/* ===================================
   Mstkhby - Responsive Stylesheet
   =================================== */

/* Large Devices (Desktops, less than 1280px) */
@media (max-width: 1280px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .hero-content {
        gap: var(--spacing-2xl);
    }
}

/* Medium Devices (Tablets, less than 1024px) */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        max-width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-subtitle {
        max-width: 600px;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        margin: 0 auto;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .phone-mockup {
        width: 240px;
        height: 480px;
    }
    
    .floating-elements {
        display: none;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-brand {
        grid-column: span 2;
    }
}

/* Small Devices (Landscape Phones, less than 768px) */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-6xl: 3rem;
    }
    
    /* Navigation Mobile */
    .nav-menu {
        position: fixed;
        top: 70px;
        right: 0;
        left: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-xl);
        gap: var(--spacing-lg);
        transform: translateY(-150%);
        opacity: 0;
        transition: all var(--transition-base);
        box-shadow: var(--shadow-xl);
        z-index: var(--z-fixed);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .nav-actions .btn {
        display: none;
    }
    
    .theme-toggle {
        display: flex;
    }
    
    /* Hero Section */
    .hero {
        min-height: auto;
        padding-top: 90px;
        padding-bottom: var(--spacing-2xl);
    }
    
    .orb-1,
    .orb-2,
    .orb-3 {
        width: 300px;
        height: 300px;
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
        width: 100%;
    }
    
    .stat-divider {
        width: 40px;
        height: 1px;
    }
    
    /* Features Grid */
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    /* Steps Container */
    .steps-container {
        flex-direction: column;
    }
    
    .step-connector {
        transform: rotate(90deg);
    }
    
    /* Privacy Levels */
    .levels-grid {
        grid-template-columns: 1fr;
        max-width: 360px;
        margin: 0 auto;
    }
    
    .level-card.popular {
        transform: none;
    }
    
    .level-card.popular:hover {
        transform: translateY(-8px);
    }
    
    /* Pricing */
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .pricing-card.featured {
        transform: none;
        order: -1;
    }
    
    .pricing-card.featured:hover {
        transform: translateY(-8px);
    }
    
    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        grid-column: auto;
    }
    
    .social-links {
        justify-content: center;
    }
    
    /* Modal */
    .modal {
        max-height: 95vh;
        border-radius: var(--radius-xl);
    }
    
    .auth-modal,
    .send-message-modal {
        padding: var(--spacing-lg);
    }
    
    /* Message Type Selector */
    .message-type-selector {
        flex-wrap: wrap;
    }
    
    .type-option {
        flex: 1 1 calc(50% - var(--spacing-xs));
        min-width: 100px;
    }
    
    /* Identity Options */
    .identity-options {
        flex-wrap: wrap;
    }
    
    .identity-option {
        flex: 1 1 calc(50% - var(--spacing-xs));
    }
    
    /* Inbox */
    .inbox-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: stretch;
    }
    
    .inbox-filters {
        overflow-x: auto;
        padding-bottom: var(--spacing-sm);
    }
    
    .filter-btn {
        white-space: nowrap;
    }
    
    /* Profile */
    .profile-stats {
        grid-template-columns: 1fr;
    }
    
    .profile-tabs {
        overflow-x: auto;
    }
    
    /* Settings */
    .settings-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    /* Toast */
    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
    }
    
    .toast {
        min-width: auto;
        max-width: 100%;
    }
}

/* Extra Small Devices (Portrait Phones, less than 480px) */
@media (max-width: 480px) {
    :root {
        --font-size-4xl: 1.75rem;
        --font-size-5xl: 2rem;
        --font-size-6xl: 2.25rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .badge {
        font-size: var(--font-size-xs);
    }
    
    .hero-title {
        line-height: 1.2;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .phone-mockup {
        width: 180px;
        height: 360px;
        padding: 10px;
    }
    
    .phone-screen {
        padding: var(--spacing-sm);
    }
    
    .app-header {
        padding: var(--spacing-sm);
        margin-top: 20px;
    }
    
    .user-avatar {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    .user-info h3 {
        font-size: var(--font-size-xs);
    }
    
    .message-card {
        padding: var(--spacing-sm);
    }
    
    .message-text {
        font-size: var(--font-size-xs);
    }
    
    /* Auth Modal */
    .auth-tabs {
        flex-direction: column;
    }
    
    .social-auth {
        flex-direction: column;
    }
    
    /* Send Message Modal */
    .recipient-info {
        flex-direction: column;
        text-align: center;
    }
    
    .type-option {
        flex: 1 1 100%;
    }
    
    .identity-option {
        flex: 1 1 100%;
    }
    
    /* Profile Header */
    .profile-avatar {
        width: 96px;
        height: 96px;
        font-size: 2.25rem;
    }
    
    .profile-name {
        font-size: var(--font-size-xl);
    }
    
    /* Detail Actions */
    .detail-actions {
        flex-direction: column;
    }
    
    .reaction-buttons {
        justify-content: center;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .preloader,
    .modal-overlay,
    .toast-container,
    .floating-elements,
    .cta::before {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero {
        min-height: auto;
        padding-top: 0;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
}

/* Reduced Motion */
@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;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border-light: #000;
        --border-medium: #000;
        --text-secondary: #333;
        --text-tertiary: #555;
    }
    
    .btn-primary {
        border: 2px solid currentColor;
    }
    
    .feature-card,
    .level-card,
    .pricing-card,
    .message-item {
        border-width: 2px;
    }
}

/* Dark Mode System Preference */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        --surface: #1e293b;
        --surface-hover: #334155;
        
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-tertiary: #94a3b8;
        
        --border-light: #334155;
        --border-medium: #475569;
        
        --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
        --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
        --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4);
        --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5);
    }
}

/* Landscape Orientation for Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 80px 0 var(--spacing-lg);
    }
    
    .hero-visual {
        display: none;
    }
    
    .modal {
        max-height: 95vh;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 44px;
        min-width: 44px;
    }
    
    .message-actions {
        opacity: 1;
    }
    
    .nav-link::after {
        display: none;
    }
    
    .feature-card:hover,
    .level-card:hover,
    .pricing-card:hover,
    .message-item:hover {
        transform: none;
    }
}