:root {
    --primary-color: #3b82f6;
    --primary-hover: #2a71dc;
    --primary-color-rgb: 59, 130, 246;
    --secondary-color: #40a9ff;
    --green-color: #28a745;
    --green-hover: #218838;
    --watermark-color: #0ea5a4;
    --watermark-hover: #0b9a94;
    --watermark-color-rgb: 14, 165, 164;
    --background-dark: #1e1e1e;
    --background-dark-rgb: 30, 30, 30;
    --background-light: #282828;
    --background-light-rgb: 40, 40, 40;
    --text-light: #ffffff;
    --text-dark: #888;
    --dropdown-bg: #333;
    --dropdown-hover: #3a3a3a;
    --dropdown-border: #444;
    --dropdown-text: #f0f0f0;
    --border-radius: 6px;
    --transition-speed: 0.15s;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 2px 6px rgba(0, 0, 0, 0.3);
    --header-height-desktop: 48px;
    --header-height-mobile: 44px;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', sans-serif;
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    background: var(--background-dark);
    color: var(--text-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overscroll-behavior: none;
    overflow: hidden;
}

header {
    background: #222;
    padding: 0 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height-desktop);
    min-height: var(--header-height-desktop);
    flex-shrink: 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    z-index: 100;
    gap: 14px;
}

.header-info,
.header-center,
.header-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    height: 100%;
}

.header-info {
    flex-shrink: 0;
    min-width: 0;
}

.header-info h1 {
    margin: 0;
    display: flex;
    align-items: center;
    height: 100%;
    color: var(--primary-color);
    font-size: 16px;
    white-space: nowrap;
}

.header-center {
    flex: 1;
    justify-content: center;
    gap: 16px;
    max-width: 600px;
    min-width: 0;
}

.header-controls {
    gap: 10px;
    flex-shrink: 0;
}

.subject-badge {
    background: rgba(59, 130, 246, 0.1);
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 14px;
    padding: 0 12px;
    height: 32px;
    display: flex;
    align-items: center;
    border-radius: var(--border-radius);
    letter-spacing: 0.02em;
    margin-left: 8px;
    border: 1px solid rgba(59, 130, 246, 0.2);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 500px;
    min-width: 0;
    flex-shrink: 1;
    cursor: help;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 8px;
    height: 32px;
    flex-shrink: 0;
}

.control-group label {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 12px;
    white-space: nowrap;
    flex-shrink: 0;
}

.custom-dropdown {
    position: relative;
    min-width: 110px;
    height: 32px;
    user-select: none;
    z-index: 1;
}

.custom-dropdown.open {
    z-index: 1000;
}

.dropdown-selected {
    background: rgba(255, 255, 255, 0.06);
    color: var(--dropdown-text);
    font-size: 12px;
    font-weight: 500;
    padding: 0 12px;
    height: 32px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.08);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all var(--transition-speed) ease;
}

.dropdown-selected:hover,
.custom-dropdown.open .dropdown-selected {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
}

.dropdown-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dropdown-arrow {
    width: 12px;
    height: 12px;
    margin-left: 8px;
    transition: transform var(--transition-speed) ease;
    flex-shrink: 0;
}

.custom-dropdown.open .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-options {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: #2a2a2a;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    max-height: 240px;
    overflow-y: auto;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.15s ease;
}

.custom-dropdown.open .dropdown-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-option {
    padding: 9px 12px;
    font-size: 13px;
    color: var(--dropdown-text);
    cursor: pointer;
    transition: background-color 0.1s ease;
    user-select: none;
}

.dropdown-option:hover {
    background: rgba(255, 255, 255, 0.08);
}

.dropdown-option.selected {
    background: var(--primary-color);
    color: var(--text-light);
    font-weight: 600;
}

.dropdown-option.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.dropdown-options::-webkit-scrollbar {
    width: 5px;
}

.dropdown-options::-webkit-scrollbar-track {
    background: #1a1a1a;
}

.dropdown-options::-webkit-scrollbar-thumb {
    background: #555;
    border-radius: 3px;
}

button,
.watermark-toggle button {
    padding: 0 12px;
    height: 32px;
    font-size: 12px;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    background: #444;
    color: var(--text-light);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-speed) ease;
    flex-shrink: 0;
    white-space: nowrap;
}

button:hover:not(:disabled):not(.disabled):not(.downloading) {
    background: #4a4a4a;
    box-shadow: var(--shadow-hover);
}

button:active:not(:disabled):not(.disabled):not(.downloading) {
    transform: scale(0.98);
}

button:disabled,
button.disabled,
button.downloading {
    opacity: 0.5;
    cursor: not-allowed;
    background: #555;
    box-shadow: none;
}

button.primary {
    background-color: var(--primary-color);
}

button.primary:hover:not(:disabled):not(.disabled):not(.downloading) {
    background-color: var(--primary-hover);
}

button.back {
    background-color: var(--green-color);
}

button.back:hover:not(:disabled):not(.disabled):not(.downloading) {
    background-color: var(--green-hover);
}

button.download-btn {
    background-color: var(--green-color);
}

button.download-btn:hover:not(:disabled):not(.disabled):not(.downloading) {
    background-color: var(--green-hover);
}

