/* ═══════════════════════════════════════════════
   ScholarAI Pro — Dark Academic Theme
   ArabAI Academy • arabaiacademy.com
   ═══════════════════════════════════════════════ */

:root {
    --sai-bg: #0a0e1a;
    --sai-bg-card: #111827;
    --sai-bg-hover: #1a2236;
    --sai-border: #1e293b;
    --sai-border-active: #3b82f6;
    --sai-accent: #3b82f6;
    --sai-accent-glow: rgba(59, 130, 246, 0.15);
    --sai-accent-soft: #1e3a5f;
    --sai-gold: #f59e0b;
    --sai-gold-glow: rgba(245, 158, 11, 0.12);
    --sai-green: #10b981;
    --sai-red: #ef4444;
    --sai-text: #f1f5f9;
    --sai-text-muted: #94a3b8;
    --sai-text-dim: #64748b;
    --sai-surface: #0f172a;
    --sai-font-display: 'Crimson Pro', 'Amiri', Georgia, serif;
    --sai-font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --sai-radius: 12px;
    --sai-radius-lg: 16px;
}

/* ─── Reset within our scope ─── */
.scholarai-app * {
    box-sizing: border-box;
}

/* ─── App Container ─── */
.scholarai-app {
    background: linear-gradient(135deg, var(--sai-bg) 0%, #0f1629 50%, var(--sai-bg) 100%);
    color: var(--sai-text);
    font-family: var(--sai-font-display);
    border-radius: var(--sai-radius-lg);
    overflow: hidden;
    position: relative;
    min-height: 600px;
}

/* ─── Header ─── */
.scholarai-header {
    padding: 20px 28px;
    border-bottom: 1px solid var(--sai-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    backdrop-filter: blur(20px);
    background: rgba(10, 14, 26, 0.85);
}

.scholarai-header-compact {
    justify-content: center;
}

.scholarai-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.scholarai-logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--sai-accent), #6366f1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 20px var(--sai-accent-glow);
    flex-shrink: 0;
}

.scholarai-logo-text {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--sai-text), var(--sai-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.scholarai-logo-sub {
    font-size: 11px;
    color: var(--sai-text-dim);
    font-family: var(--sai-font-ui);
    margin-top: 1px;
}

.scholarai-badge {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.5px;
    padding: 3px 8px;
    border-radius: 4px;
    background: var(--sai-accent-soft);
    color: var(--sai-accent);
    font-family: var(--sai-font-ui);
    text-transform: uppercase;
}

/* ─── Navigation ─── */
.scholarai-nav {
    display: flex;
    gap: 3px;
    background: var(--sai-surface);
    border-radius: var(--sai-radius);
    padding: 4px;
    flex-wrap: wrap;
}

.scholarai-nav-btn {
    padding: 9px 16px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    font-family: var(--sai-font-ui);
    transition: all 0.2s ease;
    background: transparent;
    color: var(--sai-text-muted);
    white-space: nowrap;
}

.scholarai-nav-btn:hover {
    color: var(--sai-text);
    background: var(--sai-bg-hover);
}

.scholarai-nav-btn.active {
    background: var(--sai-accent);
    color: #fff;
    box-shadow: 0 2px 12px var(--sai-accent-glow);
}

/* ─── Usage Bar ─── */
.scholarai-usage-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 28px;
    background: var(--sai-surface);
    border-bottom: 1px solid var(--sai-border);
    font-family: var(--sai-font-ui);
    font-size: 11px;
    color: var(--sai-text-dim);
}

.scholarai-usage-progress {
    flex: 1;
    max-width: 200px;
    height: 4px;
    background: var(--sai-border);
    border-radius: 2px;
    overflow: hidden;
}

.scholarai-usage-fill {
    height: 100%;
    background: var(--sai-accent);
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 0%;
}

/* ─── Content ─── */
.scholarai-content {
    padding: 28px;
    min-height: 400px;
}

.scholarai-tab-panel {
    display: none;
    animation: saiSlideIn 0.3s ease;
}

.scholarai-tab-panel.active {
    display: block;
}

@keyframes saiSlideIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ─── Dropzone ─── */
.scholarai-dropzone {
    border: 2px dashed var(--sai-border);
    border-radius: var(--sai-radius-lg);
    padding: 56px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(17, 24, 39, 0.5);
}

