/* ═══════════════════════════════════════════
   NEIL HOFMAN PORTFOLIO — style.css
   Palette: Deep dark + electric violet accent
   Fonts: Clash Display (display) + Satoshi (body)
   ═══════════════════════════════════════════ */

/* ─── Design Tokens ─── */
:root {
  /* Type scale */
  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl:  clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3.5rem, 1rem + 8vw, 9rem);

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

  /* Radius */
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-interactive: 220ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;

  /* Font families */
  --font-display: 'Clash Display', 'Arial Black', sans-serif;
  --font-body:    'Satoshi', 'Inter', sans-serif;
}

/* ─── Color Palette: Dark Mode (default) ─── */
:root,
[data-theme="dark"] {
  --color-bg:              #0d0d10;
  --color-surface:         #131318;
  --color-surface-2:       #18181f;
  --color-surface-offset:  #1e1e28;
  --color-border:          #2a2a38;
  --color-divider:         #222230;

  --color-text:            #e8e8f0;
  --color-text-muted:      #8888a8;
  --color-text-faint:      #44445a;
  --color-text-inverse:    #0d0d10;

  /* Electric violet accent */
  --color-primary:         #7c3aed;
  --color-primary-bright:  #8b5cf6;
  --color-primary-hover:   #6d28d9;
  --color-primary-active:  #5b21b6;
  --color-primary-glow:    rgba(124, 58, 237, 0.25);
  --color-primary-subtle:  rgba(124, 58, 237, 0.12);

  --shadow-sm:  0 1px 2px rgba(0,0,0,0.35);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.45);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.55);
  --shadow-glow: 0 0 40px rgba(124,58,237,0.3);
}

/* ─── Color Palette: Light Mode ─── */
[data-theme="light"] {
  --color-bg:              #fafaf9;
  --color-surface:         #ffffff;
  --color-surface-2:       #f4f4f7;
  --color-surface-offset:  #eeeef4;
  --color-border:          #dddde8;
  --color-divider:         #e8e8f0;

  --color-text:            #12121a;
  --color-text-muted:      #5a5a78;
  --color-text-faint:      #aaaac0;
  --color-text-inverse:    #ffffff;

  --color-primary:         #7c3aed;
  --color-primary-bright:  #6d28d9;
  --color-primary-hover:   #6d28d9;
  --color-primary-active:  #5b21b6;
  --color-primary-glow:    rgba(124, 58, 237, 0.15);
  --color-primary-subtle:  rgba(124, 58, 237, 0.08);

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 40px rgba(124,58,237,0.15);
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  text-wrap: balance;
  line-height: 1.1;
}

p, li, figcaption {
  text-wrap: pretty;
  max-width: 72ch;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-interactive);
}

button { cursor: pointer; background: none; border: none; }

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

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

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

/* ─── Layout Utilities ─── */
.container {
  width: min(var(--content-wide), 100% - var(--space-8));
  margin-inline: auto;
}

.section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}

/* ─── Section Labels ─── */
.section-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary-bright);
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-12);
  line-height: 1.1;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-full);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition-interactive);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: 0 0 24px var(--color-primary-glow);
  transform: translateY(-1px);
}

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

/* ═══════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 80%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}

.header--hidden { transform: translateY(-100%); }
.header--scrolled { box-shadow: var(--shadow-md); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: var(--space-6);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  color: var(--color-text);
  transition: opacity var(--transition-fast);
}
.logo:hover { opacity: 0.8; }
.logo-name { white-space: nowrap; }

/* Nav */
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.nav-link:hover {
  color: var(--color-text);
  background: var(--color-primary-subtle);
}

