/* =============================================================================
   Eric Chiu — Cloud Resume
   Architecture: BEM naming, design tokens, motion-safe, accessible
   ============================================================================= */

/* ── 1. Design Tokens ──────────────────────────────────────────────────────── */
:root {
  /* Color palette */
  --color-primary:      #667eea;
  --color-primary-dark: #764ba2;
  --color-accent:       #f5576c;
  --color-accent-alt:   #f093fb;
  --color-cyan:         #00f2fe;
  --color-gold:         #ffd700;

  /* Surface colors */
  --color-bg-page:      #f0f2f5;
  --color-surface:      #ffffff;
  --color-surface-alt:  #f8f9fa;
  --color-surface-dark: #2c3e50;
  --color-border:       #e9ecef;

  /* Text */
  --color-text:         #2c3e50;
  --color-text-muted:   #6c757d;
  --color-text-light:   #ffffff;

  /* Brand gradients */
  --gradient-primary:   linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  --gradient-accent:    linear-gradient(135deg, var(--color-accent-alt) 0%, var(--color-accent) 100%);
  --gradient-dark:      linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
  --gradient-footer:    linear-gradient(135deg, #2c3e50 0%, #34495e 100%);

  /* Shadows */
  --shadow-sm:   0 2px  8px  rgba(0, 0, 0, 0.06);
  --shadow-md:   0 8px  24px rgba(0, 0, 0, 0.10);
  --shadow-lg:   0 20px 40px rgba(0, 0, 0, 0.14);
  --shadow-card: 0 4px  16px rgba(102, 126, 234, 0.12);

  /* Spacing scale (4px base) */
  --space-1:  4px;
  --space-2:  8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Typography */
  --font-base: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  /* Borders */
  --radius-sm:   8px;
  --radius-md:   16px;
  --radius-lg:   24px;
  --radius-pill: 999px;

  /* Motion */
  --ease-out:     cubic-bezier(0.0, 0.0, 0.2, 1);
  --ease-in-out:  cubic-bezier(0.4, 0.0, 0.2, 1);
  --duration-fast:   200ms;
  --duration-base:   300ms;
  --duration-slow:   600ms;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-base);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--gradient-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated background particles */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="g" cx="50%25" cy="50%25" r="50%25"><stop offset="0%25" style="stop-color:rgba(255,255,255,0.12)"/><stop offset="100%25" style="stop-color:rgba(255,255,255,0)"/></radialGradient></defs><circle cx="100" cy="100" r="3" fill="url(%23g)"><animate attributeName="cy" values="100;900;100" dur="20s" repeatCount="indefinite"/></circle><circle cx="300" cy="300" r="2" fill="url(%23g)"><animate attributeName="cy" values="300;100;300" dur="15s" repeatCount="indefinite"/></circle><circle cx="500" cy="200" r="4" fill="url(%23g)"><animate attributeName="cy" values="200;800;200" dur="25s" repeatCount="indefinite"/></circle><circle cx="700" cy="400" r="2" fill="url(%23g)"><animate attributeName="cy" values="400;50;400" dur="18s" repeatCount="indefinite"/></circle><circle cx="900" cy="150" r="3" fill="url(%23g)"><animate attributeName="cy" values="150;950;150" dur="22s" repeatCount="indefinite"/></circle></svg>');
  pointer-events: none;
  z-index: -1;
  opacity: 0.5;
}

/* ── 3. Focus & Accessibility ───────────────────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Skip link for keyboard users */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-light);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 10000;
  transition: top var(--duration-fast) var(--ease-out);
}
.skip-link:focus { top: var(--space-4); }

/* ── 4. Loading Screen ──────────────────────────────────────────────────────── */
.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--gradient-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity var(--duration-slow) var(--ease-out);
}

.loading-screen.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-screen__spinner {
  width: 56px;
  height: 56px;
  border: 3px solid rgba(255, 255, 255, 0.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── 5. Layout Container ────────────────────────────────────────────────────── */
.container {
  max-width: 900px;
  margin: var(--space-10) auto;
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  animation: container-enter 0.8s var(--ease-out) both;
}

