/* ========== RESET ========== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
ol,
figure,
dl,
dd {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

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

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

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

[id] {
  scroll-margin-top: 80px;
}

::selection {
  background: var(--color-accent);
  color: #fff;
}

/* ========== TOKENS ========== */
:root {
  --color-primary: #0A1F44;
  --color-primary-dark: #06122B;
  --color-primary-light: #16306B;
  --color-bg: #F7F2E9;
  --color-accent: #FF6B35;
  --color-accent-dark: #E85520;
  --color-support: #00C2A8;
  --color-support-dark: #009D89;
  --color-text: #1E2A38;
  --color-text-secondary: #5A6B7C;
  --color-border: #E3E8ED;
  --color-surface: #FFFFFF;

  --font-heading: "Archivo Black", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-numeric: "JetBrains Mono", "Roboto Mono", monospace;

  --header-width: 250px;
  --header-width-tablet: 210px;
  --mobile-header-height: 60px;

  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;

  --container-max: 1200px;
  --container-pad: 1.5rem;

  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --duration-fast: 160ms;
}

/* ========== BASE ========== */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  line-height: 1.25;
  color: var(--color-primary);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
}

h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ========== LAYOUT ========== */
#main-content {
  margin-left: var(--header-width);
  min-height: 70vh;
  position: relative;
}

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.content-wrap {
  max-width: 880px;
  margin-inline: auto;
  padding: var(--space-8) var(--container-pad) var(--space-10);
}

/* ========== SKIP LINK ========== */
.skip-link {
  position: fixed;
  top: -100px;
  left: 0;
  z-index: 3000;
  padding: 0.75rem 1.5rem;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 0 0 var(--radius-pill) 0;
  transition: top var(--duration-fast) var(--ease);
}

.skip-link:focus {
  top: 0;
}

/* ========== HEADER ========== */
.site-header {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--header-width);
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-bg);
  display: flex;
  flex-direction: column;
  padding: clamp(1.25rem, 3vh, 2rem) clamp(1rem, 2vw, 1.5rem);
  z-index: 100;
  overflow-y: auto;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 55%, var(--color-support) 55%, var(--color-support) 100%);
  z-index: 10;
}

.header-inner {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

/* Brand */
.brand-block {
  padding-bottom: var(--space-5);
  border-bottom: 1px solid rgba(247, 242, 233, 0.12);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-bg);
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.brand-name em {
  font-style: normal;
  color: var(--color-accent);
}

.brand-version {
  font-family: var(--font-numeric);
  font-size: 0.68rem;
  font-weight: 700;
  background: rgba(255, 107, 53, 0.14);
  color: var(--color-accent);
  padding: 0.1rem 0.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 107, 53, 0.35);
  line-height: 1.4;
  white-space: nowrap;
}

.brand-meta {
  margin-top: var(--space-3);
  font-family: var(--font-numeric);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: rgba(247, 242, 233, 0.55);
  line-height: 1.4;
}

/* Navigation */
.site-nav {
  margin-top: var(--space-5);
  flex: 1;
}

.nav-title {
  font-family: var(--font-numeric);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(247, 242, 233, 0.35);
  margin-bottom: var(--space-4);
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  color: rgba(247, 242, 233, 0.72);
  font-weight: 500;
  font-size: 0.93rem;
  border-left: 3px solid transparent;
  transition: background-color var(--duration-fast) var(--ease),
    color var(--duration-fast) var(--ease),
    border-color var(--duration-fast) var(--ease);
}

.nav-index {
  font-family: var(--font-numeric);
  font-size: 0.68rem;
  color: rgba(255, 107, 53, 0.65);
  min-width: 1.5rem;
  transition: color var(--duration-fast) var(--ease);
}

.nav-label {
  white-space: nowrap;
}

.nav-link:hover {
  background: rgba(255, 107, 53, 0.1);
  color: #fff;
}

.nav-link:hover .nav-index {
  color: var(--color-accent);
}

.nav-link[aria-current="page"] {
  background: rgba(255, 107, 53, 0.15);
  color: #fff;
  border-left-color: var(--color-accent);
}

.nav-link[aria-current="page"] .nav-index {
  color: var(--color-accent);
}

.nav-link:active {
  background: rgba(255, 107, 53, 0.22);
}

/* Header status */
.header-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: var(--space-4) 0 var(--space-2);
  margin-top: auto;
  border-top: 1px solid rgba(247, 242, 233, 0.1);
  font-family: var(--font-numeric);
  font-size: 0.72rem;
  color: rgba(247, 242, 233, 0.6);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-support);
  box-shadow: 0 0 0 3px rgba(0, 194, 168, 0.18);
  flex-shrink: 0;
}

