body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

h1 {
    font-size: var(--font-size-xl);
    margin: var(--space-xl) 0 var(--space-lg);
    color: var(--accent-primary);
    text-align: center;
    font-weight: 600;
    letter-spacing: 0.5px;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-primary-hover);
    text-decoration: underline;
}


.btn {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    text-align: center;
    font-size: var(--font-size-xs);
}

.btn-primary {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background-color: var(--accent-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-secondary);
}

.btn-secondary:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--text-primary);
    transform: translateY(-2px);
    text-decoration: none;
}

#pdf-container {
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin: 0 auto var(--space-xl);
    max-width: 800px;
    width: 90%;
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 1px solid var(--bg-tertiary);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

#pdf-container:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

#pdf-canvas {
    max-width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

#controls {
    display: flex;
    justify-content: center;
    flex-direction: column;
}

.nav-but, .downd-but {
    margin-top: var(--space-lg);
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
}

#controls button {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
    border: none;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-normal);
    min-width: 120px;
}

#controls button:hover {
    background-color: var(--accent-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

#controls button:active {
    transform: translateY(0);
}

#page-count {
    margin-top: var(--space-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    background-color: var(--bg-tertiary);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-md);
}


.header-container {
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    width: 100%;
    padding: var(--space-lg) 0;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.theme-toggle .icon {
    stroke: var(--accent-primary);
    transition: stroke 0.3s ease;
}

.theme-toggle .sun,
.theme-toggle .sun-rays {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.theme-toggle .moon {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

body.light-theme .sun,
body.light-theme .sun-rays {
    opacity: 1;
    transform: scale(1);
}

body.light-theme .moon {
    opacity: 0;
    transform: scale(0.8);
}

body.dark-theme .sun,
body.dark-theme .sun-rays {
    opacity: 0;
    transform: scale(0.8);
}

body.dark-theme .moon {
    opacity: 1;
    transform: scale(1);
}

@media (max-width: 768px) {
    .cookie-content, .cookie-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .cookie-buttons {
        margin-top: var(--space-md);
    }

    #controls {
        flex-direction: column;
        gap: var(--space-sm);
        width: 100%;
    }

    #controls button {
        width: 100%;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-lg);
    }

    .nav-links {
        gap: var(--space-sm);
    }

    .btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.9rem;
    }
}