/* ============================================
   APP HEADER
   ============================================ */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: linear-gradient(to bottom, rgba(6,6,8,0.95) 0%, transparent 100%);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.app-logo {
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.app-logo i {
    color: var(--mode-focus);
    font-size: 1rem;
    transition: color 0.3s;
}

.app-nav-tools {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ============================================
   MODE TABS
   ============================================ */
.mode-tabs {
    display: flex;
    background: rgba(255, 255, 255, 0.025);
    padding: 4px;
    border-radius: var(--radius-full);
    border: 1px solid var(--glass-border);
    gap: 2px;
}

.tab-btn {
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius-full);
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--duration-normal) var(--ease-out);
    white-space: nowrap;
    background: none;
    border: none;
    cursor: pointer;
}

.tab-btn:hover { color: var(--text-secondary); }

.tab-btn.active {
    background: rgba(255, 255, 255, 0.09);
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================
   TIMER VISUAL
   ============================================ */
.timer-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 1rem 2rem;
    gap: 0;
}

.timer-visual {
    position: relative;
    width: min(360px, 80vw);
    height: min(360px, 80vw);
    margin: 1.5rem 0;
}

.ring-svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
    overflow: visible;
}

.ring-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.04);
    stroke-width: 6;
}

.ring-progress {
    fill: none;
    stroke: var(--mode-focus);
    stroke-width: 6;
    stroke-linecap: round;
    stroke-dasharray: 1006;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 0.5s linear, stroke 0.4s ease;
    filter: drop-shadow(0 0 10px var(--mode-focus));
}

.ring-track {
    fill: none;
    stroke: rgba(255, 255, 255, 0.02);
    stroke-width: 6;
}

.timer-text-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 0.25rem;
}

.time-big {
    font-size: clamp(3.5rem, 13vw, 6rem);
    font-weight: 300;
    line-height: 1;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.time-label {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--text-muted);
    font-weight: 500;
}

.streak-text {
    font-size: 0.75rem;
    color: var(--accent-warning);
    font-weight: 600;
    min-height: 1em;
}

/* ============================================
   TIMER CONTROLS
   ============================================ */
.timer-controls {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.btn-control-lg {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--text-primary);
    color: var(--bg-main);
    font-size: 1.3rem;
    transition: transform var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-normal);
    flex-shrink: 0;
    border: none;
    cursor: pointer;
}

.btn-control-lg:hover {
    transform: scale(1.07);
    box-shadow: 0 0 30px rgba(255,255,255,0.2);
}

.btn-control-lg:active { transform: scale(0.97); }

.btn-control-sm {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    border: 1px solid var(--glass-border);
    font-size: 0.9rem;
    transition: all var(--duration-fast);
    cursor: pointer;
}

.btn-control-sm:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.09);
    border-color: var(--glass-border-hover);
}

.btn-control-sm:active { transform: scale(0.94); }

.kbd-hint {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 1.25rem;
    letter-spacing: 0.02em;
}

.kbd-hint kbd {
    display: inline-block;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    padding: 0.15em 0.5em;
    font-family: inherit;
    font-size: 0.75em;
}

/* ============================================
   TASKS PANEL
   ============================================ */
.tasks-panel {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 320px;
    max-height: 420px;
    display: flex;
    flex-direction: column;
    z-index: var(--z-overlay);
    overflow: hidden;
}

.tasks-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
}

.tasks-header h3 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin: 0;
}

.tasks-body {
    padding: 0.75rem;
    overflow-y: auto;
    flex: 1;
}

/* Add Task Input */
.task-input-row {
    display: flex;
    gap: 0.5rem;
    padding: 0 0.75rem 0.75rem;
    border-top: 1px solid var(--glass-border);
    padding-top: 0.75rem;
}

.task-input-row input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: inherit;
    transition: border-color var(--duration-fast);
}

.task-input-row input:focus {
    outline: none;
    border-color: var(--mode-focus);
}

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

.task-submit-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--mode-focus);
    color: var(--bg-main);
    font-size: 0.85rem;
    border: none;
    cursor: pointer;
    transition: opacity var(--duration-fast);
    flex-shrink: 0;
}

.task-submit-btn:hover { opacity: 0.85; }

.task-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.75rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    transition: all var(--duration-fast);
    cursor: pointer;
    margin-bottom: 0.35rem;
}

.task-item:hover {
    background: rgba(255,255,255,0.04);
    border-color: var(--glass-border);
}

.task-item.done .task-text {
    text-decoration: line-through;
    color: var(--text-muted);
}

.task-check {
    width: 18px;
    height: 18px;
    border: 1.5px solid var(--text-muted);
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--duration-fast);
    font-size: 0.65rem;
}

