@import url("https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700&family=DM+Mono:wght@400;500&display=swap");

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

:root {
  --primary: #f7941d;
  --primary-dark: #c36b00;
  --secondary: #00a3cc;
  --accent: #28b8cc;
  --dark: #0d0f14;
  --dark-light: #1a1d26;
  --white: #ffffff;
  --gray-50: #f8f9fb;
  --gray-100: #f0f2f7;
  --gray-200: #e2e6f0;
  --gray-300: #c8cfe0;
  --gray-400: #8e9ab5;
  --gray-500: #6171a0;
  --gray-600: #3e4d78;
  --gray-700: #2b3660;
  --gray-800: #1a2248;
  --gray-900: #111529;
  --radius: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --transition: all 0.25s cubic-bezier(0.25, 0.1, 0.25, 1.0);
}

html { scroll-behavior: smooth; }

body {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-900);
  background-color: var(--gray-50);
  overflow-x: hidden;
  margin: 0;
  width: 100%;
}

code {
  font-family: "DM Mono", monospace;
  font-size: 0.85em;
  background: var(--gray-100);
  color: var(--gray-700);
  padding: 0.15em 0.45em;
  border-radius: 4px;
  border: 1px solid var(--gray-200);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  box-sizing: border-box;
}

/* ── Header ── */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
  padding: 1.25rem 0;
  box-shadow: 0 1px 0 rgba(255,255,255,0.06), 0 4px 24px rgba(0,0,0,0.25);
}

.header-content {
  text-align: center;
  margin-bottom: 1.25rem;
}

.logo-text {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
}

.text-accent { color: var(--primary); }

.nav-tabs { display: flex; justify-content: center; }

.tabs-list {
  display: inline-flex;
  background-color: rgba(255,255,255,0.07);
  border-radius: 9999px;
  border: 1px solid rgba(255,255,255,0.12);
  padding: 4px;
  gap: 4px;
}

.tab-button {
  padding: 0.5rem 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 9999px;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.825rem;
  transition: var(--transition);
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.01em;
}

.tab-button:hover { color: var(--white); background: rgba(255,255,255,0.08); }

.tab-button.active {
  background-color: var(--primary);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(247,148,29,0.35);
}

/* ── Main Content ── */
.main-content { padding: 4rem 0 5rem; }

.tab-content { display: none; opacity: 0; transition: var(--transition); }
.tab-content.active { display: block; opacity: 1; }

/* ── Section Header ── */
.section-header {
  max-width: 640px;
  margin: 0 auto 3.5rem;
  text-align: center;
}

.badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  background-color: rgba(247,148,29,0.12);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 1.75rem;
  color: var(--dark);
  margin-bottom: 0.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.title-line {
  height: 2px;
  width: 3rem;
  background: linear-gradient(to right, var(--primary), var(--accent));
  margin: 1rem auto 1.5rem;
  border-radius: 2px;
}

.section-description {
  font-size: 1rem;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ── Services Grid ── */
.services-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.service-card {
  background-color: var(--white);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
  transition: var(--transition);
  border: 1px solid var(--gray-200);
}

.service-card:hover {
  box-shadow: 0 2px 8px rgba(0,0,0,0.08), 0 12px 32px rgba(0,0,0,0.07);
  transform: translateY(-1px);
}

/* Card header row */
.card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.service-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.icon-orange { background: rgba(247,148,29,0.1); color: var(--primary); }
.icon-blue   { background: rgba(0,163,204,0.1);  color: var(--secondary); }
.icon-teal   { background: rgba(40,184,204,0.1); color: var(--accent); }

.service-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.3;
}

.service-description {
  color: var(--gray-500);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 0;
}

/* ── File Structure ── */
.file-structure {
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin: 1.5rem 0;
  border: 1px solid var(--gray-200);
}

.file-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.875rem;
}

.file-item:hover {
  background-color: var(--gray-100);
  color: var(--primary);
  transform: translateX(4px);
}

.file-icon-fa {
  font-size: 0.9rem;
  width: 1rem;
  text-align: center;
  color: var(--gray-400);
  transition: var(--transition);
}

.file-icon-fa.folder-root { color: var(--primary); }
.file-icon-fa.file-doc    { color: var(--secondary); }
.file-icon-fa.file-img    { color: #e67e22; }

.file-item:hover .file-icon-fa { color: var(--primary); }

.file-name { font-weight: 500; font-family: "DM Mono", monospace; font-size: 0.825rem; }

.file-children {
  margin-left: 1.5rem;
  border-left: 2px solid var(--gray-200);
  padding-left: 0.75rem;
  margin-top: 0.25rem;
}

.alert-warning {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background-color: rgba(247,148,29,0.07);
  border: 1px solid rgba(247,148,29,0.25);
  border-left: 3px solid var(--primary);
  color: var(--primary-dark);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-top: 1.5rem;
  font-size: 0.875rem;
  line-height: 1.6;
}

.alert-warning i { margin-top: 2px; flex-shrink: 0; color: var(--primary); }

/* ── Accessibility Features ── */
.accessibility-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.75rem;
}

.feature-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--gray-300);
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.feature-card.contrast-checker {
  grid-column: 1 / -1;
  flex-direction: column;
  align-items: stretch;
}

.feature-card.contrast-checker > .feature-icon-wrap {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.feature-card.test-required {
  grid-column: 1 / -1;
  background: rgba(0,163,204,0.04);
  border-color: rgba(0,163,204,0.25);
}

.feature-icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  min-width: 2.25rem;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--gray-200);
  color: var(--secondary);
  font-size: 0.9rem;
}

.contrast-checker-body { flex: 1; }

.feature-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.35rem;
}

.feature-description {
  font-size: 0.8375rem;
  color: var(--gray-500);
  line-height: 1.65;
}

