/* ============================================================
   ALEX RIVERA — PORTFOLIO STYLESHEET
   Architecture: CSS Custom Properties → Base → Layout → Components
   Theme: Editorial Dark Luxury
   ============================================================ */

/* ── 1. DESIGN TOKENS ─────────────────────────────────────── */
:root {
  /* Accent */
  --accent:        #2D77FF;
  --accent-glow:   rgba(45, 119, 255, 0.25);
  --accent-light:  rgba(45, 119, 255, 0.1);

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  /* Spacing scale */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;
  --sp-32: 8rem;

  /* Radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --duration-fast: 150ms;
  --duration-base: 280ms;
  --duration-slow: 500ms;

  /* Container */
  --container-max: 1160px;
  --container-pad: clamp(var(--sp-6), 5vw, var(--sp-16));

  /* Navbar height */
  --nav-h: 68px;
}

/* ── DARK THEME (default) ──────────────────────────────────── */
[data-theme="dark"] {
  --bg:           #0B0C0F;
  --bg-2:         #111318;
  --bg-card:      #161920;
  --bg-card-hover:#1c2029;
  --border:       rgba(255,255,255,0.07);
  --border-focus: rgba(45,119,255,0.6);

  --text-primary:   #F2F3F5;
  --text-secondary: #8B8FA8;
  --text-muted:     #555870;

  --shadow-card: 0 4px 32px rgba(0,0,0,0.45);
  --shadow-glow: 0 0 80px rgba(45,119,255,0.12);
}

/* ── LIGHT THEME ────────────────────────────────────────────── */
[data-theme="light"] {
  --bg:           #F8F9FB;
  --bg-2:         #FFFFFF;
  --bg-card:      #FFFFFF;
  --bg-card-hover:#F0F3FC;
  --border:       rgba(0,0,0,0.08);
  --border-focus: rgba(45,119,255,0.5);

  --text-primary:   #0D0F14;
  --text-secondary: #5A5F75;
  --text-muted:     #A0A5BB;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-glow: 0 0 80px rgba(45,119,255,0.08);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--duration-slow) var(--ease-out),
              color var(--duration-slow) var(--ease-out);
}

::selection { background: var(--accent); color: #fff; }

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; }

button, input, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ── 3. LAYOUT UTILITIES ────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* ── 4. TYPOGRAPHY ──────────────────────────────────────────── */
.section-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--sp-6);
}

.section-heading em {
  font-style: normal;
  color: var(--accent);
}

.section-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 48ch;
  margin-bottom: var(--sp-12);
  line-height: 1.7;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--sp-5);
}

/* ── 5. BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.75rem 1.6rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    background var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.btn:hover  { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 4px 24px var(--accent-glow);
}
.btn-primary:hover {
  background: #1a62f0;
  border-color: #1a62f0;
  box-shadow: 0 6px 32px rgba(45,119,255,0.4);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-ghost:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

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

/* ── 6. NAVBAR ──────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  border-bottom: 1px solid transparent;
  transition:
    background var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    backdrop-filter var(--duration-base) var(--ease-out);
}

.navbar.scrolled {
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-color: var(--border);
}

.nav-container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-right: auto;
  flex-shrink: 0;
}

.logo-mark {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 800;
  display: grid;
  place-items: center;
  letter-spacing: 0.02em;
  flex-shrink: 0;
  transition: box-shadow var(--duration-base) var(--ease-out);
}
.nav-logo:hover .logo-mark {
  box-shadow: 0 0 20px var(--accent-glow);
}

.logo-text {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  padding: var(--sp-1) 0;
  position: relative;
  transition: color var(--duration-base) var(--ease-out);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  border-radius: var(--radius-full);
  transition: width var(--duration-base) var(--ease-out);
}
.nav-link:hover,
.nav-link.active { color: var(--text-primary); }
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

/* Theme toggle */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
}

.toggle-track {
  width: 52px; height: 28px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 3px;
  transition: background var(--duration-base) var(--ease-out);
}

.toggle-thumb {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--accent);
  display: grid;
  place-items: center;
  transition: transform var(--duration-base) var(--ease-out);
  overflow: hidden;
}

[data-theme="dark"]  .toggle-thumb { transform: translateX(0); }
[data-theme="light"] .toggle-thumb { transform: translateX(24px); }

.toggle-thumb svg {
  width: 12px; height: 12px;
  color: #fff;
  position: absolute;
  transition: opacity var(--duration-base), transform var(--duration-base);
}

.icon-moon { opacity: 1; }
.icon-sun  { opacity: 0; }

[data-theme="light"] .icon-moon { opacity: 0; }
[data-theme="light"] .icon-sun  { opacity: 1; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  padding: 7px;
  transition: border-color var(--duration-base);
}
.hamburger:hover { border-color: var(--accent); }

.bar {
  width: 100%; height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-base);
}

.hamburger.open .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open .bar:nth-child(2) { opacity: 0; }
.hamburger.open .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── 7. HERO ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
}

/* Dot grid background */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--text-muted) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.25;
  pointer-events: none;
}

