/**
 * 소리튠 영어인강 - Responsive Stylesheet
 * Mobile-First Breakpoints
 */

/* ========== Extra Large (1400px+) ========== */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}

/* ========== Large (1200px - 1399px) ========== */
@media (max-width: 1399px) {
    .container {
        max-width: 1140px;
    }

    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }

    .footer-col.footer-contact {
        grid-column: span 4;
        margin-top: var(--space-xl);
        padding-top: var(--space-xl);
        border-top: 1px solid rgba(102, 126, 234, 0.1);
    }
}

/* ========== Medium Large (992px - 1199px) ========== */
@media (max-width: 1199px) {
    .container {
        max-width: 960px;
    }

    .header-inner {
        padding: 0 var(--space-lg);
    }

    .nav-list {
        gap: 0;
    }

    .nav-item > a {
        padding: var(--space-sm) var(--space-sm);
        font-size: var(--font-size-xs);
    }

    .hero-title {
        font-size: 3rem;
    }

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

    .about-content {
        gap: var(--space-2xl);
    }

    .contact-grid {
        gap: var(--space-2xl);
    }
}

/* ========== Medium (768px - 991px) - Tablet ========== */
@media (max-width: 991px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
    }

    .container {
        max-width: 720px;
    }

    /* Header */
    .main-nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .header-actions .btn {
        display: none;
    }

    /* Hero */
    .hero {
        min-height: auto;
        padding: var(--space-3xl) var(--space-lg);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    /* Grids */
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    /* About */
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-image {
        order: -1;
    }

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

    .footer-col.footer-about {
        grid-column: span 2;
        text-align: center;
        margin-bottom: var(--space-xl);
    }

    .footer-col.footer-about .footer-social {
        justify-content: center;
    }

    .footer-col.footer-contact {
        grid-column: span 2;
    }

    /* Contact */
    .contact-grid {
        grid-template-columns: 1fr;
    }

    /* Blog & Reviews */
    .blog-grid,
    .review-grid {
        grid-template-columns: 1fr;
    }

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

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

    /* VAK Test */
    .vak-roadmap-tabs {
        flex-wrap: wrap;
    }

    .vak-roadmap-tab {
        flex: 1 1 calc(33.333% - var(--space-sm));
    }
}

/* ========== Small (576px - 767px) - Large Mobile ========== */
@media (max-width: 767px) {
    :root {
        --space-3xl: 3rem;
        --space-2xl: 2rem;
        --space-xl: 1.5rem;
    }

    .container {
        max-width: 540px;
        padding: 0 var(--space-md);
    }

    /* Header */
    .header-inner {
        height: 60px;
        padding: 0 var(--space-md);
    }

    .logo img {
        height: 32px;
    }

    /* Main Content */
    .main-content {
        padding-top: 60px;
    }

    /* Bottom Navigation - Show on mobile */
    .bottom-nav {
        display: flex;
        justify-content: space-around;
    }

    /* Scroll Top - Adjust for bottom nav */
    .scroll-top {
        bottom: 90px;
    }

    /* Footer padding for bottom nav */
    .site-footer {
        padding-bottom: 100px;
    }

    /* Hero */
    .hero {
        padding: var(--space-2xl) var(--space-md);
    }

    .hero-badge {
        font-size: var(--font-size-xs);
        padding: var(--space-xs) var(--space-md);
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
    }

    /* Cards */
    .card {
        padding: var(--space-lg);
    }

    /* Grids */
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    /* Section */
    .section {
        padding: var(--space-2xl) 0;
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-col.footer-about,
    .footer-col.footer-contact {
        grid-column: auto;
    }

    .footer-col {
        margin-bottom: var(--space-xl);
    }

    .footer-col h4 {
        margin-bottom: var(--space-md);
    }

    .contact-info li {
        justify-content: center;
    }

    .footer-legal {
        flex-direction: column;
        gap: var(--space-sm);
    }

    /* Product */
    .product-grid {
        grid-template-columns: 1fr;
    }

    /* Team */
    .team-grid {
        grid-template-columns: 1fr;
    }

    /* Page Header */
    .page-header {
        padding: var(--space-2xl) 0 var(--space-xl);
    }

    .page-title {
        font-size: var(--font-size-2xl);
    }

    /* VAK Test */
    .vak-test-container,
    .vak-result-container {
        padding: var(--space-md);
    }

    .vak-question-text {
        font-size: var(--font-size-lg);
    }

    .vak-option {
        padding: var(--space-md);
    }

    .vak-roadmap-tab {
        flex: 1 1 100%;
    }

    /* FAQ */
    .faq-question {
        padding: var(--space-md);
        font-size: var(--font-size-sm);
    }

    /* Contact */
    .contact-info-card {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    /* Blog */
    .blog-grid {
        grid-template-columns: 1fr;
    }

