/* ==========================================
   CANCIONERO PRO - STYLES
   ========================================== */

/* --- BASE & RESET --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg-main:         #0d0f14;
    --bg-surface:      #161923;
    --bg-elevated:     #1e2330;
    --bg-card:         #1e2330;
    --border-color:    #2a3045;
    --text-primary:    #e8ebf0;
    --text-secondary:  #8892a4;
    --text-muted:      #566174;
    --accent-primary:  #6c8ef5;
    --accent-purple:   #a78bfa;
    --accent-green:    #34d399;
    --accent-red:      #f87171;
    --chord-color:     #6c8ef5;
    --chord-bg:        rgba(108, 142, 245, 0.15);
    --font-main:       'Inter', sans-serif;
    --font-mono:       'Fira Code', 'Courier New', monospace;
    --radius-sm:       6px;
    --radius-md:       10px;
    --radius-lg:       16px;
    --shadow-sm:       0 2px 8px rgba(0,0,0,0.3);
    --shadow-md:       0 8px 24px rgba(0,0,0,0.4);
    --shadow-lg:       0 16px 48px rgba(0,0,0,0.6);
    --transition:      0.18s ease;
    /* Typography — controlled by JS */
    --font-size-lyrics: 1.1rem;
    --line-height-lyrics: 1.6;
    --song-columns: 1;
}

html { scroll-behavior: smooth; }
body {
    font-family: var(--font-main);
    background: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* --- LAYOUT --- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* --- HEADER --- */
.app-header {
    background: rgba(22, 25, 35, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: 0; z-index: 200;
    padding: 10px 0;
}
.app-header .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; }

.logo { display: flex; align-items: center; gap: 10px; font-size: 1.1rem; font-weight: 700; color: var(--accent-primary); text-decoration: none; }
.logo svg { color: var(--accent-primary); }

.header-actions { display: flex; align-items: center; gap: 8px; }

/* --- BUTTONS --- */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 18px; border-radius: var(--radius-sm);
    font-size: 0.88rem; font-weight: 600; font-family: var(--font-main);
    cursor: pointer; border: none; transition: var(--transition);
    white-space: nowrap;
}
.btn-primary { background: var(--accent-primary); color: #fff; }
.btn-primary:hover { background: #8aaaf8; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(108,142,245,0.4); }
.btn-outline { background: transparent; color: var(--text-secondary); border: 1px solid var(--border-color); }
.btn-outline:hover { color: var(--text-primary); border-color: var(--accent-primary); }
.btn-outline.active, .btn-outline:focus.active { background: var(--accent-primary); color: #fff; border-color: var(--accent-primary); }
.btn-icon { background: transparent; color: var(--text-secondary); border: 1px solid var(--border-color); padding: 8px 10px; }
.btn-icon:hover { color: var(--text-primary); border-color: var(--accent-primary); }
.btn-danger { background: var(--accent-red); color: #fff; font-size: 0.8rem; padding: 6px 12px;}
.btn-danger:hover { opacity: 0.85; }

/* --- SECTIONS --- */
.app-content { padding-top: 28px; padding-bottom: 100px; }
.mode-section { display: none; }
.mode-section.active { display: block; animation: fadeIn 0.2s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* --- LIBRARY --- */
.library-header {
    display: flex; align-items: flex-start; justify-content: space-between;
    margin-bottom: 28px; gap: 16px; flex-wrap: wrap;
}
.library-header h1 { font-size: 1.8rem; font-weight: 700; }
.library-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
}
.song-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
    display: flex; flex-direction: column;
}
.song-card:hover { transform: translateY(-4px); border-color: var(--accent-primary); box-shadow: 0 8px 32px rgba(108,142,245,0.2); }
.song-card-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 4px; }
.song-card-artist { color: var(--text-secondary); font-size: 0.88rem; flex: 1; }
.song-card-meta { margin-top: 6px; font-size: 0.78rem; color: var(--text-muted); }
.song-card-actions { margin-top: 16px; display: flex; gap: 8px; justify-content: flex-end; }
.empty-library { grid-column: 1/-1; text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-library .empty-icon { font-size: 3.5rem; display: block; margin-bottom: 14px; }

