/* ============================================================
   BAND Akademie — Modern UI · WCAG AA · Glasmorphism + Gradient
   ============================================================ */

:root {
  --primary: #ce7a16;
  --primary-strong: #a65e0f;
  --primary-dark: #a65e0f; /* back-compat */
  --primary-soft: #fff3e4;
  --primary-light: #fff3e4; /* back-compat */
  --primary-glow: rgba(206, 122, 22, 0.16);
  --accent: #2a5d8f;
  --accent-soft: #e8f1f9;

  --bg: #fafaf7;
  --bg-elev: #ffffff;
  --surface: #f3f2ee;
  --surface-deep: #eceae4;

  --fg: #1a1a1a;
  --fg-muted: #55534d;
  --fg-subtle: #86847d;
  --border: #e3e1dc;
  --border-strong: #c9c7c1;

  --success: #136c3b;
  --success-soft: #e1f2e7;
  --warn: #8d5a00;
  --warn-soft: #fff4dd;
  --danger: #a8141e;
  --danger-soft: #fdecee;

  --fs-base: 17px;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(10, 10, 10, .05);
  --shadow: 0 4px 18px rgba(10, 10, 10, .06), 0 1px 2px rgba(10, 10, 10, .05);
  --shadow-lg: 0 18px 42px -10px rgba(20, 20, 20, .15), 0 4px 14px rgba(10, 10, 10, .07);
  --shadow-ring: 0 0 0 3px var(--primary-glow);
  --gradient-primary: linear-gradient(135deg, #ce7a16 0%, #e79729 55%, #f5b04a 100%);
  --gradient-soft: linear-gradient(135deg, #fff6e5 0%, #f7efe2 60%, #f0e8db 100%);
  --ease: cubic-bezier(.4, .0, .2, 1);
  --dur-fast: 140ms;
  --dur: 240ms;
  --maxw: 1180px;
  --space-section: clamp(40px, 6vw, 72px);
  --header-h: 68px;
}

body.hc {
  --bg: #000; --bg-elev: #0a0a0a; --surface: #121212; --surface-deep: #1c1c1c;
  --fg: #fff; --fg-muted: #e8e8e8; --fg-subtle: #bcbcbc;
  --border: #444; --border-strong: #888;
  --primary: #ffc15c; --primary-strong: #ffd894; --primary-dark: #ffd894;
  --primary-soft: #1d1d1d; --primary-light: #1d1d1d;
  --primary-glow: rgba(255, 193, 92, .5);
  --gradient-primary: linear-gradient(135deg, #ffc15c, #ffd894);
  --gradient-soft: linear-gradient(135deg, #1d1d1d, #121212);
  --shadow: 0 0 0 1px var(--border);
  --shadow-lg: 0 0 0 2px var(--border-strong);
}

body.fs-lg { --fs-base: 19px; }
body.fs-xl { --fs-base: 22px; }

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

html { font-size: var(--fs-base); }

body {
  margin: 0;
  min-height: 100dvh;
  font-family: "Inter", "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: -10%;
  pointer-events: none;
  background:
    radial-gradient(600px circle at 0% 0%, var(--primary-glow), transparent 55%),
    radial-gradient(500px circle at 100% 100%, rgba(42, 93, 143, .08), transparent 55%);
  z-index: -1;
}

h1, h2, h3, h4 { font-weight: 700; letter-spacing: -.01em; line-height: 1.2; color: var(--fg); }
h1 { font-size: clamp(1.8rem, 2.6vw, 2.6rem); margin: 0 0 .6em; }
h2 { font-size: clamp(1.35rem, 1.8vw, 1.7rem); margin: 1.4em 0 .6em; }
h3 { font-size: 1.18rem; margin: 1.2em 0 .5em; }
p { margin: 0 0 1em; }

a { color: var(--primary-strong); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1.5px; transition: color var(--dur-fast); }
a:hover { color: var(--primary); text-decoration-thickness: 2px; }

a:focus-visible, button:focus-visible, [role="button"]:focus-visible,
input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 6px;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(16px, 3vw, 28px); }