.nav-cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
}
.nav-cta:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 0 16px var(--color-primary-glow);
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-primary-subtle);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
}
.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-text);
  transition: all 0.25s ease;
  transform-origin: center;
}
.mobile-menu-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.mobile-menu-toggle.open span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile nav */
.mobile-nav {
  display: none;
  padding: var(--space-4) 0 var(--space-6);
  border-top: 1px solid var(--color-divider);
}
.mobile-nav ul { list-style: none; }
.mobile-nav-link {
  display: block;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}
.mobile-nav-link:hover { color: var(--color-primary-bright); }

@media (max-width: 768px) {
  .nav { display: none; }
  .mobile-menu-toggle { display: flex; }
  .mobile-nav.open { display: block; }
}

/* ═══════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 80px;
}

/* Grid background */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 30%, black 0%, transparent 70%);
}

/* Glowing orb */
.hero-glow {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, var(--color-primary-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-block: var(--space-24);
}

/* Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary-bright);
  background: var(--color-primary-subtle);
  border: 1px solid color-mix(in srgb, var(--color-primary) 30%, transparent);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-8);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 6px #22c55e;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Hero title */
.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 700;
  line-height: 1;
  margin-bottom: var(--space-8);
  display: flex;
  flex-direction: column;
}

.hero-title-line { color: var(--color-text); }
.accent-line { color: var(--color-primary-bright); }

/* Hero subtitle */
.hero-subtitle {
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: var(--space-6);
  line-height: 1.5;
}

/* Hero meta */
.hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  margin-bottom: var(--space-10);
}
.hero-location {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-text-muted);
}
.hero-divider { opacity: 0.3; }

/* Hero actions */
.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Floating chips */
.hero-chips {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.chip {
  position: absolute;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  opacity: 0.7;
  animation: float linear infinite;
}

.chip-1 { top: 20%; right: 8%;  animation-duration: 8s;  animation-delay: 0s; }
.chip-2 { top: 35%; right: 4%;  animation-duration: 11s; animation-delay: -3s; }
.chip-3 { top: 55%; right: 10%; animation-duration: 9s;  animation-delay: -5s; }
.chip-4 { top: 70%; right: 5%;  animation-duration: 12s; animation-delay: -2s; }
.chip-5 { top: 80%; right: 15%; animation-duration: 10s; animation-delay: -7s; }

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-14px); }
}

/* Scroll hint */
.scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  animation: bounce 2.5s ease-in-out infinite;
  z-index: 2;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

@media (max-width: 768px) {
  .hero-chips { display: none; }
  .scroll-hint { display: none; }
}

/* ═══════════════════════════════════════════
   ABOUT
   ═══════════════════════════════════════════ */
.about-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-16);
  align-items: start;
}

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
}

.about-text .section-title { margin-bottom: var(--space-6); }

.about-body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-5);
}
.about-body:last-child { margin-bottom: 0; }

/* Stats */
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.stat-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.stat-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 20px var(--color-primary-glow);
}

.stat-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary-bright);
  line-height: 1;
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* ═══════════════════════════════════════════
   SKILLS
   ═══════════════════════════════════════════ */
.skills-section {
  background: var(--color-bg);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

@media (max-width: 1024px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .skills-grid { grid-template-columns: 1fr; }
}

.skill-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.skill-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 32px var(--color-primary-glow);
  transform: translateY(-3px);
}

.skill-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-subtle);
  border: 1px solid color-mix(in srgb, var(--color-primary) 25%, transparent);
  border-radius: var(--radius-lg);
  color: var(--color-primary-bright);
  flex-shrink: 0;
}

.skill-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
}

.skill-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  flex: 1;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
}

.skill-tags li {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary-bright);
  background: var(--color-primary-subtle);
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  max-width: none;
}

/* ═══════════════════════════════════════════
   EXPERIENCE
   ═══════════════════════════════════════════ */
.experience-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), transparent);
  border-radius: 2px;
  margin-left: 15px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: var(--space-6);
  align-items: start;
}

.timeline-marker {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  background: var(--color-bg);
  position: relative;
  z-index: 2;
  flex-shrink: 0;
  margin-top: 2px;
}

