@font-face {
    font-family: 'DejaVu Sans';
    src: url('../fonts/DejaVuSans.ttf') format('truetype');
    font-weight: normal;
}
@font-face {
    font-family: 'DejaVu Sans';
    src: url('../fonts/DejaVuSans-Bold.ttf') format('truetype');
    font-weight: bold;
}

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

:root {
    --bg-dark: #1d2021;
    --bg: #282828;
    --bg-light: #32302f;
    --bg-button: #3c3836;
    --bg-hover: #504945;
    --border: #504945;
    --border-dim: #3c3836;
    --text: #ebdbb2;
    --text-dim: #a89984;
    --text-muted: #665c54;
    --accent: #fabd2f;
    --accent-dark: #d79921;
    --blue: #458588;
    --red: #fb4934;
    --purple: #b16286;

    --tab-height: 52px;
    --safe-bottom: env(safe-area-inset-bottom, 0px);

    touch-action: manipulation;
}

html, body {
    height: 100%;
    overflow: hidden;
    font-family: 'DejaVu Sans', system-ui, -apple-system, sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    -webkit-tap-highlight-color: transparent;
    -webkit-text-size-adjust: 100%;
}

/* --- Metronome bar --- */
#metronome-bar {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 6px 12px;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

#metronome-row-1,
#metronome-row-2 {
    display: flex;
    align-items: center;
    gap: 8px;
}

#metronome-tap {
    flex: 0 0 auto;
    padding: 10px 20px;
    background: var(--bg-button);
    color: var(--text);
    border: 2px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    transition: background 0.08s, border-color 0.08s;
}

#metronome-tap:active {
    background: var(--bg-hover);
}

#metronome-tap.blink {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
}

#metronome-bpm {
    flex: 1;
    text-align: center;
    font-size: 16px;
    font-weight: bold;
    color: var(--text-dim);
}

#play-mode-btn {
    flex: 0 0 auto;
    padding: 8px 10px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 10px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    white-space: nowrap;
}

#play-mode-btn:active {
    background: var(--bg-hover);
}

#stagger-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 10px;
    font-weight: bold;
    color: var(--text-dim);
    white-space: nowrap;
}

#stagger-ms {
    width: 52px;
    padding: 6px 4px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    text-align: center;
    -moz-appearance: textfield;
}

#stagger-ms::-webkit-inner-spin-button,
#stagger-ms::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

#beats-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 10px;
    font-weight: bold;
    color: var(--text-dim);
    white-space: nowrap;
}

#beats-per-chord {
    width: 40px;
    padding: 6px 4px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    text-align: center;
    -moz-appearance: textfield;
}

#beats-per-chord::-webkit-inner-spin-button,
#beats-per-chord::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

#npb-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 10px;
    font-weight: bold;
    color: var(--text-dim);
    white-space: nowrap;
}

#notes-per-beat {
    width: 40px;
    padding: 6px 4px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    text-align: center;
    -moz-appearance: textfield;
}

#notes-per-beat::-webkit-inner-spin-button,
#notes-per-beat::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

#metronome-stop {
    flex: 0 0 auto;
    padding: 10px 16px;
    background: var(--bg-button);
    color: var(--text-dim);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

#metronome-stop:active {
    background: var(--bg-hover);
}

/* --- Step sequencer --- */
#step-sequencer {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    padding: 2px 0;
}

.seq-step {
    width: 28px;
    height: 28px;
    border: 2px solid var(--border);
    border-radius: 4px;
    background: var(--bg-button);
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    transition: background 0.06s, border-color 0.06s;
    flex-shrink: 0;
}

.seq-step.downbeat {
    border-color: var(--accent-dark);
}

.seq-step.enabled {
    background: var(--text);
}

.seq-step.enabled.downbeat {
    background: var(--accent);
}

.seq-step.active {
    border-color: var(--red);
    box-shadow: 0 0 4px var(--red);
}

