/* style.css */

/* ─── DESIGN TOKENS ─────────────────────────────────────────────────────── */
:root {
  --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,    7.5rem);

  --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-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:     cubic-bezier(0.4, 0, 1, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;

  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body:    'Satoshi', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ─── LIGHT THEME ──────────────────────────────────────────────────────── */
:root, [data-theme="light"] {
  --color-bg:             #ffffff;
  --color-surface:        #fafafa;
  --color-surface-2:      #f5f5f5;
  --color-surface-offset: #f0f0f0;
  --color-divider:        #e8e8e8;
  --color-border:         #e0e0e0;

  --color-text:           #111111;
  --color-text-muted:     #666666;
  --color-text-faint:     #aaaaaa;
  --color-text-inverse:   #ffffff;

  --color-primary:        #2563eb;
  --color-primary-hover:  #1d4ed8;
  --color-primary-active: #1e40af;
  --color-primary-light:  #eff6ff;
  --color-primary-subtle: #dbeafe;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10), 0 4px 12px rgba(0, 0, 0, 0.06);
}

/* ─── DARK THEME ───────────────────────────────────────────────────────── */
[data-theme="dark"] {
  --color-bg:             #0a0a0a;
  --color-surface:        #111111;
  --color-surface-2:      #1a1a1a;
  --color-surface-offset: #1f1f1f;
  --color-divider:        #2a2a2a;
  --color-border:         #333333;

  --color-text:           #ededed;
  --color-text-muted:     #888888;
  --color-text-faint:     #555555;
  --color-text-inverse:   #0a0a0a;

  --color-primary:        #60a5fa;
  --color-primary-hover:  #93c5fd;
  --color-primary-active: #bfdbfe;
  --color-primary-light:  #1e2a3b;
  --color-primary-subtle: #172033;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.30);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.40);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.50);
}

/* ─── LAYOUT ───────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(var(--space-5), 5vw, var(--space-16));
  padding-right: clamp(var(--space-5), 5vw, var(--space-16));
}

.container--wide { max-width: var(--content-wide); }

/* ─── HEADER ───────────────────────────────────────────────────────────── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding-top: var(--space-5);
  padding-bottom: var(--space-5);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  backdrop-filter: blur(16px) saturate(180%);
  background-color: color-mix(in srgb, var(--color-bg) 88%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease,
              padding-top var(--transition-interactive),
              padding-bottom var(--transition-interactive),
              background-color var(--transition-interactive);
}

[data-theme="dark"] .header {
  background-color: color-mix(in srgb, var(--color-bg) 88%, transparent);
}

.header--scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.header__inner {
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: space-between;
  justify-content: space-between;
  gap: var(--space-8);
}

/* ─── LOGO ─────────────────────────────────────────────────────────────── */
.logo {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.02em;
  -webkit-flex-shrink: 0;
  flex-shrink: 0;
  padding: var(--space-2) 0;
}

.logo:hover { color: var(--color-primary); }

/* ─── NAV ──────────────────────────────────────────────────────────────── */
.nav {
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav__link {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--transition-interactive);
  white-space: nowrap;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-primary);
  transition: width var(--transition-interactive);
}

.nav__link:hover { color: var(--color-text); }
.nav__link:hover::after { width: 100%; }

/* Active state (set by JS) */
.nav__link--active { color: var(--color-text); }
.nav__link--active::after { width: 100%; }

.header__actions {
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-3);
}

/* ─── THEME TOGGLE ─────────────────────────────────────────────────────── */
.theme-toggle {
  width: 40px;
  height: 40px;
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  -webkit-tap-highlight-color: transparent;
  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-toggle {
  display: none;
  width: 44px;
  height: 44px;
  -webkit-flex-direction: column;
  flex-direction: column;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-align-items: center;
  align-items: center;
  gap: 5px;
  border-radius: var(--radius-md);
  color: var(--color-text);
  -webkit-tap-highlight-color: transparent;
  transition: background var(--transition-interactive);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.3s ease;
  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
}

.nav-toggle.open span:nth-child(1) { -webkit-transform: translateY(6.5px) rotate(45deg); transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { -webkit-transform: translateY(-6.5px) rotate(-45deg); transform: translateY(-6.5px) rotate(-45deg); }