.timeline-item.featured .timeline-marker {
  background: var(--color-primary);
  box-shadow: 0 0 20px var(--color-primary-glow);
}

.timeline-content {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.timeline-item.featured .timeline-content {
  border-color: color-mix(in srgb, var(--color-primary) 30%, transparent);
}

.timeline-content:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 24px var(--color-primary-glow);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.timeline-role {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.timeline-company {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary-bright);
}

.timeline-date {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-faint);
  white-space: nowrap;
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}

.timeline-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.timeline-achievements {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.timeline-achievements li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
  line-height: 1.6;
  max-width: none;
}
.timeline-achievements li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary-bright);
  flex-shrink: 0;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.timeline-tags span {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-faint);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

@media (max-width: 640px) {
  .timeline-header { flex-direction: column; }
  .timeline-date { align-self: flex-start; }
}

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

.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.projects-grid .featured-project {
  grid-column: 1 / -1;
}

@media (max-width: 640px) {
  .projects-grid { grid-template-columns: 1fr; }
  .projects-grid .featured-project { grid-column: auto; }
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.project-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 32px var(--color-primary-glow);
  transform: translateY(-3px);
}

.featured-project {
  border-color: color-mix(in srgb, var(--color-primary) 25%, transparent);
}

.project-card-inner {
  display: flex;
  gap: var(--space-6);
  padding: var(--space-8);
  align-items: flex-start;
}

.featured-project .project-card-inner {
  gap: var(--space-8);
}

@media (max-width: 640px) {
  .project-card-inner { flex-direction: column; }
}

.project-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-subtle);
  border: 1px solid color-mix(in srgb, var(--color-primary) 25%, transparent);
  border-radius: var(--radius-xl);
  color: var(--color-primary-bright);
  flex-shrink: 0;
}

.project-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.project-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
}

.project-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.75;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.project-tags span {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary-bright);
  background: var(--color-primary-subtle);
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

/* ═══════════════════════════════════════════
   CONTACT
   ═══════════════════════════════════════════ */
.contact-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  position: relative;
  overflow: hidden;
}

.contact-inner {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.contact-glow {
  position: absolute;
  top: -50%;
  left: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(ellipse, var(--color-primary-glow) 0%, transparent 65%);
  pointer-events: none;
  z-index: 1;
}

.contact-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  line-height: 1.05;
}

.contact-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-12);
  max-width: 520px;
  line-height: 1.7;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-card {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-6) var(--space-8);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.contact-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 24px var(--color-primary-glow);
  transform: translateX(4px);
}
.contact-card.no-link {
  cursor: default;
  pointer-events: none;
}
.contact-card.no-link:hover { transform: none; }

.contact-card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-subtle);
  border: 1px solid color-mix(in srgb, var(--color-primary) 25%, transparent);
  border-radius: var(--radius-lg);
  color: var(--color-primary-bright);
  flex-shrink: 0;
}

.contact-card > div {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.contact-card-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.contact-card-value {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
}

.contact-arrow {
  color: var(--color-text-faint);
  flex-shrink: 0;
  transition: transform var(--transition-interactive), color var(--transition-interactive);
}
.contact-card:hover .contact-arrow {
  color: var(--color-primary-bright);
  transform: translateX(4px);
}

/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */
.footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-8);
}

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

.footer-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ═══════════════════════════════════════════
   SCROLL ANIMATIONS
   ═══════════════════════════════════════════ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* stagger children */
.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.stagger.visible > *:nth-child(1) { opacity:1; transform:none; transition-delay: 0ms; }
.stagger.visible > *:nth-child(2) { opacity:1; transform:none; transition-delay: 80ms; }
.stagger.visible > *:nth-child(3) { opacity:1; transform:none; transition-delay: 160ms; }
.stagger.visible > *:nth-child(4) { opacity:1; transform:none; transition-delay: 240ms; }
.stagger.visible > *:nth-child(5) { opacity:1; transform:none; transition-delay: 320ms; }
.stagger.visible > *:nth-child(6) { opacity:1; transform:none; transition-delay: 400ms; }

