/* =========================================================
   Demirhan KAYA — Portfolio
   Design tokens + base + components
   ========================================================= */

:root {
  /* Surfaces — warm, light */
  --bg: #FDFBF7;
  --bg-elevated: #F5F2EA;
  --card: #FFFFFF;
  --card-hover: #FFFDF9;

  /* Borders */
  --border: rgba(28, 26, 22, 0.09);
  --border-strong: rgba(28, 26, 22, 0.18);

  /* Text */
  --text-primary: #1C1A16;
  --text-secondary: #5B564C;
  --text-tertiary: #8C867A;

  /* Accent — controlled, single warm hue (terracotta), no purple */
  --accent: #A9491F;
  --accent-soft: rgba(169, 73, 31, 0.09);
  --accent-border: rgba(169, 73, 31, 0.32);
  --accent-glow: rgba(169, 73, 31, 0.16);
  --on-accent: #FFFDF9;

  /* Status */
  --status-green: #3C7A5A;

  /* Fonts */
  --font-serif: 'Fraunces', 'Iowan Old Style', serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Radii */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-full: 999px;

  /* Motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 0.2s;
  --dur-med: 0.5s;
  --dur-slow: 0.9s;

  --container-w: 1200px;
}

/* =========================== RESET =========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea { font: inherit; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 32px;
}

.icon {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

/* =========================== GLOBAL FX =========================== */
.noise-layer {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0.02;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: var(--accent);
  z-index: 999;
  transition: width 0.1s linear;
}

/* =========================== NAVBAR =========================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: padding var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
  border-bottom: 1px solid transparent;
}
.navbar.scrolled {
  padding: 14px 0;
  background: rgba(253, 251, 247, 0.78);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 15px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  position: relative;
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--dur-fast) var(--ease);
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -6px;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--dur-fast) var(--ease);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--text-primary); }
.nav-cta {
  padding: 8px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-full);
  color: var(--text-primary) !important;
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--accent-soft); border-color: var(--accent-border); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
}
.nav-toggle span {
  width: 20px;
  height: 1.5px;
  background: var(--text-primary);
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* =========================== BUTTONS =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: var(--r-full);
  font-size: 14.5px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
  white-space: nowrap;
}
.btn .icon { width: 16px; height: 16px; transition: transform var(--dur-fast) var(--ease); }
.btn:hover .icon { transform: translateX(3px); }
.btn-primary {
  background: var(--text-primary);
  color: var(--bg);
}
.btn-primary:hover {
  box-shadow: 0 8px 24px -10px rgba(28, 26, 22, 0.35);
  background: #33302A;
}
.btn-lg { padding: 16px 28px; font-size: 15.5px; }
.btn-ghost {
  border-color: var(--border-strong);
  color: var(--text-primary);
}
.btn-ghost:hover { background: rgba(28,26,22,0.04); border-color: var(--text-secondary); }
.btn-icon-text {
  color: var(--text-secondary);
  gap: 8px;
}
.btn-icon-text:hover { color: var(--text-primary); }
.magnetic { will-change: transform; }

/* =========================== HERO =========================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 0 80px;
  overflow: hidden;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(28,26,22,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28,26,22,0.028) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 10%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 10%, transparent 75%);
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
}
.hero-glow-1 {
  width: 480px; height: 480px;
  top: -160px; left: -100px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  animation: driftGlow 16s ease-in-out infinite alternate;
}
.hero-glow-2 {
  width: 380px; height: 380px;
  bottom: -160px; right: -100px;
  background: radial-gradient(circle, rgba(28,26,22,0.05), transparent 70%);
  animation: driftGlow 18s ease-in-out infinite alternate-reverse;
}
@keyframes driftGlow {
  from { transform: translate(0, 0); }
  to { transform: translate(30px, 24px); }
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 18px;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.03;
  color: var(--text-primary);
}

.hero-role {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 500;
  height: 1.6em;
}
.hero-role-prefix { color: var(--accent); }
.hero-role-text {
  color: var(--text-secondary);
  display: inline-block;
}
.hero-role-text.swap-out { animation: swapOut 0.35s var(--ease) forwards; }
.hero-role-text.swap-in { animation: swapIn 0.4s var(--ease) forwards; }
@keyframes swapOut {
  to { opacity: 0; transform: translateY(-10px); filter: blur(3px); }
}
@keyframes swapIn {
  from { opacity: 0; transform: translateY(10px); filter: blur(3px); }
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}

.hero-lead {
  margin-top: 26px;
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  font-weight: 500;
  color: var(--text-primary);
  max-width: 640px;
}
.hero-lead-en {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
}
.hero-desc {
  margin-top: 20px;
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 540px;
  line-height: 1.7;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

