:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: rgba(255, 255, 255, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Pretendard', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

/* Category Tabs */
.category-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    flex-wrap: wrap;
    /* Wrap tags */
}

.category-tabs::-webkit-scrollbar {
    display: none;
}

.cat-tab {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 20px;
    white-space: nowrap;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.95rem;
    user-select: none;
}

.cat-tab:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.cat-tab.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.count-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.8rem;
    margin-left: 5px;
    color: var(--text-primary);
    font-weight: bold;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.search-input {
    flex: 1;
    max-width: 400px;
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--border);
    color: white;
    padding: 15px 25px;
    border-radius: 30px;
    outline: none;
    font-size: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.tool-select {
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--border);
    color: white;
    padding: 0 20px;
    border-radius: 30px;
    outline: none;
    cursor: pointer;
    font-size: 0.95rem;
}

.search-input:focus {
    border-color: var(--accent);
    background: var(--card-bg);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

/* Grid */
.masonry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 15px;
}

.prompt-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 15px;
    transition: transform 0.2s, border-color 0.2s;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.prompt-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
}

.card-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.card-title {
    font-size: 0.95rem;
    font-weight: bold;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
}

.card-preview {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #cbd5e1;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}

.card-tags {
    margin-top: auto;
    margin-bottom: 15px;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.tag-badge {
    font-size: 0.75rem;
    color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
    padding: 3px 8px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.tag-badge:hover {
    background: var(--accent);
    color: white;
}

.card-footer {
    display: flex;
    justify-content: flex-end;
    /* Align Copy button to right */
    align-items: center;
    border-top: 1px solid var(--border);
    padding-top: 15px;
}

.copy-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s;
}

.copy-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: #1e293b;
    width: 90%;
    max-width: 600px;
    padding: 30px;
    border-radius: 16px;
    position: relative;
    border: 1px solid var(--border);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-body textarea {
    width: 100%;
    height: 200px;
    background: #0f172a;
    border: 1px solid var(--border);
    color: white;
    padding: 15px;
    border-radius: 8px;
    resize: vertical;
    margin: 10px 0;
    font-family: monospace;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: #10b981;
    color: white;
    padding: 10px 20px;
    border-radius: 30px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 2000;
}

.toast.show {
    opacity: 1;
}