/* ─── MOBILE NAV OVERLAY ───────────────────────────────────────────────── */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  bottom: env(safe-area-inset-bottom, 0);
  z-index: 90;
  background: var(--color-bg);
  padding-top: var(--space-24);
  padding-left: var(--space-8);
  padding-right: var(--space-8);
  padding-bottom: var(--space-8);
  -webkit-flex-direction: column;
  flex-direction: column;
  -webkit-justify-content: center;
  justify-content: center;
  gap: var(--space-3);
  opacity: 0;
  pointer-events: none;
  -webkit-transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-nav.open {
  display: -webkit-flex;
  display: flex;
  opacity: 1;
  pointer-events: all;
}

.mobile-nav__link {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
  text-decoration: none;
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  min-height: 56px;
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  transition: color var(--transition-interactive),
              padding-left var(--transition-interactive);
}

.mobile-nav__link:hover,
.mobile-nav__link:active {
  color: var(--color-primary);
  padding-left: var(--space-3);
}

/* Hero */
.hero {
  height: 100vh;
  height: 100dvh;
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 0;
}

.hero__bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero__grid {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(var(--color-divider) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-divider) 1px, transparent 1px);
  background-size: 60px 60px;
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 80%);
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 80%);
  opacity: 0.5;
}

.hero__blob {
  position: absolute;
  width: clamp(300px, 50vw, 600px);
  height: clamp(300px, 50vw, 600px);
  border-radius: 50%;
  -webkit-filter: blur(80px);
  filter: blur(80px);
  opacity: 0.12;
  background: radial-gradient(circle, var(--color-primary), transparent 70%);
  bottom: -10%;
  right: -10%;
  will-change: transform;
  -webkit-animation: float 8s ease-in-out infinite;
  animation: float 8s ease-in-out infinite;
}

.hero__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: column;
  flex-direction: column;
  -webkit-justify-content: space-between;
  justify-content: space-between;
  padding-top: clamp(var(--space-20), 12vh, var(--space-24));
  padding-bottom: clamp(var(--space-8), 6vh, var(--space-12));
}

/* Hero top-left content */
.hero__top-left {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: column;
  flex-direction: column;
  -webkit-align-items: flex-start;
  align-items: flex-start;
}

.hero__label {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  opacity: 0;
  -webkit-animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
  animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.hero__label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-primary);
  -webkit-flex-shrink: 0;
  flex-shrink: 0;
}

section .container {
  max-width: 1400px;
  padding-left: clamp(var(--space-6), 6vw, var(--space-16));
  padding-right: clamp(var(--space-6), 6vw, var(--space-16));
}

.hero__name {
  font-family: var(--font-display);
  font-size: clamp(4rem, 10vw, 10rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.9;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  margin-top: var(--space-6);
  opacity: 0;
  overflow-wrap: break-word;
  word-break: break-word;
  animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.35s both;
  text-align: left;
}

.hero__name em {
  font-style: normal;
  color: var(--color-primary);
}

.hero__role {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, var(--text-2xl));
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  opacity: 0;
  min-height: 1.2em;
  -webkit-animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both;
  animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both;
}

.hero__desc {
  max-width: 65ch;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  opacity: 0;
  -webkit-animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.55s both;
  animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.55s both;
  text-align: left;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: var(--space-4);
  opacity: 0;
  -webkit-animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.65s both;
  animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.65s both;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  right: var(--space-5);
  left: auto;
  transform: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeIn 0.8s ease 1.2s both;
}

.hero__scroll-arrow {
  position: relative;
  width: 2px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-primary), transparent);
  animation: scrollLine 1.5s ease-in-out 1.5s infinite;
}

.hero__scroll-arrow::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 8px solid var(--color-primary);
}

@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ─── BUTTONS ──────────────────────────────────────────────────────────── */
.btn {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.01em;
  cursor: pointer;
  min-height: 44px;
  -webkit-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              -webkit-transform var(--transition-interactive),
              transform var(--transition-interactive),
              border-color var(--transition-interactive);
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border: 1.5px solid var(--color-primary);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  -webkit-transform: translateY(-1px);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--color-primary) 30%, transparent);
}

.btn--primary:active {
  -webkit-transform: translateY(0);
  transform: translateY(0);
  box-shadow: none;
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-text-muted);
  background: var(--color-surface-2);
  -webkit-transform: translateY(-1px);
  transform: translateY(-1px);
}

.btn--outline:active {
  -webkit-transform: translateY(0);
  transform: translateY(0);
}

