/* ============================================================
   STYLE.CSS — Bo Li Athletic Therapy Portfolio
   Art direction: clean/clinical precision + warm human touch
   Palette: deep navy (authority) + warm teal (health/vitality)
   Fonts: Instrument Serif (display) + Satoshi (body/UI)
   ============================================================ */

/* ── GOOGLE FONTS & FONTSHARE ── */
@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&display=swap');

/* ── DESIGN TOKENS ── */
:root, [data-theme='light'] {
  /* Surfaces */
  --color-bg:              #f8f7f4;
  --color-surface:         #ffffff;
  --color-surface-2:       #f4f2ee;
  --color-surface-offset:  #ece9e4;
  --color-divider:         #dbd8d2;
  --color-border:          #d0ccc5;

  /* Text */
  --color-text:            #1a1917;
  --color-text-muted:      #6b6965;
  --color-text-faint:      #b0ada8;
  --color-text-inverse:    #f8f7f4;

  /* Primary — deep teal */
  --color-primary:         #0e6b72;
  --color-primary-hover:   #0a5259;
  --color-primary-active:  #063b40;
  --color-primary-highlight: #c6dcde;

  /* Accent — warm navy */
  --color-accent:          #1b3a5c;
  --color-accent-hover:    #142d48;
  --color-accent-light:    #d3dce8;

  /* Score / success */
  --color-success:         #2d7a4f;
  --color-success-highlight: #cde4d8;

  /* Radii */
  --radius-sm:  0.375rem;
  --radius-md:  0.625rem;
  --radius-lg:  1rem;
  --radius-xl:  1.5rem;
  --radius-full:9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm:  0 1px 3px oklch(0.18 0.02 220 / 0.07);
  --shadow-md:  0 4px 16px oklch(0.18 0.02 220 / 0.10);
  --shadow-lg:  0 12px 40px oklch(0.18 0.02 220 / 0.14);

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

  /* 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(3rem,     0.5rem  + 7vw,    8rem);

  /* 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;

  /* Fonts */
  --font-display: 'Instrument Serif', 'Georgia', serif;
  --font-body:    'Satoshi', 'Inter', 'Helvetica Neue', sans-serif;
}

[data-theme='dark'] {
  --color-bg:              #111210;
  --color-surface:         #171815;
  --color-surface-2:       #1d1e1b;
  --color-surface-offset:  #222320;
  --color-divider:         #2e2f2b;
  --color-border:          #3a3b37;
  --color-text:            #e4e2de;
  --color-text-muted:      #8a8884;
  --color-text-faint:      #565753;
  --color-text-inverse:    #111210;
  --color-primary:         #4fa8b0;
  --color-primary-hover:   #3a9099;
  --color-primary-active:  #2a727a;
  --color-primary-highlight:#1e3a3d;
  --color-accent:          #6a9ecf;
  --color-accent-hover:    #5489ba;
  --color-accent-light:    #1e2e3d;
  --color-success:         #5aaa7a;
  --color-success-highlight:#1a3327;
  --shadow-sm:  0 1px 3px oklch(0 0 0 / 0.2);
  --shadow-md:  0 4px 16px oklch(0 0 0 / 0.3);
  --shadow-lg:  0 12px 40px oklch(0 0 0 / 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #111210;
    --color-surface:         #171815;
    --color-surface-2:       #1d1e1b;
    --color-surface-offset:  #222320;
    --color-divider:         #2e2f2b;
    --color-border:          #3a3b37;
    --color-text:            #e4e2de;
    --color-text-muted:      #8a8884;
    --color-text-faint:      #565753;
    --color-text-inverse:    #111210;
    --color-primary:         #4fa8b0;
    --color-primary-hover:   #3a9099;
    --color-primary-active:  #2a727a;
    --color-primary-highlight:#1e3a3d;
    --color-accent:          #6a9ecf;
    --color-accent-hover:    #5489ba;
    --color-accent-light:    #1e2e3d;
    --color-success:         #5aaa7a;
    --color-success-highlight:#1a3327;
    --shadow-sm:  0 1px 3px oklch(0 0 0 / 0.2);
    --shadow-md:  0 4px 16px oklch(0 0 0 / 0.3);
    --shadow-lg:  0 12px 40px oklch(0 0 0 / 0.4);
  }
}