.seq-row {
    display: flex;
    gap: 3px;
    width: 100%;
}

/* --- App shell --- */
#app {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg);
}

#panel-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}

.panel {
    display: none;
    padding: 12px;
    min-height: 100%;
}

.panel.active {
    display: block;
}

/* --- Bottom tab bar (phone-style) --- */
#tabbar {
    display: flex;
    flex-shrink: 0;
    height: var(--tab-height);
    padding-bottom: var(--safe-bottom);
    background: var(--bg-dark);
    border-top: 1px solid var(--border);
}

.tab {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-dim);
    font-family: inherit;
    font-size: 11px;
    font-weight: bold;
    letter-spacing: 0.5px;
    cursor: pointer;
    padding: 8px 2px;
    transition: color 0.15s, background 0.15s;
}

.tab:active {
    background: var(--bg-button);
}

.tab.active {
    color: var(--accent);
}

/* --- Panel titles --- */
.panel-title {
    font-size: 12px;
    font-weight: bold;
    color: var(--accent);
    margin-bottom: 8px;
    padding-bottom: 4px;
}

/* --- Section --- */
.chord-section {
    display: flex;
    flex-wrap: wrap;
    padding: 6px 0;
    border-bottom: 1px solid var(--border-dim);
    gap: 6px;
}

.chord-section:last-child {
    border-bottom: none;
}

/* --- Section label --- */
.section-label {
    font-size: 11px;
    color: var(--text-dim);
    margin-bottom: 2px;
    width: 100%;
    flex-shrink: 0;
}

/* --- Buttons --- */
.chord-btn {
    min-width: 60px;
    flex: 1 1 60px;
    max-width: 100px;
    padding: 10px 6px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: background 0.1s;
    user-select: none;
    -webkit-user-select: none;
}

.chord-btn:active {
    background: var(--bg-hover);
}

.chord-btn.staged {
    background: var(--accent-dark);
    color: var(--bg);
    border-color: var(--accent);
}

.chord-btn.playing {
    background: var(--blue);
    color: var(--text);
    border-color: var(--blue);
}

.chord-btn.disabled {
    background: var(--bg-light);
    color: var(--text-muted);
    border-color: var(--border-dim);
    cursor: default;
    pointer-events: none;
}

.chord-btn.cursor-btn {
    background: var(--bg-light);
    color: var(--text-muted);
    border-color: var(--border-dim);
}

/* --- Full-width action buttons (Next / Add) --- */
.chord-btn.action-btn {
    flex: 1 1 100%;
    max-width: none;
    min-width: 0;
    padding: 12px;
    font-size: 15px;
}

/* --- Progression picks row --- */
#progression-picks {
    min-height: 50px;
    align-content: flex-start;
}

.progression-pick {
    min-width: 60px;
    flex: 1 1 60px;
    max-width: 100px;
    padding: 10px 6px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    transition: background 0.1s;
}

.progression-pick:active {
    background: var(--bg-hover);
}

/* --- Footer buttons --- */
.progression-footer {
    display: flex;
    gap: 6px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-dim);
}

.prog-footer-btn {
    flex: 1;
    padding: 10px 6px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

.prog-footer-btn:active {
    background: var(--bg-hover);
}

.prog-footer-btn.reset-pending {
    animation: reset-blink 0.4s ease-in-out infinite;
}

@keyframes reset-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.2; }
}

/* --- Progression root/quality/related buttons (bigger, static size) --- */
.prog-pick-btn {
    min-width: 0;
    flex: 1 1 calc(25% - 5px);
    max-width: calc(25% - 5px);
    padding: 14px 6px;
    font-size: 16px;
}

/* Cap button sections to 4 buttons per row */
.prog-btn-section {
    max-width: 100%;
}

/* --- Mode toggle button (inline in section label) --- */
.mode-toggle {
    display: inline-block;
    padding: 2px 10px;
    margin-left: 8px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 10px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    vertical-align: middle;
}

