/**
 * responsive.css - 소리튠 영어공부법 반응형 스타일
 * Location: /assets/css/responsive.css
 */

/* ==========================================
   Desktop Large (1400px+)
   ========================================== */
@media (min-width: 1400px) {
    .container {
        padding: 0 var(--space-md);
    }

    .hero-title {
        font-size: 5rem;
    }
}

/* ==========================================
   Desktop (992px - 1399px)
   ========================================== */
@media (min-width: 992px) {
    .main-nav {
        display: block;
    }

    .mobile-menu-toggle {
        display: none;
    }

    .mobile-nav {
        display: none;
    }
}

/* ==========================================
   Tablet & Small Desktop (768px - 991px)
   ========================================== */
@media (max-width: 991px) {
    /* Header */
    .main-nav {
        display: none;
    }

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

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

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

    /* Location */
    .location-grid {
        grid-template-columns: 1fr;
    }

    /* Pricing */
    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-10px);
    }

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

/* ==========================================
   Tablet (576px - 767px)
   ========================================== */
@media (max-width: 767px) {
    :root {
        --space-lg: 3rem;
        --space-xl: 4rem;
    }

    /* Typography */
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }

    /* Hero */
    .hero {
        min-height: auto;
        padding: 120px 0 80px;
    }

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

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        gap: var(--space-md);
    }

    .hero-stat-number {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }

    /* Slider */
    .slider-nav {
        display: none;
    }

    .slider-slide-content {
        min-height: 350px;
        padding: var(--space-md) var(--space-sm);
    }

    .slide-inner {
        max-width: 100%;
        padding: 0;
    }

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

    .slide-text {
        font-size: 1rem;
    }

    /* Cards */
    .service-card {
        flex-direction: column;
        text-align: center;
    }

    .service-card .card-icon {
        margin: 0 auto;
    }

    /* Testimonials */
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .testimonial-text {
        padding-left: 0;
    }

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

    .footer-brand {
        max-width: 100%;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-legal {
        justify-content: center;
    }

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

    /* Grid utilities */
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    /* Sound Blocks */
    .sound-blocks {
        flex-direction: column;
    }

    .sound-block {
        width: 100%;
    }

    /* Learning Phases */
    .learning-phases {
        grid-template-columns: 1fr;
    }

    /* Pricing */
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    /* Portfolio */
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   Mobile (0 - 575px)
   ========================================== */
@media (max-width: 575px) {
    :root {
        --space-md: 1.5rem;
        --space-lg: 2rem;
        --space-xl: 3rem;
    }

    html {
        font-size: 15px;
    }

    /* Container */
    .container {
        padding: 0 15px;
    }

    /* Header */
    .site-header {
        padding: 10px 0;
    }

    .logo img {
        height: 35px;
    }

    .logo-text {
        font-size: 1.2rem;
    }

    /* Mobile Nav */
    .mobile-nav a {
        font-size: 1.25rem;
    }

    /* Hero */
    .hero {
        padding: 100px 0 60px;
    }

    .hero-badge {
        font-size: 0.8rem;
        padding: 6px 15px;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: var(--space-sm);
    }

    /* Buttons */
    .btn {
        padding: 12px 24px;
        font-size: 0.95rem;
    }

    .btn-lg {
        padding: 14px 28px;
        font-size: 1rem;
    }

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

    .feature-card {
        padding: var(--space-md);
    }

    .card-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    /* Section Title */
    .section-title {
        margin-bottom: var(--space-md);
    }

    .section-title h2::after {
        width: 40px;
    }

    /* Team */
    .team-card-image {
        width: 120px;
        height: 120px;
        font-size: 3rem;
    }

    /* Slider */
    .slider-slide {
        padding: 0 5px;
    }

    .slider-slide-content {
        min-height: 320px;
        padding: var(--space-sm);
    }

    .slide-inner {
        max-width: 100%;
        padding: 0 5px;
    }

    .slide-title {
        font-size: 1.2rem;
        line-height: 1.3;
        margin-bottom: var(--space-xs);
    }

    .slide-text {
        font-size: 0.9rem;
        line-height: 1.6;
    }

    /* FAQ */
    .faq-question {
        padding: var(--space-sm);
        font-size: 0.95rem;
    }

    .faq-answer-inner {
        padding: 0 var(--space-sm) var(--space-sm);
    }

    /* Contact Form */
    .contact-form,
    .contact-info {
        padding: var(--space-sm);
    }

    .form-input,
    .form-textarea {
        padding: 12px 15px;
    }

    /* Footer */
    .footer-company-info {
        padding: var(--space-sm);
        font-size: 0.8rem;
    }

