/* ============================================
   DESIGN SYSTEM
   ============================================ */

:root {
  --color-primary: #03363D;
  --color-accent: #8ACA2B;
  --color-accent-dark: #6aab12;
  --color-accent-text: #4a8400; /* Accessible accent for text on light backgrounds — 4.59:1 on white */
  --color-bg: #FFFFFF;
  --color-bg-light: #F7F9F7;
  --color-text: #1A1A1A;
  --color-text-muted: #6B7280;
  --color-border: #E5E7EB;

  --font: 'DM Sans', sans-serif;

  --max-width: 1160px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(3, 54, 61, 0.08);
  --shadow-hover: 0 8px 40px rgba(3, 54, 61, 0.14);

  --transition: 0.25s ease;
}

/* ============================================
   RESET & BASE
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.2;
}

h1 { font-size: clamp(2.4rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

/* ============================================
   LAYOUT
   ============================================ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 100px 0;
}

/* ============================================
   NAVIGATION
   ============================================ */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.2rem 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

nav.scrolled {
  border-color: var(--color-border);
  box-shadow: 0 2px 16px rgba(3,54,61,0.06);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

.nav-cta {
  background: var(--color-accent) !important;
  color: var(--color-primary) !important;
  padding: 0.55rem 1.3rem;
  border-radius: 50px;
  font-weight: 600 !important;
  transition: background var(--transition), transform var(--transition) !important;
}

.nav-cta:hover {
  background: var(--color-accent-dark) !important;
  transform: translateY(-1px);
}

/* ============================================
   HERO
   ============================================ */

#hero {
  background: var(--color-primary);
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(138,202,43,0.12) 0%, transparent 70%);
  pointer-events: none;
}

#hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(138,202,43,0.07) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent-text);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-label::before {
  content: '';
  width: 28px;
  height: 2px;
  background: var(--color-accent);
}

.hero-content h1 {
  color: #ffffff;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-content h1 em {
  font-style: normal;
  color: var(--color-accent);
}

.hero-content p {
  color: rgba(255,255,255,0.65);
  font-size: 1.15rem;
  max-width: 480px;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-accent);
  color: var(--color-primary);
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.85rem 2rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(138,202,43,0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: rgba(255,255,255,0.8);
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 500;
  padding: 0.85rem 2rem;
  border-radius: 50px;
  border: 1.5px solid rgba(255,255,255,0.25);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-secondary:hover {
  border-color: rgba(255,255,255,0.6);
  color: #ffffff;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(10px);
  width: 100%;
  max-width: 380px;
}

.hero-card-tag {
  display: inline-block;
  background: rgba(138,202,43,0.15);
  color: var(--color-accent);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: 50px;
  margin-bottom: 1.2rem;
}

.hero-card h3 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.hero-card p {
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.hero-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-pill {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.7);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  border: 1px solid rgba(255,255,255,0.1);
}

/* ============================================
   ABOUT
   ============================================ */

#about {
  background: var(--color-bg);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 5rem;
  align-items: center;
}

.about-photo-wrap {
  position: relative;
}

.about-photo {
  width: 100%;
  aspect-ratio: 4/5;
  border-radius: 20px;
  background: var(--color-bg-light);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
}

.about-photo-placeholder {
  font-size: 4rem;
  color: var(--color-border);
}

.about-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--color-primary);
  color: white;
  padding: 1.2rem 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.about-badge-number {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.about-badge-text {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.7);
  margin-top: 0.2rem;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent-text);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.about-text h2 {
  color: var(--color-primary);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.about-text p {
  margin-bottom: 1rem;
}

.tools-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 2rem;
}

.tool-tag {
  background: var(--color-bg-light);
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.45rem 1rem;
  border-radius: 50px;
  border: 1.5px solid var(--color-border);
  transition: all var(--transition);
}

.tool-tag:hover {
  border-color: var(--color-accent);
  background: rgba(138,202,43,0.07);
}

/* ============================================
   PORTFOLIO
   ============================================ */

#portfolio {
  background: var(--color-bg-light);
}

.section-header {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 4rem;
}

.section-header h2 {
  color: var(--color-primary);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.project-card {
  background: var(--color-bg);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.project-thumb {
  width: 100%;
  aspect-ratio: 16/10;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.project-thumb-1 { background: #ffffff; }
.project-thumb-2 { background: #ffffff; }
.project-thumb-3 { background: linear-gradient(135deg, #2d4a22 0%, #3d6b2f 100%); }

.project-thumb-icon {
  font-size: 3rem;
  opacity: 0.4;
}

.project-body {
  padding: 1.5rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.project-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 50px;
}

