/**
 * Secure PDF Flipbook Reader — Core CSS Design System
 * 
 * Implements a premium, modern digital library style.
 * Key techniques used: CSS Grid, CSS 3D perspective transforms, SVG paper noise,
 * glassmorphism card layouts, gold-ring input focus lines, and spine shadows.
 */

/* 1. Design Variables & Global Styling */
:root {
    --bg-main: radial-gradient(circle at center, #1e293b 0%, #0f172a 60%, #020617 100%);
    --bg-header: rgba(15, 23, 42, 0.75);
    --bg-control: rgba(15, 23, 42, 0.7);
    --border-color: rgba(217, 119, 6, 0.25); /* Accent Amber/Gold border */
    
    --accent-color: #d97706; /* Amber-600 */
    --accent-hover: #f59e0b; /* Amber-500 */
    --text-primary: #f8fafc; /* Slate-50 */
    --text-secondary: #94a3b8; /* Slate-400 */
    --text-dark: #0f172a;
    
    --card-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    --page-shadow-left: -5px 5px 15px rgba(0, 0, 0, 0.25);
    --page-shadow-right: 5px 5px 15px rgba(0, 0, 0, 0.25);
    --spine-shadow: linear-gradient(to right, 
        rgba(0, 0, 0, 0.35) 0%, 
        rgba(0, 0, 0, 0.1) 40%, 
        rgba(0, 0, 0, 0) 50%, 
        rgba(0, 0, 0, 0.1) 60%, 
        rgba(0, 0, 0, 0.35) 100%
    );

    --font-heading: 'Outfit', 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

body {
    font-family: var(--font-body);
    background: var(--bg-main);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, select, button {
    font-family: var(--font-heading);
}

/* Accessible focus visible states */
button:focus-visible, 
input:focus-visible, 
select:focus-visible, 
a:focus-visible {
    outline: 2px solid var(--accent-hover);
    outline-offset: 3px;
}

/* 2. Page Header Layout */
.app-header {
    background-color: var(--bg-header);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-badge {
    background: linear-gradient(135deg, var(--accent-color) 0%, #b45309 100%);
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--text-primary);
    box-shadow: 0 0 10px rgba(217, 119, 6, 0.4);
}

.logo-text h1 {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    background: linear-gradient(to right, #ffffff, #e2e8f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text p {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.select-wrapper {
    position: relative;
}

.select-wrapper select {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 2.25rem 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
    transition: all 0.25s ease;
    appearance: none;
}

.select-wrapper select:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-color);
}

.select-wrapper::after {
    content: "▼";
    font-size: 0.65rem;
    color: var(--accent-color);
    position: absolute;
    right: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

/* 3. Main Book Reading Room */
.reading-room {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    overflow: hidden;
    perspective: 1600px;
}

#book-container {
    width: 100%;
    max-width: 1050px;
    height: 100%;
    max-height: 720px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 12px;
    transition: filter 0.4s ease;
    position: relative;
    transform-style: preserve-3d;
}

#book {
    box-shadow: var(--card-shadow);
    background-color: #0c0f16;
    border-radius: 8px;
    transform: scale(1.0);
    transition: transform 0.2s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.5s ease;
    will-change: transform;
}

/* 4. Realistic Page Aesthetics */
.book-page {
    background-color: #faf9f6;
    box-shadow: var(--page-shadow-right);
    overflow: hidden;
    position: relative;
    border-radius: 0 4px 4px 0;
}

.book-page.--left {
    box-shadow: var(--page-shadow-left);
    border-radius: 4px 0 0 4px;
}

.page-content {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.page-content canvas {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    will-change: transform;
}

/* Hardcover page overlays */
.book-page[data-density="hard"] {
    background: linear-gradient(135deg, #1e1b18 0%, #100e0d 100%) !important;
    border-right: 4px solid var(--accent-color);
    box-shadow: inset 1px 1px 0 rgba(255, 255, 255, 0.1), 
                inset -1px -1px 0 rgba(0, 0, 0, 0.5),
                var(--page-shadow-right);
}

.book-page[data-density="hard"].--left {
    border-right: none;
    border-left: 4px solid var(--accent-color);
    box-shadow: inset 1px 1px 0 rgba(255, 255, 255, 0.1), 
                inset -1px -1px 0 rgba(0, 0, 0, 0.5),
                var(--page-shadow-left);
}

.book-page[data-page-index="1"] .page-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
    color: #f59e0b;
    border: 3px double #d97706;
    margin: 10px;
    height: calc(100% - 20px);
}

.book-page::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' result='noise'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.25 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    z-index: 10;
}

.page-ambient-shadow {
    position: absolute;
    top: 0;
    width: 60px;
    height: 100%;
    z-index: 8;
    pointer-events: none;
}

.book-page.--left .page-ambient-shadow {
    right: 0;
    background: linear-gradient(to left, rgba(0, 0, 0, 0.25) 0%, rgba(0, 0, 0, 0) 100%);
}