.watermark-toggle {
    display: flex;
    align-items: center;
    height: 32px;
}

.watermark-toggle button {
    background: var(--watermark-color);
    min-width: 32px;
    height: 32px;
}

.watermark-toggle button:hover:not(:disabled):not(.disabled):not(.downloading) {
    background: var(--watermark-hover);
}

.watermark-toggle button.active,
.watermark-toggle button[aria-pressed="true"] {
    background: rgba(var(--watermark-color-rgb), 0.2);
    border: 1px solid var(--watermark-color);
}

.watermark-toggle .wm-label {
    font-size: 12px;
}

.icon {
    width: 15px;
    height: 15px;
    flex-shrink: 0;
}

#pdf-container {
    flex: 1;
    display: grid;
    gap: 0;
    padding: 0;
    background: var(--background-light);
    overflow: hidden;
    min-height: 0;
    height: calc(100vh - var(--header-height-desktop));
    height: calc(100dvh - var(--header-height-desktop));
}

.pdf-viewer {
    width: 100%;
    height: 100%;
    background: #2a2a2a;
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.pdf-viewer iframe {
    width: 100%;
    height: 100%;
    border: none;
    flex: 1;
}

.paper-selector {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px;
    background: #2a2a2a;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 100px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 1;
    z-index: 100;
    max-width: 90%;
}

.paper-selector:hover,
.paper-selector:focus-within {
    opacity: 1;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
    background: rgba(30, 30, 30, 0.94);
    border-color: rgba(59, 130, 246, 0.25);
}

.paper-selector-label {
    font-size: 10px;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    white-space: nowrap;
    flex-shrink: 0;
    opacity: 0.85;
}

.paper-selector .custom-dropdown {
    min-width: 160px;
    max-width: 280px;
    height: 32px;
}

.paper-selector .dropdown-selected {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    padding: 0 12px;
    height: 32px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 100px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.paper-selector .dropdown-selected:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.12);
}

.paper-dropdown .dropdown-options {
    bottom: calc(100% + 12px);
    top: auto;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    width: max-content;
    min-width: 220px;
    max-width: 380px;
    border-radius: 10px;
    background: #292929;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
}

.paper-dropdown.open .dropdown-options {
    transform: translateX(-50%) translateY(0);
}

.loader-container {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    z-index: 10;
    backdrop-filter: blur(2px);
}

.loader {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

.grid-1 {
    grid-template-columns: 1fr;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
}

.no-pdf-message,
.no-more-papers {
    text-align: center;
    font-weight: 500;
}

.no-pdf-message {
    padding: 32px 20px;
    font-size: 15px;
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    height: 100%;
    width: 100%;
}

/* Inline empty state when no papers found for selected type */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    height: 100%;
    width: 100%;
    padding: 24px;
    text-align: center;
}

.empty-state-icon {
    width: 56px;
    height: 56px;
    color: #555;
    margin-bottom: 4px;
}

.empty-state-icon svg {
    width: 100%;
    height: 100%;
}

.empty-state-title {
    font-size: 17px;
    font-weight: 600;
    color: #ccc;
    margin: 0;
}

.empty-state-desc {
    font-size: 13px;
    color: #666;
    margin: 0;
    max-width: 280px;
    line-height: 1.5;
}

.empty-state-switch-btn {
    margin-top: 8px;
    padding: 8px 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-light);
    background: #333;
    border: 1px solid #444;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background var(--transition-speed) ease, border-color var(--transition-speed) ease;
    height: auto;
    box-shadow: none;
}

.empty-state-switch-btn:hover {
    background: #3d3d3d;
    border-color: #555;
    box-shadow: none;
    transform: none;
}

@media (max-width: 768px) {
    .empty-state-title {
        font-size: 15px;
    }

