/* ============================================
   Apple-inspired design system
   ============================================ */
:root {
  --color-accent: #0A66C2;
  --color-accent-hover: #004182;
  --color-accent-soft: color-mix(in srgb, var(--color-accent) 12%, transparent);
  --color-link: #2997ff;

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", ui-monospace, Menlo, Monaco, monospace;

  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-xl: 40px;
  --radius-full: 980px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration: 0.55s;

  --container: 1080px;
  --header-h: 52px;
}

[data-theme="light"] {
  --bg: #fbfbfd;
  --bg-panel: #ffffff;
  --bg-elevated: rgba(255, 255, 255, 0.72);
  --bg-muted: #f5f5f7;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #86868b;
  --border: rgba(0, 0, 0, 0.08);
  --header-bg: rgba(251, 251, 253, 0.72);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.1);
  --orb-1: rgba(10, 102, 194, 0.18);
  --orb-2: rgba(120, 120, 128, 0.12);
  --orb-3: rgba(41, 151, 255, 0.14);
  --cta-bg: linear-gradient(180deg, #f5f5f7 0%, #e8e8ed 100%);
}

[data-theme="dark"] {
  --bg: #000000;
  --bg-panel: #161617;
  --bg-elevated: rgba(29, 29, 31, 0.72);
  --bg-muted: #1d1d1f;
  --text: #f5f5f7;
  --text-secondary: #a1a1a6;
  --text-tertiary: #6e6e73;
  --border: rgba(255, 255, 255, 0.1);
  --header-bg: rgba(0, 0, 0, 0.72);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 80px rgba(0, 0, 0, 0.55);
  --orb-1: rgba(10, 102, 194, 0.22);
  --orb-2: rgba(255, 255, 255, 0.04);
  --orb-3: rgba(41, 151, 255, 0.12);
  --cta-bg: linear-gradient(180deg, #1d1d1f 0%, #000000 100%);
  --color-link: #2997ff;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.47059;
  font-weight: 400;
  letter-spacing: -0.022em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background 0.4s var(--ease-out), color 0.4s var(--ease-out);
  --bs-body-font-family: var(--font-sans);
  --bs-body-bg: var(--bg);
  --bs-body-color: var(--text);
  --bs-border-color: var(--border);
  --bs-link-color: var(--color-link);
  --bs-link-hover-color: var(--color-accent-hover);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  width: min(100% - 3rem, var(--container));
  margin-inline: auto;
}

.container--wide {
  width: min(100% - 2rem, 1200px);
}

/* ── Ambient background ── */
.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.9;
  animation: float 18s ease-in-out infinite;
}

.ambient__orb--1 {
  width: 55vw;
  height: 55vw;
  max-width: 600px;
  max-height: 600px;
  background: var(--orb-1);
  top: -10%;
  right: -15%;
}

.ambient__orb--2 {
  width: 40vw;
  height: 40vw;
  max-width: 450px;
  max-height: 450px;
  background: var(--orb-2);
  bottom: 20%;
  left: -10%;
  animation-delay: -6s;
}

.ambient__orb--3 {
  width: 30vw;
  height: 30vw;
  max-width: 350px;
  max-height: 350px;
  background: var(--orb-3);
  top: 45%;
  left: 40%;
  animation-delay: -12s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(2%, -3%) scale(1.04); }
  66% { transform: translate(-2%, 2%) scale(0.96); }
}

/* ── Scroll progress ── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 200;
  background: transparent;
}

.scroll-progress__bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-link));
  transition: width 0.1s linear;
}

/* ── Skip link ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
}

.skip-link:focus { top: 1rem; }

/* ── Bootstrap overrides ── */
.form-control {
  background-color: var(--bg-panel);
  border-color: var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  background-color: var(--bg-panel);
  border-color: var(--color-link);
  color: var(--text);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-link) 15%, transparent);
}

.form-control::placeholder { color: var(--text-tertiary); }

.form-label {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
}

.navbar-toggler {
  border-color: var(--border);
  padding: 0.35rem 0.55rem;
}

.navbar-toggler:focus { box-shadow: 0 0 0 3px var(--color-accent-soft); }

[data-theme="light"] .navbar-toggler-icon {
  --bs-navbar-toggler-icon-bg: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2833, 37, 41, 0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

