font-mono); font-size: 0.76rem; font-weight: 400;
  color: var(--accent); margin-bottom: 12px; letter-spacing: 0.12em; text-transform: uppercase;
  display: flex; align-items: center; gap: 10px;
}
.hero-greeting::before {
  content: ''; display: block; width: 26px; height: 1.5px;
  background: var(--accent); opacity: 0.6;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6.5vw, 4.6rem);
  font-weight: 900; line-height: 1.05; color: var(--text-primary);
  margin-bottom: 12px; letter-spacing: -0.03em;
}
.hero-name strong {
  background: var(--gradient-text);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; font-weight: 900;
}

.hero-title {
  font-family: var(--font-display); font-size: clamp(0.9rem, 2vw, 1.08rem);
  font-weight: 600; color: var(--text-secondary); margin-bottom: 20px; letter-spacing: 0.005em;
}
.title-divider { color: var(--border-mid); margin: 0 10px; }

.hero-tagline {
  font-family: var(--font-body); font-size: 1rem; color: var(--text-secondary);
  max-width: 490px; line-height: 1.82; margin-bottom: 34px;
  padding: 16px 20px;
  background: var(--gradient-soft); border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }

.hero-stack { display: flex; flex-wrap: wrap; gap: 7px; }
.stack-pill {
  display: inline-block; padding: 5px 14px;
  font-family: var(--font-mono); font-size: 0.7rem; font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-surface);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-full); letter-spacing: 0.03em; transition: all var(--t-fast);
}
.stack-pill:hover {
  color: var(--accent); border-color: var(--border-accent);
  background: var(--accent-faint); transform: translateY(-1px);
}

/* ─── SCROLL INDICATOR ───────────────────────────────────────── */
.scroll-indicator {
  position: absolute; bottom: 36px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.62rem; color: var(--text-muted);
  letter-spacing: 0.12em; text-transform: uppercase;
  cursor: pointer; z-index: 10;
  animation: bounceScroll 2.5s ease infinite;
  text-decoration: none;
}
.scroll-indicator:hover { color: var(--accent); }

.scroll-mouse {
  width: 22px; height: 34px; border: 2px solid var(--border-mid);
  border-radius: 11px; display: flex; justify-content: center; padding-top: 6px;
  transition: border-color var(--t-fast);
}
.scroll-indicator:hover .scroll-mouse { border-color: var(--accent); }

.scroll-wheel {
  width: 3px; height: 7px; background: var(--accent);
  border-radius: 2px; animation: scrollWheel 2s infinite;
}

@keyframes scrollWheel {
  0%   { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(9px); opacity: 0; }
}
@keyframes bounceScroll {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(-6px); }
}

/* ─── ABOUT ──────────────────────────────────────────────────── */
.about { background: var(--bg-surface); position: relative; }
.about::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--accent) 45%, var(--accent-light) 55%, transparent 100%);
  opacity: 0.3;
}

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 68px; align-items: start; }
.about-text p { color: var(--text-secondary); margin-bottom: 18px; font-size: 0.97rem; line-height: 1.85; }
.about-text strong { color: var(--text-primary); font-weight: 700; }

/* Stats */
.about-stats { display: flex; gap: 14px; margin-top: 32px; }

.stat-card {
  flex: 1; text-align: center; padding: 22px 14px;
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--radius-lg); position: relative; overflow: hidden;
  transition: all var(--t-med); box-shadow: var(--shadow-xs);
}
.stat-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient); transform: scaleX(0); transform-origin: left; transition: transform var(--t-med);
}
.stat-card:hover { border-color: var(--border-accent); box-shadow: var(--shadow-accent); transform: translateY(-3px); }
.stat-card:hover::before { transform: scaleX(1); }

.stat-number {
  display: block; font-family: var(--font-display); font-size: 2rem; font-weight: 900;
  background: var(--gradient-text);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  line-height: 1; margin-bottom: 6px;
}
.stat-label { display: block; font-family: var(--font-body); font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.04em; font-weight: 500; }

