/* ── Fonts ── */
@font-face {
    font-family: 'PrintChar21';
    src: url('pr/PrintChar21.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}
@font-face {
    font-family: 'PRNumber3';
    src: url('pr/PRNumber3.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

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

/* Light, easy-on-eyes blue palette */
:root {
    /* TWEAK: pattern strip height cap (timeline + tabs) */
    --composition-max-height: 42vh;
    --b:   rgb(140, 210, 255);      /* main text — soft sky blue */
    --b80: rgba(140, 210, 255, 0.8);
    --b60: rgba(140, 210, 255, 0.6);
    --b40: rgba(140, 210, 255, 0.4);
    --b20: rgba(140, 210, 255, 0.2);
    --b10: rgba(140, 210, 255, 0.10);
    --b05: rgba(140, 210, 255, 0.05);
    --accent: rgb(255, 220, 80);    /* yellow for values */
}

body, html {
    height: 100%;
    margin: 0;
    padding: 0;
    background-color: #04080f;
    color: var(--b);
    font-family: 'PrintChar21', 'Courier New', monospace;
    font-size: 13px;
    overflow: hidden;
}

/* CRT scanline overlay */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.12) 2px,
        rgba(0, 0, 0, 0.12) 4px
    );
    pointer-events: none;
    z-index: 9999;
}

/* ── App shell ── */
#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    border: 1px solid var(--b20);
}

/* ── Header ── */
#header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 7px 16px;
    border-bottom: 1px solid var(--b40);
    background: var(--b10);
    flex-shrink: 0;
}

#title {
    font-size: 16px;
    letter-spacing: 3px;
    color: var(--b);
    text-shadow: 0 0 10px rgba(140, 210, 255, 0.5);
}

#status-bar {
    font-size: 12px;
    color: var(--b60);
    letter-spacing: 2px;
}

/* ── Composition / pattern timeline ── */
#composition {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    border-bottom: 1px solid var(--b20);
    background: rgba(4, 12, 22, 0.85);
    max-height: var(--composition-max-height);
    min-height: 0;
}

#composition-tabs {
    display: flex;
    gap: 0;
    padding: 0 10px;
    border-bottom: 1px solid var(--b10);
    background: var(--b05);
}

.comp-tab {
    position: relative;
    background: transparent;
    border: 1px solid transparent;
    border-bottom: none;
    color: var(--b60);
    font-family: inherit;
    font-size: 11px;
    letter-spacing: 2px;
    padding: 8px 18px;
    cursor: default;
    margin-bottom: -1px;
}

.comp-tab.active {
    color: var(--b);
    background: rgba(4, 8, 15, 0.95);
    border-color: var(--b20);
    border-radius: 4px 4px 0 0;
    text-shadow: 0 0 8px rgba(140, 210, 255, 0.4);
}

#composition-panel {
    display: flex;
    flex-direction: column;
    min-height: 0;
    flex: 1;
}

#timeline-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border-bottom: 1px solid var(--b10);
}

.timeline-btn {
    background: transparent;
    border: 1px solid var(--b20);
    color: var(--b80);
    font-family: inherit;
    font-size: 10px;
    letter-spacing: 1px;
    padding: 6px 10px;
    cursor: pointer;
    transition: background 0.1s, border-color 0.1s;
}

.timeline-btn:hover:not(:disabled) {
    background: var(--b10);
    border-color: var(--b60);
    color: var(--b);
}

.timeline-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.timeline-btn-accent {
    border-color: rgb(120, 200, 160);
    color: rgb(140, 220, 180);
}

.timeline-btn-accent:hover:not(:disabled) {
    background: rgba(120, 200, 160, 0.12);
}

.timeline-btn-small {
    padding: 6px 8px;
    min-width: 36px;
}

.timeline-toolbar-sep {
    width: 1px;
    height: 18px;
    background: var(--b20);
    margin: 0 4px;
}

.timeline-loop-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin: 0 2px 0 0;
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--b60);
    cursor: pointer;
    user-select: none;
}

.timeline-loop-label input {
    accent-color: rgb(120, 200, 160);
    width: 14px;
    height: 14px;
    cursor: pointer;
}

.timeline-loop-label:hover {
    color: var(--b80);
}

#global-detune-row {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 12px 16px;
    padding: 8px 12px 10px;
    border-bottom: 1px solid var(--b10);
    background: rgba(0, 0, 0, 0.2);
    overflow-x: auto;
}

