/* ==========================================================================
   CENTRAL BOOMBOX - MAITRI PROJECT "SKETCH UI" STYLE GUIDE
   Theme: Lime Spark (#B6FF2E) x Graphite Ink (#23262F) on Canvas (#FAFAF7)
   ========================================================================== */

:root {
    /* Brand Color Tokens (Maitri Style Guide) */
    --color-brand-accent: #B6FF2E;       /* Lime Spark */
    --color-brand-hover: #9fe61c;        /* Lime Darker */
    --color-brand-light: #f3fedc;        /* Lime Tint */
    
    /* Neutral & Ink Tokens */
    --color-ink: #23262F;                /* Graphite Dark (Borders & Main Text) */
    --color-ink-soft: #4A4E5A;           /* Secondary Text */
    --color-ink-muted: #777E90;          /* Subtle Text / Placeholders */
    --color-canvas: #FAFAF7;             /* Warm Light Canvas Background */
    --color-surface: #FFFFFF;            /* Pure White Card Surface */
    --color-surface-alt: #F4F4F0;        /* Subtle Off-White Container */
    
    /* Semantic Status Tokens */
    --status-success-bg: #D1FADF;
    --status-success-text: #027A48;
    --status-warning-bg: #FEF0C7;
    --status-warning-text: #B54708;
    --status-danger-bg: #FEE4E2;
    --status-danger-text: #B42318;
    
    /* Sketch UI Shadow & Border Tokens */
    --sketch-border-width: 2px;
    --sketch-border: var(--sketch-border-width) solid var(--color-ink);
    --sketch-shadow-sm: 2px 2px 0px var(--color-ink);
    --sketch-shadow: 4px 4px 0px var(--color-ink);
    --sketch-shadow-lg: 6px 6px 0px var(--color-ink);
    
    /* Radii */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-pill: 9999px;
    
    /* Typography */
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-canvas);
    color: var(--color-ink);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    background-image: 
        radial-gradient(#23262f0a 1px, transparent 1px);
    background-size: 24px 24px;
}

/* Layout */
.app-layout {
    max-width: 920px;
    margin: 0 auto;
    padding: 24px 16px 48px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Sketch Card Component */
.sketch-card {
    background-color: var(--color-surface);
    border: var(--sketch-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--sketch-shadow);
    padding: 24px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding: 16px 20px;
    background-color: var(--color-surface);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    width: 44px;
    height: 44px;
    background-color: var(--color-brand-accent);
    border: var(--sketch-border);
    border-radius: var(--radius-md);
    box-shadow: var(--sketch-shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-ink);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-ink);
}

.brand-tag {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-ink-muted);
}

.nav-status {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* Status Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    border: var(--sketch-border);
    box-shadow: var(--sketch-shadow-sm);
    text-transform: uppercase;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: currentColor;
}

.badge-success {
    background-color: var(--status-success-bg);
    color: var(--status-success-text);
}

.badge-accent {
    background-color: var(--color-brand-accent);
    color: var(--color-ink);
}

.badge-neutral {
    background-color: var(--color-surface-alt);
    color: var(--color-ink);
}

/* Hero Section */
.hero-section {
    padding: 32px;
}

.section-header {
    margin-bottom: 24px;
}

.pill-tag {
    display: inline-block;
    background-color: var(--color-brand-accent);
    color: var(--color-ink);
    border: var(--sketch-border);
    border-radius: var(--radius-pill);
    padding: 3px 12px;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    margin-bottom: 12px;
    box-shadow: var(--sketch-shadow-sm);
}

.hero-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
    color: var(--color-ink);
    margin-bottom: 8px;
}

.hero-title .highlight {
    background-color: var(--color-brand-accent);
    padding: 0 6px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--color-ink);
    display: inline-block;
    box-shadow: 2px 2px 0px var(--color-ink);
}

.hero-desc {
    color: var(--color-ink-soft);
    font-size: 0.95rem;
    max-width: 680px;
}

.code-inline {
    background-color: var(--color-surface-alt);
    border: 1px solid var(--color-ink);
    padding: 2px 6px;
    border-radius: 6px;
    font-family: monospace;
    font-weight: 700;
    font-size: 0.88em;
}

/* Form Styles */
.converter-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 8px;
}

.form-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--color-ink);
    text-transform: uppercase;
}

