:root {
  --blue-900: #0c3d5c;
  --blue-700: #1a6b9a;
  --blue-500: #2d9cdb;
  --blue-100: #e8f4fc;
  --green-700: #1e7a4a;
  --green-500: #34c77b;
  --green-100: #e6f9ef;
  --neutral-900: #1a2332;
  --neutral-700: #4a5568;
  --neutral-500: #718096;
  --neutral-200: #e2e8f0;
  --neutral-100: #f7fafc;
  --white: #ffffff;
  --shadow: 0 4px 24px rgba(12, 61, 92, 0.1);
  --radius: 12px;
  --font-body: "Nunito", system-ui, sans-serif;
  --font-display: "Outfit", system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--neutral-900);
  background: var(--white);
  line-height: 1.6;
  font-size: 1rem;
}

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

a { color: var(--blue-700); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--green-700); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--blue-900);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }

.container {
  width: min(1140px, 92%);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--neutral-200);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--blue-900);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--blue-500), var(--green-500));
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: white;
  font-size: 1.1rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: 2px solid var(--blue-700);
  border-radius: 8px;
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  color: var(--blue-900);
  font-size: 1.25rem;
}

.main-nav ul {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.main-nav a {
  color: var(--neutral-700);
  font-weight: 600;
  font-size: 0.95rem;
}

.main-nav a:hover,
.main-nav a.active { color: var(--blue-700); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-weight: 700;
  font-family: var(--font-display);
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: linear-gradient(135deg, var(--blue-700), var(--green-500));
  color: white;
  box-shadow: 0 4px 16px rgba(45, 156, 219, 0.35);
}

.btn-primary:hover { color: white; box-shadow: 0 6px 24px rgba(45, 156, 219, 0.45); }

.btn-outline {
  background: transparent;
  border-color: var(--blue-700);
  color: var(--blue-700);
}

.btn-outline:hover { background: var(--blue-100); color: var(--blue-900); }

/* Hero */
.hero {
  padding: 4rem 0 5rem;
  background: linear-gradient(160deg, var(--blue-100) 0%, var(--green-100) 100%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-tagline {
  font-size: 1.15rem;
  color: var(--neutral-700);
  margin: 1.25rem 0 2rem;
  max-width: 520px;
}

.hero-image {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  aspect-ratio: 16/10;
  object-fit: cover;
}

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

/* Sections */
section { padding: 4.5rem 0; }

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.section-header p { color: var(--neutral-700); margin-top: 0.75rem; }

.section-alt { background: var(--neutral-100); }

/* Cards grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--neutral-200);
  transition: transform 0.2s;
}

.card:hover { transform: translateY(-4px); }

.card-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  margin-bottom: 1.25rem;
  object-fit: cover;
}

.card-icon-emoji {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  margin-bottom: 1.25rem;
  display: grid;
  place-items: center;
  font-size: 2rem;
  background: var(--blue-100);
}

/* Feature row */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.feature-row.reverse .feature-image { order: -1; }

.feature-image {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.feature-list {
  list-style: none;
  margin-top: 1.25rem;
}

.feature-list li {
  padding: 0.5rem 0 0.5rem 1.75rem;
  position: relative;
  color: var(--neutral-700);
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green-500);
  font-weight: 700;
}

/* Portfolio */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.app-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--neutral-200);
}

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

.app-card-body { padding: 1.5rem; }

.app-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-android { background: var(--green-100); color: var(--green-700); }
.badge-puzzle { background: var(--blue-100); color: var(--blue-700); }
.badge-edu { background: #fef3c7; color: #92400e; }
.badge-status { background: var(--neutral-200); color: var(--neutral-700); }

/* Filter */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  border: 2px solid var(--neutral-200);
  background: var(--white);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn.active,
.filter-btn:hover {
  border-color: var(--blue-700);
  background: var(--blue-100);
  color: var(--blue-900);
}

/* FAQ */
.faq-list { max-width: 760px; margin: 0 auto; }

.faq-item {
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
  background: var(--white);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--blue-900);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--blue-500);
  transition: transform 0.2s;
}

.faq-item.open .faq-question::after { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 1.5rem 1.25rem;
  color: var(--neutral-700);
}

.faq-item.open .faq-answer { max-height: 500px; }

.faq-group-title {
  font-family: var(--font-display);
  color: var(--green-700);
  margin: 2rem 0 1rem;
  font-size: 1.1rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--neutral-700);
  font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--neutral-200);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue-500);
}

.form-group textarea { min-height: 140px; resize: vertical; }

.contact-info-card {
  background: linear-gradient(160deg, var(--blue-900), var(--blue-700));
  color: white;
  padding: 2rem;
  border-radius: var(--radius);
}