    .blog-image {
        height: 180px;
    }
}

/* ========== Extra Small (< 576px) - Small Mobile ========== */
@media (max-width: 575px) {
    :root {
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.375rem;
        --font-size-2xl: 1.125rem;
        --font-size-xl: 1rem;
    }

    .container {
        padding: 0 var(--space-sm);
    }

    /* Hero */
    .hero {
        padding: var(--space-xl) var(--space-sm);
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: var(--font-size-sm);
    }

    .hero-glow {
        width: 300px;
        height: 300px;
    }

    /* Buttons */
    .btn {
        padding: var(--space-sm) var(--space-lg);
        font-size: var(--font-size-xs);
    }

    .btn-lg {
        padding: var(--space-md) var(--space-xl);
        font-size: var(--font-size-sm);
    }

    /* Cards */
    .card {
        padding: var(--space-md);
        border-radius: var(--radius-lg);
    }

    .card-icon {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }

    .card-title {
        font-size: var(--font-size-lg);
    }

    /* Section */
    .section-header {
        margin-bottom: var(--space-xl);
    }

    .section-badge {
        font-size: 10px;
    }

    /* VAK */
    .vak-result-type {
        font-size: var(--font-size-xl);
        padding: var(--space-sm) var(--space-lg);
    }

    .vak-chart-container {
        max-width: 280px;
    }

    .vak-week-title {
        font-size: var(--font-size-base);
    }

    /* Product */
    .product-image {
        height: 150px;
    }

    .product-price {
        font-size: var(--font-size-xl);
    }

    /* Team */
    .team-avatar {
        width: 100px;
        height: 100px;
        font-size: 40px;
    }

    /* Review */
    .review-card {
        padding: var(--space-md);
    }

    .review-avatar {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    /* Footer */
    .footer-top {
        padding: var(--space-2xl) 0;
    }

    .footer-logo img {
        height: 28px;
    }

    .footer-social a {
        width: 36px;
        height: 36px;
    }

    /* Mobile Menu */
    .mobile-menu {
        max-width: 100%;
    }

    .mobile-menu-header {
        padding: var(--space-md);
    }

    .mobile-nav-list {
        padding: var(--space-md);
    }

    /* Bottom Nav */
    .bottom-nav-item {
        padding: var(--space-xs);
        font-size: 10px;
    }

    .bottom-nav-item svg {
        width: 20px;
        height: 20px;
    }

    .bottom-nav-item.bottom-nav-cta::before {
        width: 44px;
        height: 44px;
    }
}

/* ========== Landscape Mobile ========== */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: var(--space-xl) var(--space-md);
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .hero-badge {
        margin-bottom: var(--space-md);
    }

    .hero-subtitle {
        margin-bottom: var(--space-lg);
    }
}

/* ========== Dark Mode / Light Mode Support ========== */
@media (prefers-color-scheme: light) {
    /* Keep dark theme for this cosmic design */
}

/* ========== 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;
    }
}

/* ========== Print Styles ========== */
@media print {
    .site-header,
    .site-footer,
    .bottom-nav,
    .scroll-top,
    .mobile-menu,
    .mobile-menu-overlay {
        display: none !important;
    }

    .main-content {
        padding-top: 0;
    }

    body {
        background: white;
        color: black;
    }

    .hero-glow,
    .hero-background {
        display: none;
    }

    a {
        color: black;
        text-decoration: underline;
    }

    .btn {
        border: 1px solid black;
        background: white;
        color: black;
        box-shadow: none;
    }

    .card {
        border: 1px solid #ccc;
        background: white;
    }
}

/* ========== High DPI / Retina Support ========== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo img {
        image-rendering: -webkit-optimize-contrast;
    }
}

/* ========== Touch Device Optimizations ========== */
@media (hover: none) and (pointer: coarse) {
    /* Remove hover effects for touch devices */
    .nav-item > a:hover,
    .submenu li a:hover,
    .card:hover,
    .btn-primary:hover,
    .btn-secondary:hover {
        transform: none;
    }

    /* Larger touch targets */
    .nav-item > a,
    .mobile-nav-list > li > a,
    .footer-links a {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    /* Better tap feedback */
    .btn,
    .card,
    .vak-option,
    .faq-question {
        -webkit-tap-highlight-color: rgba(102, 126, 234, 0.2);
    }
}

/* ========== Safe Area Insets (iPhone X+) ========== */
@supports (padding: env(safe-area-inset-bottom)) {
    .bottom-nav {
        padding-bottom: calc(var(--space-sm) + env(safe-area-inset-bottom));
    }

    .mobile-menu {
        padding-bottom: env(safe-area-inset-bottom);
    }

    .site-footer {
        padding-bottom: calc(80px + env(safe-area-inset-bottom));
    }
}