/* === Proměnné === */
:root {
  --color-bg: #fafaf9;
  --color-bg-alt: #f4f4f2;
  --color-text: #1c1917;
  --color-text-secondary: #57534e;
  --color-muted: #a8a29e;
  --color-accent: #2d6a4f;
  --color-accent-hover: #1b4332;
  --color-accent2: #b45309;
  --color-border: #e7e5e4;
  --color-border-strong: #d6d3d1;
  --color-surface: #ffffff;
  --color-danger: #dc2626;
  --color-danger-hover: #b91c1c;
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'Roboto Mono', 'Courier New', monospace;
  --font-size-base: 14px;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: var(--font-size-base); scroll-behavior: smooth; }
body { font-family: var(--font-sans); background: var(--color-bg); color: var(--color-text); line-height: 1.6; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

/* === Layout === */
.container { max-width: 860px; margin: 0 auto; padding: 0 1.25rem; }

/* === Header === */
.site-header { background: var(--color-surface); border-bottom: 1px solid var(--color-border); position: sticky; top: 0; z-index: 100; }
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.site-logo { display: flex; align-items: center; gap: 8px; color: var(--color-text); font-weight: 600; font-size: 15px; }
.site-logo svg { color: var(--color-accent); }
.site-logo:hover { text-decoration: none; color: var(--color-accent); }
.site-nav { display: flex; align-items: center; gap: 16px; }
.nav-link { color: var(--color-text-secondary); font-size: 13px; }
.nav-link--subtle { color: var(--color-muted); }

/* Přepínač jazyka */
.lang-switcher { display: flex; gap: 4px; }
.lang-switcher a { font-size: 18px; opacity: 0.4; transition: opacity 0.15s; line-height: 1; }
.lang-switcher a.active, .lang-switcher a:hover { opacity: 1; }

/* === Footer === */
.site-footer { border-top: 1px solid var(--color-border); margin-top: 4rem; padding: 1.5rem 0; }
.site-footer p { color: var(--color-muted); font-size: 13px; text-align: center; }

/* === Buttons === */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px; border: 1px solid var(--color-border-strong); border-radius: var(--radius-sm); background: var(--color-surface); font-size: 13px; font-weight: 500; color: var(--color-text); cursor: pointer; transition: background 0.15s, border-color 0.15s; white-space: nowrap; }
.btn:hover { background: var(--color-bg-alt); text-decoration: none; }
.btn--primary { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); }
.btn--danger { background: var(--color-danger); border-color: var(--color-danger); color: #fff; }
.btn--danger:hover { background: var(--color-danger-hover); }
.btn--ghost { background: transparent; border-color: transparent; color: var(--color-text-secondary); }
.btn--ghost:hover { background: var(--color-bg-alt); }
.btn--sm { padding: 4px 10px; font-size: 12px; }
.btn--lg { padding: 10px 20px; font-size: 14px; }
.btn--full { width: 100%; justify-content: center; }

/* === Badges === */
.badge { display: inline-flex; align-items: center; gap: 3px; padding: 2px 7px; border-radius: 999px; font-size: 11px; font-weight: 500; background: var(--color-bg-alt); color: var(--color-text-secondary); }
.badge--versions { background: #e0f2fe; color: #0369a1; }
.badge--video { background: #fef3c7; color: #92400e; }
.badge--capo { background: #f0fdf4; color: #166534; font-family: var(--font-mono); }
.badge-count { background: var(--color-bg-alt); color: var(--color-text-secondary); font-size: 14px; font-weight: 400; padding: 2px 10px; border-radius: 999px; margin-left: 8px; }

/* === Tag chips (pro filtry) === */
.tag-chip { display: inline-flex; align-items: center; padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 500; border: 1.5px solid var(--color-border); color: var(--color-text-secondary); background: var(--color-surface); transition: all 0.15s; }
.tag-chip:hover { border-color: var(--color-accent); color: var(--color-accent); text-decoration: none; }
.tag-chip--active { background: var(--tag-color, var(--color-accent)); border-color: transparent; color: #fff; }

/* Tag badge (v detailu písně) */
.tag-badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; background: color-mix(in srgb, var(--tag-color, #6b7280) 15%, white); color: var(--tag-color, #6b7280); border: 1.5px solid color-mix(in srgb, var(--tag-color, #6b7280) 30%, transparent); }
.tag-badge:hover { text-decoration: none; background: color-mix(in srgb, var(--tag-color, #6b7280) 25%, white); }

/* Tag dot (pro seznam) */
.tag-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; flex-shrink: 0; }

/* === INDEX PAGE === */
.page-index { padding: 2rem 1.25rem; }
.page-header { margin-bottom: 1.5rem; }
.page-header h1 { font-size: 1.5rem; font-weight: 600; color: var(--color-text); }
.song-count { color: var(--color-muted); font-size: 13px; margin-top: 2px; }