/* Hero visual */
.hero-visual {
  position: relative;
  height: 460px;
}
.hero-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.flow-line {
  stroke: var(--border-strong);
  stroke-width: 1;
  fill: none;
  stroke-dasharray: 4 6;
  animation: dashMove 6s linear infinite;
}
@keyframes dashMove { to { stroke-dashoffset: -100; } }

.float-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 24px 60px -30px rgba(28, 26, 22, 0.22);
  padding: 16px;
  animation: floatY 6s ease-in-out infinite;
}
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.card-endpoint {
  width: 250px;
  top: 20px; left: 0;
  animation-delay: 0s;
}
.card-head { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.method-badge {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 5px;
}
.method-post { background: var(--accent-soft); color: var(--accent); }
.card-path { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-secondary); }
.card-line {
  height: 6px;
  border-radius: 4px;
  background: rgba(28,26,22,0.07);
  margin-bottom: 8px;
}
.card-line.short { width: 60%; }
.card-status {
  display: flex; align-items: center; gap: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-tertiary);
  margin-top: 10px;
}
.dot { width: 6px; height: 6px; border-radius: 50%; }
.dot-live { background: var(--status-green); }

.card-chart {
  width: 210px;
  top: 250px; left: 40px;
  animation-delay: 1.4s;
}
.card-label { font-family: var(--font-mono); font-size: 11px; color: var(--text-secondary); }
.mini-bars {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 60px;
  margin-top: 12px;
}
.mini-bars span {
  flex: 1;
  height: var(--h);
  border-radius: 3px 3px 0 0;
  background: linear-gradient(180deg, var(--accent), rgba(169,73,31,0.25));
}

.card-mobile {
  width: 118px;
  height: 205px;
  top: 40px; right: 20px;
  padding: 0;
  overflow: hidden;
  animation-delay: 0.7s;
}
.card-mobile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  border-radius: inherit;
}

.card-logos {
  width: 190px;
  top: 300px; right: 0;
  animation-delay: 2.1s;
}
.card-logos-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}
.card-logos-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.card-logos-row img {
  height: 18px;
  width: auto;
  max-width: 56px;
  object-fit: contain;
}

.scroll-hint {
  position: absolute;
  bottom: 32px; left: 50%;
  transform: translateX(-50%);
  width: 24px; height: 38px;
  border: 1.5px solid var(--border-strong);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 7px;
  z-index: 2;
}
.scroll-hint span {
  width: 3px; height: 7px;
  border-radius: 2px;
  background: var(--text-secondary);
  animation: scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot {
  0% { opacity: 1; transform: translateY(0); }
  70% { opacity: 0; transform: translateY(10px); }
  100% { opacity: 0; }
}

/* =========================== SECTION SHARED =========================== */
.section { padding: 130px 0; position: relative; }
#about { padding-top: 70px; }
#projects { padding-top: 70px; }
.section-head { max-width: 680px; margin-bottom: 64px; }
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.18;
  margin-top: 6px;
}
.section-sub {
  margin-top: 14px;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.6;
}

/* =========================== ABOUT =========================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.about-text p {
  color: var(--text-secondary);
  font-size: 16.5px;
  line-height: 1.8;
  margin-bottom: 18px;
}
.about-text p:first-child { color: var(--text-primary); font-size: 19px; font-weight: 500; }

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-border);
  background: var(--card-hover);
}
.stat-icon {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 4px;
}
.stat-title { font-weight: 700; font-size: 15px; }
.stat-desc { font-size: 13.5px; color: var(--text-tertiary); line-height: 1.5; }
.stat-card-wide { grid-column: span 2; flex-direction: row; align-items: center; gap: 18px; }
.stat-card-wide .stat-icon { margin-bottom: 0; }

/* =========================== PROJECTS =========================== */
.project-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 64px 0;
  border-top: 1px solid var(--border);
}
.project-card:last-child { padding-bottom: 0; }
.project-card:first-of-type { border-top: none; padding-top: 0; }
.project-card-reverse .project-text { order: 2; }
.project-card-reverse .project-visual { order: 1; }

.project-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.project-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}
.project-category {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
}
.badge-dev {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: var(--r-full);
  background: rgba(28,26,22,0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border-strong);
}
.project-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}
.project-title-with-logo {
  display: flex;
  align-items: center;
  gap: 14px;
}
.project-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 9px;
  background: var(--card);
  border: 1px solid var(--border);
  padding: 6px;
}
.project-logo-wide {
  width: auto;
  height: 38px;
  border: none;
  background: none;
  padding: 0;
  border-radius: 0;
}
.project-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 16px;
  border-bottom: 1px solid var(--accent-border);
}
.project-desc {
  color: var(--text-secondary);
  font-size: 15.5px;
  line-height: 1.75;
  margin-bottom: 26px;
}