.mode-toggle.mode-delete {
    background: var(--red);
    color: var(--bg);
    border-color: var(--red);
}

.mode-toggle.mode-play {
    background: var(--blue);
    color: var(--text);
    border-color: var(--blue);
}

.mode-toggle.mode-acc {
    background: var(--bg-button);
    color: var(--text);
    border-color: var(--border);
}

/* --- Save/Load UI --- */
.save-row {
    display: flex;
    gap: 6px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-dim);
}

.save-input {
    flex: 1;
    padding: 10px 8px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    outline: none;
}

.save-input:focus {
    border-color: var(--accent);
}

.save-confirm-btn {
    flex: 0 0 auto;
    min-width: 48px;
    background: var(--accent-dark);
    color: var(--bg);
    border-color: var(--accent);
}

.save-cancel-btn {
    flex: 0 0 auto;
    min-width: 48px;
}

.saved-prog-btn {
    flex: 1 1 calc(75% - 5px) !important;
    max-width: calc(75% - 5px) !important;
}

.saved-del-btn {
    flex: 0 0 calc(25% - 5px);
    max-width: calc(25% - 5px);
    min-width: 0;
    padding: 14px 6px;
    font-size: 18px;
    color: var(--red);
    border-color: var(--border-dim);
}

/* --- Drag placeholders and ghosts --- */
.chord-btn-placeholder,
.pick-placeholder {
    background: var(--bg-dark) !important;
    color: var(--bg-dark) !important;
    border: 1px dashed var(--text-muted) !important;
    opacity: 0.5;
}

.drag-ghost {
    position: fixed;
    z-index: 1000;
    background: var(--bg-hover);
    color: var(--text);
    border: 2px solid var(--accent);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    text-align: center;
    padding: 10px 6px;
    pointer-events: none;
    opacity: 0.92;
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

/* --- Accidentals row --- */
.accidentals {
    gap: 6px;
}

.accidentals .chord-btn {
    min-width: 48px;
    flex: 1 1 48px;
}

/* --- Color scheme panel --- */
.color-schemes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.scheme-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 8px;
    background: var(--bg-button);
    border: 2px solid var(--border-dim);
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: 11px;
    font-weight: bold;
    color: var(--text-dim);
}

.scheme-btn.active {
    border-color: var(--accent);
    color: var(--accent);
}

.scheme-preview {
    display: flex;
    gap: 4px;
}

.scheme-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
}

/* --- Canvas panels (spectrum/waveform) --- */
.render-canvas {
    width: 100%;
    height: 300px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 6px;
    display: block;
}

/* --- Responsive: larger screens --- */
@media (min-width: 601px) {
    #app {
        max-width: 900px;
    }

    .chord-btn {
        min-width: 72px;
        flex: 0 1 72px;
    }

    .prog-pick-btn {
        min-width: 0;
        flex: 1 1 calc(25% - 5px);
        max-width: calc(25% - 5px);
        padding: 16px 6px;
        font-size: 17px;
    }

    .prog-btn-section {
        max-width: 100%;
    }

    .progression-pick {
        min-width: 72px;
        flex: 0 1 72px;
    }

    .tab {
        font-size: 13px;
    }
}

/* --- Landscape tweaks --- */
@media (orientation: landscape) {
    #app {
        max-width: 50%;
    }
}

@media (orientation: landscape) and (max-height: 500px) {
    :root {
        --tab-height: 40px;
    }

    .panel {
        padding: 8px;
    }

    .chord-btn, .progression-pick, .prog-footer-btn {
        padding: 6px 4px;
        font-size: 12px;
    }

    .prog-pick-btn {
        min-width: 0;
        flex: 1 1 calc(25% - 5px);
        max-width: calc(25% - 5px);
        padding: 8px 4px;
        font-size: 13px;
    }

    .prog-btn-section {
        max-width: 100%;
    }

    .render-canvas {
        height: 200px;
    }
}