/* ─── SECTIONS ─────────────────────────────────────────────────────────── */
.section {
  padding-top: clamp(var(--space-16), 8vw, var(--space-32));
  padding-bottom: clamp(var(--space-16), 8vw, var(--space-32));
}

.section--alt { background: var(--color-surface); }

.section__header {
  margin-bottom: clamp(var(--space-12), 4vw, var(--space-20));
}

.section__label {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section__label::before {
  content: '';
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-primary);
  -webkit-flex-shrink: 0;
  flex-shrink: 0;
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
  line-height: 1.1;
  margin-bottom: var(--space-4);
  overflow-wrap: break-word;
}

.section__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 55ch;
  line-height: 1.7;
}

/* ─── ABOUT ────────────────────────────────────────────────────────────── */
.about__grid {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: clamp(var(--space-12), 5vw, var(--space-20));
  -webkit-align-items: center;
  align-items: center;
}

/* Two-column on large screens */
@supports (display: grid) {
  .about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
}

.about__text p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-5);
  max-width: none;
}

.about__text p:last-child { margin-bottom: 0; }
.about__text strong { color: var(--color-text); font-weight: 600; }

.about__highlights {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: column;
  flex-direction: column;
  gap: var(--space-5);
}

.highlight-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              -webkit-transform var(--transition-interactive),
              transform var(--transition-interactive);
}

@media (hover: hover) {
  .highlight-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    -webkit-transform: translateY(-2px);
    transform: translateY(-2px);
  }
}

.highlight-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  font-size: 18px;
  font-family: "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
}

.highlight-card__title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.highlight-card__desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: none;
}

/* ─── SKILLS ───────────────────────────────────────────────────────────── */
.skills__grid {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: var(--space-6);
}

@supports (display: grid) {
  .skills__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }
}

.skill-category {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  -webkit-flex: 1 1 280px;
  flex: 1 1 280px;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

@media (hover: hover) {
  .skill-category:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
  }
}

.skill-category__head {
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.skill-category__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  font-size: 16px;
  -webkit-flex-shrink: 0;
  flex-shrink: 0;
}

.skill-category__name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.skill-tags {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.skill-tag {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              border-color var(--transition-interactive);
}

@media (hover: hover) {
  .skill-tag:hover {
    background: var(--color-primary-subtle);
    color: var(--color-primary);
    border-color: var(--color-primary);
  }
}

.skills__nav {
  display: none;
}

/* ─── EXPERIENCE TIMELINE ──────────────────────────────────────────────── */
.timeline {
  position: relative;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: column;
  flex-direction: column;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: -webkit-linear-gradient(top, var(--color-primary), var(--color-border) 60%, transparent);
  background: linear-gradient(to bottom, var(--color-primary), var(--color-border) 60%, transparent);
}

.timeline__item {
  display: -webkit-flex;
  display: flex;
  gap: var(--space-6);
  padding-bottom: var(--space-10);
  position: relative;
}

@supports (display: grid) {
  .timeline__item {
    display: grid;
    grid-template-columns: auto 1fr;
  }
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__dot {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-primary);
  -webkit-flex-shrink: 0;
  flex-shrink: 0;
  margin-top: var(--space-1);
  position: relative;
  z-index: 1;
  transition: background var(--transition-interactive);
}

@media (hover: hover) {
  .timeline__item:hover .timeline__dot {
    background: var(--color-primary);
  }
}

.timeline__content { padding-bottom: var(--space-6); }

.timeline__header {
  display: -webkit-flex;
  display: flex;
  -webkit-justify-content: space-between;
  justify-content: space-between;
  -webkit-align-items: flex-start;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-2);
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
}

.timeline__role {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.timeline__period {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
  white-space: nowrap;
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-2);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
}

.timeline__company {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
  text-decoration: none;
}

.timeline__company:hover { opacity: 0.8; }

.timeline__location {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.timeline__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
  max-width: 65ch;
}

.timeline__skills {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ─── EDUCATION ────────────────────────────────────────────────────────── */
.education__grid {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: var(--space-6);
}

@supports (display: grid) {
  .education__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  }
}

.edu-card {
  -webkit-flex: 1 1 300px;
  flex: 1 1 300px;
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              -webkit-transform var(--transition-interactive),
              transform var(--transition-interactive);
}