.psr-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 26px;
}
.psr-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 16px 18px;
}
.psr-item-wide { grid-column: span 2; }
.psr-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 6px;
}
.psr-item p { font-size: 13.5px; color: var(--text-secondary); line-height: 1.55; }

.feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 20px;
  margin-bottom: 24px;
}
.feature-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--text-secondary);
}
.feature-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 8px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: var(--r-full);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: var(--card);
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.tag:hover { border-color: var(--accent-border); color: var(--accent); background: var(--accent-soft); }

.project-visual { position: relative; }

/* Browser window mockup — real product screenshots */
.browser-mockup {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 30px 70px -35px rgba(28, 26, 22, 0.35);
  background: var(--card);
  margin-bottom: 20px;
}
.browser-mockup-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 11px 14px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}
.browser-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--border-strong);
}
.browser-mockup img {
  display: block;
  width: 100%;
  height: auto;
}

/* Architecture diagram */
.arch-diagram {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  box-shadow: 0 30px 70px -40px rgba(28,26,22,0.16);
}
.arch-flow { display: flex; flex-direction: column; align-items: stretch; gap: 0; }
.arch-node {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  padding: 13px 16px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.arch-node-final { border-color: var(--accent-border); background: var(--accent-soft); color: var(--accent); }
.arch-connector {
  position: relative;
  height: 30px;
  margin: 0 auto;
  width: 2px;
  background: var(--border);
}
.arch-connector i {
  position: absolute;
  left: 50%;
  top: -3px;
  width: 6px; height: 6px;
  margin-left: -3px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px 1px var(--accent-glow);
  animation: flowDown 2.2s linear infinite;
}
@keyframes flowDown {
  0% { top: -3px; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { top: 27px; opacity: 0; }
}
.arch-side {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding-top: 20px;
  border-top: 1px dashed var(--border);
}
.arch-side-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  width: 100%;
  margin-bottom: 4px;
}
.arch-chip {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 7px 12px;
  border-radius: var(--r-full);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: var(--bg-elevated);
}

.arch-consent .arch-flow-vertical .arch-node { width: 100%; }

/* Phone mockups */
.phone-mockup {
  width: 240px;
  margin: 0 auto;
  aspect-ratio: 9 / 18.5;
  background: linear-gradient(160deg, #2A2723, #17150F);
  border: 1px solid rgba(28,26,22,0.5);
  border-radius: 34px;
  padding: 10px;
  box-shadow: 0 30px 70px -30px rgba(28, 26, 22, 0.4);
  position: relative;
}
.phone-notch {
  position: absolute;
  top: 10px; left: 50%;
  transform: translateX(-50%);
  width: 70px; height: 18px;
  background: #0F0D09;
  border-radius: 0 0 12px 12px;
  z-index: 2;
}
.phone-screen {
  height: 100%;
  width: 100%;
  background: var(--bg);
  border-radius: 24px;
  overflow: hidden;
  position: relative;
  padding: 30px 14px 16px;
  display: flex;
  flex-direction: column;
}

/* Receipt scanning */
.receipt-paper {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 12px;
  position: relative;
  overflow: hidden;
  margin-bottom: 16px;
  flex: 1;
}
.receipt-line { height: 6px; border-radius: 3px; background: rgba(28,26,22,0.10); margin-bottom: 9px; }
.receipt-line.w-60 { width: 60%; }
.receipt-line.w-40 { width: 40%; }
.receipt-line.w-80 { width: 80%; }
.receipt-line.w-50 { width: 50%; }
.receipt-line.w-70 { width: 70%; }
.receipt-scanline {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  box-shadow: 0 0 12px 2px var(--accent-glow);
  animation: scanMove 2.6s ease-in-out infinite;
}
@keyframes scanMove {
  0%, 100% { top: 6%; }
  50% { top: 92%; }
}
.ocr-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}
.ocr-step {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 5px 9px;
  border-radius: var(--r-full);
  border: 1px solid var(--border);
  color: var(--text-tertiary);
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.ocr-step.active {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--accent-soft);
}

/* Restart Play carousel — real product screenshots */
.phone-carousel {
  position: relative;
  height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.phone-shot {
  position: absolute;
  width: 190px;
  border-radius: 22px;
  box-shadow: 0 30px 70px -30px rgba(28, 26, 22, 0.35);
  transition: transform var(--dur-med) var(--ease);
}
.phone-shot-1 { transform: translateX(-90px) rotate(-8deg) scale(0.92); z-index: 1; }
.phone-shot-2 { transform: translateY(-10px) scale(1); z-index: 2; }
.phone-shot-3 { transform: translateX(90px) rotate(8deg) scale(0.92); z-index: 1; }