.input-group {
    display: flex;
    align-items: stretch;
    background-color: var(--color-surface);
    border: var(--sketch-border);
    border-radius: var(--radius-md);
    box-shadow: var(--sketch-shadow-sm);
    transition: box-shadow var(--transition-fast);
    overflow: hidden;
}

.input-group:focus-within {
    box-shadow: 4px 4px 0px var(--color-ink);
    border-color: var(--color-ink);
}

.input-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 14px;
    color: var(--color-ink-muted);
}

.sketch-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-ink);
    padding: 14px 6px;
    min-width: 0;
}

.sketch-input::placeholder {
    color: var(--color-ink-muted);
    font-weight: 500;
}

/* Buttons (Sketch UI with click feedback) */
.btn-primary, .btn-secondary, .btn-sample, .btn-copy-cmd, .btn-play {
    cursor: pointer;
    font-family: var(--font-family);
    border: var(--sketch-border);
    transition: transform 0.1s ease, box-shadow 0.1s ease;
    user-select: none;
}

.btn-primary {
    background-color: var(--color-brand-accent);
    color: var(--color-ink);
    font-weight: 800;
    font-size: 0.95rem;
    letter-spacing: 0.04em;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--sketch-shadow);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
}

.btn-primary:hover {
    background-color: var(--color-brand-hover);
}

.btn-primary:active {
    transform: translate(2px, 2px);
    box-shadow: var(--sketch-shadow-sm);
}

.btn-secondary {
    background-color: var(--color-surface-alt);
    color: var(--color-ink);
    font-weight: 700;
    font-size: 0.85rem;
    padding: 0 16px;
    border: none;
    border-left: var(--sketch-border);
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-secondary:hover {
    background-color: #e9e9e3;
}

.btn-secondary:active {
    background-color: #deded6;
}

/* Sample Links */
.sample-links {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 16px;
    font-size: 0.8rem;
}

.sample-label {
    font-weight: 700;
    color: var(--color-ink-muted);
}

.btn-sample {
    background-color: var(--color-surface-alt);
    color: var(--color-ink);
    font-weight: 600;
    font-size: 0.78rem;
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    box-shadow: 2px 2px 0px var(--color-ink);
}

.btn-sample:hover {
    background-color: var(--color-brand-light);
    border-color: var(--color-ink);
}

.btn-sample:active {
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0px var(--color-ink);
}

/* Loading Skeleton / Spinner */
.loading-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background-color: var(--color-brand-light);
}

.spinner {
    width: 44px;
    height: 44px;
    border: 4px solid var(--color-ink);
    border-top-color: var(--color-brand-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}

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

.loading-text h3 {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--color-ink);
    margin-bottom: 2px;
}

.loading-text p {
    font-size: 0.88rem;
    color: var(--color-ink-soft);
}

/* Error Card */
.error-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background-color: var(--status-danger-bg);
    border-color: var(--color-ink);
    color: var(--status-danger-text);
}

.alert-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.alert-content {
    flex: 1;
}

.alert-content h4 {
    font-size: 1rem;
    font-weight: 800;
    margin-bottom: 2px;
}

.alert-content p {
    font-size: 0.88rem;
}

.btn-icon {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--status-danger-text);
}

/* Result Card */
.result-card {
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    background-color: var(--color-surface);
}

.media-preview {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.thumbnail-wrapper {
    position: relative;
    width: 140px;
    height: 90px;
    border: var(--sketch-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--sketch-shadow-sm);
    flex-shrink: 0;
    background-color: var(--color-surface-alt);
}

.video-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.thumb-badge {
    position: absolute;
    bottom: 6px;
    right: 6px;
    background-color: var(--color-ink);
    color: #fff;
    font-size: 0.68rem;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 4px;
}

.media-info {
    flex: 1;
    min-width: 240px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.badge-row {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.video-title {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-ink);
    line-height: 1.3;
}

.video-author {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-ink-soft);
}

.sketch-divider {
    border: none;
    border-top: var(--sketch-border);
    margin: 4px 0;
}

/* Copy Box */
.copy-box {
    display: flex;
    gap: 12px;
    margin-top: 6px;
    flex-wrap: wrap;
}

.copy-box .sketch-input {
    background-color: var(--color-surface-alt);
    border: var(--sketch-border);
    border-radius: var(--radius-md);
    box-shadow: var(--sketch-shadow-sm);
    padding: 12px 14px;
    font-family: monospace;
    font-size: 0.88rem;
    font-weight: 700;
}