[data-theme="dark"] .navbar-toggler-icon {
  --bs-navbar-toggler-icon-bg: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ── Header (Bootstrap navbar) ── */
.site-header {
  z-index: 100;
  min-height: var(--header-h);
  padding: 0;
  background: var(--header-bg) !important;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease-out);
}

.site-header--scrolled { border-color: var(--border); }

.nav-shell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
  padding-block: 0.5rem;
}

.nav__logo {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text) !important;
  margin-right: auto;
  transition: opacity 0.2s;
}

.nav__logo:hover { opacity: 0.7; }

.nav__link {
  font-size: 0.8125rem !important;
  font-weight: 400;
  color: var(--text-secondary) !important;
  border-radius: var(--radius-full);
  padding: 0.4rem 0.75rem !important;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}

.nav__link:hover,
.nav__link:focus { color: var(--text) !important; }

.nav__link.active {
  color: var(--text) !important;
  background: var(--bg-muted);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

.nav__actions--mobile { display: flex; }

.theme-toggle--desktop { display: none; }

@media (min-width: 992px) {
  .nav__actions--mobile .theme-toggle { display: none; }
  .theme-toggle--desktop { display: grid; margin-left: 0.5rem; }
  .navbar-collapse { display: flex !important; align-items: center; }
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: var(--bg-muted);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: transform 0.2s var(--ease-spring), background 0.2s;
}

.theme-toggle:hover { transform: scale(1.08); }

.theme-toggle__icon {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text);
  box-shadow: -4px -2px 0 0 var(--bg);
}

[data-theme="dark"] .theme-toggle__icon {
  background: transparent;
  box-shadow: inset -3px -3px 0 0 var(--text);
}

/* ── Sections ── */
main { position: relative; z-index: 1; }

.section {
  padding: clamp(5rem, 12vw, 8rem) 0;
  position: relative;
}

.section--panel {
  background: var(--bg-panel);
  border-block: 1px solid var(--border);
}

.section--cta {
  background: var(--cta-bg);
}

.section__header {
  text-align: center;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
  max-width: 680px;
  margin-inline: auto;
}

.section__eyebrow {
  display: block;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-link);
  letter-spacing: 0;
  margin-bottom: 0.5rem;
}

.section__title {
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.section__subtitle {
  margin-top: 1rem;
  font-size: clamp(1.0625rem, 2.5vw, 1.3125rem);
  color: var(--text-secondary);
  line-height: 1.4;
  font-weight: 400;
}

/* ── Hero ── */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--header-h);
  text-align: center;
  overflow: hidden;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  padding-block: 2rem;
  width: 100%;
  text-align: center;
}

.hero__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 800px;
  margin-inline: auto;
}

.hero__visual {
  order: -1;
  perspective: 1000px;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-inline: auto;
}

.hero__avatar-wrap {
  position: relative;
  will-change: transform;
}

.hero__avatar {
  width: clamp(140px, 22vw, 200px);
  height: clamp(140px, 22vw, 200px);
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-muted);
  box-shadow: var(--shadow-lg);
  border: 3px solid var(--border);
  transition: transform 0.6s var(--ease-out), box-shadow 0.6s var(--ease-out);
}

.hero__avatar:hover {
  transform: scale(1.04);
  box-shadow: 0 30px 80px color-mix(in srgb, var(--color-accent) 25%, transparent);
}

.hero__avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.hero__avatar-ring {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 1px solid var(--border);
  animation: pulse-ring 3s ease-in-out infinite;
}

@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.06); opacity: 0.2; }
}

.hero__badge {
  margin-top: 1rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.375rem 1rem;
  background: var(--bg-elevated);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
}

.hero__greeting {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: -0.02em;
}

.hero__headline {
  font-size: clamp(3rem, 10vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1;
  margin-top: 0.25rem;
  background: linear-gradient(180deg, var(--text) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__sub {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--text-secondary);
  max-width: 42ch;
  line-height: 1.45;
  font-weight: 400;
  margin-top: 0.75rem;
  margin-inline: auto;
  text-align: center;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.hero__stats {
  display: flex;
  gap: clamp(1.5rem, 5vw, 3.5rem);
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
  width: 100%;
  max-width: 600px;
}

.hero__stat { text-align: center; }

.hero__stat-value {
  display: block;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.hero__stat-label {
  display: block;
  margin-top: 0.375rem;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero__scroll-hint {
  margin-top: 3rem;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  animation: bounce 2s ease-in-out infinite;
}