/* =========================== PROCESS ================================ */
.process-timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 28px;
}
.process-line {
  position: absolute;
  top: 11px; left: 0; right: 0;
  height: 1px;
  background: var(--border);
  z-index: 0;
}
.process-line i {
  display: block;
  height: 100%;
  width: var(--progress, 0%);
  background: var(--accent);
  transition: width 0.3s linear;
}
.process-step { position: relative; z-index: 1; }
.process-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--bg);
  background: var(--text-tertiary);
  width: 22px; height: 22px;
  line-height: 22px;
  text-align: center;
  border-radius: 50%;
  margin-bottom: 20px;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.process-step.in-view .process-num { background: var(--accent); color: var(--on-accent); }
.process-step h3 { font-family: var(--font-serif); font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.process-step p { font-size: 14.5px; color: var(--text-secondary); line-height: 1.6; }

/* =========================== STACK =========================== */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.stack-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 26px;
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.stack-card:hover { transform: translateY(-3px); border-color: var(--accent-border); }
.stack-cat {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.stack-card-wide { grid-column: span 2; }

/* =========================== PRODUCT THINKING =========================== */
.product-thinking { position: relative; overflow: hidden; background: var(--bg-elevated); }
.pt-grid-bg {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(28,26,22,0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(28,26,22,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 60% 80% at 80% 50%, black, transparent 70%);
  mask-image: radial-gradient(ellipse 60% 80% at 80% 50%, black, transparent 70%);
}
.pt-inner { position: relative; max-width: 720px; }
.pt-text {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.75;
  margin-top: 20px;
}

/* =========================== LAUNCH & DEPLOYMENT SUPPORT =========================== */
.launch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}
.launch-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.launch-card:hover { transform: translateY(-4px); border-color: var(--accent-border); }
.launch-icon {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 16px;
}
.launch-card h3 { font-family: var(--font-serif); font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.launch-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

.launch-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 32px 36px;
}
.launch-callout-text h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
  max-width: 480px;
}
.launch-callout-text p { font-size: 14.5px; color: var(--text-secondary); max-width: 480px; }

/* =========================== CONTACT =========================== */
.contact { text-align: center; position: relative; overflow: hidden; }
.contact-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 700px; height: 400px;
  background: radial-gradient(ellipse, var(--accent-glow), transparent 70%);
  pointer-events: none;
}
.contact-inner { position: relative; max-width: 640px; margin: 0 auto; }
.contact-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-top: 8px;
}
.contact-desc {
  margin-top: 20px;
  color: var(--text-secondary);
  font-size: 16.5px;
  line-height: 1.7;
}
.contact-cta { margin-top: 40px; }
.contact-socials {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  margin-top: 36px;
}
.social-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--dur-fast) var(--ease);
}
.social-link:hover { color: var(--accent); }

/* =========================== FOOTER =========================== */
.footer { border-top: 1px solid var(--border); padding: 40px 0; }
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-brand { display: flex; flex-direction: column; gap: 3px; }
.footer-name { font-weight: 700; font-size: 14.5px; }
.footer-tag { font-size: 12.5px; color: var(--text-tertiary); }
.footer-credit { font-size: 12.5px; color: var(--text-tertiary); }

/* =========================== SCROLL REVEAL =========================== */
.reveal-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  transition-delay: calc(var(--delay, 0) * 90ms);
}
.reveal-up.in-view { opacity: 1; transform: translateY(0); }

/* =========================== RESPONSIVE =========================== */
@media (max-width: 1080px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .project-card { grid-template-columns: 1fr; gap: 40px; }
  .project-card-reverse .project-text { order: 1; }
  .project-card-reverse .project-visual { order: 2; }
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
  .stack-card-wide { grid-column: span 2; }
  .launch-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: min(320px, 78vw);
    background: rgba(253, 251, 247, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: 28px;
    padding: 40px;
    transform: translateX(100%);
    transition: transform 0.4s var(--ease);
    border-left: 1px solid var(--border);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 17px; }
  .nav-toggle { display: flex; }
  .process-timeline { grid-template-columns: repeat(2, 1fr); row-gap: 48px; }
  .process-line { display: none; }
  .launch-callout { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .section { padding: 90px 0; }
  #about { padding-top: 50px; }
  #projects { padding-top: 50px; }
  .hero { padding-top: 120px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { justify-content: center; }
  .about-stats { grid-template-columns: 1fr; }
  .stat-card-wide { grid-column: span 1; }
  .psr-grid { grid-template-columns: 1fr; }
  .feature-list { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: 1fr; }
  .stack-card-wide { grid-column: span 1; }
  .process-timeline { grid-template-columns: 1fr; }
  .launch-grid { grid-template-columns: 1fr; }
  .phone-carousel { height: 340px; }
  .phone-shot-1, .phone-shot-3 { display: none; }
  .footer-inner { flex-direction: column; text-align: center; }
}