    /* Blog */
    .blog-card-body {
        padding: var(--space-sm);
    }

    .blog-card-title {
        font-size: 1.1rem;
    }

    /* News */
    .news-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }

    .news-date {
        margin-left: 0;
    }

    /* Career */
    .career-card {
        flex-direction: column;
        align-items: flex-start;
    }

    /* Waveform */
    .waveform-container {
        padding: var(--space-sm);
    }

    .waveform {
        height: 60px;
    }
}

/* ==========================================
   Touch Device Optimizations
   ========================================== */
@media (hover: none) and (pointer: coarse) {
    /* Remove hover effects on touch devices */
    .card:hover {
        transform: none;
    }

    .card:hover::before {
        transform: scaleX(0);
    }

    .btn-primary:hover {
        transform: none;
    }

    .portfolio-item-overlay {
        opacity: 1;
        background: linear-gradient(to top, rgba(10, 10, 26, 0.7), transparent);
    }

    /* Increase tap targets */
    .main-nav a,
    .mobile-nav a {
        padding: 12px;
    }

    .btn {
        min-height: 48px;
    }

    .faq-question {
        min-height: 60px;
    }
}

/* ==========================================
   High DPI / Retina Displays
   ========================================== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    body::before {
        background-size: 300px 300px;
    }
}

/* ==========================================
   Print Styles
   ========================================== */
@media print {
    body {
        background: white;
        color: black;
    }

    body::before {
        display: none;
    }

    .site-header,
    .site-footer,
    .mobile-menu-toggle,
    .slider-nav,
    .slider-pagination,
    .btn {
        display: none !important;
    }

    .card,
    .testimonial-card,
    .blog-card {
        background: #f5f5f5;
        border: 1px solid #ddd;
        box-shadow: none;
    }

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

    .text-gradient {
        background: none;
        -webkit-text-fill-color: #333;
    }
}

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

    .reveal {
        opacity: 1;
        transform: none;
    }

    .floating-element {
        animation: none;
    }

    body::before {
        animation: none;
    }
}

/* ==========================================
   Dark Mode Support (Already dark by default)
   ========================================== */
@media (prefers-color-scheme: light) {
    /* Site is already dark themed, but you can add light mode overrides here */
}

/* ==========================================
   Landscape Mobile
   ========================================== */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 80px 0 40px;
    }

    .hero-stats {
        margin-top: var(--space-md);
    }
}

/* ==========================================
   Blog Post Page Responsive
   ========================================== */
@media (max-width: 767px) {
    .blog-post-content {
        padding: var(--space-sm);
    }

    .blog-post-content h2 {
        font-size: 1.3rem;
    }

    .blog-post-content h3 {
        font-size: 1.1rem;
    }

    .blog-navigation {
        grid-template-columns: 1fr;
    }

    .blog-nav-link.next {
        text-align: left;
    }

    .blog-share-buttons {
        flex-direction: column;
    }

    .blog-share-buttons .btn {
        width: 100%;
    }
}

/* ==========================================
   Legal Pages Responsive
   ========================================== */
@media (max-width: 767px) {
    .legal-content {
        padding: var(--space-sm);
    }

    .legal-section h2 {
        font-size: 1.1rem;
    }

    .legal-table {
        font-size: 0.8rem;
    }

    .legal-table th,
    .legal-table td {
        padding: var(--space-xs);
    }
}

/* ==========================================
   Sitemap Page Responsive
   ========================================== */
@media (max-width: 767px) {
    .sitemap-grid {
        grid-template-columns: 1fr;
    }

    .sitemap-external {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   Sound Tuning Page Responsive
   ========================================== */
@media (max-width: 767px) {
    .frequency-bar.korean,
    .frequency-bar.english {
        width: 100%;
    }

    .filter-diagram {
        gap: var(--space-xs);
    }

    .process-step {
        flex-direction: column;
        text-align: center;
    }

    .step-number {
        margin-bottom: var(--space-xs);
    }
}

/* ==========================================
   Learning Phases Page Responsive
   ========================================== */
@media (max-width: 991px) {
    .phase-content .grid-2 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767px) {
    .phase-header {
        padding: var(--space-md);
    }

    .phase-header h2 {
        font-size: 1.4rem;
    }

    .phase-content {
        padding: var(--space-sm);
    }

    .timeline {
        padding-left: var(--space-md);
    }

    .timeline-marker {
        left: calc(-1 * var(--space-md) - 5px);
        width: 24px;
        height: 24px;
        font-size: 0.6rem;
    }

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

    .schedule-item {
        flex-direction: column;
        text-align: center;
    }

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

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