/* ==========================================================================
   H. Cem Öztürk — Products & Apps Timeline Stylesheet
   Color-derived themes per product | Interactive Layered Showcase Decks | Apple Craft
   ========================================================================== */

:root {
  --bg-page: #fbfbfd;
  --text-primary: #1d1d1f;
  --text-secondary: #56595e;
  --text-muted: #86868b;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-card: rgba(0, 0, 0, 0.07);
  --footer-surface: #f2efea;
  --footer-floor-line: rgba(92, 72, 50, 0.18);

  /* Metro identities stay constant across light and dark themes. */
  --line-independent: #2563eb;
  --line-zeplin: #e88b18;
  --line-akbank: #dc0005;
  --line-start: #198754;

  --font-sans: "SF Pro Text", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Avenir Next", "Segoe UI", sans-serif;
  --font-mono: "SF Mono", Menlo, Monaco, "Courier New", monospace;
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-apple: cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --bg-page: #0a0a0c;
  --text-primary: #f5f5f7;
  --text-secondary: #a1a1a6;
  --text-muted: #6e6e73;
  --border-subtle: rgba(255, 255, 255, 0.1);
  --border-card: rgba(255, 255, 255, 0.09);
  --footer-surface: #171411;
  --footer-floor-line: rgba(255, 235, 210, 0.15);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-page: #0a0a0c;
    --text-primary: #f5f5f7;
    --text-secondary: #a1a1a6;
    --text-muted: #6e6e73;
    --border-subtle: rgba(255, 255, 255, 0.1);
    --border-card: rgba(255, 255, 255, 0.09);
    --footer-surface: #171411;
    --footer-floor-line: rgba(255, 235, 210, 0.15);
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.55;
  min-height: 100vh;
  transition: background-color 0.25s ease, color 0.25s ease;
}

/* --- HEADER --- */
.timeline-header {
  min-height: clamp(500px, 82vh, 820px);
  min-height: clamp(500px, 82svh, 820px);
  padding: 2.5rem 1.5rem 2rem;
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-page);
}

.header-inner {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex: 1;
  flex-direction: column;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
}

.sep-dot {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.theme-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}

.theme-btn:hover {
  color: var(--text-primary);
}

.theme-text-dark { display: none; }
.theme-text-light { display: inline; }

[data-theme="dark"] .theme-text-dark { display: inline; }
[data-theme="dark"] .theme-text-light { display: none; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-text-dark { display: inline; }
  :root:not([data-theme="light"]) .theme-text-light { display: none; }
}

.hero-block {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  gap: 0.6rem;
  padding: clamp(3rem, 8vh, 6rem) 0;
}

.hero-name {
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.hero-bio {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 840px;
  line-height: 1.6;
}

.hero-bio strong {
  color: var(--text-primary);
}

.hero-contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.65rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

.contact-link {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--border-subtle);
  transition: color 0.15s ease;
}

.contact-link:hover {
  color: #0071e3;
}

/* --- TIMELINE FEED & PRODUCT ROWS --- */
.timeline-feed {
  display: flex;
  flex-direction: column;
  position: relative;
  --metro-x: max(1.25rem, calc(50% - 600px));
}

.product-row {
  --route-color: var(--line-independent);
  --route-fill: var(--route-color);
  --station-led-color: #ff2d20;
  --station-y: 50%;
  padding: clamp(3.5rem, 6.5vw, 5rem) 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  background:
    radial-gradient(circle at 82% 48%, color-mix(in srgb, var(--accent-color) 16%, transparent), transparent 44%),
    var(--row-bg);
  position: relative;
  transition: background-color 0.25s ease;
  scroll-margin-top: 1rem;
}

.product-row::before {
  content: "";
  position: absolute;
  z-index: 2;
  top: -1px;
  bottom: -1px;
  left: var(--metro-x);
  width: 8px;
  background: var(--route-fill);
  box-shadow: none;
  transform: translateX(-50%);
}

.product-row:first-of-type::before {
  top: var(--station-y);
  border-radius: 999px 999px 0 0;
}

.product-row:last-of-type::before {
  bottom: calc(100% - var(--station-y));
  border-radius: 0 0 999px 999px;
}