/* Skills */
.skills-heading { font-family: var(--font-display); font-size: 0.88rem; font-weight: 800; color: var(--text-primary); margin-bottom: 22px; letter-spacing: -0.01em; }

.skill-list { display: flex; flex-direction: column; gap: 17px; }
.skill-item { display: flex; flex-direction: column; gap: 7px; }
.skill-name { font-family: var(--font-display); font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); display: flex; justify-content: space-between; }
.skill-name span:last-child { color: var(--accent); font-family: var(--font-mono); font-size: 0.72rem; }
.skill-bar { height: 5px; background: var(--bg-surface); border-radius: var(--radius-full); overflow: hidden; border: 1px solid var(--border); }
.skill-fill {
  height: 100%; background: var(--gradient);
  border-radius: var(--radius-full); width: 0;
  transition: width 1.4s var(--ease-out);
  position: relative; overflow: hidden;
}
.skill-fill::after {
  content: ''; position: absolute; top: 0; left: -60%; width: 45%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: shimmerBar 3s ease infinite;
}
@keyframes shimmerBar { 0% { left: -60%; } 100% { left: 140%; } }

/* AI Tools */
.ai-tools-section {
  margin-top: 56px; background: var(--gradient-soft);
  border: 1.5px solid var(--border-accent); border-radius: var(--radius-xl);
  padding: 30px 34px; display: flex; flex-direction: column; gap: 14px; position: relative; overflow: hidden;
}
.ai-tools-section::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--gradient); }
.ai-tools-heading { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-size: 0.9rem; font-weight: 800; color: var(--text-primary); }
.ai-tools-desc { font-family: var(--font-body); font-size: 0.9rem; color: var(--text-secondary); max-width: 680px; line-height: 1.75; }
.ai-tools-grid { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.ai-pill {
  display: inline-block; padding: 5px 14px;
  background: var(--bg-card); border: 1.5px solid var(--border-accent);
  color: var(--accent); border-radius: var(--radius-full);
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.03em;
  transition: all var(--t-fast); box-shadow: var(--shadow-xs);
}
.ai-pill:hover { background: var(--accent); color: #fff; border-color: var(--accent); transform: translateY(-1px); }

/* ─── WHAT I BUILD ───────────────────────────────────────────── */
.build-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

.build-card {
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--radius-lg); padding: 30px 26px;
  transition: all var(--t-med); position: relative; overflow: hidden;
  box-shadow: var(--shadow-xs);
}
.build-card::before {
  content: ''; position: absolute; inset: 0;
  background: var(--gradient-soft); opacity: 0;
  transition: opacity var(--t-med); border-radius: var(--radius-lg);
}
.build-card::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient); transform: scaleX(0); transform-origin: left; transition: transform var(--t-med);
}
.build-card:hover { border-color: var(--border-accent); transform: translateY(-5px); box-shadow: var(--shadow-accent); }
.build-card:hover::before { opacity: 1; }
.build-card:hover::after { transform: scaleX(1); }

.build-icon {
  width: 50px; height: 50px; background: var(--accent-faint);
  border: 1.5px solid var(--border-accent); border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; color: var(--accent); transition: all var(--t-med);
}
.build-card:hover .build-icon { background: var(--accent); color: #fff; border-color: var(--accent); }
.build-card h3 { font-family: var(--font-display); font-size: 0.97rem; font-weight: 800; color: var(--text-primary); margin-bottom: 10px; }
.build-card p  { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.72; }

/* ─── PROJECTS ───────────────────────────────────────────────── */
.projects { background: var(--bg-surface); }
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.project-card {
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  display: flex; flex-direction: column; gap: 14px;
  transition: all var(--t-med); position: relative; overflow: hidden;
  box-shadow: var(--shadow-xs);
}
.project-card::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient); transform: scaleX(0); transform-origin: left; transition: transform var(--t-med);
}
.project-card:hover { border-color: var(--border-accent); box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.project-card:hover::after { transform: scaleX(1); }