.hero__scroll-hint svg {
  opacity: 0.5;
}

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

/* ── Portfolio buttons ── */
.p-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.375rem;
  font-size: 1.0625rem;
  font-weight: 400;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition: transform 0.25s var(--ease-spring), background 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.p-btn:hover { transform: scale(1.04); color: inherit; }
.p-btn:active { transform: scale(0.98); }

.p-btn--primary {
  background: var(--color-link);
  color: #fff !important;
}

.p-btn--primary:hover {
  background: color-mix(in srgb, var(--color-link) 85%, #fff);
  box-shadow: 0 8px 24px color-mix(in srgb, var(--color-link) 35%, transparent);
  color: #fff !important;
}

.p-btn--secondary {
  background: transparent;
  color: var(--color-link) !important;
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.p-btn--secondary:hover {
  background: var(--bg-muted);
  border-color: color-mix(in srgb, var(--color-link) 40%, var(--border));
  color: var(--color-link) !important;
}

/* ── Portfolio cards ── */
.p-card {
  background: var(--bg-elevated);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  transition: transform 0.45s var(--ease-out), box-shadow 0.45s var(--ease-out), border-color 0.45s;
}

.p-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--color-link) 20%, var(--border));
}

.p-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

/* ── About ── */
.about__prose {
  max-width: 680px;
  margin-inline: auto;
  text-align: center;
}

.about__lead {
  font-size: clamp(1.25rem, 3vw, 1.625rem);
  font-weight: 500;
  color: var(--text);
  line-height: 1.45;
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
}

.about__body {
  font-size: clamp(1.0625rem, 2vw, 1.125rem);
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.about__body:last-child { margin-bottom: 0; }

/* ── Skills ── */
.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.skill-list__item {
  font-size: 0.8125rem;
  padding: 0.4rem 0.875rem;
  background: var(--bg-muted);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  transition: background 0.2s, color 0.2s;
}

.p-card--skill:hover .skill-list__item {
  background: color-mix(in srgb, var(--color-link) 8%, var(--bg-muted));
}

/* ── Projects Swiper carousel ── */
.project-swiper-wrap {
  position: relative;
}

.project-swiper {
  --swiper-navigation-color: var(--text);
  --swiper-pagination-color: var(--color-link);
  --swiper-theme-color: var(--color-link);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  background: var(--bg-panel);
  overflow: hidden;
}

.project-slide__media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-muted);
}

.project-slide__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 8s var(--ease-out);
}

.swiper-slide-active .project-slide__image {
  transform: scale(1.04);
}

.project-slide__copy {
  padding: clamp(2rem, 5vw, 3rem) clamp(1.5rem, 4vw, 3rem) clamp(2.5rem, 5vw, 3.5rem);
  max-width: 680px;
  margin-inline: auto;
}

.project-slide__tagline {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-link);
  margin-bottom: 0.375rem;
}

.project-slide__title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 0.75rem;
}

.project-slide__desc {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--text-secondary);
  line-height: 1.55;
  max-width: 52ch;
  margin-bottom: 1.25rem;
}

.project-slide__links { margin-top: 0.5rem; }

.project-swiper__counter {
  display: block;
  text-align: center;
  margin-top: 1rem;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
}

.project-swiper .swiper-button-prev,
.project-swiper .swiper-button-next {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  backdrop-filter: blur(12px);
  color: var(--text);
  transition: transform 0.25s var(--ease-spring), background 0.2s;
}

.project-swiper .swiper-button-prev::after,
.project-swiper .swiper-button-next::after {
  font-size: 1rem;
  font-weight: 700;
}

.project-swiper .swiper-button-prev:hover,
.project-swiper .swiper-button-next:hover {
  transform: scale(1.08);
  background: var(--bg-muted);
}

.project-swiper .swiper-pagination-bullet {
  background: var(--text-tertiary);
  opacity: 0.45;
  transition: transform 0.25s var(--ease-spring), opacity 0.25s, background 0.25s;
}

.project-swiper .swiper-pagination-bullet-active {
  background: var(--color-link);
  opacity: 1;
  transform: scale(1.2);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-bottom: 1.25rem;
}

.tag {
  font-size: 0.6875rem;
  font-weight: 500;
  padding: 0.3rem 0.625rem;
  background: var(--bg-muted);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

/* ── Experience timeline ── */
.timeline {
  position: relative;
  max-width: 760px;
  margin-inline: auto;
  padding-left: 2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--color-link), var(--border));
  border-radius: 2px;
}