/* Skip Link */
.skip-link {
  position: absolute; left: -9999px;
  background: var(--gradient-primary); color: white;
  padding: 14px 20px; border-radius: 8px; font-weight: 600; z-index: 999;
  box-shadow: var(--shadow-lg);
}
.skip-link:focus { left: 16px; top: 16px; color: white; text-decoration: none; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 80;
  background: color-mix(in srgb, var(--bg-elev) 92%, transparent);
  backdrop-filter: saturate(1.2) blur(14px);
  -webkit-backdrop-filter: saturate(1.2) blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; gap: 22px;
  padding: 14px clamp(16px, 3vw, 28px);
  max-width: var(--maxw); margin: 0 auto; flex-wrap: wrap;
}
.brand {
  display: inline-flex; align-items: baseline; gap: 6px;
  font-weight: 800; font-size: 1.18rem; color: var(--fg);
  text-decoration: none; letter-spacing: -.02em;
}
.brand strong {
  background: var(--gradient-primary);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-weight: 900;
}
.brand span { color: var(--fg-muted); font-weight: 500; }

.main-nav { display: flex; gap: 6px; margin-left: auto; align-items: center; flex-wrap: wrap; }
.main-nav a, .main-nav .link-btn {
  color: var(--fg); font-weight: 500; text-decoration: none;
  padding: 9px 14px; border-radius: 10px;
  background: none; border: none; cursor: pointer; font: inherit;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.main-nav a:hover, .main-nav .link-btn:hover { background: var(--surface); color: var(--primary-strong); }
.inline-form { display: inline; }

.a11y-toolbar {
  display: inline-flex; gap: 4px; padding: 4px;
  border-radius: 10px; background: var(--surface);
  border: 1px solid var(--border); margin-left: 8px;
}
.a11y-btn {
  padding: 6px 11px; border: 0; background: transparent; color: var(--fg);
  border-radius: 7px; cursor: pointer; font-size: .88rem; font-weight: 500;
}
.a11y-btn[aria-pressed="true"] { background: var(--primary); color: white; }

/* Flash */
.flashes { margin: 18px auto; max-width: var(--maxw); padding: 0 20px; }
.flash { padding: 14px 18px; border-radius: 12px; margin-bottom: 10px; border: 1px solid; display: flex; gap: 10px; align-items: start; }
.flash-info { background: var(--accent-soft); border-color: var(--accent); color: #11334d; }
.flash-success { background: var(--success-soft); border-color: var(--success); color: var(--success); }
.flash-error, .flash-danger { background: var(--danger-soft); border-color: var(--danger); color: var(--danger); }
.flash-warning { background: var(--warn-soft); border-color: var(--warn); color: var(--warn); }

/* Hero */
.hero {
  position: relative; padding: clamp(56px, 10vw, 112px) 20px clamp(40px, 7vw, 80px);
  text-align: center; overflow: hidden; isolation: isolate;
}
.hero::before { content: ""; position: absolute; inset: 0; background: var(--gradient-soft); z-index: -2; }
.hero::after {
  content: ""; position: absolute; top: -40%; left: 50%; translate: -50% 0;
  width: 140%; aspect-ratio: 2/1;
  background: radial-gradient(ellipse at center, var(--primary-glow), transparent 55%);
  z-index: -1; filter: blur(30px);
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 800; letter-spacing: -.03em; margin: 0 0 18px;
  background: linear-gradient(180deg, var(--fg) 0%, color-mix(in srgb, var(--fg) 72%, var(--primary)) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { font-size: clamp(1.05rem, 1.4vw, 1.3rem); max-width: 680px; margin: 0 auto 32px; color: var(--fg-muted); }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 22px; background: var(--gradient-primary); color: #fff !important;
  border: 0; border-radius: 12px; font-weight: 600; font-size: 1rem;
  text-decoration: none; cursor: pointer; line-height: 1.2;
  transition: transform var(--dur-fast), box-shadow var(--dur-fast), filter var(--dur-fast);
  box-shadow: 0 1px 2px rgba(0,0,0,.06), 0 4px 14px rgba(206,122,22,.28);
}
.btn:hover, .btn:focus-visible { transform: translateY(-1px); filter: brightness(1.03); box-shadow: 0 2px 4px rgba(0,0,0,.08), 0 10px 22px rgba(206,122,22,.35); color: white; }
.btn:active { transform: translateY(0); }
.btn-secondary {
  background: var(--bg-elev); color: var(--primary-strong) !important;
  border: 1.5px solid var(--border-strong); box-shadow: var(--shadow-sm);
}
.btn-secondary:hover, .btn-secondary:focus-visible { background: var(--primary-soft); border-color: var(--primary); }
.btn-ghost { background: transparent; color: var(--fg) !important; box-shadow: none; }
.btn-ghost:hover { background: var(--surface); }
.btn-block { display: flex; width: 100%; }
.btn-sm { padding: 8px 14px; font-size: .93rem; border-radius: 9px; }
.btn-lg { padding: 16px 30px; font-size: 1.1rem; }
.link-btn { background: none; border: 0; padding: 0; color: var(--primary-strong); cursor: pointer; font: inherit; text-decoration: underline; }