.project-header { display: flex; align-items: flex-start; justify-content: space-between; }
.project-icon-wrap { width: 44px; height: 44px; background: var(--accent-faint); border: 1.5px solid var(--border-accent); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: var(--accent); }
.project-links { display: flex; gap: 8px; }
.project-link { display: flex; align-items: center; justify-content: center; width: 34px; height: 34px; background: var(--bg-surface); border: 1.5px solid var(--border-mid); border-radius: var(--radius-xs); color: var(--text-muted); transition: all var(--t-fast); }
.project-link:hover { color: var(--accent); border-color: var(--border-accent); background: var(--accent-faint); }
.project-title { font-family: var(--font-display); font-size: 1.05rem; font-weight: 800; color: var(--text-primary); }
.project-desc  { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.72; flex: 1; }
.project-tags  { display: flex; flex-wrap: wrap; gap: 7px; }

/* ─── APPROACH ───────────────────────────────────────────────── */
.workflow-steps { display: flex; flex-direction: column; gap: 0; max-width: 760px; margin: 0 auto 60px; }
.step { display: flex; gap: 22px; position: relative; }
.step-number {
  flex-shrink: 0; font-family: var(--font-display); font-size: 2.6rem; font-weight: 900;
  background: var(--gradient-text);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  opacity: 0.18; line-height: 1; min-width: 58px; padding-top: 8px;
}
.step-content {
  flex: 1; padding: 24px 28px;
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--radius-lg); transition: all var(--t-med); box-shadow: var(--shadow-xs);
}
.step-content:hover { border-color: var(--border-accent); box-shadow: var(--shadow-accent); }
.step-icon { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; background: var(--accent-faint); border: 1.5px solid var(--border-accent); border-radius: var(--radius-xs); color: var(--accent); margin-bottom: 12px; }
.step-content h3 { font-family: var(--font-display); font-size: 0.97rem; font-weight: 800; color: var(--text-primary); margin-bottom: 7px; }
.step-content p  { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.72; }

.step-connector { width: 2.5px; height: 24px; background: var(--gradient); margin-left: 28px; opacity: 0.25; border-radius: 2px; }

.approach-summary { max-width: 700px; margin: 0 auto; }
.quote-block {
  background: var(--gradient-soft); border: 1.5px solid var(--border-accent);
  border-left: 4px solid var(--accent); border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: 28px 32px;
}
.quote-block p    { font-family: var(--font-body); font-size: 1rem; color: var(--text-secondary); line-height: 1.8; font-style: italic; margin-bottom: 12px; }
.quote-block cite { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent); font-style: normal; letter-spacing: 0.06em; }

/* ─── EXPERIENCE ─────────────────────────────────────────────── */
.experience { background: var(--bg-surface); }
.timeline { max-width: 760px; margin: 0 auto; position: relative; display: flex; flex-direction: column; }
.timeline::before { content: ''; position: absolute; left: 11px; top: 12px; bottom: 12px; width: 2px; background: var(--gradient); opacity: 0.25; border-radius: 2px; }
.timeline-item { display: flex; gap: 28px; padding-bottom: 28px; position: relative; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot { flex-shrink: 0; width: 24px; height: 24px; border-radius: 50%; background: var(--bg-surface); border: 2.5px solid var(--accent); box-shadow: 0 0 12px rgba(232,96,76,0.25); margin-top: 12px; z-index: 1; transition: background var(--t-med); }
.timeline-item:hover .timeline-dot { background: var(--accent); }