.global-detune-label {
    font-size: 10px;
    letter-spacing: 3px;
    color: var(--b40);
    min-width: 48px;
    flex-shrink: 0;
}

.detune-groups {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 14px 22px;
    flex: 1;
    min-width: 0;
}

.detune-group {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 6px 8px;
    flex-shrink: 0;
}

.detune-group-cycles .detune-axis-label {
    margin-right: 6px;
    padding-right: 10px;
}

.detune-sep {
    color: var(--b40);
    font-size: 12px;
    padding: 0 4px;
    flex-shrink: 0;
    user-select: none;
}

.detune-axis-label {
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--b60);
    width: 44px;
    flex-shrink: 0;
}

.detune-sq-btn {
    width: 30px;
    height: 30px;
    padding: 0;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--b40);
    color: var(--b80);
    font-family: inherit;
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    transition: background 0.1s, border-color 0.1s;
}

.detune-sq-btn:hover {
    background: var(--b10);
    border-color: var(--b);
    color: var(--b);
}

.detune-value {
    min-width: 44px;
    text-align: center;
    font-size: 12px;
    letter-spacing: 0.5px;
    color: var(--accent);
}

#global-character-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 18px;
    padding: 8px 12px 10px;
    border-bottom: 1px solid var(--b10);
    background: rgba(0, 0, 0, 0.15);
}

.global-character-label {
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--b40);
    min-width: 52px;
    flex-shrink: 0;
}

.character-sliders {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px 28px;
    flex: 1;
    min-width: 0;
}

.character-slider-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 200px;
    max-width: 420px;
}

.character-slider-label {
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--b60);
    width: 58px;
    flex-shrink: 0;
}

#global-character-row input[type="range"] {
    flex: 1;
    min-width: 80px;
}

.character-slider-val {
    width: 28px;
    min-width: 28px;
    text-align: right;
    font-size: 12px;
    color: var(--accent);
}

#timeline-row {
    flex: 1;
    min-height: 56px;
    padding: 8px 10px 10px;
    overflow: hidden;
}

#timeline-scroll {
    height: 100%;
    min-height: 48px;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 4px;
}

#timeline-blocks {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    gap: 6px;
    min-height: 44px;
}

.block-chip {
    flex-shrink: 0;
    min-width: 52px;
    height: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4px 8px;
    border: 1px solid var(--b40);
    border-radius: 3px;
    cursor: pointer;
    font-family: inherit;
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--b80);
    background: rgba(140, 210, 255, 0.04);
    transition: border-color 0.1s, box-shadow 0.1s, background 0.1s;
}

.block-chip:hover {
    border-color: var(--b60);
    background: var(--b10);
}

.block-chip.selected {
    border-color: var(--b);
    box-shadow: 0 0 0 1px var(--b40), 0 0 12px rgba(140, 210, 255, 0.25);
    color: var(--b);
    background: rgba(140, 210, 255, 0.1);
}

.block-chip-sound {
    border-style: solid;
}

.block-chip-gap {
    border-style: dashed;
    color: var(--b40);
    background: rgba(0, 0, 0, 0.25);
}

.block-chip-gap.selected {
    color: var(--b60);
}

.block-chip-label {
    font-weight: bold;
    font-size: 11px;
}

.block-chip-meta {
    font-size: 9px;
    color: var(--b40);
    margin-top: 2px;
}

.block-chip.selected .block-chip-meta {
    color: var(--b60);
}

/* ── Main split ── */
#main {
    display: flex;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* ── Left panel ── */
#left-panel {
    width: 520px;
    min-width: 520px;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--b20);
    overflow-y: auto;
    padding: 0;
}

/* ── Right panel ── */
#right-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ── Panel sections ── */
.panel-section {
    padding: 9px 14px;
    border-bottom: 1px solid var(--b10);
}

.section-label {
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--b40);
    margin-bottom: 7px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.section-label-effects {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--b10);
}

/* ── Action bar (top of left panel) ── */
#action-bar {
    display: flex;
    gap: 5px;
    padding: 9px 14px;
    border-bottom: 1px solid var(--b20);
    background: var(--b05);
    flex-shrink: 0;
}

.action-btn {
    flex: 1;
    background: transparent;
    border: 1px solid var(--b40);
    color: var(--b);
    font-family: inherit;
    font-size: 11px;
    letter-spacing: 1px;
    padding: 8px 4px;
    cursor: pointer;
    transition: all 0.1s;
}

