/* ===== Base ===== */
:root {
  --max-width: 1100px;
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-primary: #c8a64b;
  --color-primary-dark: #a9852f;
  --color-dark: #14110f;
  --color-muted: #5a5a5a;
  --color-border: #e7e2d8;
  --color-surface: #faf8f3;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", Arial, Helvetica, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

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

a {
  color: var(--color-primary-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.site-header {
  background: var(--color-dark);
  border-bottom: 3px solid var(--color-primary);
  position: relative;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  max-width: var(--max-width);
  margin: 0 auto;
  flex-wrap: nowrap;
}

.site-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.site-logo img {
  height: 48px;
  width: auto;
}

.main-nav {
  flex: 1;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 24px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: #f3efe4;
  font-weight: 600;
  font-size: 0.95rem;
}

.main-nav a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.btn {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
  border: 2px solid transparent;
}

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

.btn-login:hover {
  background: var(--color-primary);
  color: var(--color-dark);
  text-decoration: none;
}

.btn-register {
  background: var(--color-primary);
  color: var(--color-dark);
}

.btn-register:hover {
  background: var(--color-primary-dark);
  text-decoration: none;
}

/* Burger toggle (checkbox hack, no JS) */
.burger-toggle {
  display: none;
}

.burger-label {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  flex-shrink: 0;
}

.burger-label span {
  display: block;
  width: 100%;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
}

/* ===== Breadcrumbs ===== */
.breadcrumbs {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 10px 20px;
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 6px;
  color: var(--color-muted);
}

.breadcrumbs a {
  color: var(--color-muted);
}

.breadcrumbs li:last-child {
  color: var(--color-text);
  font-weight: 600;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  display: flex;
  align-items: center;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  padding: 40px 20px;
  background-image: url("../img/banner.jpg");
  background-size: cover;
  background-position: left center;
  background-repeat: no-repeat;
  min-height: 360px;
  display: flex;
  align-items: center;
}

@media (min-width: 801px) {
  .hero-inner {
    border-radius: 14px;
    overflow: hidden;
    margin: 24px auto;
  }
}

.hero-content {
  max-width: 460px;
  background: rgba(20, 17, 15, 0.55);
  padding: 28px;
  border-radius: 10px;
}

.hero-content .hero-heading {
  color: #fff;
  margin: 0 0 12px;
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1.25;
}

.hero-content p {
  color: #f0ece0;
  margin: 0 0 18px;
}

.btn-cta {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-dark);
  padding: 12px 26px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 1rem;
}

.btn-cta:hover {
  background: var(--color-primary-dark);
  text-decoration: none;
}

/* ===== Article content ===== */
article {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 30px 20px 50px;
}

article h2 {
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 8px;
  margin-top: 40px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}

table caption {
  text-align: left;
  font-weight: 600;
  margin-bottom: 8px;
}

th, td {
  border: 1px solid var(--color-border);
  padding: 8px 10px;
  text-align: left;
}

thead th {
  background: var(--color-surface);
}

.author-box {
  background: var(--color-surface);
  padding: 14px 20px;
  border-radius: 8px;
  margin-top: 20px;
}

/* ===== TOC accordion ===== */
.toc-accordion {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin: 24px 0;
  background: var(--color-surface);
}

.toc-accordion summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 1.1rem;
  padding: 14px 18px;
  list-style: none;
}

.toc-accordion summary::-webkit-details-marker {
  display: none;
}

.toc-accordion summary::before {
  content: "▸ ";
  color: var(--color-primary-dark);
}

.toc-accordion[open] summary::before {
  content: "▾ ";
}

.toc-accordion ol {
  margin: 0;
  padding: 0 18px 18px 36px;
}

.toc-accordion li {
  margin-bottom: 6px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-dark);
  color: #d8d3c4;
  padding: 40px 0 20px;
  margin-top: 40px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 20px;
  padding: 0;
  list-style: none;
}

.footer-nav a {
  color: var(--color-primary);
  font-weight: 600;
}

.footer-note {
  font-size: 0.85rem;
  color: #a8a399;
  border-top: 1px solid #2a2622;
  padding-top: 16px;
}

.footer-note .author-box {
  background: transparent;
  padding: 0;
  margin-top: 10px;
  color: #a8a399;
}

/* ===== Responsive ===== */
@media (max-width: 800px) {
  .header-inner {
    flex-wrap: nowrap;
    padding: 10px 14px;
  }

  .site-logo img {
    height: 36px;
  }

  .main-nav {
    order: 3;
    flex-basis: 100%;
    display: none;
  }

  .burger-toggle:checked ~ .main-nav {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0;
    border-top: 1px solid #2a2622;
    margin-top: 10px;
  }

  .main-nav li {
    border-bottom: 1px solid #2a2622;
  }

  .main-nav a {
    display: block;
    padding: 12px 4px;
  }

  .header-actions {
    order: 1;
    margin-left: auto;
  }

  .btn {
    padding: 8px 12px;
    font-size: 0.8rem;
  }

  .burger-label {
    display: flex;
    order: 2;
  }

  .hero-inner {
    min-height: 280px;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-content .hero-heading {
    font-size: 1.4rem;
  }
}

@media (max-width: 480px) {
  .header-inner {
    gap: 8px;
  }

  .site-logo img {
    height: 30px;
  }

  .btn-register,
  .btn-login {
    padding: 7px 9px;
    font-size: 0.72rem;
  }

  .hero-inner {
    min-height: 220px;
    background-position: center;
  }

  .hero-content {
    padding: 18px;
  }
}