    .empty-state-icon {
        width: 44px;
        height: 44px;
    }
}

.no-pdf-message.error-message {
    color: #ff6b6b;
}

.no-more-papers {
    padding: 16px;
    font-size: 13px;
    color: var(--text-dark);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.06);
    margin: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.rotation-prompt {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.rotation-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    color: var(--text-light);
    text-align: center;
    padding: 28px 20px;
    max-width: 90%;
}

.rotation-content p {
    font-size: 15px;
    font-weight: 500;
    line-height: 1.4;
}

.rotation-icon {
    width: 64px;
    height: 64px;
    animation: rotate-device 2s infinite ease-in-out;
    color: var(--primary-color);
}

@keyframes rotate-device {

    0%,
    100% {
        transform: rotate(0deg);
    }

    30%,
    70% {
        transform: rotate(90deg);
    }
}

.seo-content {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px);
    white-space: nowrap;
}

::-webkit-scrollbar {
    width: 7px;
    height: 7px;
}

::-webkit-scrollbar-track {
    background: var(--background-dark);
}

::-webkit-scrollbar-thumb {
    background: #444;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

.exam-type-buttons {
    display: flex;
    align-items: center;
    gap: 8px;
    height: 32px;
}

.exam-type-buttons label {
    color: var(--primary-color);
    font-weight: 600;
}

.exam-toggle-group {
    display: flex;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 3px;
    gap: 3px;
    height: 32px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.exam-toggle-btn {
    padding: 0 14px;
    height: 26px;
    font-size: 11px;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    background: transparent;
    color: var(--text-dark);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    box-shadow: none;
    min-width: 68px;
    position: relative;
}

.exam-toggle-btn:hover:not(.active):not(.disabled) {
    background: rgba(255, 255, 255, 0.08);
    color: var(--dropdown-text);
}

.exam-toggle-btn.active {
    background: var(--primary-color) !important;
    color: var(--text-light) !important;
    box-shadow: 0 2px 8px rgba(var(--primary-color-rgb), 0.35);
}

.exam-toggle-btn.active:hover {
    background: var(--primary-color) !important;
    color: var(--text-light) !important;
    box-shadow: 0 2px 8px rgba(var(--primary-color-rgb), 0.35);
    cursor: default;
}

.exam-toggle-btn.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}


.download-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s;
    pointer-events: none;
}

.download-modal.active {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
}

.download-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.download-modal-content {
    position: relative;
    background: var(--background-light);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5);
    width: 90%;
    max-width: 520px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: scale(0.96) translateY(12px);
    transition: transform 0.2s ease;
    z-index: 10001;
}

.download-modal.active .download-modal-content {
    transform: scale(1) translateY(0);
}

.download-modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.02);
    gap: 14px;
}

.download-header-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.download-modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-light);
    margin: 0;
    line-height: 1.3;
}

.download-modal-title span {
    color: var(--secondary-color);
}

.download-status-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    animation: fadeInDown 0.2s ease-out;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.download-status-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.download-status-text {
    flex: 1;
    margin: 0;
    font-size: 13px;
    font-weight: 500;
    line-height: 1.4;
    color: var(--text-light);
    min-width: 0;
}

.download-status-text[data-status="info"] {
    color: var(--primary-color);
}

.download-status-text[data-status="success"] {
    color: var(--green-color);
}

.download-status-text[data-status="warning"] {
    color: #f59e0b;
}

.download-status-text[data-status="error"] {
    color: #ef4444;
}

.download-percentage {
    font-size: 12px;
    font-weight: 600;
    color: var(--secondary-color);
    white-space: nowrap;
    flex-shrink: 0;
}

.download-progress-bar {
    width: 100%;
    height: 5px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 100px;
    overflow: hidden;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.2);
}

.download-progress-fill {
    height: 100%;
    background: var(--primary-color);
    border-radius: 100px;
    width: 0%;
    transition: width 0.3s ease;
}

.download-progress-fill[data-status="success"] {
    background: var(--green-color);
}

.download-progress-fill[data-status="error"] {
    background: #ef4444;
}

.download-progress-fill[data-status="warning"] {
    background: #f59e0b;
}

.download-modal-close {
    background: transparent;
    border: none;
    color: var(--text-dark);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    box-shadow: none;
}

.download-modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
}

.download-modal-close .icon {
    width: 18px;
    height: 18px;
}

.download-modal-body {
    padding: 20px 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.download-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    transition: all 0.2s ease;
    gap: 16px;
}

.download-option:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.12);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.download-option-info {
    flex: 1;
    min-width: 0;
}

.download-option-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-light);
    margin: 0 0 4px 0;
}

