/* ── Reset & Variables ──────────────────────────── */
:root {
    --bg:         #09090b;
    --panel:      #121215;
    --border:     #27272a;
    --border-h:   #3f3f46;

    --text:       #f4f4f5;
    --text-sec:   #a1a1aa;
    --text-dim:   #52525b;

    --input-bg:   #18181b;
    --btn-bg:     #f4f4f5;
    --btn-text:   #09090b;
    --btn-sec:    #27272a;

    --accent:     #6366f1;  /* indigo — used for progress bar */

    --font:   'Noto Sans Devanagari', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --mono:   'Fira Code', ui-monospace, monospace;
    --r:      8px;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 2rem 1rem 4rem;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.app-layout {
    width: 100%;
    max-width: 780px;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

/* ── Header ─────────────────────────────────────── */
.header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border);
}

.title {
    font-size: 1.45rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}
.title span { font-weight: 400; color: var(--text-sec); }

.subtitle {
    font-size: 0.82rem;
    color: var(--text-sec);
    margin-top: 0.2rem;
}
.subtitle a {
    color: var(--text);
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* Badge */
.badge {
    font-family: var(--mono);
    font-size: 0.72rem;
    padding: 0.3rem 0.65rem;
    border-radius: 4px;
    background: var(--panel);
    border: 1px solid var(--border);
    color: var(--text-sec);
    white-space: nowrap;
    flex-shrink: 0;
}
.badge.idle    { color: var(--text-dim); }
.badge.loading { color: #facc15; border-color: #713f12; animation: pulse 1.4s ease infinite; }
.badge.webgpu  { color: #86efac; border-color: #166534; }
.badge.wasm    { color: #fca5a5; border-color: #7f1d1d; }

@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.55} }

/* ── Workspace ───────────────────────────────────── */
.workspace {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.section { display: flex; flex-direction: column; gap: 0.5rem; }

.section-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-dim);
}

/* Sample Prompts */
.sample-prompts { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; }
.sample-label   { font-size: 0.72rem; color: var(--text-dim); }
.sample-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-sec);
    font-family: var(--font);
    font-size: 0.72rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.12s ease;
}
.sample-btn:hover { border-color: var(--border-h); color: var(--text); }

/* Textarea */
textarea {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 0.8rem 1rem;
    color: var(--text);
    font-family: var(--font);
    font-size: 0.93rem;
    line-height: 1.65;
    resize: vertical;
    outline: none;
    transition: border-color 0.15s;
}
textarea:focus { border-color: var(--border-h); }

/* ── Controls ────────────────────────────────────── */
.controls-row {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 1.1rem 1.25rem;
}

.control-item { display: flex; flex-direction: column; gap: 0.4rem; }

.control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.83rem;
    font-weight: 500;
    color: var(--text-sec);
}

.val-tag { font-family: var(--mono); font-size: 0.78rem; color: var(--text); }

.control-subtext { font-size: 0.7rem; color: var(--text-dim); }

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 3px;
    background: var(--border);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px; height: 14px;
    border-radius: 50%;
    background: var(--text);
    cursor: pointer;
}

/* ── Action Bar ──────────────────────────────────── */
.action-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.action-left, .action-right { display: flex; gap: 0.5rem; }

.btn {
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.55rem 1.15rem;
    border-radius: var(--r);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.14s ease;
}
.btn-primary { background: var(--btn-bg); color: var(--btn-text); }
.btn-primary:hover:not(:disabled) { background: #e4e4e7; }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-secondary { background: var(--btn-sec); border-color: var(--border); color: var(--text); }
.btn-secondary:hover:not(:disabled) { border-color: var(--border-h); }
.btn-secondary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-subtle { background: transparent; border-color: var(--border); color: var(--text-sec); }
.btn-subtle:hover { color: var(--text); border-color: var(--border-h); }

/* ── Output Section ──────────────────────────────── */
.output-section { display: flex; flex-direction: column; gap: 0.55rem; }

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.status-text {
    font-size: 0.75rem;
    color: var(--text-dim);
    font-family: var(--mono);
    min-height: 1em;
}

/* Output box — relative so overlay can sit inside it */
.output-box {
    position: relative;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 1.25rem;
    min-height: 200px;
    font-size: 0.93rem;
    line-height: 1.75;
    color: var(--text);
    white-space: pre-wrap;
    word-break: break-word;
    overflow: auto;
}

.placeholder-text { color: var(--text-dim); font-style: italic; }
.prompt-text { color: var(--text-sec); }

.cursor {
    display: inline-block;
    font-weight: 700;
    animation: blink 0.85s infinite;
    margin-left: 1px;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* ── Progress Overlay ────────────────────────────── */
.progress-overlay {
    position: absolute;
    inset: 0;
    border-radius: calc(var(--r) - 1px);
    background: rgba(9,9,11,0.92);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    animation: fadeIn 0.2s ease forwards;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.progress-overlay.hidden {
    display: none;
}

.progress-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    width: min(340px, 80%);
    text-align: center;
}

.progress-icon {
    font-size: 1.5rem;
    animation: bob 1.6s ease-in-out infinite;
}
@keyframes bob { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-5px)} }

.progress-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
}

.progress-track {
    width: 100%;
    height: 5px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), #818cf8);
    border-radius: 3px;
    transition: width 0.25s ease;
}

.progress-pct {
    font-family: var(--mono);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

.progress-sub {
    font-size: 0.72rem;
    color: var(--text-dim);
}

/* ── Stats Bar ───────────────────────────────────── */
.stats-bar {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--text-dim);
    flex-wrap: wrap;
}
.stat-sep { color: var(--border-h); }

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 520px) {
    body { padding: 1rem 0.75rem 3rem; }
    .title { font-size: 1.25rem; }
    .progress-pct { font-size: 1.1rem; }
}