/* ═══════════════════════════════════════════════════════════════
   OPENGATE TRAINING HUB — styles.css
   Dark Navy + Gold Premium Corporate Theme
═══════════════════════════════════════════════════════════════ */

/* ── Variables ─────────────────────────────────────────────── */
:root {
  --bg-root:      #04090f;
  --bg-primary:   #06101e;
  --bg-card:      #0c1e34;
  --bg-card-h:    #112540;
  --bg-modal:     #081828;
  --gold:         #f0a500;
  --gold-light:   #f8c84a;
  --amber:        #e07b00;
  --text-primary: #e2e8f4;
  --text-muted:   #7a9ac0;
  --text-dim:     #4a6a8a;
  --border:       #1a3050;
  --border-gold:  rgba(240,165,0,.35);
  --radius:       10px;
  --radius-lg:    16px;
  --shadow:       0 4px 24px rgba(0,0,0,.5);
  --shadow-gold:  0 0 24px rgba(240,165,0,.15);
  --transition:   .2s ease;
  --font:         'Inter', system-ui, sans-serif;
}

/* ── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg-root);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}
a { color: var(--gold); text-decoration: none; }
a:hover { color: var(--gold-light); }
img { max-width: 100%; }
button { cursor: pointer; font-family: var(--font); }

/* ── Loading Overlay ───────────────────────────────────────── */
#loading-overlay {
  position: fixed; inset: 0;
  background: var(--bg-root);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  z-index: 9999;
  transition: opacity .5s, visibility .5s;
}
#loading-overlay.hidden { opacity: 0; visibility: hidden; }
.loading-logo {
  font-size: 2.2rem; font-weight: 800;
  color: var(--gold); letter-spacing: .04em;
  margin-bottom: 1.5rem;
}
.loading-logo span { color: var(--text-primary); }
.loading-bar {
  width: 200px; height: 3px;
  background: var(--border);
  border-radius: 99px; overflow: hidden;
}
.loading-bar-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--amber), var(--gold));
  border-radius: 99px;
  animation: loadbar 1.8s ease forwards;
}
@keyframes loadbar { to { width: 100%; } }

/* ── Header ────────────────────────────────────────────────── */
#header {
  background: linear-gradient(135deg, #030b18 0%, #04101f 60%, #061525 100%);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 2rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
#header::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(240,165,0,.06) 0%, transparent 70%);
  pointer-events: none;
}
.header-brand {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 800;
  color: var(--gold);
  letter-spacing: .04em;
  line-height: 1.1;
}
.header-brand span { color: var(--text-primary); font-weight: 400; }
.header-tagline {
  color: var(--text-muted);
  font-size: clamp(.8rem, 1.8vw, 1rem);
  margin-top: .5rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.header-stats {
  display: flex; gap: 2rem;
  justify-content: center;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}
.stat-item {
  text-align: center;
}
.stat-number {
  font-size: 1.6rem; font-weight: 700;
  color: var(--gold); line-height: 1;
}
.stat-label {
  font-size: .7rem; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: .1em;
  margin-top: .2rem;
}

/* ── Search & Filters ──────────────────────────────────────── */
#search-section {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  padding: 1.2rem 2rem;
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
}
.search-row {
  display: flex; gap: .75rem;
  max-width: 900px; margin: 0 auto 1rem;
}
.search-wrap {
  position: relative; flex: 1;
}
.search-icon {
  position: absolute; left: .9rem; top: 50%; transform: translateY(-50%);
  color: var(--text-dim); font-size: 1rem; pointer-events: none;
}
#search-input {
  width: 100%; padding: .65rem 2.5rem .65rem 2.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: .95rem; font-family: var(--font);
  transition: border-color var(--transition), box-shadow var(--transition);
}
#search-input:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(240,165,0,.15);
}
#search-clear {
  position: absolute; right: .7rem; top: 50%; transform: translateY(-50%);
  background: none; border: none;
  color: var(--text-dim); font-size: 1.1rem;
  display: none; line-height: 1;
  padding: .2rem;
}
#search-clear.visible { display: block; }
#search-clear:hover { color: var(--text-primary); }

.filters-row {
  display: flex; gap: .6rem; flex-wrap: wrap;
  max-width: 900px; margin: 0 auto;
  align-items: center;
}
.filter-select {
  padding: .45rem .8rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: .82rem; font-family: var(--font);
  cursor: pointer;
  transition: border-color var(--transition);
}
.filter-select:focus { outline: none; border-color: var(--gold); }
.filter-select option { background: var(--bg-card); }