/* --- EDITOR --- */
.editor-grid { display: flex; flex-direction: column; gap: 0; }
.editor-main { display: flex; flex-direction: column; gap: 12px; }
.form-group { display: flex; flex-direction: column; }
.form-group.flex-fill { flex: 1; min-height: 380px; }
.form-group.flex-fill textarea { flex: 1; min-height: 380px; resize: vertical; }

input[type="text"], textarea, select {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-main);
    padding: 12px 16px;
    font-size: 0.95rem;
    width: 100%;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}
input[type="text"]:focus, textarea:focus, select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(108,142,245,0.15);
}
.input-lg { font-size: 1.4rem; font-weight: 700; padding: 16px 20px; }
textarea { font-family: var(--font-mono); font-size: 0.95rem; line-height: 1.7; }
select option { background: var(--bg-elevated); color: var(--text-primary); }

.editor-hints {
    background: rgba(108,142,245,0.08);
    border: 1px solid rgba(108,142,245,0.2);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5;
}
.editor-hints code { background: rgba(108,142,245,0.2); padding: 1px 6px; border-radius: 4px; color: var(--accent-primary); font-family: var(--font-mono); font-size: 0.85em; }
.editor-footer { display: flex; justify-content: flex-end; padding-top: 6px; }
.save-indicator { font-size: 0.8rem; color: var(--text-muted); font-style: italic; }

/* --- VIEWER CONTROLS BAR --- */
.viewer-controls-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 20px;
    align-items: center;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 14px 20px;
    margin-bottom: 24px;
}
.ctrl-group { display: flex; flex-direction: column; gap: 4px; min-width: 80px; }
.ctrl-group label { font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.8px; color: var(--text-muted); }
.ctrl-group select { padding: 6px 10px; font-size: 0.85rem; border-radius: var(--radius-sm); }
.ctrl-divider { width: 1px; background: var(--border-color); height: 40px; align-self: center; margin: 0 4px; }
.text-accent { color: var(--accent-primary); font-size: 0.95rem; }

/* Stepper */
.stepper { display: flex; align-items: center; gap: 6px; }
.step-btn {
    background: var(--bg-elevated); border: 1px solid var(--border-color); color: var(--text-primary);
    border-radius: var(--radius-sm); cursor: pointer; padding: 4px 10px; font-size: 0.82rem; font-weight: 700;
    transition: var(--transition); font-family: var(--font-mono);
}
.step-btn:hover { background: var(--accent-primary); color: #fff; border-color: var(--accent-primary); }
.stepper span { font-family: var(--font-mono); font-size: 0.88rem; min-width: 26px; text-align: center; color: var(--accent-primary); font-weight: 700; }

/* Column picker */
.col-picker { display: flex; gap: 4px; }
.col-btn {
    background: var(--bg-elevated); border: 1px solid var(--border-color);
    color: var(--text-secondary); border-radius: var(--radius-sm);
    padding: 4px 12px; cursor: pointer; font-size: 0.85rem; font-weight: 600;
    transition: var(--transition);
}
.col-btn:hover { border-color: var(--accent-primary); color: var(--text-primary); }
.col-btn.active { background: var(--accent-primary); color: #fff; border-color: var(--accent-primary); }

/* --- VIEWER SONG HEADER --- */
.viewer-song-header { margin-bottom: 20px; }
.viewer-song-header h1 { font-size: 2rem; font-weight: 800; }
.viewer-song-header h2 { font-size: 1rem; color: var(--text-secondary); font-weight: 400; }

/* --- DIAGRAM STRIP --- */
.diagram-strip {
    display: flex; flex-wrap: wrap; gap: 16px;
    margin-bottom: 24px; padding: 16px;
    background: var(--bg-surface); border: 1px solid var(--border-color);
    border-radius: var(--radius-lg); min-height: 10px;
}
.diagram-strip:empty { display: none; }
.diagram-item { display: flex; flex-direction: column; align-items: center; gap: 4px; cursor: pointer; }
.diagram-item:hover svg { opacity: 0.8; }
.diagram-item svg { height: 100px; width: auto; /* Larger chord diagrams */ }
.diagram-item-label { font-size: 0.9rem; color: var(--text-secondary); font-family: var(--font-mono); font-weight: 600; }

