/* ===================================================
   VIT Bhopal PYQs — style.css
   Mobile-first, Inter font, icon-aware design
=================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --bg-color: #f4f4f6;
    --card-bg: #ffffff;
    --text-color: #1a1a1a;
    --text-muted: #666;
    --border-color: #e0e0e0;
    --primary: #1a1a2e;
    --primary-hover: #16213e;
    --primary-text: #fff;
    --accent: #0f3460;
    --accent-light: #e8eaf6;
    --secondary: #eef0f2;
    --secondary-hover: #dde0e5;
    --secondary-text: #333;
    --danger: #d32f2f;
    --danger-bg: #fff0f0;
    --danger-border: #ffcdd2;
    --success: #2e7d32;
    --radius: 10px;
    --shadow: 0 2px 16px rgba(0,0,0,0.08);
}

/* ---- Base ---- */
*, *::before, *::after { box-sizing: border-box; }

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

/* ---- Material Symbols utility ---- */
.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    vertical-align: middle;
    line-height: 1;
    user-select: none;
}

/* ---- Container ---- */
.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* On larger screens, give card style */
@media (min-width: 680px) {
    .container {
        margin: 24px auto;
        min-height: auto;
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: 16px;
        box-shadow: var(--shadow);
        overflow: hidden;
    }
}

/* ---- Header / Branding ---- */
header {
    padding: 16px 20px 0;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.brand-icon {
    font-size: 2rem;
    color: var(--primary);
    font-variation-settings: 'FILL' 1, 'wght' 600, 'GRAD' 0, 'opsz' 40;
}

.brand-text h1 {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    margin: 0;
    line-height: 1.2;
    color: var(--primary);
}

.brand-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.2px;
}

/* ---- Tabs ---- */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    background: none;
    border: none;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-muted);
    padding: 10px 12px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: color 0.15s;
    font-family: inherit;
    white-space: nowrap;
}
.tab-icon { font-size: 1.1rem; }
.tab-btn.active { color: var(--primary); border-bottom: 2px solid var(--primary); }
.tab-btn:hover { color: var(--primary); }

/* ---- Main ---- */
main { flex: 1; padding: 20px; background: var(--card-bg); }

/* ---- Rate limit banner ---- */
.rate-limit-banner {
    background: #fff3e0;
    border: 1px solid #ffb74d;
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 18px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #e65100;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ---- Section desc ---- */
.section-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0 0 18px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.feature-note {
    background: var(--accent-light);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 14px;
    margin-bottom: 14px;
    margin-top: 20px;
}

.feature-note h3 {
    margin: 0 0 6px;
    font-size: 0.95rem;
    color: var(--accent-dark);
}

.feature-note p {
    margin: 0 0 8px;
    color: var(--text-color);
    font-size: 0.86rem;
}

.feature-note ul {
    margin: 0;
    padding-left: 18px;
}

.feature-note li {
    color: var(--text-muted);
    font-size: 0.84rem;
    margin-bottom: 4px;
}

.hidden { display: none !important; }
.text-center { text-align: center; }

/* ---- Icon utilities ---- */
.btn-icon { font-size: 1.1rem; vertical-align: -3px; margin-right: 3px; }
.btn-icon-sm { font-size: 1rem; vertical-align: -3px; margin-right: 2px; }
.label-icon { font-size: 1rem; vertical-align: -3px; color: var(--text-muted); margin-right: 3px; }

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: none;
    padding: 13px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius);
    cursor: pointer;
    text-align: center;
    transition: background 0.15s, transform 0.1s;
    width: 100%;
    font-family: inherit;
    letter-spacing: -0.1px;
    -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.97); }

.btn-sm {
    padding: 8px 14px;
    font-size: 0.85rem;
    width: auto;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--primary-text);
}
.btn-primary:hover { background-color: var(--primary-hover); }
.btn-primary:disabled { background-color: #aaa; cursor: not-allowed; transform: none; }

.btn-secondary {
    background-color: var(--secondary);
    color: var(--secondary-text);
}
.btn-secondary:hover { background-color: var(--secondary-hover); }

.is-loading {
    opacity: 0.75;
    cursor: wait !important;
    pointer-events: none;
}