.action-btn:hover {
    background: var(--b20);
    border-color: var(--b);
    text-shadow: 0 0 6px rgba(140, 210, 255, 0.6);
}

.play-btn:hover  { border-color: rgb(120, 255, 160); color: rgb(120, 255, 160); }
.stop-btn:hover  { border-color: rgb(255, 110, 110); color: rgb(255, 110, 110); }
.export-btn:hover{ border-color: rgb(255, 220, 80);  color: rgb(255, 220, 80); }

#block-loop-label {
    flex: 0 0 auto;
    padding: 4px 6px;
    border: 1px solid var(--b20);
    align-self: stretch;
    align-items: center;
    gap: 5px;
}
#block-loop-label:has(input:checked) {
    border-color: rgb(120, 200, 160);
    color: rgb(120, 200, 160);
}

/* ── Presets grid ── */
#presets-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5px;
}

.preset-btn {
    background: transparent;
    border: 1px solid var(--b20);
    color: var(--b80);
    font-family: inherit;
    font-size: 11px;
    letter-spacing: 1px;
    padding: 7px 4px;
    cursor: pointer;
    transition: background 0.1s, color 0.1s;
}

.preset-btn:hover, .preset-btn.active {
    background: var(--b20);
    border-color: var(--b);
    color: var(--b);
    text-shadow: 0 0 6px rgba(140, 210, 255, 0.5);
}

.preset-btn:active {
    background: var(--b40);
}

/* ── Control rows ── */
.control-row {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    gap: 10px;
}

.control-row label {
    width: 110px;
    min-width: 110px;
    font-size: 11px;
    letter-spacing: 1px;
    color: var(--b80);
}

.param-hint {
    color: var(--b40);
    font-size: 10px;
}

.slider-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

/* Custom slider */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    flex: 1;
    height: 3px;
    background: var(--b20);
    outline: none;
    border: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: var(--b);
    border: none;
    cursor: pointer;
    box-shadow: 0 0 6px rgba(140, 210, 255, 0.7);
}

input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--b);
    border: none;
    cursor: pointer;
}

.val-display {
    width: 38px;
    min-width: 38px;
    text-align: right;
    font-size: 12px;
    color: var(--accent);
}

/* ── Toggle buttons (sweep group) ── */
.btn-group {
    display: flex;
    gap: 4px;
    flex: 1;
}

.toggle-btn {
    flex: 1;
    background: transparent;
    border: 1px solid var(--b20);
    color: var(--b40);
    font-family: inherit;
    font-size: 10px;
    letter-spacing: 1px;
    padding: 5px 2px;
    cursor: pointer;
    transition: all 0.1s;
}

.toggle-btn.active {
    border-color: var(--b80);
    color: var(--b);
    background: var(--b10);
    text-shadow: 0 0 5px rgba(140, 210, 255, 0.5);
}

.toggle-btn:hover {
    border-color: var(--b60);
    color: var(--b60);
}

/* ── Oscilloscope ── */
#oscilloscope-section {
    padding: 9px 14px;
    border-bottom: 1px solid var(--b10);
    flex-shrink: 0;
}

#oscilloscope {
    width: 100%;
    height: 130px;
    background: #010508;
    display: block;
    border: 1px solid var(--b20);
}

/* ── BASIC view ── */
#basic-section {
    flex: 1;
    padding: 9px 14px;
    border-bottom: 1px solid var(--b10);
    overflow-y: auto;
    min-height: 0;
}

#basic-view {
    margin: 0;
    font-family: inherit;
    font-size: 13px;
    line-height: 1.8;
    white-space: pre;
    color: var(--b80);
    background: transparent;
}

#basic-view .kw   { color: rgb(255, 220, 80); }
#basic-view .addr { color: rgb(190, 140, 255); }
#basic-view .num  { color: rgb(120, 230, 255); }
#basic-view .cmt  { color: var(--b40); font-style: italic; }

/* ── Signal info ── */
#freq-display-section {
    padding: 7px 14px;
    flex-shrink: 0;
}

#freq-display {
    font-size: 12px;
    letter-spacing: 1px;
    color: var(--b60);
}

.info-label {
    color: var(--b40);
    margin-right: 3px;
}

#info-freq, #info-period, #info-duration {
    color: var(--accent);
}

/* ── Scrollbar styling ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--b20); }
::-webkit-scrollbar-thumb:hover { background: var(--b40); }