.edu-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), color-mix(in srgb, var(--color-primary) 40%, transparent));
  -webkit-transform: scaleX(0);
  transform: scaleX(0);
  -webkit-transform-origin: left;
  transform-origin: left;
  transition: -webkit-transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@media (hover: hover) {
  .edu-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    -webkit-transform: translateY(-3px);
    transform: translateY(-3px);
  }
  .edu-card:hover::before { -webkit-transform: scaleX(1); transform: scaleX(1); }
}

.edu-card__period {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.edu-card__school {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: var(--space-2);
  overflow-wrap: break-word;
}

.edu-card__degree {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

/* ─── CERTIFICATIONS ───────────────────────────────────────────────────── */
.certs__grid {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: var(--space-5);
}

@supports (display: grid) {
  .certs__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr));
  }
}

.cert-card {
  display: -webkit-flex;
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  -webkit-flex: 1 1 260px;
  flex: 1 1 260px;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              -webkit-transform var(--transition-interactive),
              transform var(--transition-interactive);
}

@media (hover: hover) {
  .cert-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    -webkit-transform: translateY(-2px);
    transform: translateY(-2px);
  }
}

.cert-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  font-size: 20px;
  -webkit-flex-shrink: 0;
  flex-shrink: 0;
  font-family: "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
}

.cert-card__info { -webkit-flex: 1; flex: 1; min-width: 0; }

.cert-card__title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-1);
  line-height: 1.35;
  overflow-wrap: break-word;
  word-break: normal;
}

.cert-card__issuer {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.cert-card__date {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ─── CONTACT ──────────────────────────────────────────────────────────── */
.contact__wrapper {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.contact__tagline {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-10);
  max-width: none;
}

.contact__links {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: var(--space-4);
  -webkit-justify-content: center;
  justify-content: center;
  margin-bottom: var(--space-12);
}

.contact__link {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 500;
  min-height: 52px;
  -webkit-tap-highlight-color: transparent;
  transition: border-color var(--transition-interactive),
              background var(--transition-interactive),
              color var(--transition-interactive),
              -webkit-transform var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

@media (hover: hover) {
  .contact__link:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    color: var(--color-primary);
    -webkit-transform: translateY(-2px);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
  }
}

.contact__link:active {
  -webkit-transform: translateY(0);
  transform: translateY(0);
}

.contact__link svg { -webkit-flex-shrink: 0; flex-shrink: 0; }

/* ─── FOOTER ───────────────────────────────────────────────────────────── */
.footer {
  padding-top: var(--space-12);
  padding-bottom: calc(var(--space-12) + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: -webkit-flex;
  display: flex;
  -webkit-justify-content: space-between;
  justify-content: space-between;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-6);
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
}

.footer__brand {
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-4);
}

.footer__logo {
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-md);
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-sm);
}

.footer__brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer__links {
  display: -webkit-flex;
  display: flex;
  gap: var(--space-6);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer__links a:hover {
  color: var(--color-primary);
}

/* ─── DIVIDER ──────────────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--color-divider);
  border: none;
  margin: 0;
}

/* ─── SCROLL ANIMATIONS ────────────────────────────────────────────────── */
@-webkit-keyframes fadeUp {
  from { opacity: 0; -webkit-transform: translateY(20px); transform: translateY(20px); }
  to   { opacity: 1; -webkit-transform: translateY(0);    transform: translateY(0); }
}
@keyframes fadeUp {
  from { opacity: 0; -webkit-transform: translateY(20px); transform: translateY(20px); }
  to   { opacity: 1; -webkit-transform: translateY(0);    transform: translateY(0); }
}

@-webkit-keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.fade-in  { opacity: 1; }
.reveal-up { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    -webkit-animation: fadeIn linear both;
    animation: fadeIn linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 60%;
  }

  .reveal-up {
    opacity: 0;
    -webkit-animation: fadeUp linear both;
    animation: fadeUp linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 60%;
  }
}

/* Stagger delays */
.stagger > *:nth-child(1) { -webkit-animation-delay: 0s;    animation-delay: 0s; }
.stagger > *:nth-child(2) { -webkit-animation-delay: 0.05s; animation-delay: 0.05s; }
.stagger > *:nth-child(3) { -webkit-animation-delay: 0.1s;  animation-delay: 0.1s; }
.stagger > *:nth-child(4) { -webkit-animation-delay: 0.15s; animation-delay: 0.15s; }
.stagger > *:nth-child(5) { -webkit-animation-delay: 0.2s;  animation-delay: 0.2s; }
.stagger > *:nth-child(6) { -webkit-animation-delay: 0.25s; animation-delay: 0.25s; }