/* ─── System dark-mode fallback ─── */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:              #fafaf9;
    --color-surface:         #ffffff;
    --color-surface-2:       #f4f4f7;
    --color-surface-offset:  #eeeef4;
    --color-border:          #dddde8;
    --color-divider:         #e8e8f0;
    --color-text:            #12121a;
    --color-text-muted:      #5a5a78;
    --color-text-faint:      #aaaac0;
    --color-text-inverse:    #ffffff;
    --color-primary:         #7c3aed;
    --color-primary-bright:  #6d28d9;
    --color-primary-hover:   #6d28d9;
    --color-primary-active:  #5b21b6;
    --color-primary-glow:    rgba(124, 58, 237, 0.15);
    --color-primary-subtle:  rgba(124, 58, 237, 0.08);
    --shadow-sm:  0 1px 3px rgba(0,0,0,0.06);
    --shadow-md:  0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg:  0 12px 40px rgba(0,0,0,0.12);
    --shadow-glow: 0 0 40px rgba(124,58,237,0.15);
  }
}

/* ═══════════════════════════════════════════
   CERTIFICATIONS
   ═══════════════════════════════════════════ */
.certs-section {
  background: var(--color-bg);
  border-top: 1px solid var(--color-divider);
}

.certs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}

@media (max-width: 900px) {
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .certs-grid { grid-template-columns: 1fr; }
}

.cert-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5) var(--space-6);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.cert-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 20px var(--color-primary-glow);
}

.cert-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-subtle);
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  border-radius: var(--radius-md);
  color: var(--color-primary-bright);
  flex-shrink: 0;
}

.cert-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.cert-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
}

.cert-issuer {
  font-size: var(--text-xs);
  color: var(--color-primary-bright);
  font-weight: 500;
}

/* Education block */
.education-block {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-8);
  border-left: 3px solid var(--color-primary);
}

.edu-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-subtle);
  border-radius: var(--radius-md);
  color: var(--color-primary-bright);
  flex-shrink: 0;
}

.education-block > div {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.edu-degree {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
}

.edu-school {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ═══════════════════════════════════════════
   WORK SAMPLES SECTION
   ═══════════════════════════════════════════ */

.projects-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 640px;
  line-height: 1.7;
  margin-top: var(--space-4);
}

/* Grid — featured card spans full width, others sit side-by-side */
.samples-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.sample-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-interactive), border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.sample-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: 0 12px 40px rgba(124, 58, 237, 0.18);
}

.featured-sample {
  grid-column: 1 / -1;
  flex-direction: row;
}

/* ─── Preview panes ─── */
.sample-preview {
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

/* Featured card: preview is fixed-width sidebar */
.featured-sample .sample-preview {
  width: 420px;
  min-height: 300px;
}

/* Non-featured: preview is top strip */
.sample-card:not(.featured-sample) .sample-preview {
  width: 100%;
  height: 220px;
}

.excel-preview {
  background: #1a1a2e;
  display: flex;
  flex-direction: column;
}

.code-preview {
  background: #0f0f1a;
  display: flex;
  flex-direction: column;
}

.sql-preview {
  background: #0a1628;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: var(--space-4);
}

/* ─── Chrome bar (mock browser/app title bar) ─── */
.preview-chrome {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
}

.preview-chrome::before {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ff5f57;
  box-shadow: 14px 0 0 #febc2e, 28px 0 0 #28c840;
  flex-shrink: 0;
}

.chrome-title {
  font-size: 0.7rem;
  font-family: 'Satoshi', sans-serif;
  color: rgba(255,255,255,0.4);
  margin-left: var(--space-6);
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ─── Excel mock table ─── */
.excel-mock {
  width: 100%;
  font-size: 0.65rem;
  font-family: 'Satoshi', 'Consolas', monospace;
  color: rgba(255,255,255,0.75);
  display: flex;
  flex-direction: column;
}

