@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #059669;
    --bg-dark: #1a1a1a;
    --bg-card: #242424;
    --bg-card-hover: #2a2a2a;
    --text-primary: #e5e5e5;
    --text-secondary: #a3a3a3;
    --text-muted: #737373;
    --border-color: #404040;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-md: 0 2px 4px 0 rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 4px 8px 0 rgba(0, 0, 0, 0.4);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(1rem, 3vw, 2rem);
}

.cdrom-card {
    position: relative;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
    border: 1px solid var(--border-color);
    overflow: hidden;
    cursor: pointer;
    background: var(--bg-card);
}

.cdrom-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    border-color: #525252;
}

.cdrom-card img {
    transition: opacity 0.2s ease;
}

.cdrom-card:hover img {
    opacity: 0.9;
}

a, button {
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

a:focus, button:focus {
    outline: none;
    box-shadow: none;
}

.modal {
    display: none;
    position: fixed;
    z-index: 101;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.75);
    opacity: 0;
    transition: opacity 0.2s ease;
    justify-content: center;
    align-items: center;
}

.modal.show {
    opacity: 1;
}

.modal-content {
    position: relative;
    background: var(--bg-card);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 8px;
    max-width: 900px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    transform: translateY(20px);
    transition: transform 0.2s ease;
    border: 1px solid var(--border-color);
    box-sizing: border-box;
}

@media (max-width: 768px) {
    .modal-content {
        margin: 0;
        border-radius: 0;
        max-height: 100vh;
        height: 100vh;
        padding: 1rem;
    }
    
    .close-btn {
        top: 0.5rem;
        right: 0.5rem;
        font-size: 1.5rem;
    }
    
    #itemDetailsContent {
        flex-direction: column !important;
    }
    
    #itemDetailsContent > div {
        width: 100% !important;
    }
    
    .cdrom-card {
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }
    
    .full-screen-modal {
        padding: 1rem;
    }
}

.modal-content::before {
    display: none;
}

.modal.show .modal-content {
    transform: translateY(0);
}

.full-screen-modal {
    display: none;
    position: fixed;
    z-index: 102;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-dark);
    padding: 2rem;
    overflow-y: auto;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.full-screen-modal.show {
    opacity: 1;
    transform: translateY(0);
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 1.75rem;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s ease;
    line-height: 1;
}

.close-btn:hover {
    color: #ef4444;
}

.loading-spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

.back-to-top-btn {
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    background: var(--primary-color);
}

.back-to-top-btn.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top-btn:hover {
    background: var(--primary-hover);
}

.dynamic-island {
    position: fixed;
    top: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 99;
    background-color: rgba(36, 36, 36, 0.95);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 0.625rem 1.25rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.hidden-opacity {
    opacity: 0;
    pointer-events: none;
    transform: translateX(-50%) translateY(-20px);
}

#searchInput {
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    padding: 0.75rem 1rem;
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

#searchInput:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

#searchInput::placeholder {
    color: var(--text-muted);
}

.filters-container {
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
}

#yearFilters button {
    border-radius: 4px;
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    background-color: transparent;
    color: var(--text-secondary);
    transition: all 0.15s ease;
}

#yearFilters button:hover {
    background-color: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: #525252;
}

#yearFilters button.bg-blue-600 {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

#yearFilters button.bg-blue-600:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
}

button,
a {
    transition: all 0.15s ease;
}

.btn-primary {
    background: var(--primary-color);
    border: none;
    color: white;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.btn-primary:active {
    transform: translateY(1px);
}

.btn-secondary {
    background: var(--secondary-color);
    border: none;
    color: white;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.btn-secondary:hover {
    background: #047857;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.btn-neutral {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border-radius: 6px;
}

.btn-neutral:hover {
    background-color: var(--bg-card-hover);
    border-color: #525252;
}

#resourceCount {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

#resourceCount::before {
    display: none;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) rotate(45deg); }
    100% { transform: translateX(100%) rotate(45deg); }
}

#loadMoreButton {
    background: var(--primary-color);
    border: none;
    color: white;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

#loadMoreButton:hover {
    background: var(--primary-hover);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

#loadMoreButton:active {
    transform: translateY(1px);
}

#subjectToggle {
    border: 1px solid var(--border-color);
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: #525252;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #626262;
}

.lang-switch-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 0.375rem 0.875rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.lang-switch-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: #525252;
}

.proxy-hint-banner {
    position: fixed;
    top: 0.5rem;
    left: 50%;
    transform: translateX(-50%) translateY(-120%);
    z-index: 103;
    background-color: rgba(37, 99, 235, 0.95);
    color: #fff;
    border-radius: 8px;
    padding: 0.5rem 1.25rem;
    font-size: 0.8125rem;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
    white-space: nowrap;
    pointer-events: none;
}

.proxy-hint-banner.visible {
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 768px) {
    .proxy-hint-banner {
        white-space: normal;
        text-align: center;
        max-width: 90vw;
        font-size: 0.75rem;
        padding: 0.5rem 1rem;
    }
}