*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #0c0c0c;
    --surface: #111111;
    --surface2: #161616;
    --fg: #e0e0e0;
    --dim: #666666;
    --accent: #d4a0b5;
    --err: #ff6666;
    --border: #444444;
}

body {
    font-family: 'Courier New', Courier, 'Liberation Mono', Consolas, Monaco, monospace;
    font-size: 15px;
    font-weight: bold;
    line-height: 1.6;
    background: var(--bg);
    color: var(--fg);
    min-height: 100vh;
    padding: 24px;
}

/* ── CRT Scanlines ── */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 999;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.06) 2px,
        rgba(0, 0, 0, 0.06) 4px
    );
}

.container {
    max-width: 780px;
    margin: 0 auto;
}

/* ── Header ── */
header {
    margin-bottom: 32px;
}

header pre {
    color: var(--accent);
    font-size: 12px;
    font-weight: bold;
    line-height: 1.2;
    margin-bottom: 4px;
}

.tagline {
    color: var(--dim);
    font-size: 12px;
    margin-bottom: 12px;
}

.prompt {
    color: var(--dim);
}

.prompt::before {
    content: '> ';
    color: var(--accent);
}

/* ── Blinking Cursor ── */
.cursor::after {
    content: '_';
    animation: blink 1s step-end infinite;
}

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

/* ── Dividers ── */
.divider {
    border-bottom: 1px solid var(--border);
    margin: 24px 0 16px;
}

/* ── Sections ── */
.section {
    margin-bottom: 20px;
}

.section-title {
    margin-bottom: 12px;
}

.section-title::before {
    content: '> ';
    color: var(--accent);
}

/* ── Upload Zone ── */
.upload-zone {
    border: 1px solid var(--border);
    background: var(--surface);
    padding: 24px;
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--accent);
}

.upload-zone .hint {
    color: var(--dim);
}

.upload-zone input[type="file"] {
    display: none;
}

/* ── Player ── */
#player-section,
#sections-block,
#output-block {
    display: none;
}

.player-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.waveform-wrap {
    position: relative;
    margin-top: 18px;
    cursor: pointer;
}

#waveform-inner {
    position: relative;
    height: 192px;
    overflow-x: auto;
}

.waveform-wrap canvas {
    display: block;
    height: 100%;
}

.waveform-time {
    position: absolute;
    top: -16px;
    right: 6px;
    color: var(--dim);
    font-size: 12px;
    z-index: 2;
}

.playhead-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 1px;
    background: var(--fg);
    pointer-events: none;
    z-index: 1;
}

.playhead-time {
    position: absolute;
    top: -16px;
    left: 0;
    transform: translateX(-50%);
    color: var(--fg);
    font-size: 12px;
    white-space: nowrap;
    background: var(--bg);
    padding: 0 4px;
    pointer-events: none;
    z-index: 2;
}

.player-bar-row {
    display: flex;
    align-items: center;
    margin-top: 4px;
}

.player-btn {
    background: none;
    color: var(--accent);
    border: none;
    padding: 0;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
}

#btn-add-segment.player-btn {
    color: var(--dim);
}

#btn-add-segment.player-btn:hover {
    color: var(--accent);
}

.player-label {
    color: var(--dim);
    font-size: 13px;
    font-weight: bold;
}

/* ── Segments ── */
#segments-container {
    margin-bottom: 10px;
    border: 1px solid var(--border);
    background: var(--surface);
}

.seg-header,
.segment-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
}

.seg-header {
    color: var(--dim);
    font-size: 12px;
    padding-top: 7px;
    padding-bottom: 7px;
}

.seg-header .seg-field {
    justify-content: center;
}

.segment-row:last-child {
    border-bottom: none;
}

.seg-idx {
    color: var(--accent);
    flex-shrink: 0;
    width: 34px;
}

.seg-field {
    display: flex;
    align-items: center;
    gap: 2px;
    width: 96px;
    justify-content: center;
    flex-shrink: 0;
}

.seg-header .seg-field:last-child,
.segment-row .seg-field:last-child {
    margin-left: auto;
}

.seg-start {
    color: var(--fg);
    font-size: 13px;
    white-space: nowrap;
    flex-shrink: 0;
    width: 56px;
    text-align: center;
}

.seg-header .seg-start {
    color: var(--dim);
    font-size: 12px;
}

input.seg-end,
input.seg-speed {
    background: none;
    border-color: transparent;
}

input.seg-end:focus,
input.seg-speed:focus {
    border-color: transparent;
    border-bottom-color: var(--accent);
}

.seg-end-static {
    color: var(--dim);
    font-size: 13px;
}

/* hide native number spinners */
input[type='number']::-webkit-outer-spin-button,
input[type='number']::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type='number'] {
    -moz-appearance: textfield;
    appearance: textfield;
}

.stepper {
    background: none;
    border: none;
    color: var(--dim);
    padding: 0 2px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
    flex-shrink: 0;
}

.stepper:hover {
    color: var(--accent);
}

.stepper:disabled {
    opacity: 0.3;
    cursor: default;
}

/* ── Inputs ── */
input {
    background: var(--surface2);
    color: var(--fg);
    border: 1px solid var(--border);
    padding: 5px 8px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    outline: none;
}

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

input:disabled {
    opacity: 0.4;
}

.seg-field input {
    width: 48px;
    text-align: center;
}

/* ── Buttons ── */
.btn {
    background: var(--surface);
    color: var(--dim);
    border: 1px solid var(--dim);
    padding: 5px 14px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    cursor: pointer;
}

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

.tip {
    color: var(--dim);
    font-size: 12px;
    margin: 4px 0;
}

.seg-notification {
    display: none;
    color: var(--dim);
    font-size: 12px;
    margin-top: 4px;
}

.segment-row.muted {
    opacity: 0.4;
}

.segment-row.muted input {
    color: var(--dim);
}

.segment-row.muted input:disabled,
.segment-row.muted .stepper:disabled {
    opacity: 1;
}

.seg-merge-divider {
    display: flex;
    padding: 3px 14px;
}

.btn-merge {
    background: none;
    color: var(--dim);
    border: none;
    padding: 0;
    font-family: inherit;
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
}

.btn-merge:hover {
    color: var(--accent);
}

.btn-export {
    display: inline-block;
    color: var(--accent);
    border: none;
    font-size: 13px;
    padding: 10px 32px;
    margin-top: 12px;
}

.btn-export:hover {
    background: #1f1419;
}

.btn-export:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-export:disabled:hover {
    background: var(--surface);
}

/* ── Output ── */
.output-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.output-label {
    color: var(--dim);
}

#predicted-duration-text {
    color: var(--fg);
}

/* ── Status Banner ── */
#status-banner {
    display: none;
    margin-top: 14px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    background: var(--surface);
    font-size: 13px;
}

#status-banner a {
    color: var(--accent);
}

#status-banner.ok,
#status-banner.proc {
    color: var(--accent);
    border-color: var(--accent);
}

#status-banner.fail {
    color: var(--err);
    border-color: var(--err);
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--dim); }