.timeline-card { flex: 1; background: var(--bg-card); border: 1.5px solid var(--border); border-radius: var(--radius-lg); padding: 24px 26px; transition: all var(--t-med); box-shadow: var(--shadow-xs); }
.timeline-card:hover { border-color: var(--border-accent); box-shadow: var(--shadow-accent); }
.timeline-meta { display: flex; align-items: flex-start; justify-content: space-between; flex-wrap: wrap; gap: 8px; margin-bottom: 4px; }
.timeline-role    { font-family: var(--font-display); font-size: 1.02rem; font-weight: 800; color: var(--text-primary); }
.timeline-period  { font-family: var(--font-mono); font-size: 0.69rem; font-weight: 600; color: var(--accent); background: var(--accent-faint); padding: 3px 10px; border-radius: var(--radius-full); border: 1px solid var(--border-accent); white-space: nowrap; letter-spacing: 0.05em; }
.timeline-company { font-family: var(--font-display); font-size: 0.82rem; font-weight: 600; color: var(--text-muted); margin-bottom: 10px; }
.timeline-desc    { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.72; margin-bottom: 13px; }
.timeline-tags    { display: flex; flex-wrap: wrap; gap: 7px; }

/* Education */
.education-block { margin-top: 44px; max-width: 760px; margin-left: auto; margin-right: auto; }
.edu-card { display: flex; align-items: flex-start; gap: 20px; background: var(--bg-card); border: 1.5px solid var(--border); border-radius: var(--radius-lg); padding: 26px 28px; transition: all var(--t-med); box-shadow: var(--shadow-xs); }
.edu-card:hover { border-color: var(--border-accent); box-shadow: var(--shadow-accent); }
.edu-icon { flex-shrink: 0; width: 46px; height: 46px; background: var(--accent-faint); border: 1.5px solid var(--border-accent); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: var(--accent); }
.edu-card h4 { font-family: var(--font-display); font-size: 1rem; font-weight: 800; color: var(--text-primary); margin-bottom: 6px; }
.edu-card p  { font-family: var(--font-body); font-size: 0.875rem; color: var(--text-secondary); }

/* ─── CONTACT ────────────────────────────────────────────────── */
.contact-grid  { display: grid; grid-template-columns: 1fr 1.4fr; gap: 68px; align-items: start; }
.contact-info  { display: flex; flex-direction: column; gap: 26px; }
.contact-item  { display: flex; align-items: flex-start; gap: 16px; }
.contact-icon  { flex-shrink: 0; width: 44px; height: 44px; background: var(--accent-faint); border: 1.5px solid var(--border-accent); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: var(--accent); }
.contact-item h4 { font-family: var(--font-display); font-size: 0.72rem; font-weight: 800; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 4px; }
.contact-item a, .contact-item span { font-family: var(--font-body); font-size: 0.9rem; color: var(--text-secondary); transition: color var(--t-fast); }
.contact-item a:hover { color: var(--accent); }

.social-links { display: flex; gap: 10px; padding-top: 8px; }
.social-icon { width: 44px; height: 44px; background: var(--bg-surface); border: 1.5px solid var(--border-mid); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: var(--text-muted); transition: all var(--t-med); }
.social-icon:hover { color: var(--accent); border-color: var(--border-accent); background: var(--accent-faint); transform: translateY(-2px); box-shadow: var(--shadow-accent); }

/* Contact Form */
.contact-form {
  display: flex; flex-direction: column; gap: 20px;
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: var(--radius-xl); padding: 38px;
  position: relative; overflow: hidden; box-shadow: var(--shadow-card);
}
.contact-form::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--gradient); }