/* ---- Forms ---- */
.form-group { margin-bottom: 18px; }
label { 
    display: flex;
    align-items: center;
    font-weight: 600;
    margin-bottom: 7px;
    font-size: 0.85rem;
    color: var(--text-color);
}

input[type="text"], select, textarea {
    width: 100%; padding: 11px 14px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: inherit;
    box-sizing: border-box;
    color: var(--text-color);
    background: #fff;
    transition: border-color 0.15s;
    -webkit-appearance: none;
    appearance: none;
}
input[type="text"]:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(15,52,96,0.1);
}
textarea { resize: vertical; }

/* ---- Upload section ---- */
.upload-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.upload-actions .btn { flex: 1; min-width: 130px; }

/* ---- Arrange Grid ---- */
.pages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.page-thumb {
    position: relative;
    aspect-ratio: 3/4;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    background-color: #f5f5f5;
    cursor: grab;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-thumb img {
    width: 100%; height: 100%;
    object-fit: cover;
    pointer-events: none;
}

.page-thumb .page-num {
    position: absolute; top: 5px; left: 5px;
    background: rgba(0,0,0,0.6);
    color: white; font-size: 0.7rem;
    padding: 2px 6px; border-radius: 10px;
}

.page-thumb .delete-btn {
    position: absolute; top: 5px; right: 5px;
    background: rgba(220,53,69,0.9);
    color: white; font-size: 0.85rem;
    width: 22px; height: 22px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; border: none; z-index: 10;
}

.page-thumb .size-badge {
    position: absolute; bottom: 5px; right: 5px;
    background: rgba(0,0,0,0.7); color: white; padding: 2px 6px;
    border-radius: 4px; font-size: 0.68rem; pointer-events: none; z-index: 10;
}

.actions-row { display: flex; gap: 10px; }
.btn-flex-1 { flex: 1; }
.btn-flex-2 { flex: 2; }

/* ---- Crop View Overlay ---- */
.fullscreen-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: #000;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.crop-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: #111;
    color: white;
    gap: 12px;
}
.crop-header h3 { margin: 0; font-size: 1rem; font-weight: 600; flex: 1; }
.crop-header > div { display: flex; gap: 8px; }

.crop-container {

    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: none;
}

#crop-canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* ---- Corner handles ---- */
.crop-handle {
    position: absolute;
    z-index: 100;
    transform: translate(-50%, -50%);
    touch-action: none;
}

.crop-handle--corner {
    width: 26px; height: 26px;
    background-color: rgba(0, 122, 255, 0.7);
    border: 2.5px solid #fff;
    border-radius: 50%;
    cursor: crosshair;
    box-shadow: 0 2px 6px rgba(0,0,0,0.4);
}

/* ---- Edge handles (midpoints of each edge) ---- */
.crop-handle--edge {
    width: 36px; height: 14px;
    background-color: rgba(255, 255, 255, 0.85);
    border: 2px solid rgba(0, 122, 255, 0.8);
    border-radius: 7px;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.35);
}
/* Rotate edge handles on left/right so they look vertical */
#handle-left.crop-handle--edge,
#handle-right.crop-handle--edge {
    width: 14px; height: 36px;
}

/* ---- Rotate buttons ---- */
.rotate-btn {
    position: absolute; bottom: 20px; width: 48px; height: 48px;
    border-radius: 50%; background: rgba(0,0,0,0.65); color: white;
    border: none; font-size: 1.5rem; display: flex; align-items: center;
    justify-content: center; z-index: 100; cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}
.rotate-btn--left { left: 20px; }
.rotate-btn--right { right: 20px; }

/* ---- Preview container ---- */
.preview-wrapper { background: #222; padding: 15px; box-sizing: border-box; }
#preview-canvas {
    max-width: 100%; max-height: 100%; object-fit: contain;
    border: 1px solid #444; border-radius: 6px; box-shadow: 0 4px 16px rgba(0,0,0,0.5);
}

/* ---- OCR warning ---- */
.ocr-warning {
    background: var(--danger-bg); color: var(--danger);
    border: 1px solid var(--danger-border);
    border-radius: 8px; padding: 12px; margin-bottom: 18px;
    font-size: 0.88rem; font-weight: 500;
}

