/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --background: #0e1217;
    --surface: #1c1f26;
    --card-bg: #1c1f26;
    --card-hover: #24272f;
    --text-primary: #e7eaf0;
    --text-secondary: #a8b3cf;
    --text-tertiary: #6b7280;
    --border: #2d3138;
    --accent: #10b981;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 16px rgba(0, 0, 0, 0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background: var(--background);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 16px;
}

/* Header */
.header {
    padding: 32px 0 24px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

/* Filter Bar */
.filter-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.search-input {
    flex: 1;
    padding: 10px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: all 0.2s;
}

.search-input::placeholder {
    color: var(--text-tertiary);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--card-hover);
}

.btn-clear {
    padding: 10px 20px;
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 12px;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-clear:hover {
    background: var(--card-hover);
    border-color: var(--primary);
}

/* Tag Cloud */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.tag-cloud:empty {
    display: none;
}

.tag-chip {
    padding: 6px 12px;
    background: var(--surface);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.tag-chip:hover {
    background: var(--card-hover);
    color: var(--text-primary);
    border-color: var(--primary);
}

.tag-chip .tag-count {
    color: var(--text-tertiary);
    margin-left: 4px;
    font-size: 0.8rem;
}

/* Stats */
.stats {
    margin-bottom: 16px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* Loading */
.loading {
    text-align: center;
    padding: 80px 20px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Error State */
.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
    padding: 16px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 24px;
}

.btn-retry {
    margin-top: 12px;
    padding: 8px 16px;
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.btn-retry:hover {
    background: rgba(239, 68, 68, 0.3);
}

/* Links Grid */
.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 16px;
    margin-bottom: 40px;
}

.link-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 16px;
    transition: all 0.2s;
    cursor: pointer;
}

.link-card:hover {
    background: var(--card-hover);
    border-color: var(--primary);
    box-shadow: var(--shadow-hover);
}

.link-url {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 8px;
    text-decoration: none;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.link-url:hover {
    color: var(--primary);
}

.link-note {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.link-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.link-tag {
    padding: 4px 8px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
}

.link-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-tertiary);
    font-size: 0.8rem;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.link-date {
    font-weight: 500;
}

.link-source {
    text-transform: capitalize;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h2 {
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 1.25rem;
    font-weight: 600;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Install Prompt */
.install-prompt {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 16px 20px;
    border-radius: 12px;
    box-shadow: var(--shadow-hover);
    z-index: 1000;
    max-width: 90%;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateX(-50%) translateY(100px);
        opacity: 0;
    }
    to {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

.install-content {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.install-buttons {
    display: flex;
    gap: 10px;
}

.btn-install {
    padding: 8px 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-install:hover {
    background: var(--primary-hover);
}

.btn-dismiss {
    padding: 8px 16px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.btn-dismiss:hover {
    background: var(--card-hover);
    color: var(--text-primary);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 12px;
    }

    .header {
        padding: 24px 0 20px;
    }

    .header h1 {
        font-size: 1.25rem;
    }

    .links-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .filter-bar {
        flex-direction: column;
        gap: 8px;
    }

    .install-content {
        flex-direction: column;
        text-align: center;
        font-size: 0.85rem;
    }

    .tag-cloud {
        margin-bottom: 16px;
    }
}

@media (min-width: 1024px) {
    .links-grid {
        grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    }
}