/* ── FONT LOADING (Satoshi via CDN) ── */
@font-face {
  font-family: 'Satoshi';
  src: url('https://api.fontshare.com/v2/css?f[]=satoshi@400,500,700&display=swap') format('woff2');
  font-display: swap;
}

/* ── LAYOUT UTILITIES ── */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}
.container--narrow { max-width: var(--content-default); }
.container--text   { max-width: var(--content-narrow); }

/* ── HEADER / NAV ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklch, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-interactive);
}
.site-header--scrolled { box-shadow: var(--shadow-sm); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: var(--space-8);
}

/* Logo SVG */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1;
}
.nav-logo-text span { color: var(--color-primary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}
.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.nav-links a:hover { color: var(--color-text); background: var(--color-surface-2); }
.nav-links a.active { color: var(--color-primary); background: var(--color-primary-highlight); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover { color: var(--color-text); background: var(--color-surface-2); }

/* Mobile nav toggle */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 38px; height: 38px;
  gap: 5px;
  border-radius: var(--radius-md);
  color: var(--color-text);
}
.nav-hamburger span {
  width: 22px; height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.25s var(--ease-out), opacity 0.2s;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-divider);
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.nav-mobile a:hover { color: var(--color-text); background: var(--color-surface-2); }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
}

/* ── HERO SECTION ── */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--color-accent);
  min-height: clamp(520px, 70vh, 780px);
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, oklch(0.18 0.06 220 / 0.82), oklch(0.22 0.08 200 / 0.75)),
    url('./assets/hero-bg.webp') center/cover no-repeat;
}
.hero-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image:
    linear-gradient(var(--color-text-inverse) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-text-inverse) 1px, transparent 1px);
  background-size: 40px 40px;
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  padding-block: var(--space-20);
}
.hero-content { max-width: 560px; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: oklch(from var(--color-primary) l c h / 0.15);
  border: 1px solid oklch(from var(--color-primary) l c h / 0.3);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}
.hero-name {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  color: #ffffff;
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}
.hero-name .chinese {
  display: block;
  font-size: var(--text-3xl);
  color: oklch(from var(--color-primary) 0.75 0.08 195);
  font-style: italic;
  margin-top: var(--space-2);
}
.hero-title {
  font-size: var(--text-lg);
  font-weight: 500;
  color: oklch(0.85 0.02 210);
  margin-bottom: var(--space-8);
  line-height: 1.5;
}
.hero-cta-row {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-outline {
  background: transparent;
  color: #ffffff;
  border: 1.5px solid rgba(255,255,255,0.4);
}
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.7); }

/* Hero stats card */
.hero-card {
  background: oklch(1 0 0 / 0.07);
  border: 1px solid oklch(1 0 0 / 0.15);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  backdrop-filter: blur(12px);
}
.hero-card-title {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: oklch(0.75 0.05 195);
  margin-bottom: var(--space-6);
}
.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}
.hero-stat {}
.hero-stat-score {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: #ffffff;
  line-height: 1;
  margin-bottom: var(--space-1);
}
.hero-stat-score .unit { font-size: var(--text-lg); opacity: 0.7; }
.hero-stat-label {
  font-size: var(--text-xs);
  color: oklch(0.75 0.03 200);
  line-height: 1.4;
  max-width: 30ch;
}
.hero-stat-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-success);
  background: oklch(from var(--color-success) l c h / 0.15);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-top: var(--space-2);
}
.hero-divider {
  height: 1px;
  background: oklch(1 0 0 / 0.12);
  margin: var(--space-5) 0;
  grid-column: 1 / -1;
}
.hero-stat-wide {
  grid-column: 1 / -1;
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: var(--space-10); }
  .hero-card { max-width: 480px; }
}
@media (max-width: 480px) {
  .hero-stats { grid-template-columns: 1fr; }
}

/* ── SECTION SHARED ── */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}
.section-alt { background: var(--color-surface-2); }
.section-dark {
  background: var(--color-accent);
  color: var(--color-text-inverse);
}

.section-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-5);
}
.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.7;
  margin-bottom: var(--space-12);
}