.excel-header-row,
.excel-row,
.excel-formula-row {
  display: flex;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.excel-header-row > span,
.excel-row > span,
.excel-formula-row > span {
  flex: 1;
  padding: 4px 6px;
  border-right: 1px solid rgba(255,255,255,0.06);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.excel-header-row > span:last-child,
.excel-row > span:last-child,
.excel-formula-row > span:last-child {
  border-right: none;
}

.excel-header-row {
  background: rgba(124, 58, 237, 0.25);
}

.excel-header-row > span {
  color: rgba(255,255,255,0.9);
  font-weight: 600;
  font-size: 0.6rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.excel-row:nth-child(even) {
  background: rgba(255,255,255,0.02);
}

.excel-formula-row {
  background: rgba(124, 58, 237, 0.08);
  color: rgba(255,255,255,0.5);
}

.mono {
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.6rem;
  color: rgba(255,255,255,0.45);
}

.tag-cell {
  color: #a78bfa;
  font-weight: 500;
}

.price-cell {
  color: #34d399;
  font-weight: 600;
}

.yes-cell {
  color: #60a5fa;
}

.formula-label {
  color: rgba(255,255,255,0.3);
  font-size: 0.58rem;
}

.formula-val {
  color: #f472b6;
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.6rem;
}

/* ─── Code mock ─── */
.code-mock {
  padding: var(--space-4) var(--space-5);
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.7rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.7);
  overflow: hidden;
  flex: 1;
}

.code-line {
  display: block;
  white-space: pre;
}

.code-indent {
  padding-left: 1.5em;
}

.code-fade {
  opacity: 0.35;
}

.code-comment { color: #6b7280; }
.code-key     { color: #a78bfa; }
.code-sep     { color: rgba(255,255,255,0.4); }
.code-str     { color: #34d399; }
.code-val     { color: #f472b6; }
.code-kw      { color: #60a5fa; font-weight: 600; }
.code-type    { color: #fbbf24; }

/* ─── Info pane ─── */
.sample-info {
  padding: var(--space-6) var(--space-7);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  flex: 1;
  min-width: 0;
}

.sample-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
}

.badge-green  { background: rgba(52,211,153,0.12);  border-color: rgba(52,211,153,0.3);  color: #34d399; }
.badge-blue   { background: rgba(96,165,250,0.12);  border-color: rgba(96,165,250,0.3);  color: #60a5fa; }
.badge-purple { background: rgba(167,139,250,0.12); border-color: rgba(167,139,250,0.3); color: #a78bfa; }
.badge-yellow { background: rgba(251,191,36,0.12);  border-color: rgba(251,191,36,0.3);  color: #fbbf24; }
.badge-red    { background: rgba(248,113,113,0.12); border-color: rgba(248,113,113,0.3); color: #f87171; }

.sample-title {
  font-family: 'Clash Display', 'Satoshi', sans-serif;
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  margin: 0;
}

.sample-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin: 0;
}

.sample-meta {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.sample-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.sample-dl {
  align-self: flex-start;
  margin-top: auto;
  font-size: var(--text-xs) !important;
  padding: var(--space-3) var(--space-5) !important;
}

/* ─── SQL screenshot ─── */
.sample-screenshot-wrap {
  margin-top: var(--space-2);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
}

.sample-screenshot {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .featured-sample {
    flex-direction: column;
  }

  .featured-sample .sample-preview {
    width: 100%;
    min-height: 200px;
  }
}

@media (max-width: 640px) {
  .samples-grid {
    grid-template-columns: 1fr;
  }

  .featured-sample {
    grid-column: 1;
  }

  .sample-info {
    padding: var(--space-5);
  }
}