.product-row > *:not(.metro-station) {
  position: relative;
  z-index: 1;
}

.metro-station {
  position: absolute;
  z-index: 4;
  top: var(--station-y);
  left: var(--metro-x);
  width: 22px;
  height: 22px;
  border: 5px solid var(--route-color);
  border-radius: 50%;
  background: var(--bg-page);
  box-shadow: none;
  transform: translate(-50%, -50%);
  transition: background-color 200ms ease, box-shadow 240ms ease;
}

.metro-station::before {
  content: "";
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    #ffffff 0 16%,
    color-mix(in srgb, var(--station-led-color) 42%, #ffffff) 34%,
    var(--station-led-color) 76%
  );
  opacity: 0;
  transform: scale(0.45);
  box-shadow: 0 0 0 transparent;
  transition: opacity 700ms ease-out, transform 700ms ease-out, box-shadow 700ms ease-out;
}

.metro-station::after {
  content: attr(title);
  position: absolute;
  top: 50%;
  left: 20px;
  padding: 0.28rem 0.5rem;
  border: 1px solid var(--border-card);
  border-radius: 7px;
  background: var(--card-surface);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transform: translate(4px, -50%);
  transition: opacity 160ms ease, transform 160ms ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.metro-station:hover::after,
.metro-station:focus-visible::after {
  opacity: 1;
  transform: translate(0, -50%);
}

.product-row.is-past .metro-station {
  background: var(--bg-page);
}

.product-row.is-active .metro-station {
  border-color: var(--route-color);
  background: var(--bg-page);
  box-shadow: none;
}

.product-row.is-active .metro-station::before {
  opacity: 1;
  transform: scale(1);
  box-shadow:
    0 0 7px 2px color-mix(in srgb, var(--station-led-color) 72%, transparent),
    0 0 15px 4px color-mix(in srgb, var(--station-led-color) 36%, transparent);
  transition-duration: 240ms;
  transition-timing-function: ease-in;
}

/* Give the tiny active LED real luminance headroom on HDR-capable displays.
   The second background keeps the existing sRGB treatment as a fallback if
   the browser reports HDR but cannot decode the Rec. 2100 PQ JPEG XL asset. */
@media (dynamic-range: high) {
  .product-row.is-active .metro-station::before {
    dynamic-range-limit: no-limit;
    background:
      url("../hdr/metro-led-pq.jxl") center / cover no-repeat,
      radial-gradient(
        circle,
        #ffffff 0 16%,
        color-mix(in srgb, var(--station-led-color) 42%, #ffffff) 34%,
        var(--station-led-color) 76%
      );
  }
}

.row-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2.5rem, 6vw, 4.5rem);
  align-items: center;
}

/* --- CONTENT COLUMN --- */
.content-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.tag-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.timestamp {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-color);
  letter-spacing: -0.01em;
}

.category-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  background: var(--badge-bg);
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border-card);
}

.product-title {
  font-size: clamp(1.9rem, 3.8vw, 2.45rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text-primary);
}

.product-tagline {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-top: -0.4rem;
  line-height: 1.45;
}

.product-description {
  max-width: 42rem;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.65;
}

.work-summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.highlights-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding-left: 0.2rem;
}

.highlights-list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.highlights-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent-color);
  font-weight: 700;
}

.links-row {
  display: flex;
  gap: 0.85rem;
  margin-top: 0.25rem;
}

.row-action-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-color);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity 0.15s ease;
}

.row-action-link:hover {
  opacity: 0.8;
}

.naming-suggestion-row {
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* ==========================================================================
   INTERACTIVE SHOWCASE DECK (Layered Cards with Hover Reaction)
   ========================================================================== */

.showcase-col {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  isolation: isolate;
  min-height: 280px;
}

.showcase-deck {
  position: relative;
  width: 100%;
  max-width: 380px;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  perspective: 1000px;
  cursor: pointer;
}

/* Base Deck Card */
.deck-card {
  position: absolute;
  border-radius: 16px;
  background: var(--card-surface);
  border: 1px solid var(--border-card);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transition: transform 0.4s var(--ease-spring), box-shadow 0.4s var(--ease-spring), z-index 0.2s ease;
  will-change: transform;
}