.download-option-desc {
    font-size: 12px;
    color: var(--text-dark);
    margin: 0;
    line-height: 1.4;
}

.download-zip-btn {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 10px 16px;
    background: var(--green-color);
    color: var(--text-light);
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    flex-shrink: 0;
    white-space: nowrap;
    box-shadow: 0 1px 4px rgba(40, 167, 69, 0.3);
    height: auto;
}

.download-zip-btn:hover:not(:disabled):not(.disabled):not(.downloading) {
    background: var(--green-hover);
    box-shadow: 0 2px 8px rgba(40, 167, 69, 0.4);
}

.download-zip-btn:active:not(:disabled):not(.disabled):not(.downloading) {
    transform: scale(0.98);
}

.download-zip-btn .icon {
    width: 16px;
    height: 16px;
}

.download-zip-btn:disabled,
.download-zip-btn.disabled,
.download-zip-btn.downloading {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    background: #555;
    box-shadow: none;
}

.questions-btn {
    background: rgba(59, 130, 246, 0.14);
    color: var(--text-light);
    border: 1px solid rgba(59, 130, 246, 0.28);
}

.questions-btn:hover {
    background: rgba(59, 130, 246, 0.22);
}

.questions-modal {
    position: fixed;
    inset: 0;
    z-index: 10010;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.questions-modal.active {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
}

.questions-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.82);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.questions-modal-content {
    position: relative;
    z-index: 1;
    width: min(1280px, calc(100vw - 48px));
    max-height: min(92vh, 980px);
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, rgba(32, 32, 38, 0.98), rgba(24, 24, 30, 0.98));
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    transform: translateY(20px) scale(0.98);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.questions-modal.active .questions-modal-content {
    transform: translateY(0) scale(1);
}

.questions-modal-header {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    padding: 12px 16px 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.questions-modal-heading {
    display: none;
}

.questions-modal-title {
    display: none;
}

.questions-modal-subtitle {
    display: none;
}

.questions-modal-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 14px 28px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(255, 255, 255, 0.02);
}

.questions-tabs {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.questions-tab {
    min-width: 120px;
    height: 38px;
    background: rgba(255, 255, 255, 0.04);
    color: #b0b0b0;
    border: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 13px;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.questions-tab.active,
.questions-tab:hover {
    background: rgba(59, 130, 246, 0.18);
    border-color: rgba(59, 130, 246, 0.4);
    color: var(--text-light);
}

.questions-tab.active {
    background: rgba(59, 130, 246, 0.25);
    box-shadow: 0 2px 12px rgba(59, 130, 246, 0.2);
}

.questions-paper-picker {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: min(100%, 340px);
}

.questions-picker-label {
    color: var(--secondary-color);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.questions-paper-dropdown {
    min-width: min(100%, 280px);
    flex: 1;
}

.questions-modal-body {
    padding: 0;
    flex: 1;
    min-height: 0;
    display: flex;
}

.questions-paper-panel {
    display: none;
}

.questions-paper-panel.active {
    display: block;
}

.questions-panel {
    display: none;
}

.questions-paper-panel.active .questions-panel.active {
    display: block;
}

/* Paper summary removed — no longer rendered */
.questions-paper-summary {
    display: none;
}

.questions-paper-link {
    display: none;
}

.questions-modal-layout {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}

.questions-paper-panels {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
}

.questions-paper-panel.active {
    display: block;
    max-height: none;
    overflow: visible;
}

@media (min-width: 900px) {
    .questions-modal-layout {
        flex-direction: row;
        gap: 0;
    }
    
    .questions-paper-panels {
        flex: 1;
        min-width: 0;
        min-height: 0;
        overflow-y: auto;
        overflow-x: hidden;
    }
    
    .answer-panel.visible {
        width: 48%;
        max-width: 640px;
        min-width: 420px;
        flex-shrink: 0;
        overflow: hidden;
        border-top: none;
        border-left: 1px solid rgba(255, 255, 255, 0.08);
    }
}

.question-card-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 24px 28px 32px;
}

.question-card {
    padding: 22px 24px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.question-card:hover {
    background: rgba(255, 255, 255, 0.045);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
    transform: translateY(-1px);
}

.question-card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 14px;
}

.question-card-meta {
    display: flex;
    align-items: center;
    gap: 0;
    flex-wrap: wrap;
    min-width: 0;
}

.question-meta-inline {
    display: inline-flex;
    align-items: center;
    gap: 0;
    flex-wrap: wrap;
}

.question-meta-separator {
    color: #555;
    font-size: 12px;
    margin: 0 8px;
    user-select: none;
}