.contact-info-card h3 { color: white; margin-bottom: 1.5rem; }

.contact-info-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.25rem;
  align-items: flex-start;
}

.contact-info-item a { color: var(--green-500); }
.contact-info-item a:hover { color: white; }

.map-embed {
  margin-top: 2rem;
  border-radius: var(--radius);
  overflow: hidden;
  height: 280px;
  border: none;
  width: 100%;
}

/* Legal pages */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 0 5rem;
}

.legal-content h2 {
  margin-top: 2rem;
  font-size: 1.35rem;
}

.legal-content p,
.legal-content li {
  color: var(--neutral-700);
  margin: 0.75rem 0;
}

.legal-content ul { padding-left: 1.5rem; }

.page-hero {
  background: linear-gradient(160deg, var(--blue-900), var(--blue-700));
  color: white;
  padding: 3rem 0;
  text-align: center;
}

.page-hero h1 { color: white; }
.page-hero p { color: rgba(255,255,255,0.85); margin-top: 0.75rem; }

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.team-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-500), var(--green-500));
  margin: 0 auto 1rem;
  display: grid;
  place-items: center;
  font-size: 2rem;
}

.team-role { color: var(--blue-700); font-weight: 600; font-size: 0.9rem; }

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--neutral-200);
}

.stat-number {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 800;
  color: var(--blue-700);
  line-height: 1.1;
}

.stat-label {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--neutral-700);
}

/* Process steps */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.process-step {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--neutral-200);
}

.process-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-700), var(--green-500));
  color: white;
  font-family: var(--font-display);
  font-weight: 800;
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
}

/* Values */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.value-item {
  text-align: center;
  padding: 1.5rem;
}

.value-icon { font-size: 2.5rem; margin-bottom: 0.75rem; }

/* Footer */
.site-footer {
  background: var(--blue-900);
  color: rgba(255, 255, 255, 0.85);
  padding: 3.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.site-footer h4 {
  color: white;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.site-footer a { color: rgba(255, 255, 255, 0.75); }
.site-footer a:hover { color: var(--green-500); }

.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 0.5rem; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.85rem;
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--white);
  box-shadow: 0 -4px 24px rgba(0,0,0,0.15);
  padding: 1.25rem;
  z-index: 1000;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

.cookie-banner.visible { transform: translateY(0); }

.cookie-inner {
  max-width: 1140px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}

.cookie-text { flex: 1; min-width: 260px; font-size: 0.9rem; color: var(--neutral-700); }

.cookie-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.cookie-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1001;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.cookie-modal.visible { display: flex; }

.cookie-modal-content {
  background: white;
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 520px;
  width: 100%;
}

.cookie-option {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--neutral-200);
}

.cookie-option label { font-weight: 600; }

.form-success {
  background: var(--green-100);
  color: var(--green-700);
  padding: 1rem;
  border-radius: 8px;
  display: none;
}

.form-success.visible { display: block; }

.hidden { display: none !important; }

/* Responsive */
@media (max-width: 900px) {
  .hero-grid,
  .feature-row,
  .contact-grid,
  .footer-grid { grid-template-columns: 1fr; }

  .feature-row.reverse .feature-image { order: 0; }

  .nav-toggle { display: block; }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--neutral-200);
    padding: 1rem;
  }

  .main-nav.open { display: block; }

  .main-nav ul { flex-direction: column; gap: 0.75rem; }
}

@media (max-width: 600px) {
  section { padding: 3rem 0; }
  .hero { padding: 2.5rem 0 3rem; }
}

/* ── Form validation & error states ──────────────────────── */
.field-error {
  display: block;
  font-size: 0.8rem;
  color: #dc2626;
  margin-top: 0.3rem;
  min-height: 1.1rem;
}

.form-group input.input-error,
.form-group select.input-error,
.form-group textarea.input-error {
  border-color: #dc2626;
  background: #fff5f5;
}

.form-error {
  display: none;
  background: #fff5f5;
  border: 1px solid #fca5a5;
  color: #991b1b;
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}
.form-error.visible { display: block; }
.form-error a { color: #991b1b; font-weight: 600; }

.form-success {
  display: none;
  background: var(--green-100);
  border: 1px solid var(--green-500);
  color: var(--green-700);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
  font-weight: 600;
}
.form-success.visible { display: block; }

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── Portfolio filter fade animation ─────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.app-card {
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.app-card.fade-in {
  animation: fadeInUp 0.35s ease forwards;
}

.app-card.hidden {
  display: none !important;
}

/* ── Portfolio grid spacing tweak ────────────────────────── */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.badge-dev { background: #fef3c7; color: #92400e; }