/* ============================================================
   1. CSS CUSTOM PROPERTIES — THEMES
   ============================================================ */

:root,
[data-theme="light"] {
  --bg-primary:      #f8f9fa;
  --bg-secondary:    #ffffff;
  --bg-card:         #ffffff;
  --text-primary:    #1a1a2e;
  --text-secondary:  #4a4a6a;
  --text-muted:      #888899;
  --accent:          #c0392b;
  --accent-hover:    #96281b;
  --accent-light:    #f9e6e4;
  --border-color:    #e0e0e8;
  --shadow-sm:       0 1px 4px rgba(0,0,0,0.06);
  --shadow-md:       0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:       0 8px 32px rgba(0,0,0,0.14);
  --header-bg:       rgba(255,255,255,0.92);
  --overlay-start:   rgba(10,10,20,0.30);
  --overlay-end:     rgba(10,10,20,0.70);
  --hero-text:       #ffffff;
  --cta-bg:          rgba(192,57,43,0.88);
  --cta-hover:       rgba(150,40,27,0.95);
  --transition:      0.3s ease;
  --radius-sm:       6px;
  --radius-md:       10px;
  --radius-lg:       16px;
  --header-h:        64px;
  --font-sans:       'Segoe UI', system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
  --bg-primary:      #0d0d1a;
  --bg-secondary:    #13132a;
  --bg-card:         #1a1a2e;
  --text-primary:    #e8e8f4;
  --text-secondary:  #aaaacc;
  --text-muted:      #606080;
  --accent:          #e74c3c;
  --accent-hover:    #c0392b;
  --accent-light:    #2a1010;
  --border-color:    #2a2a44;
  --shadow-sm:       0 1px 4px rgba(0,0,0,0.3);
  --shadow-md:       0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg:       0 8px 32px rgba(0,0,0,0.6);
  --header-bg:       rgba(13,13,26,0.95);
  --overlay-start:   rgba(0,0,0,0.30);
  --overlay-end:     rgba(0,0,0,0.75);
  --cta-bg:          rgba(231,76,60,0.85);
  --cta-hover:       rgba(192,57,43,0.95);
}

/* ============================================================
   2. RESET & BASE
   ============================================================ */

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

/* Smooth theme transitions — exclude transforms for perf */
html,
body,
header,
main,
section,
article,
div,
nav,
button,
a,
p,
h1, h2, h3, h4,
time,
span,
img {
  transition:
    background-color var(--transition),
    color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    opacity var(--transition);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ============================================================
   3. HEADER
   ============================================================ */

#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 1rem;
  max-width: 1400px;
  margin: 0 auto;
}

.site-title-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  outline: none;
}

.site-title-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.site-title-text {
  font-size: clamp(0.9rem, 2.5vw, 1.15rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  white-space: nowrap;
  line-height: 1.2;
}

.title-break { display: none; }

@media (max-width: 575px) {
  .site-title-text { white-space: normal; }
  .title-break { display: block; }
}

.accent-dot {
  color: var(--accent);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-header {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.75rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font-sans);
}

.btn-header:hover {
  background: var(--bg-secondary);
  border-color: var(--accent);
  color: var(--accent);
}

.btn-header:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn-header.btn-active {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

.btn-theme-toggle {
  padding: 0.4rem 0.5rem;
}

.icon-sun,
.icon-moon {
  display: inline-flex;
  align-items: center;
}

/* Hide label on very small screens */
@media (max-width: 380px) {
  .btn-label { display: none; }
  .btn-header { padding: 0.4rem 0.5rem; }
}

/* ============================================================
   4. HERO SECTION
   ============================================================ */

#hero {
  min-height: 100vh;
  background-image: url('../assets/hero.jpg');
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding-top: var(--header-h);
}

/* Gradient overlay — adapts to theme */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    var(--overlay-start) 0%,
    var(--overlay-end) 100%
  );
  pointer-events: none;
  z-index: 0;
}

/* Fallback background if no image */
#hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1a1a2e 0%, #3d1c1c 50%, #1a1a2e 100%);
  z-index: -1;
}

.hero-spacer {
  flex: 1;
  min-height: 2rem;
  position: relative;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 1;
  flex: 0 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem 1.5rem;
}

.hero-content-inner {
  text-align: center;
  max-width: 680px;
}

.hero-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(192,57,43,0.18);
  border: 1px solid rgba(192,57,43,0.35);
  padding: 0.3em 0.85em;
  border-radius: 99px;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: clamp(2.2rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--hero-text);
  margin-bottom: 0.5rem;
}