[data-theme="light"] .hero-bg-grid { opacity: 0.15; }

/* Radial glow */
.hero-glow {
  position: absolute;
  top: -20%; left: -10%;
  width: 60vw; height: 60vw;
  max-width: 800px; max-height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  animation: pulseGlow 6s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
  from { opacity: 0.6; transform: scale(1); }
  to   { opacity: 1;   transform: scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  padding-block: var(--sp-24) var(--sp-20);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--sp-6);
}

.eyebrow-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #22c55e;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.hero-heading {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  margin-bottom: var(--sp-8);
  max-width: 16ch;
}

.hero-heading em {
  font-style: normal;
  color: var(--accent);
  position: relative;
}

.hero-sub {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 52ch;
  line-height: 1.8;
  margin-bottom: var(--sp-10);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  margin-bottom: var(--sp-16);
}

.hero-scroll-hint {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.scroll-line {
  display: block;
  width: 60px; height: 1px;
  background: linear-gradient(to right, var(--text-muted), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%   { transform: scaleX(1); opacity: 0.6; }
  50%  { transform: scaleX(0.5); opacity: 1; }
  100% { transform: scaleX(1); opacity: 0.6; }
}

/* Rotating badge */
.hero-badge {
  position: absolute;
  right: clamp(var(--sp-8), 8vw, var(--sp-32));
  bottom: clamp(var(--sp-16), 10vh, var(--sp-32));
  width: 120px; height: 120px;
  z-index: 1;
}

.badge-ring {
  width: 100%; height: 100%;
  animation: rotateBadge 20s linear infinite;
}

.badge-text {
  fill: var(--text-secondary);
  font-family: var(--font-display);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 2px;
}

@keyframes rotateBadge {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.badge-center {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

/* ── 8. SECTIONS (shared) ────────────────────────────────────── */
.about,
.projects,
.contact {
  padding-block: var(--sp-32);
}

/* ── 9. ABOUT ────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(var(--sp-12), 6vw, var(--sp-20));
  align-items: start;
}

/* Avatar */
.about-visual { position: relative; }

.avatar-frame {
  position: relative;
  width: 100%;
  max-width: 360px;
}

.avatar-img {
  aspect-ratio: 4/5;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-2) 100%);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  z-index: 1;
  transition: transform var(--duration-slow) var(--ease-out);
}
.avatar-img:hover { transform: translateY(-4px); }

.avatar-initials {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 800;
  color: var(--text-muted);
  letter-spacing: -0.05em;
  opacity: 0.3;
}

/* Decorative border offset */
.avatar-decoration {
  position: absolute;
  inset: 12px -12px -12px 12px;
  border-radius: var(--radius-xl);
  border: 2px solid var(--accent);
  opacity: 0.35;
  z-index: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}
.avatar-frame:hover .avatar-decoration { opacity: 0.6; }

/* Stats row */
.about-stats {
  display: flex;
  gap: var(--sp-6);
  margin-top: var(--sp-8);
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.04em;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* About text */
.about-body {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--sp-5);
  font-size: 1rem;
}

.about-body em {
  font-style: normal;
  color: var(--text-primary);
  font-weight: 500;
}

.skills-heading {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: var(--sp-8);
  margin-bottom: var(--sp-4);
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.skill-chip {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  transition:
    background var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
  cursor: default;
}
.skill-chip:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ── 10. PROJECTS ────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(340px, 100%), 1fr));
  gap: var(--sp-6);
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition:
    transform var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(45,119,255,0.25);
  box-shadow: var(--shadow-card), 0 0 32px var(--accent-glow);
}

/* Thumbnail */
.card-thumb {
  position: relative;
  height: 180px;
  overflow: hidden;
}

.thumb-pattern {
  position: absolute;
  inset: 0;
  transition: transform var(--duration-slow) var(--ease-out);
}
.project-card:hover .thumb-pattern { transform: scale(1.04); }

/* Pattern variants — each project thumb is distinctive */
.p1 {
  background: linear-gradient(135deg, #0f1629 0%, #1a2a5e 50%, #1e3a8a 100%);
  background-image:
    linear-gradient(135deg, #0f1629 0%, #1a2a5e 50%, #1e3a8a 100%),
    repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(45,119,255,.07) 20px, rgba(45,119,255,.07) 21px);
  background-blend-mode: normal;
}
.p2 {
  background:
    linear-gradient(135deg, #0f1f1a 0%, #0d3d2e 50%, #064e3b 100%);
}
.p3 {
  background:
    linear-gradient(135deg, #1e0a2e 0%, #4a1b6e 50%, #6d28d9 100%);
}
.p4 {
  background:
    linear-gradient(135deg, #1a0f00 0%, #7c2d12 50%, #c2410c 100%);
}

/* Geometric decoration overlay on all thumbs */
.card-thumb::after {
  content: '';
  position: absolute;
  bottom: -20px; right: -20px;
  width: 100px; height: 100px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.08);
}
.card-thumb::before {
  content: '';
  position: absolute;
  top: -30px; left: -30px;
  width: 120px; height: 120px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.05);
}

.thumb-label {
  position: absolute;
  top: var(--sp-4); left: var(--sp-4);
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-full);
  padding: 0.25rem 0.65rem;
}