/* Hero App Icon Card */
.hero-icon-card {
  width: 88px;
  height: 88px;
  border-radius: 20px; /* Apple squircle radius */
  overflow: hidden;
  z-index: 10;
  top: 15px;
  left: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.hero-icon-card:hover {
  transform: translateY(-8px) scale(1.08) !important;
  box-shadow: none !important;
}

.custom-icon {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
}

.icon-emoji {
  font-size: 2.5rem;
}

.icon-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.icon-svg {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 10px;
}

.icon-light { display: block; }
.icon-dark { display: none; }

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

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

/* Preview & Screenshot Cards Stacking */
.preview-card {
  padding: 1rem;
}

/* Depth Levels - Resting Positions */
.preview-card.depth-1 {
  width: 250px;
  top: 40px;
  left: 75px;
  z-index: 5;
  transform: rotate(2deg) scale(0.96);
}

.preview-card.depth-2 {
  width: 210px;
  top: 160px;
  left: 30px;
  z-index: 6;
  transform: rotate(-3deg) scale(0.94);
}

/* Hover Spread & Fanning Effect */
.showcase-deck:hover .hero-icon-card {
  transform: translateY(-6px) rotate(-2deg) scale(1.04);
}

.showcase-deck:hover .preview-card.depth-1 {
  transform: translate(25px, -12px) rotate(0deg) scale(1.02);
  z-index: 8;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
}

.showcase-deck:hover .preview-card.depth-2 {
  transform: translate(-10px, 16px) rotate(-1.5deg) scale(1.01);
  z-index: 9;
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.1);
}

/* --- SCREENSHOT DECKS (Headway & LeetTrack) --- */
.showcase-deck.has-screenshots {
  min-height: 280px;
}

.shot-card {
  width: 120px;
  aspect-ratio: 9 / 19.5;
  overflow: hidden;
}

.shot-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.theme-bookshelf .shot-card::before {
  position: absolute;
  top: 1.6%;
  left: 50%;
  width: 31.18%;
  aspect-ratio: 188 / 55;
  border-radius: 999px;
  background: #000000;
  content: "";
  pointer-events: none;
  transform: translateX(-50%);
  z-index: 2;
}

.shot-card.depth-1 {
  top: 15px;
  left: 90px;
  z-index: 5;
  transform: rotate(-3deg);
}

.shot-card.depth-2 {
  top: 30px;
  left: 175px;
  z-index: 4;
  transform: rotate(2.5deg);
}

.shot-card.depth-3 {
  top: 45px;
  left: 250px;
  z-index: 3;
  transform: rotate(6deg);
}

/* Hover Fanning for Screenshots */
.showcase-deck.has-screenshots:hover .shot-card.depth-1 {
  transform: translate(-15px, -8px) rotate(-5deg) scale(1.04);
  z-index: 8;
}

.showcase-deck.has-screenshots:hover .shot-card.depth-2 {
  transform: translate(5px, -14px) rotate(0deg) scale(1.06);
  z-index: 9;
}

.showcase-deck.has-screenshots:hover .shot-card.depth-3 {
  transform: translate(25px, -6px) rotate(5deg) scale(1.04);
  z-index: 7;
}

/* Individual card direct hover */
.deck-card:hover {
  z-index: 25 !important;
  transform: translateY(-8px) scale(1.06) !important;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.16) !important;
}

.deck-card.hero-icon-card:hover {
  box-shadow: none !important;
}

/* --- MOCK COMPONENT DETAILS --- */
/* BookShelf */
.bookshelf-card-1 {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.mock-widget-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.mock-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-color);
}

.mock-book-content {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.mock-book-cover {
  width: 38px;
  height: 56px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--accent-color), #854d0e);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  flex-shrink: 0;
}

.mock-book-meta {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex-grow: 1;
}

.mock-bar-long {
  height: 7px;
  width: 80%;
  background: var(--text-primary);
  opacity: 0.7;
  border-radius: 4px;
}

.mock-bar-short {
  height: 5px;
  width: 50%;
  background: var(--text-muted);
  opacity: 0.5;
  border-radius: 4px;
}

.mock-progress-track {
  height: 4px;
  background: var(--border-subtle);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 0.15rem;
}