/* Forms */
label { display: block; font-weight: 600; margin: 14px 0 6px; font-size: .96rem; }
input[type="text"], input[type="email"], input[type="password"],
input[type="number"], input[type="tel"], input[type="url"],
input[type="date"], input[type="datetime-local"], input[type="time"],
input[type="search"], input[type="file"], select, textarea {
  width: 100%; padding: 12px 14px; font-size: 1rem; font-family: inherit;
  background: var(--bg-elev); color: var(--fg);
  border: 1.5px solid var(--border); border-radius: 10px;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
input:hover, select:hover, textarea:hover { border-color: var(--border-strong); }
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: var(--shadow-ring); outline: none; }
textarea { resize: vertical; min-height: 100px; }
.form-help { font-size: .88rem; color: var(--fg-subtle); margin: 4px 0; }
.required::after { content: " *"; color: var(--danger); }

fieldset { border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; margin: 12px 0; }
fieldset legend { padding: 0 6px; font-weight: 600; }

/* Filter Panel / Pills */
.filter-panel { background: var(--bg-elev); padding: 24px 22px; border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); margin: 20px 0 30px; }
.filter-group { margin: 14px 0; }
.filter-group-title { font-weight: 700; font-size: .88rem; letter-spacing: .04em; text-transform: uppercase; color: var(--fg-subtle); margin-bottom: 10px; }
.filter-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border: 1.5px solid var(--border); border-radius: 999px;
  background: var(--bg-elev); color: var(--fg); text-decoration: none; cursor: pointer;
  font-size: .94rem; font-weight: 500;
  transition: background var(--dur-fast), border-color var(--dur-fast), transform var(--dur-fast);
}
.pill:hover { border-color: var(--primary); transform: translateY(-1px); }
.pill.active, .pill[aria-pressed="true"] {
  background: var(--gradient-primary); color: white; border-color: transparent;
  box-shadow: 0 4px 14px rgba(206,122,22,.28);
}
.pill input { display: none; }

.search-field { border: 2px solid var(--primary); padding: 14px 18px; font-size: 1.05rem; border-radius: 12px; width: 100%; }
.search-field:focus { box-shadow: 0 0 0 4px var(--primary-glow); }

/* Cards */
.card { background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-sm); }
.card-hover { transition: transform var(--dur), box-shadow var(--dur), border-color var(--dur); }
.card-hover:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--primary); }

/* Course Grid */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 20px; margin: 28px 0; }
.course-card {
  position: relative; background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  display: flex; flex-direction: column; gap: 12px;
  transition: transform var(--dur), box-shadow var(--dur), border-color var(--dur);
  overflow: hidden;
}
.course-card::before {
  content: ""; position: absolute; inset: 0 0 auto; height: 4px;
  background: var(--gradient-primary); opacity: 0; transition: opacity var(--dur);
}
.course-card:hover, .course-card:focus-within {
  transform: translateY(-4px); border-color: var(--primary); box-shadow: var(--shadow-lg);
}
.course-card:hover::before, .course-card:focus-within::before { opacity: 1; }
.course-card h3 { margin: 0; font-size: 1.18rem; line-height: 1.3; }
.course-card h3 a { color: var(--fg); text-decoration: none; }
.course-card h3 a:hover { color: var(--primary-strong); text-decoration: underline; }
.course-card-tags { display: flex; flex-wrap: wrap; gap: 6px; font-size: .8rem; }
.course-card-footer { display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding-top: 14px; border-top: 1px solid var(--border); }

.tag { padding: 4px 11px; background: var(--primary-soft); color: var(--primary-strong); border-radius: 999px; font-weight: 500; }
.tag-accent { background: var(--accent-soft); color: var(--accent); }