.status-text {
  white-space: nowrap;
}

/* Nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--color-bg);
  font-size: 0.72rem;
  flex-shrink: 0;
  z-index: 1101;
  transition: background var(--duration-fast) var(--ease);
}

.nav-toggle:hover {
  background: rgba(255, 107, 53, 0.2);
  border-color: rgba(255, 107, 53, 0.4);
}

.toggle-icon {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--duration-fast) var(--ease), opacity var(--duration-fast) var(--ease);
}

.toggle-text {
  font-family: var(--font-numeric);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
}

/* ========== FOOTER ========== */
.site-footer {
  margin-left: var(--header-width);
  background: linear-gradient(180deg, var(--color-primary-dark), var(--color-primary));
  color: var(--color-bg);
  position: relative;
}

.site-footer::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 38%, var(--color-support) 38%, var(--color-support) 68%, var(--color-primary-light) 68%);
}

.footer-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-8) var(--container-pad) var(--space-6);
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1.4fr;
  gap: var(--space-8);
}

.footer-panel {
  min-width: 0;
}

.footer-brand {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  color: #fff;
  margin-bottom: var(--space-3);
}

.footer-brand span {
  color: var(--color-accent);
}

.footer-trust {
  font-size: 0.875rem;
  color: rgba(247, 242, 233, 0.65);
  max-width: 30ch;
  line-height: 1.7;
}

.footer-heading {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: rgba(247, 242, 233, 0.9);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid rgba(255, 107, 53, 0.4);
  display: inline-block;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links a {
  color: rgba(247, 242, 233, 0.7);
  font-size: 0.9rem;
  padding: 0.3rem 0.5rem;
  margin-left: -0.5rem;
  border-radius: var(--radius-sm);
  display: inline-block;
  transition: color var(--duration-fast) var(--ease), background var(--duration-fast) var(--ease);
}

.footer-links a:hover {
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.1);
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: rgba(247, 242, 233, 0.65);
  line-height: 1.6;
}

.footer-contact-list li {
  word-break: break-all;
}

.footer-support-note {
  margin-top: var(--space-4);
  font-size: 0.8rem;
  color: rgba(247, 242, 233, 0.5);
  border-left: 2px solid var(--color-support);
  padding-left: var(--space-3);
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid rgba(247, 242, 233, 0.08);
  padding: var(--space-4) var(--container-pad);
  max-width: var(--container-max);
  margin-inline: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-family: var(--font-numeric);
  font-size: 0.78rem;
  color: rgba(247, 242, 233, 0.45);
}

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.2;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease),
    border-color var(--duration-fast) var(--ease),
    box-shadow var(--duration-fast) var(--ease);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  box-shadow: 0 4px 18px rgba(255, 107, 53, 0.3);
}

.btn-primary:active {
  background: #c94418;
  border-color: #c94418;
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-bg);
  border-color: var(--color-primary);
}

/* ========== BADGES ========== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.4;
  background: rgba(0, 194, 168, 0.12);
  color: var(--color-support-dark);
  border: 1px solid rgba(0, 194, 168, 0.25);
  white-space: nowrap;
}

.badge--accent {
  background: rgba(255, 107, 53, 0.12);
  color: var(--color-accent-dark);
  border-color: rgba(255, 107, 53, 0.3);
}

.badge--primary {
  background: rgba(10, 31, 68, 0.08);
  color: var(--color-primary);
  border-color: rgba(10, 31, 68, 0.12);
}

/* ========== CARDS ========== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: 0 1px 3px rgba(10, 31, 68, 0.04);
  transition: box-shadow var(--duration-fast) var(--ease),
    border-color var(--duration-fast) var(--ease);
}

.card:hover {
  box-shadow: 0 8px 26px rgba(10, 31, 68, 0.08);
  border-color: rgba(10, 31, 68, 0.16);
}

/* ========== GRID ========== */
.grid {
  display: grid;
  gap: var(--space-5);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ========== SECTION ========== */
.section {
  padding-block: var(--space-8);
}

.section-head {
  margin-bottom: var(--space-6);
}

.section-kicker {
  font-family: var(--font-numeric);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: var(--space-2);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--color-primary);
  padding-bottom: var(--space-3);
  position: relative;
}

.section-title::after {
  content: "";
  display: block;
  width: 48px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  margin-top: var(--space-3);
}

