/* ========================================
   PDF Pro Tools - Responsive Stylesheet
   ======================================== */

/* Large screens */
@media (max-width: 1200px) {
    .tools-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
}

/* Medium screens */
@media (max-width: 992px) {
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .about-visual {
        height: 300px;
        order: -1;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-brand {
        grid-column: 1 / -1;
    }
}

/* Tablets */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-xl);
        gap: var(--space-md);
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        font-size: var(--font-size-lg);
        padding: var(--space-md) 0;
    }
    
    .hero {
        padding: calc(72px + var(--space-2xl)) var(--space-lg) var(--space-2xl);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .hero-stats {
        gap: var(--space-xl);
    }
    
    .tools-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: var(--space-md);
    }
    
    .tool-card {
        padding: var(--space-lg);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .feature-card {
        padding: var(--space-lg);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .floating-card {
        padding: var(--space-md);
    }
    
    .floating-card i {
        font-size: 1.5rem;
    }
    
    .card-1 { left: 5%; }
    .card-2 { right: 5%; }
    .card-3 { left: 10%; }
    .card-4 { right: 5%; }
    
    .tool-container {
        padding: var(--space-2xl) var(--space-lg);
    }
    
    .upload-area {
        padding: var(--space-2xl) var(--space-lg);
    }
    
    .upload-icon {
        width: 64px;
        height: 64px;
        font-size: 1.5rem;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons .btn {
        width: 100%;
    }
    
    .options-panel {
        padding: var(--space-lg);
    }
    
    .file-item {
        flex-wrap: wrap;
    }
    
    .file-info {
        width: calc(100% - 60px);
    }
    
    .toast-container {
        left: var(--space-md);
        right: var(--space-md);
        bottom: var(--space-md);
    }
    
    .toast {
        min-width: auto;
        width: 100%;
    }
}

/* Mobile phones */
@media (max-width: 480px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --space-3xl: 3rem;
        --space-2xl: 2rem;
    }
    
    .container {
        padding: 0 var(--space-md);
    }
    
    .nav-container {
        padding: 0 var(--space-md);
        height: 64px;
    }
    
    .nav-menu {
        top: 64px;
    }
    
    .hero {
        padding: calc(64px + var(--space-xl)) var(--space-md) var(--space-xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .stat {
        display: flex;
        align-items: center;
        gap: var(--space-sm);
        justify-content: center;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .tool-card {
        display: flex;
        align-items: center;
        gap: var(--space-md);
        text-align: left;
    }
    
    .tool-icon {
        width: 48px;
        height: 48px;
        margin-bottom: 0;
        flex-shrink: 0;
        font-size: 1.25rem;
    }
    
    .tool-card > div:last-child {
        flex: 1;
    }
    
    .tool-name {
        font-size: var(--font-size-base);
        margin-bottom: var(--space-xs);
    }
    
    .tool-description {
        font-size: var(--font-size-xs);
    }
    
    .tool-badge {
        position: static;
        display: inline-block;
        margin-top: var(--space-xs);
    }
    
    .about-visual {
        height: 250px;
    }
    
    .floating-card {
        padding: var(--space-sm);
    }
    
    .floating-card i {
        font-size: 1.25rem;
    }
    
    .floating-card span {
        font-size: var(--font-size-xs);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .section-subtitle {
        font-size: var(--font-size-base);
    }
    
    .gradient-orb {
        filter: blur(60px);
        opacity: 0.3;
    }
    
    .orb-1 {
        width: 300px;
        height: 300px;
    }
    
    .orb-2 {
        width: 250px;
        height: 250px;
    }
    
    .orb-3 {
        width: 200px;
        height: 200px;
    }
    
    .upload-area {
        padding: var(--space-xl) var(--space-md);
    }
    
    .upload-text {
        font-size: var(--font-size-lg);
    }
    
    .upload-hint {
        font-size: var(--font-size-xs);
    }
    
    .options-panel {
        padding: var(--space-md);
    }
    
    .option-group {
        margin-bottom: var(--space-md);
    }
}

/* Small mobile phones */
@media (max-width: 360px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .tool-header h1 {
        font-size: var(--font-size-2xl);
    }
    
    .btn {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-sm);
    }
}

/* Landscape mode on mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: calc(64px + var(--space-lg)) var(--space-md);
    }
    
    .hero-stats {
        display: none;
    }
    
    .about-visual {
        height: 200px;
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .tool-icon,
    .feature-icon,
    .upload-icon {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Dark mode support (already dark by default) */
@media (prefers-color-scheme: light) {
    /* Keep dark theme regardless of system preference */
}

/* Print styles */
@media print {
    .navbar,
    .hero-background,
    .hero-buttons,
    .footer,
    .toast-container {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem 1rem;
    }
    
    .tools-grid {
        display: block;
    }
    
    .tool-card {
        break-inside: avoid;
        margin-bottom: 1rem;
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }
}