.question-number,
.question-subquestion,
.question-marks {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.question-number {
    color: #9bc4ff;
    background: rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.25);
}

.question-subquestion {
    color: #a0a0a0;
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.1);
    text-transform: uppercase;
    font-size: 12px;
    padding: 4px 8px;
}

.question-marks {
    color: #5eead4;
    background: rgba(94, 234, 212, 0.1);
    border-color: rgba(94, 234, 212, 0.2);
    font-size: 12px;
}

.question-card-text {
    color: #e8e8e8;
    font-size: 15.5px;
    line-height: 1.7;
    margin: 0;
    font-weight: 400;
}

.generate-answer-btn {
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: var(--text-light);
    border: none;
    flex-shrink: 0;
    padding: 0 18px;
    height: 36px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 8px;
    letter-spacing: 0.01em;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.25);
}

.generate-answer-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, #4b8aff, #1d4ed8);
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
    transform: translateY(-1px);
}

.generate-answer-btn:active:not(:disabled) {
    transform: translateY(0);
}

.generate-answer-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.generate-answer-btn.generating {
    background: linear-gradient(135deg, #4a5568, #2d3748);
    box-shadow: none;
}

.questions-empty-state {
    padding: 24px 16px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed rgba(255, 255, 255, 0.08);
    margin: 10px 16px;
}

.questions-empty-state h3 {
    margin-bottom: 6px;
    font-size: 15px;
    color: var(--text-light);
}

.questions-empty-state p {
    color: #aaa;
    line-height: 1.5;
    font-size: 13px;
}

.metadata-table-wrap {
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
    margin: 16px 20px;
}

.metadata-table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(255, 255, 255, 0.03);
}

.metadata-table th,
.metadata-table td {
    padding: 14px 18px;
    text-align: left;
    font-size: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    vertical-align: top;
}

.metadata-table th {
    width: 180px;
    color: #9bc4ff;
    font-weight: 600;
    background: rgba(59, 130, 246, 0.08);
}

.metadata-table td {
    color: #ececec;
}

.metadata-table tr:last-child th,
.metadata-table tr:last-child td {
    border-bottom: none;
}

.metadata-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.metadata-watermark-row td {
    font-style: italic;
    color: #aaa;
    font-size: 13px;
}

/* Answer panel — clean, spacious design */
.answer-panel {
    display: none;
    flex-direction: column;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #1a1a20 0%, #141418 100%);
    border-left: 1px solid rgba(255, 255, 255, 0.06);
    overflow: hidden;
}

.answer-panel.visible {
    display: flex;
}

.answer-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.02);
    flex-shrink: 0;
}

.answer-panel-title-wrap {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}

.answer-panel-header h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-light);
    margin: 0;
    line-height: 1.2;
    letter-spacing: -0.01em;
}

.answer-panel-meta {
    font-size: 13px;
    color: #888;
    font-weight: 500;
}

.answer-panel-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    padding: 0;
}

.answer-panel-close:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.answer-panel-close svg {
    width: 18px;
    height: 18px;
    color: #aaa;
    transition: color 0.2s ease;
}

.answer-panel-close:hover svg {
    color: #fff;
}

.answer-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 28px 32px;
    color: #e8e8e8;
    line-height: 1.85;
    font-size: 15.5px;
}

.answer-panel-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    height: 100%;
    color: #666;
    text-align: center;
    padding: 40px 20px;
}

.answer-panel-empty .empty-icon {
    width: 56px;
    height: 56px;
    opacity: 0.4;
}

.answer-panel-empty p {
    font-size: 15px;
    margin: 0;
}

.answer-panel-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    height: 100%;
    color: #888;
    padding: 40px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.answer-panel-summary {
    flex-shrink: 0;
    background: linear-gradient(180deg, rgba(30, 30, 38, 0.98), rgba(24, 24, 30, 0.98));
    border-top: 1px solid rgba(59, 130, 246, 0.25);
    padding: 20px 32px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.answer-panel-summary-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.summary-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.answer-panel-summary-text {
    font-size: 14.5px;
    line-height: 1.75;
    color: #c8c8c8;
}

.summary-keyword {
    color: #5eead4;
    font-weight: 600;
    background: rgba(94, 234, 212, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 13.5px;
}