.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group label { font-family: var(--font-display); font-size: 0.78rem; font-weight: 700; color: var(--text-secondary); letter-spacing: 0.02em; }
.form-group input, .form-group textarea {
  background: var(--bg-input); border: 1.5px solid var(--border-mid);
  border-radius: var(--radius-sm); padding: 12px 16px;
  font-family: var(--font-body); font-size: 0.9rem; color: var(--text-primary);
  resize: vertical; transition: border-color var(--t-fast), box-shadow var(--t-fast);
  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(--accent); box-shadow: 0 0 0 3px rgba(232,96,76,0.1); }
.form-group input.error, .form-group textarea.error { border-color: #e53e3e; box-shadow: 0 0 0 3px rgba(229,62,62,0.1); }
.form-error   { font-family: var(--font-mono); font-size: 0.72rem; color: #e53e3e; min-height: 1em; }
.form-success { display: none; align-items: center; gap: 10px; background: rgba(58,158,110,0.08); border: 1px solid rgba(58,158,110,0.25); border-radius: var(--radius-sm); padding: 14px 16px; font-family: var(--font-display); font-size: 0.875rem; color: var(--green-soft); font-weight: 700; }
.form-success.show { display: flex; }

/* ─── FOOTER ─────────────────────────────────────────────────── */
.footer { background: var(--bg-surface); border-top: 1px solid var(--border); padding: 36px 0; text-align: center; }
.footer-text { font-family: var(--font-body); font-size: 0.875rem; color: var(--text-secondary); margin-bottom: 6px; }
.footer-text strong { background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-weight: 800; }
.footer-copy { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted); letter-spacing: 0.05em; }

/* ─── BACK TO TOP ────────────────────────────────────────────── */
.back-to-top { position: fixed; bottom: 28px; right: 28px; width: 46px; height: 46px; background: var(--gradient); border: none; border-radius: var(--radius-sm); color: #fff; display: flex; align-items: center; justify-content: center; cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(10px); transition: all var(--t-med); z-index: 999; box-shadow: var(--shadow-accent); }
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px) scale(1.08); box-shadow: var(--shadow-hover); }

/* ─── SCROLLBAR ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--accent), var(--accent-light)); border-radius: 999px; }

::selection { background: rgba(232,96,76,0.2); color: var(--text-primary); }

/* ─── RESPONSIVE TABLET ──────────────────────────────────────── */
@media (max-width: 960px) {
  .nav-links { display: none; position: fixed; top: 64px; left: 0; width: 100%; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); flex-direction: column; align-items: stretch; padding: 12px 20px 24px; border-bottom: 1px solid var(--border); gap: 3px; box-shadow: var(--shadow-sm); }
  [data-theme="dark"] .nav-links { background: rgba(14,16,20,0.98); }
  .nav-links.open { display: flex; }
  .nav-link { padding: 11px 16px; font-size: 0.84rem; border-radius: var(--radius-sm); }
  .hamburger { display: flex; }
  .hero::before, .hero::after { display: none; }
  .hero-container { flex-direction: column; text-align: center; gap: 40px; }
  .hero-text { display: flex; flex-direction: column; align-items: center; }
  .hero-greeting { justify-content: center; }
  .hero-greeting::before { display: none; }
  .hero-tagline { margin: 0 auto 34px; }
  .hero-actions { justify-content: center; }
  .hero-stack { justify-content: center; }
  .about-grid    { grid-template-columns: 1fr; gap: 48px; }
  .build-grid    { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid  { grid-template-columns: 1fr; gap: 48px; }
}

/* ─── RESPONSIVE MOBILE ──────────────────────────────────────── */
@media (max-width: 600px) {
  :root { --section-py: 72px; --container-px: 18px; }
  .photo-ring { width: 188px; height: 188px; border-radius: 32px; }
  .hero-photo { border-radius: 30px; }
  .hero-actions { flex-direction: column; align-items: stretch; width: 100%; }
  .hero-actions .btn { justify-content: center; }
  .about-stats { flex-direction: column; gap: 10px; }
  .build-grid { grid-template-columns: 1fr; }
  .timeline::before { display: none; }
  .timeline-item { gap: 14px; }
  .timeline-dot { display: none; }
  .contact-form { padding: 28px 20px; }
  .section-header { margin-bottom: 48px; }
  .step { flex-direction: column; gap: 4px; }
  .step-number { font-size: 2rem; min-width: auto; }
  .hero { padding-bottom: 100px; }
}