@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  --text-primary: #1a1a1a;
  --text-body: #333333;
  --text-muted: #666666;
  --text-light: #999999;
  --accent: #0a7c6e;
  --accent-hover: #085f54;
  --bg: #ffffff;
  --border: #e8e8e8;
  --card-bg: #fafafa;
  --nav-bg: rgba(255, 255, 255, 0.96);
  --card-border: #E2EEF3;
  --card-border-hover: #b8d4e0;
  --card-expand-bg: #F0F0F0;
  --card-expand-color: #3D3D3D;
  --badge-bg: #F0F0F0;
  --badge-color: #7A7A7A;
  --available-bg: #f5f5f5;
  --available-border: #e4e4e4;
}

/* ── Dark mode ──────────────────────────────────────────── */

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --text-primary: #efefef;
    --text-body: #b0b0b0;
    --text-muted: #707070;
    --text-light: #505050;
    --accent: #0fb89f;
    --accent-hover: #13d4b8;
    --bg: #111111;
    --border: #272727;
    --card-bg: #191919;
    --nav-bg: rgba(17, 17, 17, 0.96);
    --card-border: #252525;
    --card-border-hover: #383838;
    --card-expand-bg: #222222;
    --card-expand-color: #999999;
    --badge-bg: #222222;
    --badge-color: #888888;
    --available-bg: #1c1c1c;
    --available-border: #2e2e2e;
  }
}

[data-theme="dark"] {
  --text-primary: #efefef;
  --text-body: #b0b0b0;
  --text-muted: #707070;
  --text-light: #505050;
  --accent: #0fb89f;
  --accent-hover: #13d4b8;
  --bg: #111111;
  --border: #272727;
  --card-bg: #191919;
  --nav-bg: rgba(17, 17, 17, 0.96);
  --card-border: #252525;
  --card-border-hover: #383838;
  --card-expand-bg: #222222;
  --card-expand-color: #999999;
  --badge-bg: #222222;
  --badge-color: #888888;
  --available-bg: #1c1c1c;
  --available-border: #2e2e2e;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .card:hover,
  [data-theme="dark"] .card:hover {
    box-shadow: 0 6px 32px rgba(0, 0, 0, 0.5);
  }
}

[data-theme="dark"] .card:hover {
  box-shadow: 0 6px 32px rgba(0, 0, 0, 0.5);
}

/* ── Theme toggle ───────────────────────────────────────── */

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
  line-height: 0;
}

.theme-toggle:hover {
  color: var(--text-primary);
  background: var(--available-bg);
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

/* ── Navigation ─────────────────────────────────────────── */

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 48px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  transition: color 0.2s;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: #A7A7A7;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text-primary);
}

[data-theme="dark"] .nav-links a:hover {
  color: #FFFFFF;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .nav-links a:hover {
    color: #FFFFFF;
  }
}

.nav-links .nav-email {
  color: #A7A7A7;
}

.nav-links .nav-email:hover {
  color: var(--text-primary);
}

[data-theme="dark"] .nav-links .nav-email:hover {
  color: #FFFFFF;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .nav-links .nav-email:hover {
    color: #FFFFFF;
  }
}

.nav-available {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  background: var(--available-bg);
  border: 1px solid var(--available-border);
  padding: 6px 14px;
  border-radius: 100px;
  cursor: default;
  white-space: nowrap;
}

.nav-available-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  flex-shrink: 0;
  animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
  0%   { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.55); }
  70%  { box-shadow: 0 0 0 6px rgba(34, 197, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

/* ── Page shell ─────────────────────────────────────────── */

.page-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
}

main {
  padding-top: 80px; /* nav height */
}

/* ── Home hero ──────────────────────────────────────────── */

.home-hero {
  padding: 96px 0 72px;
}

.home-hero-tagline {
  font-size: 40px;
  font-weight: 400;
  color: var(--text-primary);
  letter-spacing: -0.05em;
  line-height: 1.2;
  margin-bottom: 20px;
  max-width: 800px;
}

.home-hero-label {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  line-height: 1.2;
  margin-bottom: 24px;
}

/* ── Card grid ──────────────────────────────────────────── */

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  padding-bottom: 96px;
}

.card {
  position: relative;
  background: var(--bg);
  border: 2px solid var(--card-border);
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  color: inherit;
  height: 640px;
}

.card:hover {
  border-color: var(--card-border-hover);
  box-shadow: 0 6px 32px rgba(0, 0, 0, 0.08);
}

.card-expand {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background: var(--card-expand-bg);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--card-expand-color);
  z-index: 2;
  transition: background 0.2s, color 0.2s;
}

.card:hover .card-expand {
  background: var(--text-primary);
  color: #fff;
}

.card-body {
  padding: 24px 24px 20px;
  flex-shrink: 0;
  min-height: 160px;
}

.card-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--badge-color);
  background: var(--badge-bg);
  border-radius: 4px;
  padding: 3px 8px;
  margin-bottom: 12px;
}

.card-title {
  font-size: 22px;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.27;
  margin-bottom: 2px;
}

.card-subtitle {
  font-size: 22px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: -0.02em;
  line-height: 1.27;
  max-width: calc(100% - 56px);
}

.card-image {
  width: 100%;
  flex: 1;
  min-height: 280px;
  overflow: hidden;
  background: var(--bg);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center bottom;
  transition: transform 0.4s ease;
}

.card-image--phone {
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.card-image--phone img {
  width: 275px;
  height: auto;
  object-fit: unset;
}

.card-image--wide {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 40px;
}

.card-image--wide img {
  width: 100%;
  height: auto;
  object-fit: unset;
  border-radius: 4px;
}