.mock-progress-fill {
  height: 100%;
  background: var(--accent-color);
}

.mock-caption {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

.goal-pill {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-color);
}

.streak-mini {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

/* Wobbit */
.wobbit-video-deck {
  min-height: 280px;
}

.wobbit-video-deck .hero-icon-card {
  top: 96px;
  left: 0;
  z-index: 12;
}

.wobbit-demo-video {
  position: absolute;
  z-index: 5;
  top: 0;
  right: 0;
  width: min(300px, calc(100% - 74px));
  aspect-ratio: 612 / 568;
  object-fit: cover;
  display: block;
  border: 1px solid var(--border-card);
  border-radius: 18px;
  background: #4b83bc;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

/* ASO */
.aso-screenshot-deck {
  min-height: 280px;
}

.aso-screenshot-deck .hero-icon-card {
  top: 96px;
  left: 0;
}

.aso-screenshot-card {
  z-index: 5;
  top: 0;
  right: 0;
  width: min(340px, calc(100% - 42px));
  aspect-ratio: 2424 / 1848;
  overflow: hidden;
  border: 0;
  background: transparent;
  box-shadow: none;
  transform: rotate(1deg);
}

.aso-screenshot-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.aso-screenshot-deck:hover .aso-screenshot-card {
  transform: translate(8px, -4px) rotate(0deg) scale(1.02);
}

/* Zeplin */
.zeplin-brand-card {
  background: transparent;
}

.theme-zeplin .showcase-col,
.zeplin-screenshot-deck {
  min-height: 350px;
}

.zeplin-shot {
  overflow: hidden;
  aspect-ratio: 3264 / 2016;
  border-radius: 12px;
}

.zeplin-shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.zeplin-shot.depth-1 {
  top: 12px;
  left: 70px;
  z-index: 3;
  width: 290px;
  transform: rotate(1.5deg);
}

.zeplin-shot.depth-2 {
  top: 106px;
  left: 14px;
  z-index: 4;
  width: 270px;
  transform: rotate(-2deg);
}

.zeplin-shot.depth-3 {
  top: 198px;
  left: 108px;
  z-index: 5;
  width: 250px;
  transform: rotate(1deg);
}

.zeplin-screenshot-deck:hover .zeplin-shot.depth-1 {
  transform: translate(12px, -8px) rotate(0.5deg) scale(1.02);
}

.zeplin-screenshot-deck:hover .zeplin-shot.depth-2 {
  transform: translate(-10px, 1px) rotate(-1deg) scale(1.02);
}

.zeplin-screenshot-deck:hover .zeplin-shot.depth-3 {
  transform: translate(12px, 8px) rotate(0deg) scale(1.02);
}

/* Akbank Mobile */
.akbank-brand-card,
.direkt-brand-card {
  background: transparent;
}

/* Akbank product branch */
.theme-akbank {
  --branch-y: 0px;
  --branch-end-x: 100%;
  --branch-end-y: 100%;
  --branch-turn: 60px;
  --main-line-width: 8px;
  --branch-line-width: 8px;
  --parallel-gap: 1px;
  --parallel-offset: 9px;
  --branch-overlap: 8px;
}

.akbank-through-line {
  position: absolute !important;
  z-index: 3 !important;
  top: var(--station-y);
  bottom: -1px;
  left: var(--metro-x);
  width: var(--main-line-width);
  border-radius: 0;
  background: var(--line-start);
  box-shadow: none;
  transform: translateX(-50%);
  pointer-events: none;
}

.akbank-route-svg {
  position: absolute !important;
  z-index: 3 !important;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.akbank-route-path {
  fill: none;
  stroke: var(--line-akbank);
  stroke-width: 8;
  stroke-linecap: butt;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.akbank-branch {
  z-index: 4 !important;
  max-width: 1080px;
  margin: calc(2.75rem + var(--branch-turn)) auto 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  position: relative;
}

.branch-product {
  position: relative;
  min-height: 180px;
  margin-top: 2rem;
  padding: 1.15rem;
  border: 1px solid color-mix(in srgb, var(--accent-color) 22%, var(--border-card));
  border-radius: 16px;
  background: color-mix(in srgb, var(--card-surface) 90%, var(--accent-color));
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
  transition: transform 220ms var(--ease-apple), box-shadow 220ms ease;
}