.scholarai-dropzone:hover,
.scholarai-dropzone.dragging {
    border-color: var(--sai-accent);
    background: var(--sai-accent-glow);
}

.scholarai-dropzone-icon {
    font-size: 48px;
    margin-bottom: 14px;
    opacity: 0.8;
}

.scholarai-dropzone-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.scholarai-dropzone-sub {
    color: var(--sai-text-dim);
    font-size: 14px;
    font-family: var(--sai-font-ui);
}

.scholarai-dropzone.has-file {
    border-color: var(--sai-green);
    border-style: solid;
}

/* ─── Buttons ─── */
.scholarai-btn-primary {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--sai-font-ui);
    background: linear-gradient(135deg, var(--sai-accent), #6366f1);
    color: #fff;
    box-shadow: 0 2px 16px var(--sai-accent-glow);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.scholarai-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 24px var(--sai-accent-glow);
}

.scholarai-btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.scholarai-btn-ghost {
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid var(--sai-border);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--sai-font-ui);
    background: transparent;
    color: var(--sai-text-muted);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.scholarai-btn-ghost:hover {
    border-color: var(--sai-accent);
    color: var(--sai-text);
}

.scholarai-btn-gold {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--sai-font-ui);
    background: linear-gradient(135deg, var(--sai-gold), #d97706);
    color: #fff;
    box-shadow: 0 2px 16px var(--sai-gold-glow);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.scholarai-btn-gold:hover {
    transform: translateY(-1px);
}

.scholarai-btn-gold:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ─── Inputs ─── */
.scholarai-input {
    width: 100%;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--sai-border);
    background: var(--sai-surface);
    color: var(--sai-text);
    font-size: 14px;
    font-family: var(--sai-font-ui);
    outline: none;
    transition: border-color 0.2s ease;
}

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

.scholarai-textarea {
    width: 100%;
    min-height: 200px;
    background: var(--sai-surface);
    border: 1px solid var(--sai-border);
    border-radius: var(--sai-radius);
    padding: 16px;
    color: var(--sai-text);
    font-size: 15px;
    font-family: var(--sai-font-display);
    line-height: 1.7;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s ease;
}

.scholarai-textarea:focus {
    border-color: var(--sai-accent);
}

.scholarai-input-row {
    display: flex;
    gap: 10px;
    align-items: stretch;
}

.scholarai-input-row .scholarai-input {
    flex: 1;
}

/* ─── Cards & Results ─── */
.scholarai-card {
    background: var(--sai-bg-card);
    border: 1px solid var(--sai-border);
    border-radius: var(--sai-radius-lg);
    padding: 24px;
}

.scholarai-ai-response {
    background: var(--sai-surface);
    border: 1px solid var(--sai-border);
    border-radius: var(--sai-radius);
    padding: 20px;
    line-height: 1.8;
    font-size: 15px;
    white-space: pre-wrap;
    max-height: 500px;
    overflow-y: auto;
}

.scholarai-monospace {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
}

.scholarai-result h3,
.scholarai-result h4 {
    margin: 0 0 14px;
    font-size: 18px;
    font-weight: 700;
}

/* ─── Stats Row ─── */
.scholarai-stats-row {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.scholarai-stat-box {
    background: var(--sai-surface);
    border: 1px solid var(--sai-border);
    border-radius: var(--sai-radius);
    padding: 16px 20px;
    text-align: center;
    flex: 1;
}

.scholarai-stat-num {
    font-size: 28px;
    font-weight: 700;
    color: var(--sai-accent);
}

.scholarai-stat-label {
    font-size: 11px;
    color: var(--sai-text-dim);
    font-family: var(--sai-font-ui);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

/* ─── Papers List ─── */
.scholarai-paper-card {
    background: var(--sai-surface);
    border: 1px solid var(--sai-border);
    border-radius: var(--sai-radius);
    padding: 16px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.scholarai-paper-card:hover {
    border-color: var(--sai-accent);
    background: var(--sai-bg-hover);
}

