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

:root {
  --bg: #ffffff;
  --text: #0a0a0a;
  --accent: #FF6B35;
  --muted: #555555;
  --light-muted: #999999;
  --card-bg: #f5f5f5;
  --border: #e0e0e0;
  --radius: 14px;
  --radius-sm: 8px;
  --max-w: 1200px;
  --font: 'Space Grotesk', system-ui, -apple-system, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ===== Nav ===== */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  z-index: 100;
  border-bottom: 2px solid var(--text);
}

nav .nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2.5rem;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

nav .logo {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

nav .nav-links { display: flex; gap: 2.5rem; }

nav .nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color 0.2s;
}

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

/* ===== Hero ===== */
.hero {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  margin-top: 68px;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 520px;
  display: flex;
  align-items: flex-end;
  padding: 3.5rem;
  background: linear-gradient(135deg, #FF6B35 0%, #c23a6b 40%, #5b2a86 75%, #1a1a2e 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 620px;
}

.hero h1 {
  font-size: clamp(3rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  margin-bottom: 1.5rem;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: -0.03em;
}

.hero p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.8);
  max-width: 440px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.hero-tag {
  padding: 0.4rem 1rem;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.8rem;
  background: #fff;
  color: var(--text);
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.btn-dark {
  background: var(--text);
  color: #fff;
}

.btn .arrow { font-size: 1.1rem; }

/* ===== Section Headers ===== */
.section-header {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 6rem 2.5rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
  border-top: 2px solid var(--text);
}

.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--light-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-size: clamp(2rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.1;
  max-width: 480px;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

.section-header p {
  font-size: 0.9rem;
  color: var(--muted);
  max-width: 320px;
  text-align: right;
}

/* ===== Section Titles (simple) ===== */
.section-title {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 6rem 2.5rem 2rem;
  font-size: 2rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

/* ===== Project Grid ===== */
.projects-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2.5rem 6rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.project-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
  border: 2px solid transparent;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.08);
  border-color: var(--text);
}

.project-card .thumb {
  width: 100%;
  height: 360px;
  overflow: hidden;
}

.project-card .card-body {
  padding: 1.75rem;
}

.project-card .tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.project-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.55;
}

/* ===== Services / Skills Grid ===== */
.services {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2.5rem 6rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.service-card {
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  padding: 2rem 1.5rem;
  border: 2px solid transparent;
  transition: transform 0.2s, border-color 0.2s;
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--text);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 4px;
  background: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 1.25rem;
}

.service-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.service-card p {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.55;
}

/* ===== About Section ===== */
.about {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4rem 2.5rem 6rem;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 4rem;
  align-items: start;
}

.about-photo {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #FF6B35 0%, #c23a6b 50%, #5b2a86 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.03em;
}

.about-text h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.about-text p {
  color: var(--muted);
  margin-bottom: 1rem;
  max-width: 560px;
  line-height: 1.75;
}

.about-text .skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.75rem;
}

.about-text .skill-tag {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 2px solid var(--text);
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: background 0.2s, color 0.2s;
}

.about-text .skill-tag:hover {
  background: var(--text);
  color: #fff;
}

/* ===== Contact / CTA Section ===== */
.contact {
  max-width: var(--max-w);
  margin: 0 auto 2.5rem;
  padding: 4.5rem 3.5rem;
  background: var(--text);
  border-radius: var(--radius);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.contact h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.contact p {
  color: rgba(255,255,255,0.5);
  margin-top: 0.75rem;
  max-width: 400px;
  font-size: 0.9rem;
}

.contact .contact-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1rem;
}

.contact .contact-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.contact .contact-link {
  padding: 0.6rem 1.4rem;
  border: 2px solid rgba(255,255,255,0.15);
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.contact .contact-link:hover {
  border-color: var(--accent);
  color: #fff;
  background: var(--accent);
}

/* ===== Footer ===== */
footer {
  text-align: center;
  padding: 2.5rem 2.5rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--light-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

footer a {
  color: var(--text);
  font-weight: 700;
  border-bottom: 2px solid var(--accent);
}

/* ===== Project Detail Page ===== */
.project-hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 7.5rem 2.5rem 3rem;
}