/* ---- Progress & Loader ---- */
.loader {
    border: 4px solid #f0f0f0;
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    width: 32px; height: 32px;
    animation: spin 0.8s linear infinite;
    margin: 16px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

.processing-icon {
    font-size: 3rem;
    color: var(--primary);
    display: block;
    margin-bottom: 12px;
    animation: spin 1.5s linear infinite;
}

.progress-bar-container {
    width: 100%; height: 8px;
    background-color: #eee;
    border-radius: 4px;
    margin-top: 18px;
    overflow: hidden;
}
.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

/* ---- Search bar with icon ---- */
.search-bar-group {
    position: relative;
    margin-bottom: 0;
}
.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.2rem;
    pointer-events: none;
}
.search-bar-group input {
    padding-left: 42px;
}

/* ---- Search results ---- */
.results-grid { display: flex; flex-direction: column; gap: 12px; margin-top: 16px; }

.paper-card {
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: var(--card-bg);
    transition: border-color 0.15s, box-shadow 0.15s;
}
.paper-card[style*="cursor: pointer"]:active { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(15,52,96,0.08); }

.paper-details h3 { margin: 0 0 4px; font-size: 1rem; font-weight: 600; }
.badge {
    display: inline-flex; align-items: center;
    background: var(--accent-light); padding: 3px 10px;
    border-radius: 12px; font-size: 0.72rem; font-weight: 600; color: var(--accent);
}

/* ---- PDF Preview (mobile-safe) ---- */
.pdf-preview-wrap {
    margin-top: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    height: 200px;
    position: relative;
    background: #f5f5f5;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-direction: column;
    color: var(--text-muted);
    font-size: 0.9rem;
}
.pdf-preview-wrap .pdf-icon {
    font-size: 2.5rem;
    color: var(--danger);
    font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 40;
}
.pdf-preview-wrap .open-overlay {
    position: absolute; bottom: 0; left: 0; right: 0;
    padding: 8px;
    background: linear-gradient(transparent, rgba(0,0,0,0.65));
    color: white; font-size: 0.8rem; text-align: center;
}
.img-preview-wrap {
    margin-top: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    height: 200px;
    position: relative;
    cursor: pointer;
}
.img-preview-wrap img {
    width: 100%; height: 100%; object-fit: cover; object-position: top; display: block;
}
.img-preview-wrap .open-overlay {
    position: absolute; bottom: 0; left: 0; right: 0;
    padding: 8px;
    background: linear-gradient(transparent, rgba(0,0,0,0.65));
    color: white; font-size: 0.8rem; text-align: center;
}

.single-image-preview {
    border: 2px solid var(--accent);
    box-shadow: 0 0 0 3px rgba(15,52,96,0.1);
}

.paper-actions {
    display: flex; gap: 10px; margin-top: 6px;
}
.paper-actions .btn-dl {
    flex: 2;
    display: inline-flex; align-items: center; justify-content: center; gap: 5px;
    background: var(--primary); color: white;
    padding: 9px 14px; border-radius: 8px;
    text-decoration: none; font-size: 0.85rem; font-weight: 600;
    border: none; cursor: pointer;
}
.paper-actions .btn-report {
    flex: 1;
    background: var(--danger-bg); color: var(--danger);
    border: 1.5px solid var(--danger-border);
    padding: 9px 14px; border-radius: 8px;
    font-size: 0.85rem; font-weight: 600;
    cursor: pointer; font-family: inherit;
}

.dl-btn {
    display: inline-block; background: var(--primary); color: white;
    padding: 6px 12px; border-radius: 6px; text-decoration: none;
    font-size: 0.85rem; text-align: center; margin-top: 5px;
}

/* ---- Pagination ---- */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 20px;
    padding-bottom: 4px;
}
.page-btn {
    min-width: 36px; height: 36px;
    padding: 0 10px;
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text-color);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.12s, border-color 0.12s;
    display: flex; align-items: center; justify-content: center;
}
.page-btn:hover { background: var(--secondary); }
.page-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