.hero-title-sub {
  color: var(--accent);
  display: block;
}

.hero-desc {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: rgba(255,255,255,0.82);
  margin-top: 1.25rem;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.hero-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
}

.hero-meta-sep {
  opacity: 0.4;
}

/* ─── CTA bar at bottom of hero ─── */

.hero-cta {
  position: relative;
  z-index: 1;
  flex: 0 0 auto;
  display: flex;
  justify-content: center;
  padding: 1.5rem 1rem 2.5rem;
  background: linear-gradient(transparent, rgba(0,0,0,0.35));
}

.hero-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2.5rem;
  background: var(--cta-bg);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(192,57,43,0.4);
  backdrop-filter: blur(4px);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s !important;
}

.hero-cta-btn:hover {
  background: var(--cta-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(192,57,43,0.5);
  color: #fff;
}

.hero-cta-btn:active {
  transform: translateY(0);
}

.hero-cta-btn svg {
  animation: bounce-arrow 2s ease-in-out infinite;
}

@keyframes bounce-arrow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(4px); }
}

/* ============================================================
   5. POSTS LIST
   ============================================================ */

.posts-section {
  background: var(--bg-primary);
  padding: 3rem 0 4rem;
}

.posts-container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1rem;
}

.posts-header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border-color);
}

.posts-header-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

/* ─── Search bar ─── */

.search-bar {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  color: var(--text-muted);
  pointer-events: none;
  flex-shrink: 0;
}

.search-input {
  width: 100%;
  padding: 0.55rem 2.5rem 0.55rem 2.4rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition) !important;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(192,57,43,0.12);
}

/* hide native × on Chrome */
.search-input::-webkit-search-cancel-button { display: none; }

.search-clear {
  position: absolute;
  right: 0.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--border-color);
  border: none;
  border-radius: 50%;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  transition: background var(--transition), color var(--transition) !important;
}

.search-clear:hover {
  background: var(--accent);
  color: #fff;
}

/* ─── Search results ─── */

.search-mark {
  background: rgba(192,57,43,0.18);
  color: var(--accent);
  border-radius: 2px;
  padding: 0 2px;
  font-weight: 600;
}

[data-theme="dark"] .search-mark {
  background: rgba(231,76,60,0.22);
}

.search-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 3rem 1rem;
  color: var(--text-muted);
  text-align: center;
}

.search-empty svg {
  opacity: 0.35;
}

.search-empty p {
  font-size: 0.95rem;
  margin: 0;
}

/* ─── Compact card (search results) ─── */

.post-card--compact {
  height: auto;
  flex-direction: row;
}

.post-card--compact .post-card__thumb {
  width: 90px;
  height: 90px;
  flex-shrink: 0;
}

.post-card--compact .post-card__body {
  padding: 0.7rem 1rem;
  justify-content: center;
}

.post-card--compact .post-card__date {
  display: block;
  margin-bottom: 0.25rem;
}

.post-card--compact .post-card__title {
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
}

.post-card--compact .post-card__excerpt {
  font-size: 0.82rem;
  -webkit-line-clamp: 2;
  margin-bottom: 0;
}

/* ─── Table view ─── */

.posts-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.posts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.posts-table thead th {
  padding: 0.65rem 1rem;
  text-align: left;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.posts-table__col-thumb { width: 72px; }
.posts-table__col-date  { width: 130px; white-space: nowrap; }

.posts-table__row {
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition) !important;
}

.posts-table__row:last-child {
  border-bottom: none;
}

.posts-table__row:hover {
  background: var(--bg-secondary);
}

.posts-table__row:hover .posts-table__title {
  color: var(--accent);
}

.posts-table__row:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.posts-table__thumb {
  padding: 0.5rem 0.5rem 0.5rem 0.75rem;
  vertical-align: middle;
  position: relative;
}

.posts-table__thumb img {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  display: block;
}

.posts-table__thumb .post-card__badge {
  position: absolute;
  top: 0.6rem;
  left: 0.8rem;
  font-size: 0.58rem;
  padding: 0.15em 0.5em;
}

.posts-table__body {
  padding: 0.75rem 1rem;
  vertical-align: middle;
}

.posts-table__title {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: 0.25rem;
  transition: color var(--transition) !important;
}