/* ── Contrast Tool ── */
.contrast-tool {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1.25rem;
  margin-top: 1rem;
  align-items: center;
}

.color-inputs { display: flex; flex-direction: column; gap: 0.75rem; }

.input-group { display: flex; flex-direction: column; gap: 0.35rem; }

.input-group label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-group input[type="color"] {
  width: 100%;
  height: 2.5rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 2px;
}

.contrast-preview {
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--gray-300);
  background: #ffffff;
  color: #111529;
}

#previewText { font-size: 1rem; font-weight: 600; margin-bottom: 0.75rem; }
.contrast-info { font-size: 0.8rem; margin-bottom: 0.35rem; color: inherit; opacity: 0.7; }
#contrastRatio { font-weight: 700; opacity: 1; }
.contrast-pass { color: #059669; font-weight: 700; font-size: 0.875rem; }
.contrast-fail { color: #dc2626; font-weight: 700; font-size: 0.875rem; }

/* ── Links Grid ── */
.links-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.links-group {
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  border: 1px solid var(--gray-200);
}

.links-group-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--gray-200);
}

.links-group-header i {
  color: var(--secondary);
  font-size: 0.875rem;
}

.links-group-header h4 {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag-required {
  font-size: 0.65rem;
  font-weight: 700;
  background: rgba(247,148,29,0.12);
  color: var(--primary);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.links-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.8375rem;
  color: var(--gray-600);
  line-height: 1.55;
}

.links-list li > i {
  color: var(--primary);
  font-size: 0.6rem;
  margin-top: 5px;
  flex-shrink: 0;
}

.links-list li strong { color: var(--gray-800); }

.sub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.4rem;
}

.sub-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--secondary);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  background: rgba(0,163,204,0.08);
  border-radius: 9999px;
  border: 1px solid rgba(0,163,204,0.2);
  transition: var(--transition);
}

.sub-links a:hover {
  background: var(--secondary);
  color: var(--white);
  border-color: var(--secondary);
}

.sub-links a i { font-size: 0.7rem; }

/* ── Timeline ── */
.timeline-container {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding-left: 2.5rem;
}

.timeline-line {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--gray-300));
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
  cursor: pointer;
  transition: var(--transition);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--white);
  border: 3px solid var(--secondary);
  transition: var(--transition);
}

.timeline-item:hover::before {
  background-color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-50%) scale(1.15);
}

.timeline-content {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.timeline-item:hover .timeline-content {
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  border-color: var(--gray-300);
}

.timeline-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.timeline-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius);
  background: rgba(0,163,204,0.1);
  color: var(--secondary);
  font-size: 1rem;
  transition: var(--transition);
}

.timeline-item:hover .timeline-icon {
  background: var(--secondary);
  color: var(--white);
}

.timeline-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  transition: var(--transition);
}

.timeline-item:hover .timeline-title { color: var(--primary); }

/* ── Modal ── */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
}

.modal.active { opacity: 1; visibility: visible; }

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0);
  backdrop-filter: blur(0px);
  transition: background 0.35s ease, backdrop-filter 0.45s ease;
}

.modal.active .modal-backdrop {
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(6px);
}

.modal-content {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
  width: 100%;
  max-width: 480px;
  transform: scale(0.96) translateY(8px);
  transition: transform 0.3s cubic-bezier(0.34, 1.2, 0.64, 1);
}

.modal.active .modal-content {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--gray-100);
  border: none;
  color: var(--gray-500);
  cursor: pointer;
  transition: var(--transition);
  padding: 0.45rem 0.55rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  line-height: 1;
}

.modal-close:hover { background: var(--gray-200); color: var(--dark); }

.modal-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.75rem;
  padding-right: 2.5rem;
}

.modal-description { color: var(--gray-500); font-size: 0.9375rem; margin-bottom: 1rem; }

.modal-details {
  border-top: 1px solid var(--gray-200);
  padding-top: 1rem;
  margin-top: 1rem;
}

.modal-details h5 { font-weight: 600; color: var(--dark); margin-bottom: 0.5rem; }
.modal-details p { color: var(--gray-500); margin-bottom: 1rem; font-size: 0.9rem; }
.modal-details .alert-warning { margin-top: 1rem; margin-bottom: 0; }

/* ── Footer ── */
.footer {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
  padding: 2.5rem 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  text-align: center;
}

.footer-credit {
  color: rgba(255,255,255,0.3);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-name {
  color: var(--white);
  font-size: 1rem;
  font-weight: 700;
}

.footer-role {
  color: rgba(255,255,255,0.45);
  font-size: 0.8125rem;
}

.footer-linkedin {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.85rem;
  padding: 0.5rem 1.25rem;
  background: rgba(0,163,204,0.12);
  border: 1px solid rgba(0,163,204,0.3);
  border-radius: 9999px;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.825rem;
  font-weight: 600;
  transition: var(--transition);
}

.footer-linkedin:hover {
  background: var(--secondary);
  border-color: var(--secondary);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,163,204,0.3);
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .links-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .tabs-list { flex-direction: column; gap: 4px; padding: 4px; }
  .tab-button { padding: 0.75rem 1.25rem; }

  .section-title { font-size: 1.4rem; }

  .accessibility-features { grid-template-columns: 1fr; }
  .feature-card.contrast-checker,
  .feature-card.test-required { grid-column: 1; }

  .contrast-tool { grid-template-columns: 1fr; }

  .timeline-container { padding-left: 1.5rem; }
  .timeline-item::before { left: -24px; width: 12px; height: 12px; }
}

@media (min-width: 641px) and (max-width: 900px) {
  .accessibility-features { grid-template-columns: repeat(2, 1fr); }
}