.markdown-answer {
    max-width: 720px;
}

.markdown-answer h1,
.markdown-answer h2,
.markdown-answer h3,
.markdown-answer h4,
.markdown-answer h5,
.markdown-answer h6 {
    color: #fff;
    margin: 28px 0 16px;
    line-height: 1.35;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.markdown-answer h1 { 
    font-size: 24px; 
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 0;
}
.markdown-answer h2 { 
    font-size: 20px; 
    color: #f0f0f0;
}
.markdown-answer h3 { 
    font-size: 17px; 
    color: #e8e8e8;
}
.markdown-answer h4 { 
    font-size: 15px; 
    color: #ddd;
}

.markdown-answer p {
    margin: 0 0 18px;
}

.markdown-answer ul,
.markdown-answer ol {
    margin: 0 0 20px;
    padding-left: 28px;
}

.markdown-answer li {
    margin-bottom: 10px;
    padding-left: 4px;
}

.markdown-answer li::marker {
    color: var(--primary-color);
}

.markdown-answer code {
    background: rgba(59, 130, 246, 0.12);
    color: #9bc4ff;
    padding: 3px 8px;
    border-radius: 5px;
    font-size: 13.5px;
    font-family: 'JetBrains Mono', 'Consolas', 'Monaco', monospace;
}

.markdown-answer strong {
    color: #fff;
    font-weight: 600;
}

.markdown-answer em {
    color: #bbb;
    font-style: italic;
}

.markdown-answer blockquote {
    border-left: 3px solid var(--primary-color);
    margin: 20px 0;
    padding: 12px 20px;
    background: rgba(59, 130, 246, 0.05);
    border-radius: 0 8px 8px 0;
}

.markdown-answer hr {
    border: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin: 28px 0;
}

/* Mobile Control Bar - Hidden by default, shown only on mobile */
.mobile-control-bar {
    display: none;
    background: #1e1e1e;
    padding: 12px 16px;
    gap: 16px;
    align-items: center;
    justify-content: center;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
    z-index: 50;
}

.mobile-control-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.mobile-control-label {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
    flex-shrink: 0;
}

.mobile-exam-dropdown,
.mobile-paper-dropdown {
    min-width: 110px;
    height: 36px;
}

.mobile-exam-dropdown .dropdown-selected,
.mobile-paper-dropdown .dropdown-selected {
    height: 36px;
    font-size: 12px;
    padding: 0 12px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
}

.mobile-exam-dropdown .dropdown-selected:hover,
.mobile-paper-dropdown .dropdown-selected:hover,
.mobile-exam-dropdown.open .dropdown-selected,
.mobile-paper-dropdown.open .dropdown-selected {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
}

.mobile-exam-dropdown .dropdown-options,
.mobile-paper-dropdown .dropdown-options {
    bottom: calc(100% + 6px);
    top: auto;
    left: 0;
    right: auto;
    min-width: 140px;
    max-height: 200px;
    border-radius: 8px;
    background: #2a2a2a;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    transform: translateY(8px);
}

.mobile-exam-dropdown.open .dropdown-options,
.mobile-paper-dropdown.open .dropdown-options {
    transform: translateY(0);
}

.mobile-paper-dropdown {
    min-width: 150px;
    max-width: 200px;
}

.mobile-paper-dropdown .dropdown-options {
    min-width: 180px;
    max-width: 280px;
}

.mobile-exam-dropdown .dropdown-option.disabled,
.mobile-paper-dropdown .dropdown-option.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

@media (max-width: 1024px) {
    header {
        padding: 0 12px;
        gap: 12px;
    }

    .header-center {
        gap: 16px;
    }

    .control-group {
        gap: 6px;
    }

    .subject-badge {
        font-size: 14px;
        max-width: 220px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height-mobile: 42px;
    }

    header {
        height: var(--header-height-mobile);
        min-height: var(--header-height-mobile);
        padding: 6px 10px;
        gap: 8px;
        flex-wrap: nowrap;
    }

    .header-info {
        gap: 8px;
        flex: 1;
        min-width: 0;
    }

    .header-info h1 {
        font-size: 15px;
        min-width: auto;
    }

    .subject-badge {
        font-size: 12px;
        height: 32px;
        padding: 0 10px;
        margin-left: 0;
        max-width: none;
        flex: 1;
        min-width: 0;
    }

    .header-center {
        display: none;
    }

    .header-controls {
        gap: 8px;
        flex-shrink: 0;
    }

    .control-group {
        height: 32px;
        gap: 6px;
    }

    .control-group label {
        display: none;
    }

    /* Hide layout dropdown on mobile */
    #pdf-count-dropdown {
        display: none;
    }

    /* Hide header exam buttons on mobile - moved to bottom bar */
    .header-center .exam-type-buttons {
        display: none;
    }