.branch-face {
  position: absolute;
  inset: 1.15rem;
}

.branch-station {
  position: absolute;
  z-index: 2;
  top: -2.7rem;
  left: 1.75rem;
  width: 20px;
  height: 20px;
  border: 5px solid var(--line-akbank);
  border-radius: 50%;
  background: var(--bg-page);
  box-shadow: none;
}

.theme-akbank .metro-station {
  z-index: 6;
  box-shadow: 0 0 0 2px var(--bg-page),
              0 0 0 7px var(--line-akbank),
              0 0 0 9px var(--bg-page),
              0 0 0 12px var(--line-start);
}

.theme-akbank.is-active .metro-station {
  background: var(--bg-page);
  box-shadow: 0 0 0 2px var(--bg-page),
              0 0 0 7px var(--line-akbank),
              0 0 0 9px var(--bg-page),
              0 0 0 12px var(--line-start);
}

.theme-aso .metro-station {
  box-shadow: 0 0 0 2px var(--bg-page),
              0 0 0 7px var(--line-zeplin);
}

.theme-aso.is-active .metro-station {
  background: var(--bg-page);
  box-shadow: 0 0 0 2px var(--bg-page),
              0 0 0 7px var(--line-zeplin);
}

.branch-product:hover {
  transform: none;
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.1);
}

.branch-product-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.branch-icon-wrap {
  width: 48px;
  height: 48px;
  flex: 0 0 auto;
  overflow: hidden;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 12px;
  background: transparent;
  box-shadow: none;
}

.branch-icon-svg,
.branch-icon-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.branch-icon-svg {
  padding: 6px;
}

[data-theme="dark"] .branch-icon-svg {
  filter: invert(1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .branch-icon-svg {
    filter: invert(1);
  }
}

.branch-date {
  display: block;
  margin-bottom: 0.1rem;
  color: var(--accent-color);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
}

.branch-product h3 {
  font-size: 1.05rem;
  line-height: 1.2;
}

.branch-product p {
  color: var(--text-secondary);
  font-size: 0.86rem;
  line-height: 1.55;
}

.branch-action-link {
  display: inline-block;
  margin-top: 0.45rem;
  font-size: 0.78rem;
}

/* ==========================================================================
   DERIVED PRODUCT THEMES (Unique colors per product row)
   ========================================================================== */

/* 1. BookShelf */
.theme-bookshelf {
  --route-color: var(--line-independent);
  --accent-color: #c25e1a;
  --row-bg: rgba(194, 94, 26, 0.035);
  --badge-bg: rgba(194, 94, 26, 0.08);
  --card-surface: #ffffff;
  --pill-bg: #f4efe9;
  --pill-text: #603813;
}

.icon-bookshelf {
  background: linear-gradient(135deg, #c25e1a, #854d0e);
}

/* 2. Wobbit */
.theme-wobbit {
  --route-color: var(--line-independent);
  --accent-color: #7c3aed;
  --row-bg: rgba(124, 58, 237, 0.035);
  --badge-bg: rgba(124, 58, 237, 0.08);
  --card-surface: #ffffff;
  --pill-bg: #f3effe;
  --pill-text: #581c87;
}

.icon-wobbit {
  background: linear-gradient(135deg, #7c3aed, #4f46e5);
}

/* 3. Headway */
.theme-headway {
  --route-color: var(--line-independent);
  --accent-color: #1f8f6a;
  --row-bg: rgba(31, 143, 106, 0.04);
  --badge-bg: rgba(31, 143, 106, 0.08);
  --card-surface: #ffffff;
  --pill-bg: #eaf5f0;
  --pill-text: #064e3b;
}

/* 4. LeetTrack */
.theme-leettrack {
  --route-color: var(--line-independent);
  --route-fill: var(--line-independent);
  --accent-color: #ea580c;
  --row-bg: rgba(234, 88, 12, 0.035);
  --badge-bg: rgba(234, 88, 12, 0.08);
  --card-surface: #ffffff;
  --pill-bg: #fef2ea;
  --pill-text: #7c2d12;
}