/* ── ACHIEVEMENTS SECTION ── */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-10);
}
.achievement-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive), border-color var(--transition-interactive);
}
.achievement-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary);
}
.achievement-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}
.achievement-icon {
  width: 44px; height: 44px;
  background: var(--color-primary-highlight);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  color: var(--color-primary);
}
.achievement-score {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--color-text);
  line-height: 1;
  margin-bottom: var(--space-2);
}
.achievement-score span {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}
.achievement-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.4;
}
.achievement-context {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}
.achievement-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-success);
  background: var(--color-success-highlight);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-top: var(--space-3);
}

@media (max-width: 768px) {
  .achievements-grid { grid-template-columns: 1fr; }
}
@media (min-width: 600px) and (max-width: 900px) {
  .achievements-grid { grid-template-columns: 1fr 1fr; }
}

/* Clinic banner */
.clinic-banner {
  background: linear-gradient(135deg, var(--color-accent), oklch(0.28 0.12 195));
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-10);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  flex-wrap: wrap;
}
.clinic-banner-text {}
.clinic-banner-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: #ffffff;
  margin-bottom: var(--space-2);
}
.clinic-banner-sub {
  font-size: var(--text-sm);
  color: oklch(0.82 0.04 200);
}
.clinic-hours-row {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
}
.clinic-hour-item { text-align: center; }
.clinic-hour-num {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: #ffffff;
  line-height: 1;
}
.clinic-hour-label {
  font-size: var(--text-xs);
  color: oklch(0.72 0.04 200);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ── COMPETENCIES (tabbed) ── */
.competency-tabs {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-divider);
  padding-bottom: var(--space-3);
}
.competency-tab {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  cursor: pointer;
  border: 1.5px solid transparent;
  background: none;
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive);
}
.competency-tab:hover { color: var(--color-text); background: var(--color-surface-2); }
.competency-tab.active {
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  border-color: var(--color-primary);
}
.competency-panel { display: none; }
.competency-panel.active { display: block; }

.competency-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-5);
}
.comp-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.comp-card:hover { box-shadow: var(--shadow-sm); border-color: var(--color-primary); }
.comp-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}
.comp-course {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.comp-grade {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-success);
  background: var(--color-success-highlight);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}
.comp-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.4;
}
.comp-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.comp-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}
.comp-level {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}
.level-foundational       { background: #ede9e3; color: #6b5c47; }
.level-developing     { background: #e3ecf3; color: #2d5878; }
.level-competent     { background: #e3f0ea; color: #2d6e4e; }
.level-proficient    { background: #e8e3f3; color: #5038a0; }
.comp-date { font-size: var(--text-xs); color: var(--color-text-faint); }

[data-theme='dark'] .level-foundational    { background: #2a2520; color: #c4aa88; }
[data-theme='dark'] .level-developing  { background: #1a2530; color: #7aaece; }
[data-theme='dark'] .level-competent  { background: #1a2e22; color: #6dc491; }
[data-theme='dark'] .level-proficient { background: #221a35; color: #b09cde; }

/* ── ABOUT / BIO SECTION ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: var(--space-16);
  align-items: start;
}
.about-sidebar {}
.about-avatar-wrap {
  width: 100%;
  aspect-ratio: 4/5;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary-highlight), var(--color-accent-light));
  position: relative;
  margin-bottom: var(--space-6);
}
.about-avatar-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about-avatar-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  color: var(--color-primary);
}
.about-avatar-initials {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-style: italic;
  color: var(--color-primary);
  line-height: 1;
  opacity: 0.6;
}
.about-quick-facts {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.about-fact {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.about-fact-icon {
  width: 32px; height: 32px;
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
}
.about-content {}
.about-lead {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: var(--space-6);
  max-width: 55ch;
}
.about-body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-6);
  max-width: 65ch;
}
.about-credentials {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}
.cred-badge {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid color-mix(in oklch, var(--color-accent) 20%, transparent);
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-avatar-wrap { max-width: 280px; aspect-ratio: 1; }
}

