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

:root {
    --zinc-950:  #09090b;
    --zinc-900:  #18181b;
    --zinc-800:  #27272a;
    --zinc-700:  #3f3f46;
    --zinc-500:  #71717a;
    --zinc-400:  #a1a1aa;
    --zinc-100:  #f4f4f5;
    --emerald-600: #059669;
    --emerald-500: #10b981;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-full: 9999px;
}

body {
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    background-color: var(--zinc-950);
    color: var(--zinc-100);
    display: flex;
    flex-direction: column;
}

/* ── Layout ───────────────────────────────────────────── */
main {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* ── Sidebar ──────────────────────────────────────────── */
aside {
    width: 320px;
    flex-shrink: 0;
    border-right: 1px solid var(--zinc-800);
    background-color: rgba(24, 24, 27, 0.3);
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar-group {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ── Form Controls ────────────────────────────────────── */
label.field-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--zinc-400);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.field-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.field-row label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--zinc-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.field-val {
    font-size: 0.75rem;
    color: var(--zinc-500);
    font-family: monospace;
}

textarea,
select {
    width: 100%;
    background-color: var(--zinc-950);
    border: 1px solid var(--zinc-800);
    border-radius: var(--radius-lg);
    padding: 0.75rem;
    color: var(--zinc-100);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    outline: none;
    transition: border-color 0.15s;
}

textarea {
    resize: none;
    height: 8rem;
}

select {
    appearance: none;
}

textarea:focus,
select:focus {
    border-color: var(--emerald-500);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--emerald-500);
    cursor: pointer;
}

/* progress range specific */
#progressInput {
    height: 6px;
    background-color: var(--zinc-800);
    border-radius: var(--radius-full);
    appearance: none;
}

/* ── Export Button ────────────────────────────────────── */
.sidebar-export {
    margin-top: auto;
    padding-top: 1rem;
}

#exportBtn {
    width: 100%;
    background-color: var(--emerald-600);
    color: #fff;
    border: none;
    border-radius: var(--radius-lg);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.15s;
}

#exportBtn:hover:not(:disabled) {
    background-color: var(--emerald-500);
}

#exportBtn:disabled {
    background-color: var(--zinc-800);
    color: var(--zinc-500);
    cursor: not-allowed;
}

#exportBtn svg {
    width: 1rem;
    height: 1rem;
}

/* ── Preview Section ──────────────────────────────────── */
.preview-section {
    flex: 1;
    background-color: var(--zinc-950);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.preview-grid {
    position: absolute;
    inset: 0;
    opacity: 0.2;
    pointer-events: none;
    background-image: radial-gradient(var(--zinc-700) 1px, transparent 1px);
    background-size: 24px 24px;
}

.preview-inner {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 64rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ── Canvas Wrapper ───────────────────────────────────── */
.canvas-wrapper {
    width: 100%;
    background-color: var(--zinc-900);
    border: 1px solid var(--zinc-800);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.8);
    position: relative;
}

.canvas-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(8px);
    color: var(--zinc-400);
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-family: monospace;
    z-index: 10;
}

#canvas {
    width: 100%;
    aspect-ratio: 16/9;
    display: block;
}

/* transparent checkerboard shown on canvas */
.transparent-bg {
    background-image: url("data:image/svg+xml,%3Csvg width='24' height='24' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0h12v12H0V0zm12 12h12v12H12V12z' fill='%2327272a' fill-opacity='0.4'/%3E%3Cpath d='M12 0h12v12H12V0zM0 12h12v12H0V12z' fill='%2318181b' fill-opacity='0.4'/%3E%3C/svg%3E");
    background-color: #18181b;
}

/* ── Export Overlay ───────────────────────────────────── */
#exportOverlay {
    position: absolute;
    inset: 0;
    background-color: rgba(9,9,11,0.9);
    backdrop-filter: blur(4px);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 20;
}