.posts-table__excerpt {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}

.posts-table__date {
  padding: 0.75rem 1rem 0.75rem 0;
  vertical-align: middle;
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* hide excerpt column on xs */
@media (max-width: 575px) {
  .posts-table__excerpt { display: none; }
  .posts-table__col-date { width: 90px; }
  .posts-table__date { font-size: 0.72rem; }
}

.posts-section-title {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.posts-count {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.posts-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* ─── Post card ─── */

.post-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease !important;
}

.post-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.post-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.post-card__thumb {
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  width: 100%;
  height: 200px;
}

.post-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease !important;
}

.post-card:hover .post-card__thumb img {
  transform: scale(1.04);
}

.post-card__badge {
  position: absolute;
  top: 0.6rem;
  left: 0.6rem;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.25em 0.65em;
  border-radius: 4px;
  color: #fff;
}

.post-card__badge--video {
  background: var(--accent);
}

.post-card__body {
  padding: 1rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.post-card__meta {
  margin-bottom: 0.4rem;
}

.post-card__date {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.post-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.post-card__excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__read-more {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.02em;
}

/* md+: horizontal layout — image left, text right */
@media (min-width: 768px) {
  .post-card {
    flex-direction: row;
    height: 190px;
  }

  .post-card__thumb {
    width: 260px;
    height: 100%;
  }

  .post-card__title {
    font-size: 1.1rem;
  }

  .post-card__excerpt {
    -webkit-line-clamp: 2;
  }
}

@media (min-width: 992px) {
  .posts-container {
    padding: 0 2rem;
  }

  .post-card__thumb {
    width: 300px;
  }
}

/* ============================================================
   6. POST DETAIL
   ============================================================ */

.post-detail {
  padding-top: var(--header-h);
  min-height: 100vh;
  background: var(--bg-primary);
}

.post-detail__hero-wrap {
  width: 100%;
  max-height: 55vh;
  overflow: hidden;
  background: var(--bg-secondary);
}

.post-detail__hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-height: 55vh;
}

.post-detail__video-wrap {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  background: #000;
  overflow: hidden;
}

.post-detail__video-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.post-detail__body {
  background: var(--bg-primary);
}

.post-detail__hero-wrap + .post-detail__content,
.post-detail__video-wrap + .post-detail__content,
.post-detail__content + .post-detail__hero-wrap,
.post-detail__content + .post-detail__video-wrap {
  margin-top: 2rem;
}

.post-detail__content + .post-detail__content {
  margin-top: 1.5rem;
}

.post-detail__doc-links {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  padding: .75rem 0;
}

.btn-doc {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem 1rem;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 500;
  text-decoration: none;
  border: 2px solid var(--accent);
  color: var(--accent);
  background: transparent;
  transition: background var(--transition), color var(--transition);
}

.btn-doc:hover {
  background: var(--accent);
  color: #fff;
}

.btn-doc--link {
  border-color: var(--text-secondary);
  color: var(--text-secondary);
}

.btn-doc--link:hover {
  background: var(--text-secondary);
  color: var(--bg-primary);
}

.post-detail__inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.post-detail__meta {
  margin-bottom: 0.75rem;
}

.post-detail__date {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.post-detail__title {
  font-size: clamp(1.6rem, 4.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.post-detail__content {
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  line-height: 1.8;
  color: var(--text-secondary);
}

.post-detail__content p {
  margin-bottom: 1.35rem;
}

.post-detail__content p:last-child {
  margin-bottom: 0;
}

.post-detail__footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font-sans);
}

.btn-back:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

@media (min-width: 768px) {
  .post-detail__inner {
    padding: 3rem 2rem 5rem;
  }
}

/* ============================================================
   7. SCROLLBAR (optional cosmetic, webkit only)
   ============================================================ */

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* ============================================================
   8. UTILITY
   ============================================================ */

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 9999;
}

.skip-link:focus {
  top: 1rem;
}

/* ============================================================
   9. RESPONSIVE — large screens
   ============================================================ */

@media (min-width: 1200px) {
  .posts-container {
    max-width: 960px;
  }
}

@media (min-width: 1400px) {
  .posts-container {
    max-width: 1000px;
  }
}

/* ============================================================
   10. LANDSCAPE PHONE (sm, special case)
   ============================================================ */

@media (max-height: 500px) and (orientation: landscape) {
  #hero {
    min-height: 100vh;
  }

  .hero-title {
    font-size: clamp(1.6rem, 5vw, 2.8rem);
  }

  .hero-content {
    padding: 1rem 1.5rem;
  }

  .hero-spacer {
    min-height: 0.5rem;
    flex: 0;
  }
}