/* ─── STATUS BADGE ─────────────────────────────────────────────────────── */
.status-badge {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: color-mix(in srgb, #22c55e 10%, transparent);
  border: 1px solid color-mix(in srgb, #22c55e 30%, transparent);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: #16a34a;
  margin-bottom: var(--space-5);
  opacity: 0;
  -webkit-animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
  animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
}

[data-theme="dark"] .status-badge {
  color: #4ade80;
  background: rgba(74, 222, 128, 0.10);
  border-color: rgba(74, 222, 128, 0.25);
  background: color-mix(in srgb, #4ade80 10%, transparent);
  border-color: color-mix(in srgb, #4ade80 25%, transparent);
}

.status-badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  -webkit-animation: pulse 2s ease-in-out infinite;
  animation: pulse 2s ease-in-out infinite;
  -webkit-flex-shrink: 0;
  flex-shrink: 0;
}

[data-theme="dark"] .status-badge__dot { background: #4ade80; }

@-webkit-keyframes pulse {
  0%, 100% { opacity: 1; -webkit-transform: scale(1);   transform: scale(1); }
  50%       { opacity: 0.6; -webkit-transform: scale(1.3); transform: scale(1.3); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(1.3); }
}

/* Responsive */

@media (max-width: 1024px) {
  .about__grid {
    grid-template-columns: 1fr !important;
  }
}

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

  .about__highlights {
    -webkit-flex-direction: row;
    flex-direction: row;
    -webkit-flex-wrap: wrap;
    flex-wrap: wrap;
  }

  .highlight-card {
    -webkit-flex: 1 1 200px;
    flex: 1 1 200px;
  }

  .timeline::before { display: none; }

  .timeline__item {
    display: block !important;
    padding-bottom: var(--space-8);
  }

  .timeline__dot { display: none; }

  .timeline__header {
    -webkit-flex-direction: column;
    flex-direction: column;
    gap: var(--space-2);
  }

  .hero__scroll { display: none; }

  .skills__wrapper {
    position: relative;
  }

  .skills__nav {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-6);
    margin-top: var(--space-4);
  }

  .skills__grid {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-bottom: var(--space-4);
    gap: var(--space-4);
  }

  .skills__grid::-webkit-scrollbar {
    display: none;
  }

  .skill-category {
    flex: 0 0 85%;
    scroll-snap-align: center;
    min-width: 280px;
  }

  .skills__nav {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-6);
    margin-top: var(--space-4);
  }

  .skills__arrow {
    display: flex;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 20px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-interactive);
    -webkit-tap-highlight-color: transparent;
  }

  .skills__arrow:hover,
  .skills__arrow:active {
    border-color: var(--color-primary);
    color: var(--color-primary);
  }

  .skills__dots {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
  }

  .skills__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-border);
    transition: background var(--transition-interactive);
  }

  .skills__dot.active {
    background: var(--color-primary);
  }

  .hero__bottom-right {
    -webkit-align-items: flex-start;
    align-items: flex-start;
    text-align: left;
  }
  .hero__cta {
    -webkit-justify-content: flex-start;
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  :root {
    --text-hero: clamp(2.5rem, 0.5rem + 9vw, 5rem);
  }

  .hero__cta {
    -webkit-flex-direction: column;
    flex-direction: column;
  }

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

  .contact__links {
    -webkit-flex-direction: column;
    flex-direction: column;
    -webkit-align-items: center;
    align-items: center;
  }

  .contact__link {
    width: 100%;
    max-width: 320px;
    -webkit-justify-content: center;
    justify-content: center;
  }

  .footer__inner {
    -webkit-flex-direction: column;
    flex-direction: column;
    text-align: center;
  }

  .certs__grid { display: block !important; }
  .cert-card   { margin-bottom: var(--space-4); -webkit-flex: none; flex: none; }
  .cert-card:last-child { margin-bottom: 0; }
}

@media (min-width: 1400px) {
  .container {
    max-width: 1100px;
  }
}

@supports (padding: env(safe-area-inset-left)) {
  .container {
    padding-left: max(clamp(var(--space-5), 5vw, var(--space-16)), env(safe-area-inset-left));
    padding-right: max(clamp(var(--space-5), 5vw, var(--space-16)), env(safe-area-inset-right));
  }

  .header {
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
  }
}