.task-check.completed {
    background: var(--accent-success);
    border-color: var(--accent-success);
    color: var(--bg-main);
}

.task-text {
    flex: 1;
    font-size: 0.875rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.task-empty {
    text-align: center;
    padding: 1.5rem 1rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ============================================
   STATS MODAL CONTENT
   ============================================ */
.stats-overview {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.75rem;
}

.stat-box {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    padding: 1.25rem 0.75rem;
    border-radius: var(--radius-lg);
    text-align: center;
}

.stat-num {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.35rem;
}

.stat-lbl {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
}

/* Goal progress bar */
.goal-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(255,255,255,0.06);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width 0.5s var(--ease-out);
    width: 0%;
}

/* Heatmap */
.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(20, 1fr);
    gap: 3px;
    margin-top: 0.75rem;
    padding: 0.875rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
}

.day-cell {
    aspect-ratio: 1;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.04);
}

.day-cell.l1 { background: rgba(0, 212, 255, 0.25); }
.day-cell.l2 { background: rgba(0, 212, 255, 0.55); }
.day-cell.l3 { background: rgba(0, 212, 255, 0.9); box-shadow: 0 0 5px rgba(0, 212, 255, 0.5); }

.heatmap-legend {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 0.4rem;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.legend-scale { display: flex; gap: 3px; align-items: center; }
.legend-scale span { width: 10px; height: 10px; border-radius: 2px; }
.l0 { background: rgba(255,255,255,0.04); }
.l1 { background: rgba(0,212,255,0.25); }
.l2 { background: rgba(0,212,255,0.55); }
.l3 { background: rgba(0,212,255,0.9); }

/* ============================================
   AUDIO MODAL
   ============================================ */
.audio-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 1rem;
}

.audio-btn {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 1.1rem 0.75rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--duration-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.82rem;
    font-family: inherit;
    font-weight: 500;
}

.audio-btn i { font-size: 1.4rem; }

.audio-btn:hover {
    border-color: var(--glass-border-hover);
    background: var(--bg-card-hover);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.audio-btn.active {
    background: rgba(0, 212, 255, 0.08);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.audio-btn .premium-badge {
    font-size: 0.65rem;
    background: rgba(168,85,247,0.15);
    color: var(--accent-purple);
    border: 1px solid rgba(168,85,247,0.3);
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* ============================================
   SETTINGS PRESETS
   ============================================ */
.preset-grid {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.preset-btn {
    flex: 1;
    padding: 0.6rem 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--duration-fast);
}

.preset-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(0,212,255,0.06);
}

/* ============================================
   MODE-SPECIFIC COLOR OVERRIDES
   ============================================ */
body[data-mode="short"] .ring-progress {
    stroke: var(--mode-short);
    filter: drop-shadow(0 0 10px var(--mode-short));
}
body[data-mode="short"] .tab-btn.active {
    color: var(--mode-short);
    background: rgba(168,85,247,0.1);
}
body[data-mode="short"] .app-logo i { color: var(--mode-short); }
body[data-mode="short"] .btn-control-lg { box-shadow: 0 0 0 0 rgba(168,85,247,0); }

body[data-mode="long"] .ring-progress {
    stroke: var(--mode-long);
    filter: drop-shadow(0 0 10px var(--mode-long));
}
body[data-mode="long"] .tab-btn.active {
    color: var(--mode-long);
    background: rgba(34,211,160,0.1);
}
body[data-mode="long"] .app-logo i { color: var(--mode-long); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .tasks-panel {
        position: relative;
        bottom: auto;
        right: auto;
        width: 100%;
        max-width: 480px;
        margin: 0 auto 2rem;
        max-height: none;
    }

    .stats-overview {
        grid-template-columns: repeat(3, 1fr);
    }

    .heatmap-grid {
        grid-template-columns: repeat(15, 1fr);
    }
}

@media (max-width: 480px) {
    .app-header { padding: 0.875rem 1rem; }

    .timer-visual {
        width: min(280px, 78vw);
        height: min(280px, 78vw);
        margin: 1rem 0;
    }

    .btn-control-lg { width: 64px; height: 64px; font-size: 1.2rem; }
    .btn-control-sm { width: 42px; height: 42px; }

    .mode-tabs { gap: 1px; }
    .tab-btn { padding: 0.45rem 0.85rem; font-size: 0.8rem; }

    .stats-overview { grid-template-columns: 1fr 1fr 1fr; }
    .stat-num { font-size: 1.5rem; }

    .heatmap-grid {
        grid-template-columns: repeat(10, 1fr);
    }

    .audio-grid { grid-template-columns: 1fr 1fr; }
}