.copy-box .btn-primary {
    width: auto;
    padding: 12px 20px;
    white-space: nowrap;
}

/* In-Game Commands Grid */
.commands-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.command-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 12px;
}

.cmd-item {
    background-color: var(--color-surface-alt);
    border: var(--sketch-border);
    border-radius: var(--radius-md);
    padding: 12px;
    box-shadow: var(--sketch-shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.cmd-label {
    font-size: 0.68rem;
    font-weight: 800;
    color: var(--color-ink-muted);
    letter-spacing: 0.05em;
}

.cmd-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-ink);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
}

.cmd-box code {
    font-family: monospace;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--color-ink);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.btn-copy-cmd {
    background-color: var(--color-brand-accent);
    color: var(--color-ink);
    font-weight: 800;
    font-size: 0.72rem;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    box-shadow: 1px 1px 0px var(--color-ink);
    flex-shrink: 0;
}

.btn-copy-cmd:hover {
    background-color: var(--color-brand-hover);
}

.btn-copy-cmd:active {
    transform: translate(1px, 1px);
    box-shadow: none;
}

/* Audio Player Tester */
.audio-tester-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.audio-player-box {
    display: flex;
    align-items: center;
    gap: 16px;
    background-color: var(--color-surface-alt);
    border: var(--sketch-border);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    box-shadow: var(--sketch-shadow-sm);
    flex-wrap: wrap;
}

.btn-play {
    width: 44px;
    height: 44px;
    background-color: var(--color-brand-accent);
    color: var(--color-ink);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: var(--sketch-shadow-sm);
    flex-shrink: 0;
}

.btn-play:hover {
    background-color: var(--color-brand-hover);
}

.btn-play:active {
    transform: translate(1px, 1px);
    box-shadow: none;
}

.player-timeline {
    flex: 1;
    min-width: 180px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.time-display {
    font-size: 0.75rem;
    font-weight: 700;
    font-family: monospace;
    color: var(--color-ink);
    display: flex;
    gap: 4px;
}

.time-sep {
    color: var(--color-ink-muted);
}

.range-slider {
    width: 100%;
    height: 8px;
    accent-color: var(--color-ink);
    cursor: pointer;
}

.player-volume {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.range-slider-sm {
    width: 70px;
    accent-color: var(--color-ink);
    cursor: pointer;
}

/* Guidance / Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}

.info-card {
    position: relative;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.card-icon-tag {
    width: 32px;
    height: 32px;
    background-color: var(--color-brand-accent);
    border: var(--sketch-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--sketch-shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.9rem;
    color: var(--color-ink);
    margin-bottom: 4px;
}

.info-card-title {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--color-ink);
}

.info-card-text {
    font-size: 0.88rem;
    color: var(--color-ink-soft);
    line-height: 1.5;
}

/* Footer */
.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    padding: 18px 24px;
    font-size: 0.85rem;
}

.footer-left strong {
    color: var(--color-ink);
}

.footer-sub {
    font-size: 0.78rem;
    color: var(--color-ink-muted);
}

.highlight-tag {
    background-color: var(--color-brand-accent);
    padding: 1px 6px;
    border-radius: 4px;
    border: 1px solid var(--color-ink);
    font-weight: 700;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background-color: var(--color-ink);
    color: #fff;
    padding: 12px 20px;
    border: var(--sketch-border);
    border-radius: var(--radius-md);
    box-shadow: var(--sketch-shadow);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 0.88rem;
    z-index: 9999;
    animation: toastIn 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast-icon {
    width: 22px;
    height: 22px;
    background-color: var(--color-brand-accent);
    color: var(--color-ink);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 900;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Helper Utilities */
.hidden {
    display: none !important;
}

/* Responsive adjustments */
@media (max-width: 640px) {
    .app-layout {
        padding: 16px 12px 32px;
    }

    .hero-section {
        padding: 20px;
    }

    .hero-title {
        font-size: 1.6rem;
    }

    .sketch-card {
        padding: 18px;
    }

    .thumbnail-wrapper {
        width: 100%;
        height: 180px;
    }

    .media-preview {
        flex-direction: column;
        align-items: flex-start;
    }

    .copy-box .btn-primary {
        width: 100%;
    }
}