/* --- RENDERED SONG --- */
#viewer-content-wrapper { }
#rendered-song {
    font-family: var(--font-mono);
    font-size: var(--font-size-lyrics, 1.1rem);
    line-height: var(--line-height-lyrics, 1.6);
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text-primary);
    column-count: var(--song-columns, 1);
    column-gap: 40px;
    column-rule: 1px solid var(--border-color);
}

.chord-line { display: block; color: var(--accent-purple); font-weight: 600; }
.lyric-line { display: block; }
.section-line { display: block; color: var(--accent-green); font-weight: 700; margin-top: 0.8em; }

.chord {
    color: var(--chord-color);
    background: var(--chord-bg);
    border-radius: 3px;
    padding: 0 3px;
    cursor: pointer;
    font-weight: 700;
    transition: background 0.15s;
}
.chord:hover { background: rgba(108,142,245,0.35); }

/* --- CHORD POPOVER --- */
.chord-popover {
    position: absolute;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    display: none;
    transform: translate(-50%, calc(-100% - 12px));
}
.chord-popover.visible { display: block; }
.chord-popover svg { display: block; height: 140px; width: auto; /* Extra large for popovers */ }

/* --- YOUTUBE PIP --- */
.youtube-pip {
    position: fixed;
    bottom: 24px; right: 24px;
    width: 340px;
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    z-index: 500;
    resize: both;
    min-width: 200px; min-height: 150px;
}
.pip-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 14px;
    background: var(--bg-elevated);
    cursor: move;
}
.pip-title { font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); }
.pip-close-btn {
    background: none; border: none; color: var(--text-muted); cursor: pointer;
    font-size: 1rem; line-height: 1; padding: 0 4px;
    transition: color var(--transition);
}
.pip-close-btn:hover { color: var(--accent-red); }
.pip-body { position: relative; width: 100%; padding-bottom: 56.25%; }
#youtube-iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

/* --- UTILITY --- */
.text-muted { color: var(--text-muted); font-size: 0.88rem; }

/* =================================
   PRINT STYLES
   ================================= */
@media print {
    .app-header, .viewer-controls-bar, .diagram-strip,
    .youtube-pip, .chord-popover, #btn-print { display: none !important; }
    body { background: #fff; color: #000; }
    .mode-section { display: block !important; }
    #editor-section, #library-section { display: none !important; }
    #viewer-section { display: block !important; }
    #rendered-song { font-size: 10pt; color: #000; column-count: var(--song-columns, 1); }
    .chord { color: #333; background: none; font-weight: bold; }
    .chord-line { color: #333; }
    .viewer-song-header h1 { font-size: 16pt; color: #000; }
    .viewer-song-header h2 { font-size: 11pt; color: #444; }
}

/* =================================
   RESPONSIVE
   ================================= */
@media (max-width: 768px) {
    .header-actions .btn span { display: none; }
    .viewer-controls-bar { gap: 10px; }
    .ctrl-divider { display: none; }
    .youtube-pip { width: 260px; right: 12px; bottom: 12px; }
    #rendered-song { column-count: 1 !important; }
    .library-grid { grid-template-columns: 1fr; }
}

/* --- LOGIN MODAL --- */
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(13, 15, 20, 0.85);
    backdrop-filter: blur(8px);
    z-index: 9999;
    display: none;
    align-items: center; justify-content: center;
}
.modal-overlay.visible { display: flex; animation: fadeIn 0.3s ease; }
.login-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px; width: 100%; max-width: 400px;
    box-shadow: var(--shadow-lg);
}
.login-card h2 { margin-bottom: 20px; text-align: center; font-weight: 700; color: var(--accent-primary); }
.login-card .form-group { margin-bottom: 16px; }
.login-card input { background: var(--bg-main); border: 1px solid var(--border-color); padding: 12px; font-size: 1rem; width: 100%; border-radius: var(--radius-sm); color: #fff;}
.login-card button { width: 100%; padding: 14px; font-size: 1rem; margin-top: 10px; }
.login-error { color: var(--accent-red); font-size: 0.85rem; text-align: center; margin-bottom: 10px; display: none; }