.book-page.--right .page-ambient-shadow {
    left: 0;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.25) 0%, rgba(0, 0, 0, 0) 100%);
}

/* 5. 3D Closed Book Cover System (Pre-authentication Mockup) */
.closed-book {
    width: 480px;
    height: 680px;
    position: relative;
    transform-style: preserve-3d;
    transform: rotateX(15deg) rotateY(-20deg) scale(0.95);
    transition: transform 1.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 20px 20px 40px rgba(0, 0, 0, 0.6);
    z-index: 50;
    will-change: transform;
}

.book-cover-front {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #2c1a13 0%, #170e0a 100%);
    border-radius: 4px 16px 16px 4px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: inset 2px 2px 5px rgba(255, 255, 255, 0.1),
                inset -2px -2px 5px rgba(0, 0, 0, 0.6);
    z-index: 55;
    transform-origin: left center;
    transition: transform 1.2s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    backface-visibility: hidden;
}

.book-cover-emboss {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: calc(100% - 60px);
    height: calc(100% - 60px);
    border: 3px double #d97706;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    box-shadow: inset 0 0 15px rgba(0,0,0,0.8);
    background-color: rgba(0,0,0,0.1);
}

.book-emboss-title {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--accent-hover);
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8), -1px -1px 0 rgba(255,255,255,0.05);
    text-align: center;
}

.book-emboss-subtitle {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.book-emboss-divider {
    width: 60px;
    height: 2px;
    background-color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.book-emboss-lock {
    font-size: 3rem;
    filter: drop-shadow(0 4px 10px rgba(0,0,0,0.6));
    animation: alertPulse 2s infinite ease-in-out;
}

.book-pages-stack {
    position: absolute;
    top: 6px;
    right: -14px;
    width: 14px;
    height: calc(100% - 12px);
    background: linear-gradient(to right, #e2e8f0 0%, #cbd5e1 30%, #e2e8f0 70%, #94a3b8 100%);
    background-image: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 1.5px,
        rgba(0, 0, 0, 0.15) 1.5px,
        rgba(0, 0, 0, 0.15) 3px
    );
    transform: rotateY(90deg);
    transform-origin: left center;
    z-index: 52;
    border-radius: 0 4px 4px 0;
}

.book-spine-hinge {
    position: absolute;
    top: 2px;
    left: -12px;
    width: 15px;
    height: calc(100% - 4px);
    background: linear-gradient(to right, #170e0a 0%, #2c1a13 50%, #100e0d 100%);
    box-shadow: -5px 5px 15px rgba(0, 0, 0, 0.4);
    z-index: 54;
    border-radius: 6px 0 0 6px;
    transform: rotateY(-15deg);
}

.closed-book.unlocking {
    transform: rotateX(10deg) rotateY(-40deg) translateZ(80deg) scale(1.05);
}

.closed-book.unlocking .book-cover-front {
    transform: rotateY(-130deg);
    box-shadow: 15px 15px 30px rgba(0, 0, 0, 0.4);
}

/* 6. Navigation Control HUD bar */
.control-hud {
    background: var(--bg-control);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-color);
    padding: 0.75rem 2rem;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 1.5rem;
    z-index: 90;
    transition: opacity 0.5s ease, filter 0.5s ease;
}

.locked-controls {
    opacity: 0.25;
    pointer-events: none !important;
    filter: blur(2px);
}

.hud-section.left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.hud-section.center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    min-width: 320px;
}

.hud-section.right {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 0.5rem;
}

.btn-control {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    outline: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-control:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-hover);
    color: var(--text-primary);
    box-shadow: 0 0 12px rgba(217, 119, 6, 0.4);
    transform: translateY(-2px);
}

.btn-control:active {
    transform: translateY(0);
}

.logout-btn {
    border-color: rgba(239, 68, 68, 0.25) !important;
}

.logout-btn:hover {
    background-color: #ef4444 !important;
    border-color: #f87171 !important;
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.4) !important;
}

.nav-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    cursor: pointer;
    transition: background 0.3s ease;
}

.nav-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--accent-color);
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
    cursor: pointer;
    transition: transform 0.15s ease;
}

.nav-slider::-webkit-slider-thumb:hover {
    transform: scale(1.25);
    background-color: var(--accent-hover);
}

.page-counter {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    min-width: 70px;
    text-align: center;
    letter-spacing: 0.5px;
}

.zoom-widget {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 0.25rem 0.25rem 0.25rem 0.75rem;
}

.zoom-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
    min-width: 35px;
    text-align: center;
    font-weight: bold;
}

/* 7. Settings Sidebar Drawer */
.sidebar-panel {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    background-color: #0b0f19;
    border-right: 1px solid var(--border-color);
    z-index: 150;
    transform: translateX(-100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 15px 0 30px rgba(0, 0, 0, 0.5);
}

.sidebar-panel.open {
    transform: translateX(0);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h2 {
    font-size: 1rem;
    font-weight: bold;
    color: var(--text-primary);
}