@keyframes container-enter {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── 6. Header ──────────────────────────────────────────────────────────────── */
.header {
  background: var(--gradient-dark);
  color: var(--color-text-light);
  padding: var(--space-16) var(--space-10);
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Animated grid overlay */
.header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M20 0L0 0 0 20" fill="none" stroke="rgba(255,255,255,0.07)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  animation: grid-drift 24s linear infinite;
  pointer-events: none;
}

@keyframes grid-drift {
  from { transform: translate(0, 0); }
  to   { transform: translate(20px, 20px); }
}

/* Decorative orb */
.header::after {
  content: '';
  position: absolute;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  top: -80px;
  right: -60px;
  pointer-events: none;
  animation: orb-float 8s ease-in-out infinite;
}

@keyframes orb-float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-16px); }
}

.header__content {
  position: relative;
  z-index: 1;
  margin-bottom: var(--space-10);
}

.header__name {
  font-size: var(--text-5xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(45deg, #fff 0%, #c8d9ff 50%, #fff 100%);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: name-shimmer 4s ease-in-out infinite alternate;
  margin-bottom: var(--space-3);
}

@keyframes name-shimmer {
  from { background-position: 0% 50%; }
  to   { background-position: 100% 50%; }
}

.header__title {
  font-size: var(--text-xl);
  font-weight: 300;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-4);
  animation: slide-from-right 0.7s var(--ease-out) 0.3s both;
}

.header__tagline {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.6);
  font-style: italic;
  max-width: 560px;
  margin: 0 auto;
  animation: slide-from-left 0.7s var(--ease-out) 0.5s both;
}

@keyframes slide-from-right {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slide-from-left {
  from { opacity: 0; transform: translateX(-20px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ── 7. Contact Bar ─────────────────────────────────────────────────────────── */
.contact-bar {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

.contact-bar__item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-pill);
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition:
    background var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out);
}

.contact-bar__item:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
}

.contact-bar__item i {
  color: var(--color-cyan);
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.contact-bar__item--static {
  cursor: default;
}
.contact-bar__item--static:hover { transform: none; }

/* ── 8. Sections ────────────────────────────────────────────────────────────── */
.section {
  padding: var(--space-12) var(--space-10);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.section:last-child { border-bottom: none; }

/* Hover sweep */
.section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.04), transparent);
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out);
  pointer-events: none;
}

.section:hover::before { opacity: 1; }

.section__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
  position: relative;
}

/* Animated underline accent */
.section__title::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width var(--duration-slow) var(--ease-out);
}
.section:hover .section__title::after { width: 100%; }

.section__title--light {
  color: var(--color-text-light);
  border-bottom-color: rgba(255, 255, 255, 0.3);
}
.section__title--light::after { background: rgba(255, 255, 255, 0.6); }

/* ── 9. Summary ─────────────────────────────────────────────────────────────── */
.summary {
  color: var(--color-text-muted);
  line-height: 1.75;
  font-size: var(--text-lg);
}

/* ── 10. Skills Grid ────────────────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
}

.skill-card {
  background: linear-gradient(145deg, var(--color-surface-alt), #e9ecef);
  padding: var(--space-8);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary);
  position: relative;
  overflow: hidden;
  transition:
    transform var(--duration-slow) var(--ease-out),
    box-shadow var(--duration-slow) var(--ease-out),
    border-color var(--duration-slow) var(--ease-out);
}

/* Conic gradient: only animates on hover (performance fix) */
.skill-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(from 0deg, transparent, rgba(102, 126, 234, 0.12), transparent);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
  pointer-events: none;
}

.skill-card:hover::before {
  opacity: 1;
  animation: card-rotate 4s linear infinite;
}

@keyframes card-rotate {
  to { transform: rotate(360deg); }
}

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

.skill-card__title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  position: relative;
  z-index: 1;
}

.skill-card__list {
  list-style: none;
  position: relative;
  z-index: 1;
}

.skill-card__list li {
  padding: var(--space-2) 0 var(--space-2) var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  position: relative;
  transition: color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}