/* 5. ASOResearchTool */
.theme-aso {
  --route-color: var(--line-independent);
  --route-fill: linear-gradient(
    to bottom,
    var(--line-independent) 0 var(--station-y),
    var(--line-zeplin) var(--station-y) 100%
  );
  --accent-color: #0284c7;
  --row-bg: rgba(2, 132, 199, 0.035);
  --badge-bg: rgba(2, 132, 199, 0.08);
  --card-surface: #ffffff;
  --pill-bg: #e6f3fa;
  --pill-text: #075985;
}

.icon-aso {
  background: linear-gradient(135deg, #0284c7, #0891b2);
}

/* 6. Zeplin */
.theme-zeplin {
  --route-color: var(--line-zeplin);
  --route-fill: var(--line-zeplin);
  --accent-color: #d97706;
  --row-bg: rgba(246, 152, 51, 0.045);
  --badge-bg: rgba(246, 152, 51, 0.09);
  --card-surface: #ffffff;
  --pill-bg: #fef7ed;
  --pill-text: #78350f;
}

/* 7. Akbank Mobile */
.theme-akbank {
  --route-color: var(--line-zeplin);
  --route-fill: linear-gradient(
    to bottom,
    var(--line-zeplin) 0 var(--station-y),
    transparent var(--station-y) 100%
  );
  --accent-color: #dc0005;
  --row-bg: rgba(220, 0, 5, 0.035);
  --badge-bg: rgba(220, 0, 5, 0.08);
  --card-surface: #ffffff;
  --pill-bg: #feeceb;
  --pill-text: #7f1d1d;
}

/* 8. Early work */
.theme-early-work {
  --route-color: var(--line-start);
  --route-fill: var(--line-start);
  --accent-color: #198754;
  --row-bg: rgba(22, 124, 128, 0.055);
  --badge-bg: rgba(22, 124, 128, 0.1);
  --card-surface: #ffffff;
  --pill-bg: #e8f4f3;
  --pill-text: #115e59;
}

.early-work-inner {
  grid-template-columns: minmax(0, 760px);
  justify-content: start;
}

.theme-early-work .product-description a {
  color: var(--text-primary);
  font-weight: 600;
  text-decoration-color: color-mix(in srgb, var(--accent-color) 55%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.theme-early-work .product-description a:hover {
  color: var(--accent-color);
}

/* Dark Mode Overrides */
[data-theme="dark"] .theme-bookshelf,
:root:not([data-theme="light"]) .theme-bookshelf {
  --accent-color: #f59e0b;
  --row-bg: rgba(194, 94, 26, 0.1);
  --badge-bg: rgba(194, 94, 26, 0.2);
  --card-surface: #171412;
  --pill-bg: #261c14;
  --pill-text: #fcd34d;
}

[data-theme="dark"] .theme-wobbit,
:root:not([data-theme="light"]) .theme-wobbit {
  --accent-color: #a78bfa;
  --row-bg: rgba(124, 58, 237, 0.1);
  --badge-bg: rgba(124, 58, 237, 0.2);
  --card-surface: #14121a;
  --pill-bg: #201a2e;
  --pill-text: #ddd6fe;
}

[data-theme="dark"] .theme-headway,
:root:not([data-theme="light"]) .theme-headway {
  --accent-color: #34d399;
  --row-bg: rgba(31, 143, 106, 0.1);
  --badge-bg: rgba(31, 143, 106, 0.2);
  --card-surface: #101614;
  --pill-bg: #14241d;
  --pill-text: #a7f3d0;
}

[data-theme="dark"] .theme-aso,
:root:not([data-theme="light"]) .theme-aso {
  --accent-color: #38bdf8;
  --row-bg: rgba(2, 132, 199, 0.1);
  --badge-bg: rgba(2, 132, 199, 0.2);
  --card-surface: #10151a;
  --pill-bg: #14222e;
  --pill-text: #bae6fd;
}

[data-theme="dark"] .theme-leettrack,
:root:not([data-theme="light"]) .theme-leettrack {
  --accent-color: #fb923c;
  --row-bg: rgba(234, 88, 12, 0.1);
  --badge-bg: rgba(234, 88, 12, 0.2);
  --card-surface: #181310;
  --pill-bg: #2a1b14;
  --pill-text: #fed7aa;
}