/* ========== BREADCRUMB ========== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 0.813rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.breadcrumb a {
  color: var(--color-primary);
  font-weight: 500;
  transition: color var(--duration-fast) var(--ease);
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb-sep {
  font-family: var(--font-numeric);
  color: rgba(90, 107, 124, 0.5);
}

/* ========== DIVIDER ========== */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: var(--space-6);
}

/* ========== IMG FRAME ========== */
.img-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-border);
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.img-frame::before {
  content: "IMG";
  font-family: var(--font-numeric);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  opacity: 0.45;
}

.img-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame:has(img)::before {
  display: none;
}

.aspect-4x3 {
  aspect-ratio: 4 / 3;
}

.aspect-1x1 {
  aspect-ratio: 1 / 1;
}

.aspect-wide {
  aspect-ratio: 21 / 9;
}

/* ========== DATA TABLE ========== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.data-table th {
  background: var(--color-primary);
  color: var(--color-bg);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.8rem;
  text-align: left;
  padding: 0.8rem 1rem;
  white-space: nowrap;
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-numeric);
}

.data-table tbody tr {
  transition: background var(--duration-fast) var(--ease);
}

.data-table tbody tr:hover {
  background: rgba(10, 31, 68, 0.04);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* ========== SCROLL PROGRESS ========== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--color-accent), var(--color-support));
  z-index: 2000;
  pointer-events: none;
}

/* ========== BACK TO TOP ========== */
.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-bg);
  border: 2px solid rgba(255, 107, 53, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  line-height: 1;
  z-index: 1500;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease),
    border-color var(--duration-fast) var(--ease),
    transform var(--duration-fast) var(--ease);
}

.back-to-top:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-3px);
}

.back-to-top:active {
  transform: translateY(0);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1023px) {
  :root {
    --header-width: var(--header-width-tablet);
  }

  .site-header {
    padding: 1rem 0.875rem;
  }

  .brand-name {
    font-size: 1.3rem;
  }

  .brand-version {
    font-size: 0.6rem;
  }

  .brand-meta {
    font-size: 0.66rem;
  }

  .nav-link {
    padding: 0.55rem 0.7rem;
    font-size: 0.88rem;
  }

  .footer-inner {
    gap: var(--space-5);
  }
}

@media (max-width: 767px) {
  :root {
    --header-width: 0px;
  }

  #main-content {
    margin-left: 0;
    padding-top: var(--mobile-header-height);
  }

  .site-footer {
    margin-left: 0;
  }

  .site-header {
    position: fixed;
    inset: 0 0 auto 0;
    width: 100%;
    height: var(--mobile-header-height);
    padding: 0 1rem;
    flex-direction: row;
    align-items: center;
    overflow: visible;
    border-right: none;
    background: var(--color-primary);
  }

  .site-header::after {
    bottom: auto;
    top: auto;
    bottom: -4px;
    height: 4px;
  }

  .header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex: 1;
    height: 100%;
    min-height: 0;
  }

  .brand-block {
    padding: 0;
    border-bottom: none;
  }

  .brand-link {
    align-items: center;
  }

  .brand-name {
    font-size: 1.2rem;
  }

  .brand-meta {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: var(--mobile-header-height);
    left: 0;
    right: 0;
    margin: 0;
    background: var(--color-primary-dark);
    padding: var(--space-5) var(--space-4) var(--space-6);
    border-bottom: 1px solid rgba(255, 107, 53, 0.25);
    box-shadow: 0 16px 30px rgba(6, 18, 43, 0.45);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-fast) var(--ease),
      transform var(--duration-fast) var(--ease),
      visibility var(--duration-fast);
    max-height: calc(100vh - var(--mobile-header-height));
    overflow-y: auto;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-title {
    display: none;
  }

  .nav-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }

  .nav-link {
    padding: 0.6rem 0.75rem;
    font-size: 0.9rem;
  }

  .header-status {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(1) {
    transform: rotate(45deg) translateY(5px);
  }

  .nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(2) {
    transform: rotate(-45deg) translateY(-5px);
  }

  .nav-toggle[aria-expanded="true"] .toggle-text {
    opacity: 0;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    padding: var(--space-6) var(--container-pad);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--space-2);
  }

  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .btn {
    width: 100%;
  }
}

@media (max-width: 479px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

  .nav-list {
    grid-template-columns: 1fr;
  }

  .back-to-top {
    bottom: 1rem;
    right: 1rem;
  }
}

/* ========== REDUCED MOTION ========== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .scroll-progress {
    display: none !important;
  }
}