.skill-card__list li::before {
  content: '◆';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-size: 0.6em;
  top: 0.45em;
  transition: color var(--duration-fast) var(--ease-out);
}

.skill-card:hover .skill-card__list li { color: var(--color-text); }
.skill-card:hover .skill-card__list li::before { color: var(--color-accent); }

/* ── 11. Project Cards ──────────────────────────────────────────────────────── */
.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
  position: relative;
  overflow: hidden;
  transition:
    transform var(--duration-slow) var(--ease-out),
    box-shadow var(--duration-slow) var(--ease-out),
    border-color var(--duration-slow) var(--ease-out);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle at 100% 0%, rgba(245, 87, 108, 0.08), transparent 70%);
  transition: width var(--duration-slow) var(--ease-out), height var(--duration-slow) var(--ease-out);
  pointer-events: none;
}

.project-card:hover::before {
  width: 240px;
  height: 240px;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--color-primary);
}

.project-card__header {
  margin-bottom: var(--space-5);
}

.project-card__title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.project-card__title i {
  color: var(--color-accent);
  transition: color var(--duration-base) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

.project-card:hover .project-card__title i {
  color: var(--color-primary);
  transform: rotate(10deg) scale(1.1);
}

.project-card__badge {
  font-size: var(--text-xs);
  font-weight: 600;
  background: var(--gradient-primary);
  color: var(--color-text-light);
  padding: 2px var(--space-3);
  border-radius: var(--radius-pill);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

.tag {
  display: inline-block;
  background: var(--gradient-primary);
  color: var(--color-text-light);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
  transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);
  position: relative;
  overflow: hidden;
}

/* Shimmer effect on tag hover */
.tag::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: translateX(-100%);
  transition: transform var(--duration-slow) var(--ease-out);
}

.tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.35);
}

.tag:hover::after { transform: translateX(100%); }

.project-card__description {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.project-card__highlights {
  list-style: none;
  margin-bottom: var(--space-6);
}

.project-card__highlights li {
  padding: var(--space-2) 0 var(--space-2) var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  position: relative;
}

.project-card__highlights li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.project-card__highlights code {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2px var(--space-2);
  font-size: var(--text-xs);
  font-family: 'Menlo', 'Consolas', monospace;
  color: var(--color-accent);
}

.project-card__links {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* ── 12. Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  transition:
    background var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.btn--outline {
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  background: transparent;
  position: relative;
  overflow: hidden;
  z-index: 0;
}

.btn--outline::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-primary);
  transform: translateX(-101%);
  transition: transform var(--duration-base) var(--ease-out);
  z-index: -1;
}

.btn--outline:hover {
  color: var(--color-text-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(102, 126, 234, 0.3);
}

.btn--outline:hover::before { transform: translateX(0); }

/* ── 13. Experience Card ────────────────────────────────────────────────────── */
.experience-card {
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  border-left: 4px solid var(--color-primary);
}

.experience-card__header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.experience-card__role {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
}

.experience-card__company {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 600;
}

.experience-card__duration {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-left: auto;
}

.experience-card__details {
  list-style: none;
}

.experience-card__details li {
  padding: var(--space-2) 0 var(--space-2) var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  position: relative;
}

.experience-card__details li::before {
  content: '◆';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-size: 0.55em;
  top: 0.5em;
}

/* ── 14. Education & Certifications ────────────────────────────────────────── */
.education-card {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary);
  margin-bottom: var(--space-8);
}

.education-card__degree {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
}

.education-card__institution {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 600;
}

.education-card__year {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-left: auto;
}

.certifications__title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

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

.certifications__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
}

.certifications__item--earned {
  background: rgba(52, 199, 89, 0.08);
  border: 1px solid rgba(52, 199, 89, 0.25);
  color: var(--color-text);
}

.certifications__item--earned i { color: #34c759; }

.certifications__item--progress {
  background: rgba(255, 149, 0, 0.08);
  border: 1px solid rgba(255, 149, 0, 0.25);
  color: var(--color-text);
}