.project-hero .back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 2rem;
  transition: color 0.2s;
}

.project-hero .back-link:hover { color: var(--accent); }

.project-hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.project-hero .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 2px solid var(--border);
}

.project-hero .meta strong {
  color: var(--text);
  font-weight: 700;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.25rem;
}

.project-hero-img {
  width: 100%;
  aspect-ratio: 16/8;
  border-radius: var(--radius);
  object-fit: cover;
}

.project-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 3rem 2.5rem 8rem;
}

.project-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 3rem 0 1.25rem;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  padding-top: 1rem;
  border-top: 2px solid var(--border);
}

.project-content h2:first-child {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.project-content p {
  color: var(--muted);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.project-content .image-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 2.5rem 0;
}

.project-content .image-row .placeholder-img {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.case-img {
  width: 100%;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 1px solid var(--border);
}

/* ===== Device Mockup ===== */
.device-mockup {
  background: #1a1a1a;
  border-radius: 12px;
  padding: 0;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15), 0 0 0 1px rgba(0,0,0,0.08);
}

.device-mockup .browser-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: #2a2a2a;
  border-bottom: 1px solid #333;
}

.device-mockup .browser-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.device-mockup .browser-dot.red { background: #ff5f57; }
.device-mockup .browser-dot.yellow { background: #febc2e; }
.device-mockup .browser-dot.green { background: #28c840; }

.device-mockup .browser-url {
  flex: 1;
  margin-left: 10px;
  background: #1a1a1a;
  border-radius: 4px;
  padding: 4px 12px;
  font-size: 0.68rem;
  color: #888;
  font-family: var(--font);
  letter-spacing: 0.02em;
}

.device-mockup img {
  width: 100%;
  display: block;
}

/* Laptop shell around the browser */
.laptop-mockup {
  padding: 16px 16px 0;
  background: #e0e0e0;
  border-radius: 16px 16px 0 0;
  position: relative;
}

.laptop-mockup .device-mockup {
  border-radius: 8px 8px 0 0;
}

.laptop-base {
  height: 18px;
  background: linear-gradient(to bottom, #d4d4d4, #bbb);
  border-radius: 0 0 6px 6px;
  margin: 0 -4px;
  position: relative;
}

.laptop-base::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: #aaa;
  border-radius: 0 0 4px 4px;
}

/* Hero-sized mockup */
.hero-mockup {
  max-width: 100%;
}

/* Image row mockups */
.image-row .laptop-mockup {
  padding: 10px 10px 0;
  border-radius: 12px 12px 0 0;
}

.image-row .laptop-base {
  height: 14px;
}

.image-row .device-mockup .browser-bar {
  padding: 7px 10px;
  gap: 5px;
}

.image-row .device-mockup .browser-dot {
  width: 7px;
  height: 7px;
}

.image-row .device-mockup .browser-url {
  padding: 3px 8px;
  font-size: 0.58rem;
}

/* Card-level mockup on homepage */
.card-mockup-wrap {
  background: #e8e8e8;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 2rem 2.5rem 0;
  height: 100%;
}

.card-mockup-wrap .device-mockup {
  border-radius: 8px 8px 0 0;
  box-shadow: 0 -4px 30px rgba(0,0,0,0.12);
}

.card-mockup-wrap .browser-bar {
  padding: 8px 12px;
  gap: 5px;
}

.card-mockup-wrap .browser-dot {
  width: 8px;
  height: 8px;
}

.card-mockup-wrap .browser-url {
  padding: 3px 10px;
  font-size: 0.62rem;
}

/* ===== POS Device Mockup ===== */
.pos-mockup {
  background: #1a1a1a;
  border-radius: 24px;
  padding: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2), inset 0 0 0 2px #333;
  position: relative;
}

.pos-mockup::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 5px;
  background: #333;
  border-radius: 10px;
}

.pos-mockup img {
  width: 100%;
  display: block;
  border-radius: 8px;
}

.pos-stand {
  width: 60px;
  height: 40px;
  background: linear-gradient(to bottom, #2a2a2a, #1a1a1a);
  margin: 0 auto;
  border-radius: 0 0 6px 6px;
  position: relative;
}