.btn-clear-filters {
  padding: .45rem .9rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-size: .82rem;
  transition: all var(--transition);
}
.btn-clear-filters:hover {
  border-color: var(--amber);
  color: var(--amber);
}

/* ── Results bar ───────────────────────────────────────────── */
#results-bar {
  max-width: 1300px; margin: 0 auto;
  padding: .9rem 2rem .4rem;
  display: flex; align-items: center; gap: .5rem;
  color: var(--text-muted); font-size: .85rem;
}
#results-count { color: var(--gold); font-weight: 600; }

/* ── Main layout ───────────────────────────────────────────── */
main {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
}

/* ── Section titles ────────────────────────────────────────── */
.section-title {
  font-size: 1.05rem; font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .1em;
  margin: 2rem 0 1rem;
  display: flex; align-items: center; gap: .6rem;
}
.section-title::after {
  content: ''; flex: 1;
  height: 1px; background: var(--border);
}

/* ── Featured Grid ─────────────────────────────────────────── */
#featured-wrap { margin-bottom: .5rem; }
#featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

/* ── Course Cards ──────────────────────────────────────────── */
#courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.1rem;
}

.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  display: flex; flex-direction: column; gap: .6rem;
  position: relative;
  overflow: hidden;
}
.course-card::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--amber), var(--gold));
  opacity: 0;
  transition: opacity var(--transition);
}
.course-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-gold);
  box-shadow: var(--shadow-gold);
}
.course-card:hover::before { opacity: 1; }

.course-card.featured-card {
  border-color: rgba(240,165,0,.25);
}
.course-card.featured-card::before { opacity: .6; }

.card-header {
  display: flex; align-items: flex-start;
  justify-content: space-between; gap: .5rem;
}
.card-code {
  font-size: .68rem; font-weight: 700;
  color: var(--text-dim);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.card-badges { display: flex; gap: .35rem; flex-wrap: wrap; }

.badge {
  font-size: .63rem; font-weight: 600;
  padding: .18rem .5rem;
  border-radius: 4px;
  letter-spacing: .04em;
  text-transform: uppercase;
  white-space: nowrap;
}
.badge-tipo {
  background: rgba(240,165,0,.12);
  color: var(--gold);
  border: 1px solid rgba(240,165,0,.25);
}
.badge-feat {
  background: rgba(240,165,0,.2);
  color: var(--gold-light);
  border: 1px solid rgba(240,165,0,.4);
}

/* Area color badges */
.badge-area { border: 1px solid currentColor; opacity: .85; }
.area-hse   { color: #ff6b6b; }
.area-oilag { color: #4ecdc4; }
.area-geo   { color: #a78bfa; }
.area-ing   { color: #60a5fa; }
.area-gest  { color: #34d399; }
.area-tech  { color: #38bdf8; }
.area-fin   { color: #fbbf24; }
.area-amb   { color: #86efac; }
.area-leg   { color: #f9a8d4; }
.area-corp  { color: #94a3b8; }

.card-title {
  font-size: .95rem; font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
  flex: 1;
}
.card-area {
  font-size: .75rem;
  color: var(--text-muted);
}
.card-footer {
  display: flex; align-items: center;
  justify-content: space-between;
  margin-top: auto; padding-top: .5rem;
  border-top: 1px solid var(--border);
}
.card-modal {
  font-size: .75rem; color: var(--text-dim);
}
.card-cta {
  font-size: .75rem; font-weight: 600;
  color: var(--gold);
  display: flex; align-items: center; gap: .3rem;
}

/* ── Empty state ───────────────────────────────────────────── */
#empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-dim);
  display: none;
}
#empty-state.visible { display: block; }
#empty-state .empty-icon { font-size: 3rem; margin-bottom: 1rem; }
#empty-state h3 { color: var(--text-muted); margin-bottom: .5rem; }

/* ── Corporate Videos ──────────────────────────────────────── */
#videos-section { margin: 2rem 0; }
#videos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.2rem;
}
.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.video-embed-wrap {
  position: relative; padding-top: 56.25%;
  background: #000;
}
.video-embed-wrap iframe {
  position: absolute; inset: 0;
  width: 100%; height: 100%; border: 0;
}
.video-info { padding: .9rem 1rem; }
.video-title { font-size: .9rem; font-weight: 600; color: var(--text-primary); }
.video-desc  { font-size: .78rem; color: var(--text-muted); margin-top: .3rem; }