.tag-ui { background: #EEF2FF; color: #4F46E5; }
.tag-mobile { background: #FFF7ED; color: #C2410C; }
.tag-research { background: #F0FDF4; color: #15803D; }
.tag-testing { background: #FFF1F2; color: #BE123C; }
.tag-responsive { background: #F0F9FF; color: #0369A1; }
.tag-a11y { background: #FEFCE8; color: #A16207; }
.tag-desktop { background: #FAF5FF; color: #7E22CE; }
.tag-ai { background: #F0FDF4; color: #065F46; }

.project-body h3 {
  color: var(--color-primary);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.project-body p {
  font-size: 0.9rem;
  margin-bottom: 1.2rem;
  line-height: 1.6;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition), color var(--transition);
}

.project-link:hover {
  gap: 0.7rem;
  color: var(--color-accent-text);
}

/* ============================================
   CONTACT
   ============================================ */

#contact {
  background: var(--color-primary);
  text-align: center;
}

#contact .section-label {
  color: rgba(138,202,43,0.8);
}

#contact h2 {
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

#contact > .container > p {
  color: rgba(255,255,255,0.6);
  max-width: 480px;
  margin: 0 auto 3rem;
  font-size: 1.05rem;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.8rem;
  border-radius: 50px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.contact-btn-primary {
  background: var(--color-accent);
  color: var(--color-primary);
  border: none;
}

.contact-btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(138,202,43,0.3);
}

.contact-btn-secondary {
  background: transparent;
  color: rgba(255,255,255,0.8);
  border: 1.5px solid rgba(255,255,255,0.25);
}

.contact-btn-secondary:hover {
  border-color: rgba(255,255,255,0.6);
  color: #ffffff;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background: #021f24;
  padding: 2rem 0;
  text-align: center;
}

footer p {
  color: rgba(255,255,255,0.3);
  font-size: 0.85rem;
}

/* ============================================
   CASE STUDY PAGES
   ============================================ */

.case-hero {
  background: var(--color-primary);
  padding: 140px 0 80px;
}

.case-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 2rem;
  transition: color var(--transition);
}

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

.case-hero h1 {
  color: #ffffff;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.case-hero p {
  color: rgba(255,255,255,0.6);
  font-size: 1.1rem;
  max-width: 600px;
  margin-bottom: 2rem;
}

.case-meta {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.case-meta-item label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 0.3rem;
}

.case-meta-item span {
  color: rgba(255,255,255,0.8);
  font-size: 0.95rem;
}

.case-cover {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  margin-top: -2rem;
}

.case-cover-img {
  width: 100%;
  aspect-ratio: 16/7;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  overflow: hidden;
  object-fit: cover;
}

.case-content {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 2rem;
}

.case-section {
  padding: 60px 0;
  border-bottom: 1px solid var(--color-border);
}

.case-section:last-child {
  border-bottom: none;
}

.case-section h2 {
  color: var(--color-primary);
  font-size: 1.6rem;
  margin-bottom: 1.2rem;
  letter-spacing: -0.01em;
}

.case-section p {
  margin-bottom: 1rem;
}

.case-section ul {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

.case-section ul li {
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

.case-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius);
  border: 2px dashed var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: 2rem 0;
  background: var(--color-bg-light);
}

.case-placeholder span {
  font-size: 2rem;
}

.case-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 3rem 0;
  border-top: 1px solid var(--color-border);
  margin-top: 2rem;
}

.case-nav a {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.case-nav a:last-child {
  text-align: right;
}

.case-nav-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-text);
}

.case-nav-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: color var(--transition);
}

.case-nav a:hover .case-nav-title {
  color: var(--color-accent-text);
}

/* ============================================
   LANGUAGE SWITCHER
   ============================================ */

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  margin-left: 1.5rem;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  padding: 0.2rem 0.3rem;
}

.lang-btn {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  padding: 0.25rem 0.6rem;
  border-radius: 50px;
  letter-spacing: 0.06em;
  transition: all var(--transition);
}

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

.lang-btn.lang-active {
  background: var(--color-primary);
  color: white;
}

/* ── Mobile burger menu ── */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
}
.nav-burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================
   CASE STUDY — RICH CONTENT
   ============================================ */

.case-insight {
  background: var(--color-bg-light);
  border-left: 3px solid var(--color-accent);
  padding: 1rem 1.2rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1rem 0;
}

.case-insight p {
  color: var(--color-primary);
  font-weight: 500;
  font-size: 0.95rem;
  margin: 0;
}

.case-quote {
  background: var(--color-bg-light);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.2rem 0;
  position: relative;
}