.scholarai-paper-card.expanded {
    border-color: var(--sai-accent);
    background: var(--sai-accent-glow);
}

.scholarai-paper-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
}

.scholarai-paper-meta {
    font-size: 12px;
    color: var(--sai-text-dim);
    font-family: var(--sai-font-ui);
    margin-bottom: 8px;
}

.scholarai-tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    font-family: var(--sai-font-ui);
    background: var(--sai-accent-soft);
    color: var(--sai-accent);
    margin-right: 5px;
    margin-bottom: 5px;
}

.scholarai-paper-analysis {
    margin-top: 14px;
    display: none;
}

.scholarai-paper-card.expanded .scholarai-paper-analysis {
    display: block;
}

/* ─── Mode Bar ─── */
.scholarai-mode-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.scholarai-mode-bar button {
    font-size: 13px;
    padding: 8px 16px;
}

/* ─── Actions Row ─── */
.scholarai-actions-row {
    margin-top: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.scholarai-word-count {
    font-size: 12px;
    color: var(--sai-text-dim);
    font-family: var(--sai-font-ui);
}

.scholarai-analyze-btn-wrap {
    margin-top: 20px;
    text-align: center;
}

/* ─── Spinner ─── */
.scholarai-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--sai-border);
    border-top-color: var(--sai-accent);
    border-radius: 50%;
    animation: saiSpin 0.8s linear infinite;
}

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

/* ─── Loading Overlay ─── */
.scholarai-loading {
    position: absolute;
    inset: 0;
    background: rgba(10, 14, 26, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    z-index: 100;
    border-radius: var(--sai-radius-lg);
}

.scholarai-loading .scholarai-spinner {
    width: 40px;
    height: 40px;
    border-width: 3px;
}

.scholarai-loading-text {
    font-family: var(--sai-font-ui);
    font-size: 14px;
    color: var(--sai-text-muted);
}

/* ─── Footer ─── */
.scholarai-footer {
    text-align: center;
    padding: 18px 28px;
    border-top: 1px solid var(--sai-border);
    color: var(--sai-text-dim);
    font-size: 12px;
    font-family: var(--sai-font-ui);
}

/* ─── Access Denied ─── */
.scholarai-access-denied {
    text-align: center;
    padding: 60px 24px;
    background: var(--sai-bg-card);
    border-radius: var(--sai-radius-lg);
    border: 1px solid var(--sai-border);
}

.scholarai-access-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.scholarai-access-denied h3 {
    color: var(--sai-text);
    margin-bottom: 8px;
}

.scholarai-access-denied p {
    color: var(--sai-text-muted);
    margin-bottom: 20px;
}

/* ─── Empty State ─── */
.scholarai-empty {
    text-align: center;
    padding: 48px;
    color: var(--sai-text-dim);
}

.scholarai-empty-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    .scholarai-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .scholarai-nav {
        width: 100%;
        overflow-x: auto;
    }

    .scholarai-nav-btn {
        font-size: 12px;
        padding: 8px 12px;
    }

    .scholarai-content {
        padding: 16px;
    }

    .scholarai-stats-row {
        flex-wrap: wrap;
    }

    .scholarai-stat-box {
        min-width: calc(50% - 8px);
    }

    .scholarai-dropzone {
        padding: 36px 20px;
    }

    .scholarai-mode-bar {
        gap: 4px;
    }

    .scholarai-mode-bar button {
        font-size: 11px;
        padding: 6px 10px;
    }
}

/* ─── Scrollbar ─── */
.scholarai-ai-response::-webkit-scrollbar {
    width: 6px;
}

.scholarai-ai-response::-webkit-scrollbar-track {
    background: transparent;
}

.scholarai-ai-response::-webkit-scrollbar-thumb {
    background: var(--sai-border);
    border-radius: 3px;
}

.scholarai-ai-response::-webkit-scrollbar-thumb:hover {
    background: var(--sai-text-dim);
}

/* ─── Copy success flash ─── */
.scholarai-copy-flash {
    animation: saiFlash 0.6s ease;
}

@keyframes saiFlash {
    0% { background-color: var(--sai-accent-glow); }
    100% { background-color: transparent; }
}