:root {
    /* Primary brand colors */
    --primary: #8b5cf6;
    --primary-hover: #7c3aed;
    --primary-light: rgba(139, 92, 246, 0.15);
    
    /* Dark theme (default) */
    --bg-main: #0f172a;
    --bg-surface: #1e293b;
    --bg-surface-hover: #334155;
    --bg-input: #0f172a;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    
    --border: #334155;
    --border-focus: #8b5cf6;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    
    /* Syntax colors */
    --code-bg: #0b1120;
    --code-text: #e2e8f0;
    --code-keyword: #c084fc;
    --code-string: #6ee7b7;
    --code-arg: #93c5fd;

    /* Category colors */
    --cat-git: #f14e32;
    --cat-docker: #2496ed;
    --cat-npm: #cb3837;
    --cat-kubectl: #326ce5;
    --cat-brew: #fbb040;
}

[data-theme="light"] {
    --bg-main: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f5f9;
    --bg-input: #ffffff;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    
    --border: #e2e8f0;
    --border-focus: #8b5cf6;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    
    --code-bg: #f1f5f9;
    --code-text: #0f172a;
    --code-keyword: #a855f7;
    --code-string: #059669;
    --code-arg: #2563eb;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
}

/* Layout */
.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Header */
header {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-title svg {
    color: var(--primary);
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--text-primary), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Controls */
.controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Search */
.search-box {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

.search-icon {
    position: absolute;
    left: 1rem;
    color: var(--text-tertiary);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 0.875rem 3rem 0.875rem 2.75rem;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.search-box input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--primary-light);
}

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

.shortcut-hint {
    position: absolute;
    right: 1rem;
    background-color: var(--bg-main);
    border: 1px solid var(--border);
    color: var(--text-tertiary);
    border-radius: 0.375rem;
    padding: 0.125rem 0.5rem;
    font-size: 0.75rem;
    font-family: 'Fira Code', monospace;
    font-weight: 500;
    pointer-events: none;
}

/* Filters */
.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-btn {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.filter-btn:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

.filter-btn.active {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

.filter-btn::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    opacity: 0.8;
}

.filter-btn[data-category="all"]::before { display: none; }
.filter-btn[data-category="git"]::before { background-color: var(--cat-git); }
.filter-btn[data-category="docker"]::before { background-color: var(--cat-docker); }
.filter-btn[data-category="npm"]::before { background-color: var(--cat-npm); }
.filter-btn[data-category="kubectl"]::before { background-color: var(--cat-kubectl); }
.filter-btn[data-category="brew"]::before { background-color: var(--cat-brew); }

.filter-btn:not(.active)[data-category="all"] {
    background-color: var(--bg-surface);
}

/* Results Meta */
.results-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Buttons */
.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    background-color: var(--bg-surface);
    color: var(--primary);
}

.action-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.375rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.375rem;
    transition: all 0.2s ease;
}

.action-btn:hover {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.text-btn {
    background: transparent;
    border: none;
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
    text-decoration-color: transparent;
    transition: text-decoration-color 0.2s;
}

.text-btn:hover {
    text-decoration-color: var(--primary);
}

/* Commands Grid */
.commands-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 768px) {
    .commands-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Command Card */
.command-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.command-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-focus);
}

.command-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.command-card[data-category="git"]::before { background-color: var(--cat-git); }
.command-card[data-category="docker"]::before { background-color: var(--cat-docker); }
.command-card[data-category="npm"]::before { background-color: var(--cat-npm); }
.command-card[data-category="kubectl"]::before { background-color: var(--cat-kubectl); }
.command-card[data-category="brew"]::before { background-color: var(--cat-brew); }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    background-color: var(--bg-main);
    color: var(--text-secondary);
}

.card-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    flex-grow: 1;
}

.code-container {
    position: relative;
    background-color: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.875rem 2.5rem 0.875rem 1rem;
    font-family: 'Fira Code', monospace;
    font-size: 0.875rem;
    color: var(--code-text);
    overflow-x: auto;
    white-space: nowrap;
}

/* Syntax highlighting logic handled via JS span wrapping */
.code-cmd { color: var(--code-keyword); font-weight: 500; }
.code-sub { color: var(--text-primary); }
.code-flag { color: var(--code-arg); }
.code-val { color: var(--code-string); }

.copy-btn {
    position: absolute;
    top: 50%;
    right: 0.5rem;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 0.375rem;
    border-radius: 0.375rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    opacity: 0;
}

.code-container:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    background-color: var(--bg-surface-hover);
    color: var(--primary);
}

/* No Results */
.no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
    gap: 1rem;
    color: var(--text-tertiary);
}

.no-results p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* Footer */
footer {
    text-align: center;
    padding-top: 2rem;
    margin-top: auto;
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

kbd {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 0.25rem;
    padding: 0.125rem 0.375rem;
    font-family: 'Fira Code', monospace;
    box-shadow: 0 1px 0 var(--border);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100%);
    background-color: var(--text-primary);
    color: var(--bg-main);
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 50;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.command-card {
    animation: fadeIn 0.3s ease forwards;
}