#exportOverlay.visible {
    display: flex;
}

.export-spinner {
    color: var(--emerald-500);
    margin-bottom: 1.5rem;
}

.export-spinner svg {
    width: 3rem;
    height: 3rem;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.export-title {
    color: var(--zinc-100);
    font-weight: 500;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

#exportProgressText {
    color: var(--zinc-400);
    font-family: monospace;
    margin-bottom: 1.5rem;
}

.export-progress-track {
    width: 20rem;
    height: 0.5rem;
    background-color: var(--zinc-800);
    border-radius: var(--radius-full);
    overflow: hidden;
}

#exportProgressBar {
    height: 100%;
    background-color: var(--emerald-500);
    transition: width 0.3s ease-out;
    width: 0%;
}

#exportFramesText {
    margin-top: 1rem;
    font-size: 0.75rem;
    color: var(--zinc-500);
}

/* ── Playback Controls ────────────────────────────────── */
.playback-controls {
    margin-top: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    background-color: rgba(24,24,27,0.8);
    backdrop-filter: blur(12px);
    border: 1px solid var(--zinc-800);
    padding: 0.5rem;
    border-radius: var(--radius-full);
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

.ctrl-btn {
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    border-radius: var(--radius-full);
    background-color: transparent;
    color: var(--zinc-400);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.15s, color 0.15s;
    flex-shrink: 0;
}

.ctrl-btn:hover {
    background-color: var(--zinc-800);
    color: var(--zinc-100);
}

#playBtn {
    background-color: var(--zinc-800);
    color: var(--zinc-100);
}

#playBtn:hover {
    background-color: var(--zinc-700);
}

.ctrl-btn svg {
    width: 1rem;
    height: 1rem;
}

#playIcon svg { margin-left: 2px; }

.hidden { display: none !important; }

.progress-wrap {
    width: 24rem;
    padding: 0 1rem;
    display: flex;
    align-items: center;
}

.time-display {
    color: var(--zinc-400);
    font-size: 0.875rem;
    font-family: monospace;
    width: 4rem;
    text-align: right;
    padding-right: 1rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 0;
}

.time-display svg {
    width: 0.75rem;
    height: 0.75rem;
    flex-shrink: 0;
}

/* ── Text Align Buttons ───────────────────────────────── */
.align-btns {
    display: flex;
    gap: 0.5rem;
}

.align-btn {
    flex: 1;
    background-color: var(--zinc-950);
    border: 1px solid var(--zinc-800);
    border-radius: var(--radius-lg);
    color: var(--zinc-500);
    padding: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.15s, color 0.15s, background-color 0.15s;
}

.align-btn svg {
    width: 1rem;
    height: 1rem;
}

.align-btn:hover {
    color: var(--zinc-100);
    border-color: var(--zinc-700);
}

.align-btn.active {
    background-color: var(--zinc-800);
    border-color: var(--emerald-500);
    color: var(--emerald-500);
}

/* ── Font Upload ──────────────────────────────────────── */
#fontFileInput {
    display: none;
}

.font-upload-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    background-color: var(--zinc-950);
    border: 1px dashed var(--zinc-700);
    border-radius: var(--radius-lg);
    padding: 0.6rem 0.75rem;
    color: var(--zinc-400);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
    overflow: hidden;
}

.font-upload-btn:hover {
    border-color: var(--emerald-500);
    color: var(--zinc-100);
}

.font-upload-btn.loaded {
    border-style: solid;
    border-color: var(--emerald-500);
    color: var(--emerald-500);
}

.font-upload-btn svg {
    width: 0.875rem;
    height: 0.875rem;
    flex-shrink: 0;
}

#fontFileName {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ── Duration Control (in playback bar) ───────────────── */
.duration-control {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0 0.5rem;
}

.duration-control input[type="range"] {
    width: 80px;
}

.duration-control .field-val {
    width: 2rem;
    text-align: right;
}