.card-image--right {
  justify-content: flex-end;
  padding: 0 0 0 40px;
}

.card-image--right img {
  transform: translateY(-30px);
  transition: transform 0.4s ease;
}

.card-image--fill {
  padding: 0;
}

.card-image--fill img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  border-radius: 0;
}

.card:hover .card-image img {
  transform: scale(1.02);
}

.card:hover .card-image--right img {
  transform: translateY(-30px) scale(1.02);
}

/* ── Home footer ────────────────────────────────────────── */

.home-footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 64px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}

.home-footer-text {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.6;
}

.home-footer-links {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-shrink: 0;
}

.home-footer-links a {
  font-size: 14px;
  font-weight: 500;
  color: #A7A7A7;
  transition: color 0.2s;
}

.home-footer-links a:hover {
  color: var(--text-primary);
}

[data-theme="dark"] .home-footer-links a:hover {
  color: #FFFFFF;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .home-footer-links a:hover {
    color: #FFFFFF;
  }
}

/* ── Case study pages ───────────────────────────────────── */

.case-back {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  margin-top: 40px;
  margin-bottom: 56px;
  transition: color 0.2s;
  max-width: 960px;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
}

.case-back:hover {
  color: var(--text-primary);
}

.case-back svg {
  flex-shrink: 0;
  transition: transform 0.2s;
}

.case-back:hover svg {
  transform: translateX(-3px);
}

.case-header {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 48px;
}

.case-tag {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.case-header h1 {
  font-size: clamp(30px, 4.5vw, 48px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 12px;
}

.case-header .subtitle {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-muted);
  font-weight: 400;
  line-height: 1.4;
}

/* Metadata row */
.case-meta {
  display: flex;
  gap: 48px;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 64px;
  flex-wrap: wrap;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-light);
}

.meta-value {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

/* Hero image */
.case-hero-image {
  width: 100%;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  overflow: hidden;
  margin-bottom: 128px;
}

.case-hero-image img {
  width: 100%;
  display: block;
}

/* Case study body content */
.case-body {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 128px;
}

.case-section {
  margin-bottom: 48px;
}

.case-section h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.case-section p {
  font-size: 17px;
  color: var(--text-body);
  line-height: 1.75;
  margin-bottom: 16px;
}

.case-section p:last-child {
  margin-bottom: 0;
}

/* Full-width images in body */
.case-image-full {
  width: 100%;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  overflow: hidden;
  margin-top: 128px;
  margin-bottom: 128px;
}

.case-image-full img {
  width: 100%;
  display: block;
}

/* ── Dark mode image swapping ───────────────────────────── */
.img-dark { display: none !important; }
[data-theme="dark"] .img-dark { display: block !important; }
[data-theme="dark"] .img-light { display: none !important; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .img-dark { display: block !important; }
  :root:not([data-theme="light"]) .img-light { display: none !important; }
}

.case-image-caption {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 12px;
  font-style: italic;
}

/* Sprint timeline */
.sprint-timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  margin: 40px auto;
  max-width: 800px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.sprint-day {
  padding: 20px 16px;
  border-right: 1px solid var(--border);
  background: var(--card-bg);
}

.sprint-day:last-child {
  border-right: none;
}

.sprint-day-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.sprint-day-content {
  font-size: 13px;
  color: var(--text-body);
  line-height: 1.5;
}

/* Stat cards */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 128px auto;
  max-width: 800px;
}

.stat-card {
  padding: 28px 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
}

.stat-number {
  font-size: 40px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.stat-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Tech stack pills */
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0;
}

.tag {
  font-size: 12px;
  font-weight: 500;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
}

/* ── About page ─────────────────────────────────────────── */

.about-wrap {
  max-width: 680px;
  padding: 80px 0 120px;
  margin-left: auto;
  margin-right: auto;
}

.about-content {
  width: 100%;
}

.about-photo {
  width: 96px;
  margin-bottom: 32px;
}

.about-photo img {
  width: 96px;
  height: 96px;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
  display: block;
}

.about-wrap h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  margin-bottom: 40px;
}

.about-wrap p {
  font-size: 17px;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 24px;
}

.about-wrap p:last-of-type {
  margin-bottom: 40px;
}

.about-email {
  font-size: 16px;
  font-weight: 500;
  color: var(--accent);
  display: inline-block;
  transition: color 0.2s;
}

.about-email:hover {
  color: var(--accent-hover);
}

/* ── Responsive ─────────────────────────────────────────── */

@media (max-width: 900px) {
  nav {
    padding: 18px 24px;
  }

  .page-wrap {
    padding: 0 24px;
  }

  .grid {
    gap: 16px;
    padding-bottom: 64px;
  }

  .case-meta {
    gap: 28px;
  }

  .stat-cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .sprint-timeline {
    grid-template-columns: 1fr;
  }

  .sprint-day {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .sprint-day:last-child {
    border-bottom: none;
  }
}

@media (max-width: 640px) {
  nav {
    padding: 16px 20px;
  }

  .nav-links {
    gap: 20px;
  }

  .nav-links .nav-cv {
    display: none;
  }

  .page-wrap {
    padding: 0 20px;
  }

  .home-hero {
    padding: 72px 0 48px;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 12px;
    padding-bottom: 48px;
  }

  .home-footer {
    flex-direction: column;
    gap: 24px;
    padding: 36px 0 48px;
  }

  .case-meta {
    gap: 24px;
    flex-direction: column;
  }

  .stat-cards {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .case-body {
    margin-bottom: 48px;
  }

  .about-wrap {
    padding: 56px 0 80px;
  }
}