#global-message { margin-top: 14px; font-size: 0.9rem; font-weight: 600; text-align: center; min-height: 20px; }
.success { color: var(--success); }
.error { color: var(--danger); }
.status-msg { color: #aaa; font-size: 0.82rem; text-align: center; margin: 6px 0; }

/* ---- Duplicate warning ---- */
.dup-warning {
    background: #fff8e1; border: 1px solid #f9a825;
    border-radius: 8px; padding: 12px 15px; margin-bottom: 16px;
    font-size: 0.88rem;
}
.dup-warning strong { color: #e65100; }
.dup-warning p { margin: 6px 0 10px; color: #555; }
.dup-thumb-wrap {
    display: inline-block; border: 1px solid #ddd; border-radius: 6px;
    overflow: hidden; cursor: pointer; width: 90px; height: 120px; position: relative;
}
.dup-thumb-wrap img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }
.dup-thumb-wrap .dup-thumb-label {
    position: absolute; bottom: 0; left: 0; right: 0;
    background: rgba(0,0,0,0.55); color: white;
    font-size: 0.68rem; text-align: center; padding: 3px;
}

/* ---- Custom Select ---- */
.custom-select-container { position: relative; }
.custom-select-header {
    width: 100%; padding: 11px 14px;
    border: 1.5px solid var(--border-color); border-radius: var(--radius);
    background: #fff; cursor: pointer;
    display: flex; justify-content: space-between; align-items: center;
    font-size: 0.95rem; font-family: inherit; box-sizing: border-box;
    transition: border-color 0.15s;
}
.custom-select-header:focus { border-color: var(--accent); }
.custom-select-dropdown {
    position: absolute; top: 100%; left: 0; right: 0; background: #fff; z-index: 1001;
    border: 1.5px solid var(--border-color); border-radius: var(--radius);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12); margin-top: 5px; display: flex; flex-direction: column;
}
.custom-options-list {
    list-style: none; margin: 0; padding: 0; max-height: 220px; overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.custom-options-list li {
    padding: 12px 14px; cursor: pointer; border-bottom: 1px solid #f0f0f0;
    font-size: 0.9rem; color: #333;
}
.custom-options-list li:active, .custom-options-list li:hover { background: var(--accent-light); }

/* ---- Search navigation ---- */
.search-nav { margin-bottom: 18px; display: flex; align-items: center; gap: 10px; }
.search-breadcrumb {
    font-weight: 500; font-size: 0.85rem; color: var(--text-muted);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ---- Footer ---- */
.app-footer {
    padding: 14px 20px;
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    background: var(--card-bg);
}

.footer-actions {
    margin-top: 8px;
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.footer-support-btn {
    border: 1px solid var(--border-color);
    background: var(--secondary);
    color: var(--secondary-text);
    border-radius: 999px;
    padding: 5px 12px;
    font-size: 0.75rem;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.modal-card {
    width: 100%;
    max-width: 460px;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 16px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.modal-header h3 {
    margin: 0;
    font-size: 1rem;
}

.modal-close {
    border: none;
    background: transparent;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-muted);
}

.modal-desc {
    margin: 0 0 10px;
    color: var(--text-muted);
    font-size: 0.86rem;
}

.modal-card textarea {
    min-height: 120px;
}

.modal-meta {
    margin-top: 6px;
    text-align: right;
    color: var(--text-muted);
    font-size: 0.78rem;
}

.modal-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.requests-modal-card {
    max-height: min(84vh, 760px);
    display: flex;
    flex-direction: column;
}

.requests-list-scroll {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    margin-top: 8px;
}

.seo-hidden-links {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ---- Mobile-specific tweaks ---- */
@media (max-width: 480px) {
    main { padding: 14px; }
    header { padding: 14px 14px 0; }
    .brand-text h1 { font-size: 1.15rem; }
    .pages-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .btn { padding: 12px 16px; font-size: 0.9rem; }
    .crop-header { padding: 15px 15px; }
    .crop-header h3 { font-size: 0.9rem; }
}

/* Prevent zoom on input focus on iOS */
@media screen and (max-width: 768px) {
    input, select, textarea { font-size: 16px !important; }
}