.case-quote::before {
  content: '"';
  font-size: 4rem;
  color: var(--color-accent-text);
  line-height: 1;
  position: absolute;
  top: -0.5rem;
  left: 1rem;
  font-family: Georgia, serif;
  opacity: 0.4;
}

.case-quote blockquote {
  font-style: italic;
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0 0 0.5rem;
  padding-top: 0.5rem;
}

.case-quote cite {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  font-style: normal;
  font-weight: 600;
}

.case-quote-insight {
  font-size: 0.85rem;
  color: var(--color-accent-text);
  font-weight: 600;
  margin-top: 0.5rem;
  display: block;
}

.case-img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  margin: 1.5rem 0;
}

.case-img-caption {
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-top: -0.8rem;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.case-img-placeholder {
  width: 100%;
  border-radius: var(--radius);
  border: 2px dashed var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin: 1.5rem 0;
  background: var(--color-bg-light);
  padding: 2.5rem;
  text-align: center;
}

.case-img-placeholder .img-name {
  font-size: 0.75rem;
  font-family: monospace;
  background: var(--color-border);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  color: var(--color-primary);
}

.miro-embed-wrap {
  margin: 1.5rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-light);
}

.miro-embed-wrap iframe {
  width: 100%;
  height: 480px;
  border: none;
  display: block;
}

.miro-fallback {
  padding: 1rem 0 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.miro-fallback a {
  color: var(--color-accent-text);
  font-weight: 600;
  text-decoration: underline;
}

.case-table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
}

.case-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.case-table th {
  background: var(--color-primary);
  color: white;
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.82rem;
}

.case-table td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  vertical-align: top;
}

.case-table tr:nth-child(even) td {
  background: var(--color-bg-light);
}

.case-steps {
  counter-reset: steps;
  padding: 0;
  list-style: none;
  margin: 1.2rem 0;
}

.case-steps li {
  counter-increment: steps;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.case-steps li::before {
  content: counter(steps);
  min-width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: white;
  font-weight: 700;
  font-size: 0.8rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.case-cta-box {
  background: var(--color-primary);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  margin: 2rem 0;
}

.case-cta-box h3 {
  color: white;
  margin-bottom: 0.5rem;
}

.case-cta-box p {
  color: rgba(255,255,255,0.65);
  margin-bottom: 1.5rem;
}

.a11y-note {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--color-accent-text);
  font-weight: 600;
  margin: 0.8rem 0;
  background: rgba(138,202,43,0.08);
  padding: 0.5rem 0.8rem;
  border-radius: var(--radius-sm);
}

.tag-flow {
  background: #F0FDFF;
  color: #0369A1;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 50px;
}

.flow-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.7rem 1.4rem;
  border-radius: 50px;
  margin: 1rem 0;
  transition: all var(--transition);
}

.flow-link-btn:hover {
  background: var(--color-accent-dark);
  transform: translateY(-1px);
}

.persona-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.persona-card {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  text-align: center;
}

.persona-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

.persona-card-img-placeholder {
  width: 100%;
  aspect-ratio: 1;
  background: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.persona-card-body {
  padding: 0.8rem;
}

.persona-card-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent-text);
  margin-bottom: 0.3rem;
}

.persona-card-body p {
  font-size: 0.82rem;
  line-height: 1.5;
}

@media (max-width: 640px) {
  .persona-grid { grid-template-columns: 1fr; }
  .miro-embed-wrap iframe { height: 320px; }
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .about-inner { grid-template-columns: 1fr; }
  .about-photo-wrap { max-width: 320px; margin: 0 auto; }
  .projects-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
}

@media (max-width: 640px) {
  section { padding: 70px 0; }
  .nav-burger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 1.25rem 1rem;
    gap: 0;
  }
  .nav-links.is-open { display: flex; }
  .nav-links li { border-bottom: 1px solid var(--color-border); }
  .nav-links li:last-child { border-bottom: none; }
  .nav-links a { display: block; padding: 0.75rem 0; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-secondary { text-align: center; justify-content: center; }
  .case-meta { gap: 1.5rem; }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  font-size: 0.9rem;
  z-index: 9999;
  border-radius: 0 0 var(--radius-sm) 0;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 0;
}

/* Focus indicator — WCAG 2.4.7 */
:focus-visible {
  outline: 3px solid #4a8400;
  outline-offset: 3px;
  border-radius: 4px;
}

/* Details/summary state indicator — WCAG 4.1.2 */
details summary::before {
  content: '▶ ';
  font-style: normal;
}
details[open] summary::before {
  content: '▼ ';
}

/* Reduced motion — WCAG 2.3.3 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
  .fade-in {
    opacity: 1 !important;
    transform: none !important;
  }
}