/* ── Modal ─────────────────────────────────────────────────── */
#modal-overlay {
  position: fixed; inset: 0;
  background: rgba(2,8,18,.85);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
  opacity: 0; visibility: hidden;
  transition: opacity .25s, visibility .25s;
}
#modal-overlay.open { opacity: 1; visibility: visible; }

#modal-body {
  background: var(--bg-modal);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  max-width: 580px; width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 2rem;
  position: relative;
  transform: scale(.96);
  transition: transform .25s;
  box-shadow: 0 8px 48px rgba(0,0,0,.7), var(--shadow-gold);
}
#modal-overlay.open #modal-body { transform: scale(1); }

.modal-close {
  position: absolute; top: 1rem; right: 1rem;
  background: none; border: none;
  color: var(--text-dim); font-size: 1.4rem;
  width: 2rem; height: 2rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  transition: color var(--transition), background var(--transition);
}
.modal-close:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}

#modal-code {
  font-size: .7rem; font-weight: 700;
  color: var(--text-dim); letter-spacing: .1em;
  text-transform: uppercase; margin-bottom: .5rem;
}
#modal-title {
  font-size: 1.3rem; font-weight: 700;
  color: var(--text-primary); line-height: 1.3;
  margin-bottom: .75rem;
}
#modal-badges {
  display: flex; gap: .4rem; flex-wrap: wrap;
  margin-bottom: 1.2rem;
}
.modal-desc {
  color: var(--text-muted); font-size: .9rem;
  line-height: 1.65; margin-bottom: 1.4rem;
}
.modal-meta {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .9rem 1rem;
  margin-bottom: 1.4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .6rem .8rem;
  font-size: .82rem;
}
.meta-item { display: flex; flex-direction: column; gap: .1rem; }
.meta-label { color: var(--text-dim); font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; }
.meta-value { color: var(--text-primary); font-weight: 500; }

#modal-actions {
  display: flex; gap: .75rem; flex-wrap: wrap;
}
.btn {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .65rem 1.2rem;
  border-radius: var(--radius);
  font-size: .88rem; font-weight: 600;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--amber), var(--gold));
  color: #04090f;
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #04090f;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(240,165,0,.3);
}
.btn-outline {
  background: none;
  border: 1px solid var(--border-gold);
  color: var(--gold);
}
.btn-outline:hover {
  background: rgba(240,165,0,.08);
  border-color: var(--gold);
  color: var(--gold-light);
}
.btn-ghost {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.btn-ghost:hover {
  background: var(--bg-card);
  border-color: var(--text-dim);
  color: var(--text-primary);
}

/* ── WhatsApp Float ────────────────────────────────────────── */
#wa-float {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  z-index: 500;
}
#wa-float-btn {
  width: 56px; height: 56px;
  background: #25d366;
  border: none; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(37,211,102,.4);
  transition: transform var(--transition), box-shadow var(--transition);
}
#wa-float-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(37,211,102,.55);
}
#wa-float-btn svg { width: 28px; height: 28px; fill: #fff; }

/* ── Footer ────────────────────────────────────────────────── */
footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  color: var(--text-dim);
  font-size: .82rem;
}
footer .footer-brand {
  font-size: 1.1rem; font-weight: 700;
  color: var(--gold); margin-bottom: .4rem;
}
footer a { color: var(--text-muted); }
footer a:hover { color: var(--gold); }
.footer-links {
  display: flex; gap: 1.2rem;
  justify-content: center;
  margin-top: .6rem;
  flex-wrap: wrap;
}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-root); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 900px) {
  #search-section { padding: 1rem; }
  main { padding: 0 1rem 3rem; }
  .header-stats { gap: 1.2rem; }
  #courses-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}
@media (max-width: 640px) {
  #header { padding: 1.8rem 1rem 1.4rem; }
  .search-row { flex-direction: column; }
  .filters-row { gap: .4rem; }
  .filter-select { font-size: .78rem; padding: .4rem .6rem; }
  #courses-grid { grid-template-columns: 1fr; }
  #featured-grid { grid-template-columns: 1fr; }
  #modal-body { padding: 1.4rem; }
  #modal-actions { flex-direction: column; }
  .btn { justify-content: center; }
  .modal-meta { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .header-stats { gap: .8rem; }
  .stat-number { font-size: 1.3rem; }
}