/* Status Badge */
.status-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; font-size: .82rem; font-weight: 700;
  border-radius: 999px; border: 1.5px solid; letter-spacing: .02em;
}
.status-badge::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.status-available { background: var(--success-soft); color: var(--success); border-color: var(--success); }
.status-few { background: var(--warn-soft); color: var(--warn); border-color: var(--warn); }
.status-full { background: var(--danger-soft); color: var(--danger); border-color: var(--danger); }

/* Pagination */
.pagination { display: flex; gap: 6px; justify-content: center; margin: 36px 0; flex-wrap: wrap; }
.pagination a, .pagination span {
  padding: 10px 16px; border: 1.5px solid var(--border); border-radius: 10px;
  text-decoration: none; color: var(--fg); font-weight: 500; transition: all var(--dur-fast);
}
.pagination a:hover { border-color: var(--primary); background: var(--primary-soft); }
.pagination .active { background: var(--gradient-primary); color: white; border-color: transparent; box-shadow: 0 4px 14px rgba(206,122,22,.28); }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; margin: 20px 0; background: var(--bg-elev); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.data-table th, .data-table td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { background: var(--surface); font-weight: 700; font-size: .9rem; letter-spacing: .02em; }
.data-table tbody tr { transition: background var(--dur-fast); }
.data-table tbody tr:hover { background: var(--surface); }
.data-table tbody tr:last-child td { border-bottom: 0; }

/* Progress Bar */
.progress { background: var(--surface); border-radius: 999px; height: 10px; overflow: hidden; box-shadow: inset 0 1px 2px rgba(0,0,0,.05); }
.progress-fill { background: var(--gradient-primary); height: 100%; border-radius: inherit; transition: width var(--dur); }

/* Course Detail */
.course-detail { display: grid; grid-template-columns: 1.6fr 1fr; gap: clamp(20px, 3vw, 40px); margin-top: 32px; }
@media (max-width: 900px) { .course-detail { grid-template-columns: 1fr; } }
.course-sidebar {
  background: var(--bg-elev); padding: 28px; border-radius: var(--radius);
  border: 1px solid var(--border); box-shadow: var(--shadow);
  position: sticky; top: calc(var(--header-h) + 16px); align-self: start;
}
.price-table { width: 100%; border-collapse: collapse; margin: 10px 0; }
.price-table th, .price-table td { padding: 10px 6px; border-bottom: 1px solid var(--border); text-align: left; font-size: .95rem; }
.price-table td { text-align: right; font-weight: 600; }

/* Footer */
.site-footer { margin-top: var(--space-section); padding: 48px 0 32px; background: var(--surface-deep); border-top: 1px solid var(--border); font-size: .92rem; color: var(--fg-muted); }
.site-footer .container { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 36px; }
@media (max-width: 800px) { .site-footer .container { grid-template-columns: 1fr; gap: 24px; } }
.site-footer a { color: var(--fg-muted); text-decoration: none; }
.site-footer a:hover { color: var(--primary-strong); text-decoration: underline; }
.site-footer h4 { font-size: .92rem; letter-spacing: .06em; text-transform: uppercase; margin: 0 0 12px; color: var(--fg-subtle); }
.site-footer ul { list-style: none; padding: 0; margin: 0; line-height: 1.9; }

/* Misc */
.crumbs { font-size: .92rem; margin: 14px 0; color: var(--fg-muted); }
.crumbs a { color: var(--fg-muted); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.empty-state { text-align: center; padding: 42px 20px; background: var(--surface); border: 1.5px dashed var(--border-strong); border-radius: var(--radius); color: var(--fg-muted); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin: 18px 0 28px; }
.stat-card { background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow-sm); }
.stat-card .stat-value { font-size: 2.1rem; font-weight: 800; color: var(--primary-strong); line-height: 1; margin: 4px 0 2px; background: var(--gradient-primary); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-card .stat-label { font-size: .9rem; color: var(--fg-muted); }

.section-title { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 12px; }
.section-title h2 { margin: 0; }

.announcement {
  display: block; padding: 14px 16px;
  border-left: 3px solid var(--primary);
  background: var(--primary-soft); border-radius: 10px; margin: 10px 0;
}
.announcement-time { color: var(--fg-subtle); font-size: .85rem; }

/* Feature block */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin: 28px 0; }
.feature-card { padding: 28px 24px; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.feature-card .feature-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--primary-soft); color: var(--primary-strong);
  font-size: 22px; margin-bottom: 14px;
}
.feature-card h3 { margin: 0 0 10px; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}