.sidebar-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
}

.sidebar-content {
    padding: 1.5rem;
}

.sidebar-section {
    margin-bottom: 2rem;
}

.sidebar-section h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-color);
    margin-bottom: 0.75rem;
}

.sidebar-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 1rem;
}

.security-status-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.security-status-list li {
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.security-status-list li::before {
    content: "🛡️";
    font-size: 0.75rem;
}

/* 8. Glassmorphic Login Dialogue Panel */
.login-card {
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid rgba(217, 119, 6, 0.25);
    border-radius: 16px;
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.7),
                inset 1px 1px 0 rgba(255, 255, 255, 0.05);
    z-index: 250;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    transform: scale(1.0);
    will-change: transform;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-padlock {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    display: inline-block;
    transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.login-padlock.unlocked {
    transform: rotate(-15deg) scale(1.15);
}

.login-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
    letter-spacing: 0.5px;
}

.login-header p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.form-field {
    margin-bottom: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-field label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-hover);
}

/* Password wrapper overlaying visibility buttons */
.password-input-wrapper {
    position: relative;
    width: 100%;
    display: flex;
}

.password-input-wrapper input {
    width: 100%;
    padding-right: 3rem !important; /* Make sure text doesn't overlap eye button */
}

.btn-toggle-password {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.btn-toggle-password:hover {
    color: var(--accent-hover);
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-toggle-password svg {
    pointer-events: none;
    transition: transform 0.25s ease;
}

.btn-toggle-password:active svg {
    transform: scale(0.85);
}

.form-field input {
    background-color: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    outline: none;
    transition: all 0.25s ease;
}

.form-field input:focus {
    border-color: var(--accent-color);
    background-color: rgba(0, 0, 0, 0.6);
    box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.25);
}

/* Grid layout for Remember and Forgot password links */
.form-options {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.remember-me input {
    display: none;
}

.checkbox-box {
    width: 16px;
    height: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    background-color: rgba(0,0,0,0.4);
    display: inline-block;
    position: relative;
    transition: all 0.2s ease;
}

.remember-me input:checked + .checkbox-box {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

.remember-me input:checked + .checkbox-box::after {
    content: "✓";
    font-size: 0.65rem;
    color: var(--text-primary);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Forgot password links connected to WhatsApp */
.forgot-password-link {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    transition: all 0.25s ease;
    cursor: pointer;
}

.forgot-password-link:hover {
    color: #22c55e; /* WhatsApp green on hover */
    text-shadow: 0 0 8px rgba(34, 197, 94, 0.4);
}

.whatsapp-icon {
    transition: transform 0.25s ease;
}

.forgot-password-link:hover .whatsapp-icon {
    transform: scale(1.2) rotate(10deg);
}

.login-error-msg {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
    font-size: 0.8rem;
    padding: 0.6rem;
    border-radius: 6px;
    margin-bottom: 1.25rem;
    text-align: center;
}

.btn-login-submit {
    width: 100%;
    padding: 0.85rem;
    background: linear-gradient(135deg, var(--accent-color) 0%, #b45309 100%);
    border: none;
    border-radius: 8px;
    color: var(--text-primary);
    font-weight: bold;
    font-size: 0.95rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(217, 119, 6, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    transition: all 0.25s ease;
}

.btn-login-submit:hover:not(:disabled) {
    box-shadow: 0 4px 20px rgba(217, 119, 6, 0.5);
    transform: translateY(-1px);
}

.btn-login-submit:active:not(:disabled) {
    transform: translateY(0);
}

.btn-login-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    box-shadow: none;
}

.btn-spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spinnerRotate 0.8s linear infinite;
}

.btn-login-submit.loading .btn-text {
    opacity: 0;
}

.btn-login-submit.loading .btn-spinner {
    display: block;
    position: absolute;
}

.btn-login-submit.success {
    background: #10b981;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

/* 9. Security Interruption Overlays & Shields */
.blurred-shield {
    filter: blur(22px) grayscale(30%);
    pointer-events: none !important;
}

.hard-blurred-shield {
    filter: blur(35px) brightness(50%) grayscale(100%);
    pointer-events: none !important;
}

.security-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(2, 6, 23, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    transition: opacity 0.5s ease;
}

.security-overlay.fade-out {
    opacity: 0;
    pointer-events: none;
}

.overlay-content {
    background-color: #0f172a;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    text-align: center;
    max-width: 400px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

.overlay-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.overlay-content h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 0.75rem;
}

.overlay-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

#printscreen-shield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: #020617;
    z-index: 999;
}

.hidden {
    display: none !important;
}

.toast-notice {
    position: fixed;
    bottom: 5.5rem;
    left: 50%;
    transform: translate(-50%, 20px);
    background-color: rgba(15, 23, 42, 0.95);
    border: 1px solid var(--accent-color);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    pointer-events: none;
    z-index: 300;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast-notice.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

.toast-text {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* 10. Render Errors */
.render-error {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #faf9f6;
    color: #b91c1c;
    padding: 2rem;
    text-align: center;
}

.error-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.error-msg {
    font-size: 0.85rem;
    font-weight: bold;
}