/* ── TIMELINE (Education / Experience) ── */
.timeline {
  position: relative;
  padding-left: var(--space-10);
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: var(--space-3); bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-divider));
}
.timeline-item {
  position: relative;
  margin-bottom: var(--space-10);
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-10) - 1px + 5px);
  top: 5px;
  width: 12px; height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-primary);
}
.timeline-period {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.timeline-title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.timeline-org {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}
.timeline-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 60ch;
}

/* ── SKILLS SECTION ── */
.skills-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
}
.skill-group {}
.skill-group-title {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}
.skill-item {
  margin-bottom: var(--space-4);
}
.skill-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}
.skill-name { font-size: var(--text-sm); font-weight: 500; color: var(--color-text); }
.skill-pct  { font-size: var(--text-xs); font-weight: 700; color: var(--color-primary); }
.skill-bar  {
  height: 4px;
  background: var(--color-surface-offset);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.skill-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-full);
  transform-origin: left;
  animation: fillBar 1.2s var(--ease-out) both;
  animation-play-state: paused;
}
@keyframes fillBar { from { transform: scaleX(0); } to { transform: scaleX(1); } }

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

/* ── CONTACT SECTION ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}
.contact-info {}
.contact-info-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.contact-info-body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 50ch;
}
.contact-links { display: flex; flex-direction: column; gap: var(--space-3); }
.contact-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: color var(--transition-interactive), border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.contact-link:hover { color: var(--color-primary); border-color: var(--color-primary); box-shadow: var(--shadow-sm); }
.contact-link-icon {
  width: 36px; height: 36px;
  background: var(--color-primary-highlight);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

/* Contact form */
.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}
.form-row { margin-bottom: var(--space-5); }
.form-label { display: block; font-size: var(--text-sm); font-weight: 600; color: var(--color-text); margin-bottom: var(--space-2); }
.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.form-input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.15); }
textarea.form-input { resize: vertical; min-height: 120px; }
.form-submit {
  width: 100%;
  background: var(--color-primary);
  color: #ffffff;
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: background var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.form-submit:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.form-submit:active { transform: translateY(0); }

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* ── FOOTER ── */
.site-footer {
  background: var(--color-accent);
  color: oklch(0.75 0.03 200);
  padding-block: var(--space-12) var(--space-8);
  margin-top: 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-6);
}
.footer-brand {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: #ffffff;
}
.footer-brand span { color: var(--color-primary); }
.footer-meta {
  font-size: var(--text-xs);
  color: oklch(0.6 0.03 200);
  text-align: right;
}
.footer-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}
.footer-links a {
  font-size: var(--text-sm);
  color: oklch(0.72 0.03 200);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-links a:hover { color: #ffffff; }

/* ── SCROLL ANIMATIONS ── */
.fade-in { opacity: 1; }
@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
}
@keyframes reveal-fade { to { opacity: 1; } }

/* ── SECTION IMAGE BANNERS ── */
.section-image-banner {
  width: 100%;
  height: clamp(200px, 25vw, 340px);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-12);
  position: relative;
}
.section-image-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.section-image-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, oklch(from var(--color-bg) l c h / 0.6));
  pointer-events: none;
}

.ai-image-note {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  background: var(--color-surface-offset);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  position: absolute;
  bottom: var(--space-3);
  right: var(--space-3);
  z-index: 2;
}

/* ── YH LOGO BADGE ── */
.yh-logo-corner {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  z-index: 90;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
  text-decoration: none;
}
.yh-logo-corner:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.yh-logo-corner img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
[data-theme='dark'] .yh-logo-light { display: none; }
[data-theme='dark'] .yh-logo-dark  { display: block; }
[data-theme='light'] .yh-logo-light,
:root:not([data-theme]) .yh-logo-light { display: block; }
[data-theme='light'] .yh-logo-dark,
:root:not([data-theme]) .yh-logo-dark { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .yh-logo-light { display: none; }
  :root:not([data-theme]) .yh-logo-dark  { display: block; }
}

.footer-yh-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.footer-yh-logo img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}
.footer-yh-logo-text {
  font-size: var(--text-xs);
  color: oklch(0.6 0.03 200);
}

/* ── MISC UTILITIES ── */
.divider {
  height: 1px;
  background: var(--color-divider);
  margin-block: var(--space-12);
}
.text-primary { color: var(--color-primary); }
.font-display { font-family: var(--font-display); }