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

:root {
    --bg-color: #020617; /* Deep dark background */
    --surface: rgba(15, 23, 42, 0.6); /* Slightly lighter surface with transparency */
    --surface-hover: rgba(30, 41, 59, 0.8);
    --border: rgba(51, 65, 85, 0.5);
    --primary: #10b981;
    --primary-hover: #059669;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-blur: blur(12px);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    background: var(--bg-color);
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(16, 185, 129, 0.08), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(56, 189, 248, 0.08), transparent 25%);
    background-attachment: fixed;
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

#network-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
    opacity: 0.8;
}

/* Fixed Header with Glassmorphism */
header {
    background: var(--surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
    z-index: 10;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.header-title {
    font-size: clamp(1.3rem, 6vw, 2rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 5px;
    background: linear-gradient(to right, #38bdf8, #10b981);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.5px;
}

.header-subtitle {
    text-align: center;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 25px;
    letter-spacing: 0.5px;
}

.search-container {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    width: 20px;
    height: 20px;
    pointer-events: none;
}

#search-input {
    width: 100%;
    padding: 14px 16px 14px 44px;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

#search-input:focus {
    border-color: var(--primary);
    background: rgba(15, 23, 42, 0.8);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2), inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

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

/* List Area */
main {
    flex: 1;
    padding: 20px 15px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(51, 65, 85, 0.5);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(71, 85, 105, 0.8);
}

.list-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
}

.chroma-item {
    background: var(--surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    animation: slideUp 0.4s ease-out forwards;
    opacity: 0;
    transform: translateY(10px);
}

@media (hover: hover) {
    .chroma-item:hover {
        background: var(--surface-hover);
        border-color: rgba(148, 163, 184, 0.2);
        transform: translateY(-2px);
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
    }
}

.chroma-item:active {
    transform: translateY(0);
}

.item-info {
    flex: 1;
    padding-right: 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.item-code {
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.item-title {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
    word-break: break-word;
}

.download-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #ffffff;
    border: none;
    border-radius: 10px;
    padding: 12px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.3);
}

.download-btn svg {
    width: 18px;
    height: 18px;
    transition: transform 0.2s;
}

@media (hover: hover) {
    .download-btn:hover {
        box-shadow: 0 6px 10px -1px rgba(16, 185, 129, 0.4);
        transform: translateY(-1px);
    }

    .download-btn:hover svg {
        transform: translateY(2px);
    }
}

.download-btn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 4px -1px rgba(16, 185, 129, 0.3);
}

/* Pagination Footer */
footer {
    background: var(--surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

.pagination-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 800px;
}

.page-btn {
    background: rgba(15, 23, 42, 0.6);
    color: var(--text-main);
    border: 1px solid var(--border);
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

@media (hover: hover) {
    .page-btn:not(:disabled):hover {
        background: rgba(30, 41, 59, 0.8);
        border-color: rgba(148, 163, 184, 0.3);
    }
}

.page-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.page-info {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
    background: rgba(15, 23, 42, 0.4);
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--border);
}

/* Empty/Loading State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-muted);
    text-align: center;
    animation: fadeIn 0.4s ease-out;
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1.1rem;
    font-weight: 500;
}

/* Animations */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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