/* Card body */
.card-body {
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  flex: 1;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.tag {
  display: inline-block;
  padding: 0.22rem 0.65rem;
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--accent-light);
  color: var(--accent);
  border: 1px solid rgba(45,119,255,0.2);
  letter-spacing: 0.03em;
}

.card-links {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  padding-top: var(--sp-2);
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  transition: color var(--duration-base) var(--ease-out);
}
.card-link svg { width: 14px; height: 14px; }
.card-link:hover { color: var(--accent); }

/* ── 11. CONTACT ─────────────────────────────────────────────── */
.contact { background: var(--bg-2); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(var(--sp-12), 6vw, var(--sp-20));
  align-items: start;
}

.contact-body {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--sp-6);
  font-size: 1rem;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: var(--sp-10);
  transition: gap var(--duration-base) var(--ease-out);
}
.contact-email svg { width: 16px; height: 16px; }
.contact-email:hover { gap: var(--sp-3); }

.social-links {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition:
    color var(--duration-base) var(--ease-out),
    background var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
  max-width: 200px;
}
.social-link svg { width: 16px; height: 16px; flex-shrink: 0; }
.social-link:hover {
  color: var(--accent);
  background: var(--accent-light);
  border-color: var(--accent);
  transform: translateX(4px);
}

/* Form */
.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--sp-8);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.form-label {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.form-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 400;
  transition:
    border-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.form-input::placeholder { color: var(--text-muted); }
.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-input.invalid { border-color: #ef4444; }

.form-textarea {
  resize: vertical;
  min-height: 130px;
}

.form-error {
  font-size: 0.78rem;
  color: #ef4444;
  font-weight: 500;
  min-height: 1em;
}

/* ── 12. FOOTER ──────────────────────────────────────────────── */
.footer {
  padding-block: var(--sp-8);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 400;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  transition:
    color var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}
.back-to-top svg { width: 14px; height: 14px; }
.back-to-top:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* ── 13. TOAST ───────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: var(--sp-8);
  right: var(--sp-8);
  z-index: 200;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-6);
  background: var(--bg-card);
  border: 1px solid rgba(34, 197, 94, 0.35);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  transform: translateY(120%) scale(0.95);
  opacity: 0;
  transition:
    transform var(--duration-slow) var(--ease-out),
    opacity var(--duration-slow) var(--ease-out);
  pointer-events: none;
}

.toast svg {
  width: 18px; height: 18px;
  color: #22c55e;
  flex-shrink: 0;
}

.toast.show {
  transform: translateY(0) scale(1);
  opacity: 1;
  pointer-events: auto;
}

/* ── 14. SCROLL ANIMATIONS ───────────────────────────────────── */
.section-reveal {
  opacity: 0;
  transform: translateY(36px);
  transition:
    opacity 0.7s var(--ease-out),
    transform 0.7s var(--ease-out);
}

.section-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered reveal for child elements */
.projects-grid .project-card.section-reveal:nth-child(2) { transition-delay: 80ms; }
.projects-grid .project-card.section-reveal:nth-child(3) { transition-delay: 160ms; }
.projects-grid .project-card.section-reveal:nth-child(4) { transition-delay: 240ms; }

.skills-grid .skill-chip:nth-child(2) { transition-delay: 30ms; }
.skills-grid .skill-chip:nth-child(3) { transition-delay: 60ms; }

/* Hero load animations */
.animate-on-load {
  opacity: 0;
  transform: translateY(24px);
  animation: heroReveal 0.8s var(--ease-out) forwards;
}

.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.45s; }
.delay-4 { animation-delay: 0.6s; }

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

/* ── 15. RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .about-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .avatar-frame { max-width: 260px; }
  .about-stats { justify-content: center; }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }

  /* Mobile nav */
  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: color-mix(in srgb, var(--bg) 97%, transparent);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: var(--sp-4) 0;
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition:
      transform var(--duration-base) var(--ease-out),
      opacity var(--duration-base),
      visibility var(--duration-base);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links li { width: 100%; }
  .nav-link {
    display: block;
    padding: var(--sp-4) var(--container-pad);
    font-size: 1rem;
    border-bottom: 1px solid var(--border);
  }
  .nav-link::after { display: none; }

  .hero-badge { display: none; }

  .hero-heading { font-size: clamp(2.5rem, 12vw, 4rem); }

  .about, .projects, .contact { padding-block: var(--sp-20); }

  .contact-form-wrap { padding: var(--sp-6); }

  .toast {
    left: var(--sp-4);
    right: var(--sp-4);
    bottom: var(--sp-6);
  }
}

@media (max-width: 480px) {
  .hero-ctas { flex-direction: column; align-items: flex-start; }
  .btn { width: 100%; justify-content: center; }
  .projects-grid { grid-template-columns: 1fr; }
}

/* ── 16. PRINT & MOTION PREFERENCES ─────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .section-reveal { opacity: 1; transform: none; }
  .animate-on-load { opacity: 1; transform: none; }
}
.avatar-img {
  /* add this line */
  padding: 0;
}