.certifications__item--progress i { color: #ff9500; }

/* ── 15. Visitor Counter ────────────────────────────────────────────────────── */
.visitor-counter {
  background: var(--gradient-primary);
  color: var(--color-text-light);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.visitor-counter::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><defs><radialGradient id="r" cx="50%25" cy="50%25" r="50%25"><stop offset="0%25" style="stop-color:rgba(255,255,255,0.08)"/><stop offset="100%25" style="stop-color:transparent"/></radialGradient></defs><circle cx="50" cy="50" r="20" fill="url(%23r)"><animate attributeName="r" values="20;40;20" dur="4s" repeatCount="indefinite"/></circle><circle cx="150" cy="150" r="15" fill="url(%23r)"><animate attributeName="r" values="15;30;15" dur="3s" repeatCount="indefinite"/></circle></svg>');
  pointer-events: none;
}

.counter-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-10) 0;
  padding: var(--space-8) var(--space-10);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  position: relative;
  z-index: 1;
}

.counter-display__label {
  font-size: var(--text-lg);
  opacity: 0.9;
}

.counter-display__number {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 900;
  color: var(--color-gold);
  letter-spacing: -0.02em;
  animation: counter-pulse 3s ease-in-out infinite;
  display: block;
}

@keyframes counter-pulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.04); }
}

.counter-display__note {
  font-size: var(--text-sm);
  opacity: 0.7;
  font-style: italic;
  position: relative;
  z-index: 1;
}

/* ── 16. Footer ─────────────────────────────────────────────────────────────── */
.footer {
  background: var(--gradient-footer);
  color: var(--color-text-light);
  padding: var(--space-10) var(--space-10);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.footer__copy {
  position: relative;
  z-index: 1;
  font-size: var(--text-sm);
  opacity: 0.7;
  margin-bottom: var(--space-6);
}

.footer__links {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  gap: var(--space-5);
}

.footer__link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-xl);
  text-decoration: none;
  transition:
    background var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.footer__link:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(52, 152, 219, 0.3);
}

/* ── 17. Scroll Animations ──────────────────────────────────────────────────── */
.fade-in-up {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

.fade-in-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── 18. Custom Scrollbar ───────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg-page); }
::-webkit-scrollbar-thumb {
  background: var(--gradient-primary);
  border-radius: var(--radius-pill);
}

/* ── 19. Selection ──────────────────────────────────────────────────────────── */
::selection {
  background: rgba(102, 126, 234, 0.25);
  color: var(--color-text);
}

/* ── 20. Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .container { margin: var(--space-4); border-radius: var(--radius-md); }
  .header { padding: var(--space-12) var(--space-6); }
  .header__name { font-size: var(--text-4xl); }
  .section { padding: var(--space-10) var(--space-6); }
  .skills-grid { grid-template-columns: 1fr; }
  .counter-display { padding: var(--space-6); }
  .footer { padding: var(--space-8) var(--space-6); }
  .project-card__links { flex-direction: column; }
  .experience-card__header { flex-direction: column; gap: var(--space-1); }
  .experience-card__duration { margin-left: 0; }
}

@media (max-width: 480px) {
  .header__name { font-size: var(--text-3xl); }
  .contact-bar { flex-direction: column; align-items: center; }
  .project-card { padding: var(--space-6); }
  .tag { font-size: 0.7rem; }
}

/* ── 21. Reduced Motion ─────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  body::before { display: none; }
  .container { animation: none; }
  .header__name { animation: none; -webkit-text-fill-color: #fff; }
  .header::after { animation: none; }
  .header::before { animation: none; }
  .loading-screen__spinner { animation: none; border-color: rgba(255,255,255,0.5); }
}

/* ── 22. Counter Final State (set via JS class, not inline style) ─────────── */
.counter-display__number--final {
  background: linear-gradient(45deg, var(--color-gold), #ffa500, var(--color-gold));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: counter-gold-shimmer 3s ease-in-out infinite alternate;
}

@keyframes counter-gold-shimmer {
  from { background-position: 0% 50%; }
  to   { background-position: 100% 50%; }
}

/* ── 23. Typing Cursor ──────────────────────────────────────────────────────── */
.typing-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: rgba(255, 255, 255, 0.7);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: cursor-blink 0.8s steps(1) infinite;
}

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