.filters-bar { display: flex; flex-direction: column; gap: 12px; margin-bottom: 1.5rem; }
.search-form { display: flex; gap: 8px; }
.search-input-wrap { position: relative; flex: 1; }
.search-icon { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--color-muted); pointer-events: none; }
.search-input-wrap input { width: 100%; padding: 8px 10px 8px 34px; border: 1px solid var(--color-border-strong); border-radius: var(--radius-sm); font-family: inherit; font-size: 14px; background: var(--color-surface); }
.search-input-wrap input:focus { outline: 2px solid var(--color-accent); outline-offset: -1px; border-color: transparent; }
.search-clear { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); background: none; border: none; color: var(--color-muted); font-size: 12px; cursor: pointer; padding: 2px 4px; }
.tag-filters { display: flex; flex-wrap: wrap; gap: 6px; }

/* Seznam písní */
.songs-list { list-style: none; display: flex; flex-direction: column; gap: 4px; }
.song-card { border: 1px solid var(--color-border); border-radius: var(--radius); background: var(--color-surface); overflow: hidden; transition: border-color 0.15s, box-shadow 0.15s; }
.song-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow); }
.song-card__link { display: flex; align-items: center; gap: 12px; padding: 14px 16px; color: var(--color-text); text-decoration: none; }
.song-card__main { flex: 1; min-width: 0; }
.song-card__title { font-size: 15px; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.song-card__meta { display: flex; gap: 6px; margin-top: 4px; flex-wrap: wrap; }
.song-card__tags { display: flex; gap: 4px; align-items: center; }
.song-card__arrow { color: var(--color-muted); flex-shrink: 0; }
.no-results { color: var(--color-text-secondary); padding: 2rem 0; text-align: center; }

/* === SONG DETAIL PAGE === */
.page-song { padding: 1.5rem 1.25rem 6rem; }

.song-header { margin-bottom: 1rem; }
.back-link { display: inline-flex; align-items: center; gap: 4px; color: var(--color-text-secondary); font-size: 13px; margin-bottom: 1rem; }
.back-link:hover { color: var(--color-accent); text-decoration: none; }
.song-title-area { margin-bottom: 0.5rem; }
.song-title { font-size: 1.6rem; font-weight: 700; line-height: 1.3; margin-bottom: 8px; }
.song-tags { display: flex; gap: 6px; flex-wrap: wrap; }

/* Záložky verzí */
.version-tabs { display: flex; gap: 4px; margin-bottom: 1rem; flex-wrap: wrap; }
.version-tab { padding: 6px 14px; border-radius: var(--radius-sm); border: 1.5px solid var(--color-border); background: var(--color-surface); font-size: 13px; font-weight: 500; color: var(--color-text-secondary); cursor: pointer; transition: all 0.15s; }
.version-tab.active { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.version-tab:hover:not(.active) { border-color: var(--color-accent); color: var(--color-accent); }

.version-panel.hidden { display: none; }

/* Řídící panel */
.control-panel { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 10px 12px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); margin-bottom: 1rem; position: sticky; top: 56px; z-index: 50; box-shadow: var(--shadow); }

.ctrl-group { display: flex; align-items: center; gap: 6px; }
.ctrl-group + .ctrl-group { padding-left: 8px; border-left: 1px solid var(--color-border); }
.ctrl-label { font-size: 11px; font-weight: 600; color: var(--color-muted); text-transform: uppercase; letter-spacing: 0.05em; white-space: nowrap; }
.ctrl-btns { display: flex; align-items: center; gap: 2px; }

.ctrl-btn { display: inline-flex; align-items: center; gap: 4px; padding: 5px 8px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); color: var(--color-text); font-size: 12px; cursor: pointer; transition: all 0.15s; }
.ctrl-btn:hover { background: var(--color-bg-alt); border-color: var(--color-border-strong); }
.ctrl-btn.active { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.ctrl-btn.active:hover { background: var(--color-accent-hover); }
.ctrl-value { font-family: var(--font-mono); font-size: 13px; font-weight: 600; min-width: 26px; text-align: center; padding: 0 4px; }
.shortcut-hint { font-size: 10px; color: var(--color-muted); font-family: var(--font-mono); }
.ctrl-btn.active .shortcut-hint { color: rgba(255,255,255,0.7); }

/* Text písně */
.song-content { margin-bottom: 2rem; }
.song-text { font-family: var(--font-mono); font-size: var(--song-font-size, 14px); line-height: 1.7; white-space: pre; overflow-x: auto; color: var(--color-text); tab-size: 4; padding: 1px 0; }

/* Video sekce */
.song-video { margin: 1.5rem 0; }
.video-embed { border-radius: var(--radius); overflow: hidden; }
.video-placeholder { background: #0f0f0f; border-radius: var(--radius); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; padding: 3rem 2rem; text-align: center; }
.video-play-btn { display: flex; flex-direction: column; align-items: center; gap: 10px; background: none; border: none; color: #fff; cursor: pointer; font-family: inherit; }
.video-play-btn:hover { opacity: 0.85; }
.video-play-btn span { font-size: 14px; font-weight: 500; }
.video-yt-link { color: rgba(255,255,255,0.6); font-size: 12px; display: inline-flex; align-items: center; gap: 4px; }
.video-yt-link:hover { color: #fff; }
.video-iframe-active iframe { width: 100%; aspect-ratio: 16/9; display: block; }