.timeline__item {
  position: relative;
  padding-bottom: 2.5rem;
}

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

.timeline__marker {
  position: absolute;
  left: -2rem;
  top: 0.35rem;
  width: 16px;
  height: 16px;
  margin-left: 0;
  transform: translateX(-1px);
  border-radius: 50%;
  background: var(--color-link);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-link) 25%, transparent);
  z-index: 1;
}

.timeline__body {
  background: var(--bg-elevated);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.timeline__header {
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--color-link) 4%, var(--bg-panel));
}

.timeline__period {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-link);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.5rem;
}

.timeline__role {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 0.375rem;
}

.timeline__company {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.timeline__context {
  padding: clamp(1.25rem, 3vw, 1.75rem);
}

.timeline__context p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ── Achievements ── */
.achievement-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}

.achievement-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.achievement-card__media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-muted);
}

.achievement-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}

.achievement-card:hover .achievement-card__media img {
  transform: scale(1.05);
}

.achievement-card__body {
  padding: 1.25rem;
}

.achievement-card__year {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-link);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.375rem;
}

.achievement-card__title {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.375rem;
}

.achievement-card__desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ── Contact ── */
.contact__inner {
  max-width: 520px;
  margin-inline: auto;
  text-align: center;
}

.contact__socials {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: var(--bg-elevated);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  transition: transform 0.25s var(--ease-spring), border-color 0.25s;
}

.social-link:hover {
  transform: scale(1.05);
  border-color: color-mix(in srgb, var(--color-link) 30%, var(--border));
}

.social-link__icon {
  font-size: 0.875rem;
  font-weight: 600;
}

.contact__form { text-align: left; }

.form-success {
  font-size: 0.9375rem;
  color: #34c759;
  text-align: center;
  padding: 0.75rem;
  background: color-mix(in srgb, #34c759 10%, transparent);
  border-radius: var(--radius-sm);
}

/* ── Footer ── */
.site-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.site-footer__note { font-size: 0.75rem; }

/* ── Back to top ── */
.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.125rem;
  background: var(--bg-elevated);
  backdrop-filter: saturate(180%) blur(20px);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(16px) scale(0.9);
  pointer-events: none;
  transition: opacity 0.35s var(--ease-out), transform 0.35s var(--ease-out), background 0.2s;
}

.back-to-top--visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--bg-muted);
  transform: translateY(-2px) scale(1.02);
}

/* ── Reveal animations ── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity var(--duration) var(--ease-out), transform var(--duration) var(--ease-out);
  transition-delay: var(--delay, 0ms);
}

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

.reveal-scale {
  opacity: 0;
  transform: scale(0.94);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  transition-delay: var(--delay, 0ms);
}

.reveal-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

.hero__content > * {
  opacity: 0;
  transform: translateY(24px);
  animation: hero-in 0.9s var(--ease-out) forwards;
}

.hero__visual {
  opacity: 0;
  transform: scale(0.9);
  animation: hero-visual-in 1s var(--ease-out) 0.1s forwards;
}

.hero__content > *:nth-child(1) { animation-delay: 0.05s; }
.hero__content > *:nth-child(2) { animation-delay: 0.15s; }
.hero__content > *:nth-child(3) { animation-delay: 0.25s; }
.hero__content > *:nth-child(4) { animation-delay: 0.35s; }
.hero__content > *:nth-child(5) { animation-delay: 0.45s; }
.hero__content > *:nth-child(6) { animation-delay: 0.55s; }

@keyframes hero-in {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes hero-visual-in {
  to { opacity: 1; transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal, .reveal-scale { opacity: 1; transform: none; }
}

/* ── Responsive ── */
@media (max-width: 991px) {
  .navbar-collapse {
    flex-basis: 100%;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
  }

  .navbar-nav {
    align-items: center;
    margin-bottom: 0.75rem !important;
  }

  .nav__link {
    font-size: 1.0625rem !important;
    padding: 0.6rem 1rem !important;
  }

  .theme-toggle--desktop { display: none !important; }
}

@media (max-width: 900px) {
  .timeline { padding-left: 1.75rem; }
  .timeline__marker { left: -1.75rem; }

  .project-swiper .swiper-button-prev { left: 8px; }
  .project-swiper .swiper-button-next { right: 8px; }
}

@media (max-width: 768px) {
  .back-to-top span { display: none; }

  .back-to-top {
    width: 44px;
    height: 44px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
  }
}