    /* Show mobile control bar */
    .mobile-control-bar {
        display: flex;
    }

    .exam-type-buttons {
        gap: 6px;
        height: 32px;
    }

    .exam-toggle-group {
        height: 32px;
        padding: 2px;
        gap: 2px;
    }

    .exam-toggle-btn {
        height: 28px;
        font-size: 11px;
        padding: 0 10px;
        min-width: 60px;
    }

    .custom-dropdown {
        min-width: 0;
        height: 32px;
    }

    .dropdown-selected {
        height: 32px;
        font-size: 12px;
        padding: 0 10px;
    }

    .dropdown-arrow {
        width: 10px;
        height: 10px;
        margin-left: 6px;
    }

    button,
    .watermark-toggle button {
        height: 32px;
        font-size: 12px;
        padding: 0 10px;
        gap: 5px;
    }

    .btn-text,
    .watermark-toggle .wm-label {
        display: none;
    }

    .watermark-toggle button {
        min-width: 32px;
        padding: 0 8px;
    }

    .icon {
        width: 15px;
        height: 15px;
    }

    #pdf-container {
        height: calc(100vh - var(--header-height-mobile) - 52px);
        height: calc(100dvh - var(--header-height-mobile) - 52px);
    }

    /* Hide in-viewer paper selector on mobile - using bottom bar instead */
    .paper-selector {
        display: none;
    }

    .paper-selector-label {
        font-size: 9px;
        letter-spacing: 0.06em;
    }

    .paper-selector .custom-dropdown {
        min-width: 140px;
        max-width: 220px;
        height: 30px;
    }

    .paper-selector .dropdown-selected {
        height: 30px;
        padding: 0 12px;
        font-size: 11px;
        border-radius: 100px;
    }

    .dropdown-option {
        padding: 8px 10px;
        font-size: 12px;
    }

    .loader {
        width: 32px;
        height: 32px;
        border-width: 3px;
    }

    .no-pdf-message {
        padding: 24px 16px;
        font-size: 14px;
    }

    .rotation-content {
        padding: 24px 16px;
        gap: 18px;
    }

    .rotation-content p {
        font-size: 14px;
    }

    .rotation-icon {
        width: 56px;
        height: 56px;
    }

    .download-modal-content {
        width: 94%;
        border-radius: 10px;
    }

    .download-modal-header {
        padding: 16px 18px;
        gap: 12px;
    }

    .download-header-content {
        gap: 12px;
    }

    .download-modal-title {
        font-size: 16px;
    }

    .download-status-text {
        font-size: 12px;
    }

    .download-percentage {
        font-size: 11px;
    }

    .download-progress-bar {
        height: 4px;
    }

    .download-modal-body {
        padding: 16px 18px;
        gap: 12px;
    }

    .download-option {
        flex-direction: column;
        align-items: stretch;
        padding: 14px;
        gap: 12px;
    }

    .download-option-title {
        font-size: 14px;
    }

    .download-option-desc {
        font-size: 11px;
    }

    .download-zip-btn {
        width: 100%;
        justify-content: center;
        padding: 11px 18px;
        font-size: 12px;
    }

    .questions-modal-content {
        width: calc(100vw - 16px);
        max-height: calc(100vh - 16px);
        border-radius: 16px;
    }

    .questions-modal-header {
        padding: 12px 16px;
    }

    .questions-modal-toolbar {
        padding: 12px 16px;
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .question-card-list {
        padding: 16px 20px 20px;
    }

    .question-card {
        padding: 18px 20px;
    }

    .question-card-top {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .generate-answer-btn {
        width: 100%;
        justify-content: center;
        height: 40px;
    }

    .questions-paper-picker {
        width: 100%;
        min-width: 0;
    }

    .questions-paper-dropdown {
        width: 100%;
    }

    .metadata-table th,
    .metadata-table td {
        display: block;
        width: 100%;
    }

    .metadata-table th {
        border-bottom: none;
        padding-bottom: 6px;
    }

    .metadata-table td {
        padding-top: 0;
    }

    .answer-panel {
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 100;
        background: #141418;
    }

    .answer-panel-header {
        padding: 16px 20px;
    }

    .answer-panel-header h3 {
        font-size: 20px;
    }

    .answer-panel-body {
        padding: 20px 24px;
        font-size: 15px;
        line-height: 1.75;
    }

    .answer-panel-summary {
        padding: 16px 24px;
    }

    .answer-panel-summary-text {
        font-size: 13.5px;
    }

    .markdown-answer h1 { font-size: 22px; }
    .markdown-answer h2 { font-size: 18px; }
    .markdown-answer h3 { font-size: 16px; }

