/* Variables */
:root {
    --color-background-primary: #ffffff;
    --color-background-secondary: #f9f9f9;
    --color-background-tertiary: #f0f0f0;
    --color-text-primary: #111111;
    --color-text-secondary: #666666;
    --color-text-tertiary: #888888;
    --color-border-tertiary: #eeeeee;
    --color-border-secondary: #cccccc;
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.05);
    --border-radius-lg: 8px;
    --border-radius-md: 6px;
    --color-success: #10b981;
    --color-success-bg: #ecfdf5;
}

[data-theme="dark"] {
    --color-background-primary: #0d1117;
    --color-background-secondary: #161b22;
    --color-background-tertiary: #21262d;
    --color-text-primary: #c9d1d9;
    --color-text-secondary: #8b949e;
    --color-text-tertiary: #6e7681;
    --color-border-tertiary: #30363d;
    --color-border-secondary: #484f58;
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.3);
}

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--color-background-primary);
    color: var(--color-text-primary);
    line-height: 1.5;
    transition: background-color 0.3s ease;
}

/* Layout */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 1.5rem 1rem;
}

.header {
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border-tertiary);
    margin-bottom: 2rem;
}

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

.header h1 {
    font-size: 22px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.header p {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

/* Category */
.category {
    margin-bottom: 2.5rem;
}

.cat-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--color-text-tertiary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.cat-label::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--color-border-tertiary);
}

/* Grid & Cards */
.prompt-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
    gap: 16px;
}

.prompt-card {
    background: var(--color-background-primary);
    border: 1px solid var(--color-border-tertiary);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    transition: all .2s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.prompt-card:hover {
    border-color: var(--color-border-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
}

.card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.card-title {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
}

.preview {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 12px;
    flex-grow: 1;
}

/* Buttons */
.theme-btn,
.copy-btn {
    cursor: pointer;
    border-radius: var(--border-radius-md);
    transition: all 0.2s;
}

.theme-btn {
    background: var(--color-background-secondary);
    border: 1px solid var(--color-border-secondary);
    color: var(--color-text-primary);
    padding: 8px;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 500;
    padding: 6px 12px;
    border: 1px solid var(--color-border-secondary);
    background: var(--color-background-secondary);
    color: var(--color-text-secondary);
}

.theme-btn:hover,
.copy-btn:hover {
    background: var(--color-background-tertiary);
}

.copy-btn.copied {
    border-color: var(--color-success);
    color: var(--color-success);
    background: var(--color-success-bg);
}

/* Tags */
.tag {
    display: inline-block;
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 4px;
    font-weight: 600;
    margin-top: auto;
    align-self: flex-start;
}

.tag-audit {
    background: #E6F1FB;
    color: #0C447C
}

.tag-sync {
    background: #EEEDFE;
    color: #3C3489
}

.tag-refactor {
    background: #E1F5EE;
    color: #085041
}

.tag-feature {
    background: #DBEAFE;
    color: #1D4ED8;
}

.tag-bugfix {
    background: #FCE7F3;
    color: #9D174D;
}

.tag-integration {
    background: #E0F2FE;
    color: #0F766E;
}

.tag-security {
    background: #FEF3C7;
    color: #92400E;
}

.tag-mobile {
    background: #E0E7FF;
    color: #3730A3;
}

.tag-recommendation {
    background: #F3E8FF;
    color: #6B21A8;
}

[data-theme="dark"] .tag-audit {
    background: #162a3d;
    color: #79c0ff;
}

[data-theme="dark"] .tag-sync {
    background: #26214a;
    color: #d2a8ff;
}

[data-theme="dark"] .tag-refactor {
    background: #112b24;
    color: #7ee787;
}

[data-theme="dark"] .tag-feature {
    background: #172554;
    color: #93C5FD;
}

[data-theme="dark"] .tag-bugfix {
    background: #4A044E;
    color: #F9A8D4;
}

[data-theme="dark"] .tag-integration {
    background: #083344;
    color: #67E8F9;
}

[data-theme="dark"] .tag-security {
    background: #451A03;
    color: #FCD34D;
}

[data-theme="dark"] .tag-mobile {
    background: #1E1B4B;
    color: #A5B4FC;
}

[data-theme="dark"] .tag-recommendation {
    background: #3B0764;
    color: #D8B4FE;
}

/* Toast */
.toast {
    display: none;
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: #085041;
    color: #E1F5EE;
    font-size: 13px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--border-radius-md);
    z-index: 999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .toast {
    background: #112b24;
    color: #7ee787;
}

/* Mobile Responsiveness */
@media (max-width: 600px) {
    .container {
        padding: 1rem 0.75rem;
    }

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

    .header p {
        font-size: 13px;
    }

    .card-title {
        font-size: 14px;
    }

    .copy-btn {
        padding: 5px 10px;
        font-size: 11px;
    }
}