/* Floating YouTube player */
.floating-player { position: fixed; bottom: 20px; right: 20px; width: 300px; background: #0f0f0f; border-radius: var(--radius); box-shadow: var(--shadow-md); z-index: 200; overflow: hidden; }
.floating-player.hidden { display: none; }
.floating-player__header { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; background: #1a1a1a; }
.floating-player__title { color: rgba(255,255,255,0.8); font-size: 12px; font-weight: 500; }
.floating-player__controls { display: flex; align-items: center; gap: 8px; }
.floating-player__yt { color: rgba(255,255,255,0.5); font-size: 11px; display: flex; align-items: center; gap: 3px; }
.floating-player__yt:hover { color: #fff; text-decoration: none; }
.floating-player__close { background: none; border: none; color: rgba(255,255,255,0.5); cursor: pointer; font-size: 14px; padding: 0; line-height: 1; }
.floating-player__close:hover { color: #fff; }
.floating-player__iframe-wrap { padding-bottom: 56.25%; position: relative; }
.floating-player__iframe-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; }

/* Toast notifikace */
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(100px); background: var(--color-text); color: #fff; padding: 10px 20px; border-radius: var(--radius); font-size: 13px; z-index: 300; transition: transform 0.3s ease; pointer-events: none; }
.toast.visible { transform: translateX(-50%) translateY(0); }

/* Help modal */
.help-modal { position: fixed; inset: 0; z-index: 250; display: flex; align-items: center; justify-content: center; }
.help-modal.hidden { display: none; }
.help-modal__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.4); }
.help-modal__box { position: relative; background: var(--color-surface); border-radius: var(--radius); padding: 1.5rem; min-width: 280px; box-shadow: var(--shadow-md); }
.help-modal__header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.help-modal__header h3 { font-size: 15px; font-weight: 600; }
.help-modal__close { background: none; border: none; font-size: 16px; cursor: pointer; color: var(--color-muted); }
.shortcut-table { width: 100%; border-collapse: collapse; }
.shortcut-table td { padding: 6px 8px; font-size: 13px; }
.shortcut-table td:first-child { width: 45%; }
kbd { display: inline-block; padding: 2px 6px; background: var(--color-bg-alt); border: 1px solid var(--color-border); border-radius: 4px; font-family: var(--font-mono); font-size: 11px; }

/* Login */
.login-box { width: 100%; max-width: 380px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 2rem; }
.login-logo { display: flex; align-items: center; gap: 8px; margin-bottom: 1.5rem; font-weight: 600; color: var(--color-text); }
.login-logo svg { color: var(--color-accent); }
.login-box h1 { font-size: 1.25rem; margin-bottom: 1.25rem; }
.login-form { display: flex; flex-direction: column; gap: 14px; }

/* Formuláře */
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 13px; font-weight: 500; color: var(--color-text-secondary); }
.form-group input, .form-group textarea, .form-group select { padding: 8px 10px; border: 1px solid var(--color-border-strong); border-radius: var(--radius-sm); font-family: inherit; font-size: 14px; background: var(--color-surface); color: var(--color-text); width: 100%; }
.form-group input:focus, .form-group textarea:focus { outline: 2px solid var(--color-accent); outline-offset: -1px; border-color: transparent; }
.chord-textarea { font-family: var(--font-mono); font-size: 13px; resize: vertical; }
.form-hint { color: var(--color-muted); font-size: 12px; }
.form-hint-inline { color: var(--color-muted); font-size: 11px; font-weight: 400; }
.form-actions { display: flex; gap: 10px; align-items: center; padding-top: 1rem; border-top: 1px solid var(--color-border); margin-top: 1.5rem; }
small { color: var(--color-muted); font-size: 12px; }
.alert { padding: 10px 14px; border-radius: var(--radius-sm); font-size: 13px; margin-bottom: 1rem; }
.alert--error { background: #fef2f2; border: 1px solid #fecaca; color: var(--color-danger); }

/* === MOBILE === */
@media (max-width: 640px) {
  .site-header .container { height: 50px; }
  .site-logo span { display: none; }

  /* Kontrolní panel — sticky dole na mobilu */
  .control-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    top: auto;
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-bottom: none;
    padding: 8px 12px;
    gap: 4px;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  .ctrl-group { flex-shrink: 0; }
  .ctrl-label { display: none; }
  .ctrl-group + .ctrl-group { padding-left: 6px; }

  .page-song { padding-bottom: 100px; }
  .song-title { font-size: 1.3rem; }
  .version-tabs { gap: 6px; }
  .version-tab { font-size: 12px; padding: 5px 10px; }

  /* Floating player menší */
  .floating-player { width: calc(100vw - 40px); right: 20px; }
}