    .markdown-answer ul,
    .markdown-answer ol {
        padding-left: 24px;
    }

    .answer-panel {
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 100;
        background: #141418;
    }

    .answer-panel-header {
        padding: 16px 20px;
    }

    .answer-panel-header h3 {
        font-size: 20px;
    }

    .answer-panel-body {
        padding: 20px 24px;
        font-size: 15px;
        line-height: 1.75;
    }

    .answer-panel-summary {
        padding: 16px 24px;
    }

    .answer-panel-summary-text {
        font-size: 13.5px;
    }

    .markdown-answer h1 { font-size: 22px; }
    .markdown-answer h2 { font-size: 18px; }
    .markdown-answer h3 { font-size: 16px; }

    .markdown-answer ul,
    .markdown-answer ol {
        padding-left: 24px;
    }
}

@media (max-width: 480px) {
    :root {
        --header-height-mobile: 44px;
    }

    header {
        padding: 6px 10px;
        gap: 8px;
    }

    .header-info {
        gap: 6px;
    }

    .header-info h1 {
        font-size: 14px;
    }

    .subject-badge {
        font-size: 11px;
        height: 30px;
        padding: 0 8px;
    }

    .header-controls {
        gap: 6px;
    }

    .exam-type-buttons {
        gap: 5px;
        height: 30px;
    }

    .exam-toggle-group {
        height: 30px;
    }

    .exam-toggle-btn {
        height: 26px;
        font-size: 10px;
        padding: 0 8px;
        min-width: 54px;
    }

    .control-group {
        height: 30px;
        gap: 5px;
    }

    .custom-dropdown {
        height: 30px;
    }

    .dropdown-selected {
        height: 30px;
        font-size: 11px;
        padding: 0 8px;
    }

    .dropdown-arrow {
        width: 9px;
        height: 9px;
        margin-left: 5px;
    }

    button,
    .watermark-toggle button {
        height: 30px;
        font-size: 11px;
        padding: 0 8px;
        gap: 4px;
    }

    .watermark-toggle button {
        min-width: 30px;
        padding: 0 7px;
    }

    .icon {
        width: 14px;
        height: 14px;
    }

    /* Paper selector stays hidden on mobile - using bottom bar */
    .paper-selector {
        display: none;
    }

    .paper-selector-label {
        font-size: 8px;
    }

    .paper-selector .custom-dropdown {
        min-width: 120px;
        max-width: 180px;
        height: 28px;
    }

    .paper-selector .dropdown-selected {
        height: 28px;
        font-size: 10px;
        padding: 0 10px;
        border-radius: 100px;
    }

    .download-modal-header {
        padding: 14px 16px;
    }

    .download-modal-title {
        font-size: 15px;
    }

    .download-status-text {
        font-size: 11px;
    }

    .download-percentage {
        font-size: 10px;
    }

    .download-modal-body {
        padding: 14px 16px;
        gap: 10px;
    }

    .download-option {
        padding: 12px;
    }

    .download-option-title {
        font-size: 13px;
    }

    .download-option-desc {
        font-size: 11px;
    }

    .download-zip-btn {
        padding: 10px 16px;
        font-size: 12px;
    }

    /* Mobile control bar adjustments for small screens */
    .mobile-control-bar {
        padding: 10px 12px;
        gap: 12px;
    }

    .mobile-control-label {
        font-size: 10px;
    }

    .mobile-exam-dropdown,
    .mobile-paper-dropdown {
        min-width: 100px;
        height: 32px;
    }

    .mobile-exam-dropdown .dropdown-selected,
    .mobile-paper-dropdown .dropdown-selected {
        height: 32px;
        font-size: 11px;
        padding: 0 10px;
    }

    .mobile-paper-dropdown {
        min-width: 130px;
        max-width: 160px;
    }
}

@media (max-width: 768px) and (orientation: landscape) {
    :root {
        --header-height-mobile: 44px;
    }

    header {
        padding: 6px 10px;
    }

    #pdf-container {
        height: calc(100vh - var(--header-height-mobile) - 52px);
        height: calc(100dvh - var(--header-height-mobile) - 52px);
    }
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .rotation-icon {
        animation: none;
    }
}

@media print {

    header,
    .paper-selector,
    .rotation-prompt,
    .seo-content,
    .download-modal,
    .mobile-control-bar {
        display: none !important;
    }

    body {
        overflow: visible;
    }

    #pdf-container {
        height: auto;
    }
}