[data-theme="dark"] .theme-zeplin,
:root:not([data-theme="light"]) .theme-zeplin {
  --accent-color: #fbbf24;
  --row-bg: rgba(246, 152, 51, 0.1);
  --badge-bg: rgba(246, 152, 51, 0.2);
  --card-surface: #181510;
  --pill-bg: #2b2114;
  --pill-text: #fde68a;
}

[data-theme="dark"] .theme-akbank,
:root:not([data-theme="light"]) .theme-akbank {
  --accent-color: #f87171;
  --row-bg: rgba(220, 0, 5, 0.1);
  --badge-bg: rgba(220, 0, 5, 0.2);
  --card-surface: #191111;
  --pill-bg: #2d1414;
  --pill-text: #fca5a5;
}

[data-theme="dark"] .theme-early-work,
:root:not([data-theme="light"]) .theme-early-work {
  --accent-color: #4fd1c5;
  --row-bg: rgba(22, 124, 128, 0.12);
  --badge-bg: rgba(22, 124, 128, 0.22);
  --card-surface: #101919;
  --pill-bg: #142827;
  --pill-text: #99f6e4;
}

/* --- FOOTER --- */
.timeline-tail-space {
  position: relative;
  height: clamp(22rem, 48vh, 36rem);
  height: clamp(22rem, 48svh, 36rem);
  background: var(--bg-page);
}

.finale-copy {
  position: absolute;
  left: 50%;
  bottom: clamp(17.5rem, 31vh, 20.5rem);
  width: min(760px, calc(100% - 3rem));
  text-align: center;
  transform: translateX(-50%);
}

.finale-thanks,
.finale-copy h2 {
  opacity: 0;
  transform: translateY(12px);
}

.finale-thanks {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 550;
  transition: opacity 420ms ease, transform 520ms var(--ease-apple);
}

.finale-copy h2 {
  margin-top: 0.35rem;
  color: var(--text-primary);
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
  transition: opacity 480ms ease 160ms, transform 600ms var(--ease-apple) 160ms;
}

.finale-is-revealed .finale-thanks,
.finale-is-revealed .finale-copy h2 {
  opacity: 1;
  transform: translateY(0);
}

.timeline-footer {
  position: relative;
  padding: 3rem 1.5rem;
  border-top: 1px solid var(--footer-floor-line);
  background: var(--footer-surface);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.footer-kiki-scene {
  position: absolute;
  left: max(1.5rem, calc(50% - 540px));
  bottom: calc(100% - 15px);
  width: clamp(280px, 25vw, 350px);
  height: 240px;
  pointer-events: none;
  user-select: none;
}

.footer-kiki {
  position: absolute;
  left: 0;
  bottom: 0;
  width: clamp(140px, 15vw, 210px);
  height: auto;
  display: block;
  opacity: 0;
  transform: translateY(36px) rotate(-1deg);
  transform-origin: 45% 100%;
  transition: opacity 280ms ease 430ms, transform 760ms var(--ease-spring) 430ms;
}

.kiki-bubble {
  position: absolute;
  top: -8px;
  left: clamp(50px, 5vw, 68px);
  padding: 0.42rem 0.65rem;
  border: 1px solid var(--border-card);
  border-radius: 12px 12px 12px 4px;
  background: var(--bg-page);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 650;
  white-space: nowrap;
  opacity: 0;
  transform: translate(-5px, 7px) scale(0.92);
  transform-origin: bottom left;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transition: opacity 280ms ease 3000ms, transform 420ms var(--ease-spring) 3000ms;
}

.finale-is-revealed .footer-kiki {
  opacity: 1;
  transform: translateY(0) rotate(0);
}

.finale-is-revealed .kiki-bubble {
  opacity: 1;
  transform: translate(0, 0) scale(1);
}

.footer-inner a {
  color: var(--text-secondary);
  text-decoration: none;
}

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

/* --- TOAST POPUP --- */
.toast-popup {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--text-primary);
  color: var(--bg-page);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: all 0.2s var(--ease-apple);
  z-index: 1000;
}

.toast-popup.show {
  opacity: 1;
  transform: translateY(0);
}

/* --- RESPONSIVE LAYOUT (Mobile: vertical stack) --- */
@media (min-width: 981px) and (max-width: 1280px) {
  .timeline-feed {
    --metro-x: max(2rem, calc(50% - 600px));
  }