.pos-stand::after {
  content: '';
  display: block;
  width: 120px;
  height: 10px;
  background: linear-gradient(to bottom, #333, #222);
  border-radius: 4px;
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}

/* POS device group in image rows */
.pos-device-group {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.image-row .pos-mockup {
  padding: 10px;
  border-radius: 16px;
}

.image-row .pos-mockup::before {
  width: 40px;
  height: 3px;
  top: 5px;
}

.image-row .pos-mockup img {
  border-radius: 6px;
}

.image-row .pos-stand {
  width: 40px;
  height: 28px;
}

.image-row .pos-stand::after {
  width: 80px;
  height: 7px;
}

/* Card-level POS mockup on homepage */
.card-pos-wrap {
  background: #e8e8e8;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 2rem 3rem 1rem;
  height: 100%;
}

.card-pos-wrap .pos-mockup {
  padding: 10px;
  border-radius: 16px;
  max-width: 90%;
}

.card-pos-wrap .pos-mockup::before {
  width: 40px;
  height: 3px;
  top: 5px;
}

.card-pos-wrap .pos-mockup img {
  border-radius: 6px;
}

.card-pos-wrap .pos-stand {
  width: 40px;
  height: 24px;
}

.card-pos-wrap .pos-stand::after {
  width: 80px;
  height: 6px;
}

.project-content ul {
  padding-left: 1.25rem;
  margin-bottom: 1.25rem;
}

.project-content li {
  color: var(--muted);
  margin-bottom: 0.5rem;
  line-height: 1.75;
}

/* ===== Placeholder images ===== */
.placeholder-img {
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.ph-1 { background: linear-gradient(135deg, #FF6B35, #c23a6b); }
.ph-2 { background: linear-gradient(135deg, #c23a6b, #5b2a86); }
.ph-3 { background: linear-gradient(135deg, #1a1a2e, #5b2a86); }
.ph-4 { background: linear-gradient(135deg, #5b2a86, #FF6B35); }

/* ===== Impact Metrics Banner ===== */
.metrics-banner {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 2.5rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  background: var(--text);
  border-radius: var(--radius);
  padding: 2.5rem;
}

.metric {
  text-align: center;
}

.metric .number {
  display: block;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.metric .label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.35rem;
}

/* ===== UX Takeaways Section ===== */
.ux-takeaways {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 2.5rem;
  margin-top: 3rem;
  border: 2px solid var(--border);
}

.ux-takeaways h2 {
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 1.5rem 0;
  padding: 0;
  border: none;
  color: var(--text);
}

.takeaway-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.25rem;
}

.takeaway-list li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  color: var(--muted);
  line-height: 1.65;
  margin: 0;
}

.takeaway-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: var(--text);
  color: #fff;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

.takeaway-list li strong {
  color: var(--text);
}

/* ===== Findings Cards ===== */
.findings {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2.5rem 0;
}

.finding-card {
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2rem;
}

.finding-card h3 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 1rem;
}

.finding-card p {
  font-size: 0.92rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.finding-card p strong {
  color: var(--text);
}

/* ===== Prototype Embed ===== */
.prototype-embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16/10;
  margin: 2rem 0 2.5rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid var(--border);
  background: #f5f5f5;
}

.prototype-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .services { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero { min-height: 420px; margin-top: 68px; margin-left: 1rem; margin-right: 1rem; padding: 2.5rem; }
  .about { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-photo { max-width: 220px; }
  .project-content .image-row { grid-template-columns: 1fr; }
  .contact { flex-direction: column; text-align: center; margin-left: 1rem; margin-right: 1rem; }
  .contact .contact-right { align-items: center; }
  .section-header { flex-direction: column; align-items: flex-start; }
  .section-header p { text-align: left; }
  .services { grid-template-columns: 1fr; }
  nav .nav-links { gap: 1.5rem; }
}

@media (max-width: 480px) {
  .hero { min-height: 360px; padding: 2rem 1.5rem; }
  .hero h1 { font-size: 2.4rem; }
  nav .nav-inner { padding: 0 1.5rem; }
  .project-hero .meta { flex-direction: column; gap: 1rem; }
}