/* Base styles */
* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f8f9fa;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* Splash Screen Styles */
.splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #F8F3E6;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.splash-screen.fade-out {
    opacity: 0;
    transform: translateY(-100%);
    pointer-events: none;
}

.splash-content {
    text-align: center;
    z-index: 2;
}

.korean-text {
    font-size: 2.5rem;
    font-weight: 600;
    color: #d32f2f;
    margin-bottom: 40px;
    opacity: 0;
    animation: fadeIn 1.5s ease-out forwards;
    animation-delay: 0.5s;
}

.logo-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0;
    animation: slideUpFade 1.5s ease-out forwards;
    animation-delay: 1.0s;
}

.splash-logo {
    width: 150px;
    height: auto;
    margin-bottom: 20px;
    object-fit: contain;
}

.korean-text-small {
    font-size: 1.8rem;
    font-weight: 500;
    color: #333;
    opacity: 0;
    animation: slideUpFade 1s ease-out forwards, waveEffect 2s ease-in-out infinite;
    animation-delay: 1.7s, 2.7s;
}

.vietnamese-welcome {
    margin-top: 30px;
    text-align: center;
    opacity: 0;
    animation: fadeIn 1.5s ease-out forwards;
    animation-delay: 2.5s;
}

.vietnamese-line-1 {
    font-size: 1.4rem;
    font-weight: 500;
    color: #d32f2f;
    margin-bottom: 8px;
}

.vietnamese-line-2 {
    font-size: 1.6rem;
    font-weight: 600;
    color: #333;
}

.splash-decor {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(135deg, #d32f2f 0%, #b71c1c 100%);
    clip-path: polygon(0 40%, 20% 20%, 40% 35%, 60% 15%, 80% 30%, 100% 10%, 100% 100%, 0 100%);
    opacity: 0;
    animation: fadeIn 1s ease-out forwards;
    animation-delay: 2.5s;
}

/* Main Content - Initially hidden */
.main-content {
    opacity: 0;
    transition: opacity 0.5s ease-in;
    visibility: hidden;
}

.main-content.visible {
    opacity: 1;
    visibility: visible;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes waveEffect {
    0%, 100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-5px);
    }
    75% {
        transform: translateX(5px);
    }
}

/* Mobile Responsive for Splash Screen */
@media (max-width: 767px) {
    .korean-text {
        font-size: 2rem;
        margin-bottom: 30px;
    }
    
    .splash-logo {
        width: 120px;
        margin-bottom: 15px;
    }
    
    .korean-text-small {
        font-size: 1.5rem;
    }
    
    .vietnamese-welcome {
        margin-top: 20px;
    }
    
    .vietnamese-line-1 {
        font-size: 1.2rem;
        margin-bottom: 6px;
    }
    
    .vietnamese-line-2 {
        font-size: 1.4rem;
    }
    
    .splash-decor {
        height: 40px;
    }
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header styles */
.page-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.header-logo {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: #212529;
    margin: 0;
}

/* Mobile: smaller logo */
@media (max-width: 767px) {
    .header-logo {
        height: 40px;
    }
    
    .page-header {
        gap: 12px;
    }
}

/* Menu list styles */
.menu-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-bottom: 40px;
}

.menu-card {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
}

.menu-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.menu-card:active {
    transform: translateY(0);
}

.menu-card-cover {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background-color: #e9ecef;
}

.menu-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.6) 60%, rgba(0, 0, 0, 0) 100%);
    padding: 24px 16px 16px;
    pointer-events: none;
    min-height: 120px;
    display: flex;
    align-items: flex-end;
}

.menu-card-info {
    padding: 0;
}

.menu-card-name {
    font-size: 2.5rem;
    font-weight: 600;
    color: #ffffff;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    line-height: 1.2;
}

.menu-card-name .main-title {
    display: block;
    font-size: 2.0rem;
}

.menu-card-name .subtitle {
    display: block;
    font-size: 1.25rem;
    margin-top: 4px;
}

/* Menu viewer header styles */
.menu-header {
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

.back-button {
    background: rgba(0, 0, 0, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: background 0.2s ease;
    white-space: nowrap;
    padding: 0;
    cursor: pointer;
}

.back-button i {
    font-size: 1.2rem;
    margin: 0;
}

.back-button:hover {
    background: rgba(0, 0, 0, 1);
    color: white;
}

.back-button:active {
    background: rgba(0, 0, 0, 1);
}

.menu-title-header {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Menu pages styles */
.menu-pages {
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.menu-page {
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.menu-page-img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 210 / 297;
    object-fit: contain;
    background-color: #ffffff;
}

.menu-page-loading {
    width: 100%;
    aspect-ratio: 210 / 297;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f8f9fa;
    color: #6c757d;
    font-size: 0.9rem;
}

.menu-page-error {
    width: 100%;
    aspect-ratio: 210 / 297;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f8f9fa;
    color: #dc3545;
    font-size: 0.9rem;
    text-align: center;
    padding: 20px;
}

/* Loading spinner */
.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Error message */
.alert {
    margin: 20px 0;
    border-radius: 8px;
}

/* Responsive design - Mobile first */
@media (min-width: 768px) {
    .container {
        max-width: 700px;
    }
    
    .page-title {
        font-size: 2.5rem;
    }
    
    .header-logo {
        height: 70px;
    }
    
    .menu-header {
        padding: 16px 24px;
    }
    
    .back-button {
        width: 44px;
        height: 44px;
    }
    
    .back-button i {
        font-size: 1.3rem;
    }
    
    .menu-title-header {
        font-size: 1.25rem;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 800px;
    }
    
    .menu-card-cover {
        aspect-ratio: 16 / 10;
    }
}

@media (min-width: 1440px) {
    .container {
        max-width: 900px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    .menu-card {
        transition: none;
    }
    
    .back-button {
        transition: none;
    }
}

/* Focus styles for accessibility */
.menu-card:focus,
.back-button:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

.menu-card:focus:not(:focus-visible) {
    outline: none;
}

.back-button:focus:not(:focus-visible) {
    outline: none;
}