  .product-row {
    padding-left: 4.5rem;
  }

  .theme-akbank {
    --branch-turn: 52px;
  }

  .footer-kiki-scene {
    left: 4.5rem;
  }
}

@media (max-width: 980px) {
  .timeline-header {
    min-height: clamp(480px, 76vh, 620px);
    min-height: clamp(480px, 76svh, 620px);
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
  }

  .hero-block {
    padding: clamp(2.75rem, 7vh, 4.5rem) 0;
  }

  .top-bar {
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.85rem;
  }

  .header-actions {
    margin-left: auto;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .timeline-tail-space {
    height: clamp(20rem, 52svh, 30rem);
  }

  .finale-copy {
    left: 50%;
    bottom: 14.5rem;
    width: calc(100% - 3rem);
  }

  .footer-kiki-scene {
    left: 3.75rem;
    bottom: calc(100% - 13px);
    width: min(270px, calc(100vw - 4.75rem));
    height: 200px;
  }

  .footer-kiki {
    width: clamp(125px, 42vw, 175px);
  }

  .kiki-bubble {
    top: -4px;
    left: clamp(42px, 13vw, 56px);
  }

  .timeline-feed {
    --metro-x: 1.75rem;
  }

  .product-row {
    padding-left: 3.75rem;
    padding-right: 1.1rem;
    background:
      radial-gradient(circle at 75% 20%, color-mix(in srgb, var(--accent-color) 17%, transparent), transparent 36%),
      var(--row-bg);
  }

  .metro-station::after {
    display: none;
  }

  .row-inner {
    grid-template-columns: 1fr;
    gap: 0;
  }

  /* Let the visual share the section flow without duplicating any content:
     year + title, visual/engineering panel, then the supporting copy. */
  .content-col {
    display: contents;
  }

  .tag-row {
    order: 1;
    margin-bottom: 0.65rem;
  }

  .product-title {
    order: 2;
  }

  .showcase-col {
    order: 3;
    min-height: 280px;
    margin: 1rem 0 1.25rem;
  }

  .product-tagline {
    order: 4;
    margin: 0 0 0.75rem;
  }

  .product-description,
  .work-summary {
    order: 5;
  }

  .links-row {
    order: 6;
    margin-top: 1rem;
  }

  .showcase-deck {
    max-width: 320px;
    min-height: 220px;
  }

  .hero-icon-card {
    width: 72px;
    height: 72px;
    border-radius: 16px;
  }

  .shot-card {
    width: 95px;
  }

  .shot-card.depth-1 { left: 75px; }
  .shot-card.depth-2 { left: 145px; }
  .shot-card.depth-3 { left: 205px; }

  .preview-card.depth-1 {
    width: 210px;
    left: 65px;
  }

  .preview-card.depth-2 {
    width: 180px;
    left: 20px;
  }

  .wobbit-video-deck {
    min-height: 245px;
  }

  .wobbit-video-deck .hero-icon-card {
    top: 86px;
    left: 0;
  }

  .wobbit-demo-video {
    width: min(260px, calc(100% - 54px));
    border-radius: 16px;
  }

  .theme-zeplin .showcase-col,
  .zeplin-screenshot-deck {
    min-height: 290px;
  }

  .zeplin-shot.depth-1 {
    top: 8px;
    left: 54px;
    width: 230px;
  }

  .zeplin-shot.depth-2 {
    top: 82px;
    left: 4px;
    width: 215px;
  }

  .zeplin-shot.depth-3 {
    top: 158px;
    left: 66px;
    width: 200px;
  }

  .akbank-branch {
    grid-template-columns: 1fr;
    gap: 0.85rem;
    padding-left: 1.5rem;
  }

  .theme-akbank {
    --branch-turn: 40px;
  }

  .branch-product {
    min-height: 190px;
    margin-top: 0.6rem;
  }

  .branch-station {
    top: 1.5rem;
    left: calc(-2.125rem + var(--parallel-offset));
  }

}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .metro-station,
  .branch-product,
  .showcase-deck {
    transition: none;
  }

  .metro-station::before {
    transition: none;
  }

  .finale-thanks,
  .finale-copy h2,
  .footer-kiki,
  .kiki-bubble {
    transition: none;
  }

}