:root {
    --bg-dark: #0f172a;
    --sidebar-bg: #1e293b;
    --primary: #38bdf8;
    --primary-hover: #0ea5e9;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --card-bg: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow-x: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-item {
    background: transparent;
    border: none;
    color: var(--text-muted);
    text-align: left;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-item:hover, .nav-item.active {
    background-color: rgba(56, 189, 248, 0.1);
    color: var(--primary);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 32px 40px;
    overflow-y: auto;
}

.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 20px;
}

.top-header h1 {
    font-size: 1.8rem;
    margin-bottom: 4px;
}

.top-header p {
    color: var(--text-muted);
}

.search-bar {
    position: relative;
    width: 300px;
}

.search-bar i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-bar input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    background-color: var(--sidebar-bg);
    color: var(--text-main);
    outline: none;
    transition: border-color 0.2s;
}

.search-bar input:focus {
    border-color: var(--primary);
}

/* Prompt Grid */
.prompt-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    backdrop-filter: blur(10px);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    border-color: var(--primary);
}

.card-icon {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Modal / Glass Effect */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 1000;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 600px;
    border-radius: 20px;
    padding: 24px;
    transform: translateY(20px);
    transition: transform 0.3s ease;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.close-btn:hover {
    color: #ef4444;
}

textarea {
    width: 100%;
    height: 250px;
    background: #0b1120;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    color: #a7f3d0;
    font-family: monospace;
    font-size: 0.95rem;
    resize: none;
    outline: none;
    margin-bottom: 20px;
}

.modal-footer {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.copy-status {
    color: #34d399;
    font-size: 0.9rem;
    opacity: 0;
    transition: opacity 0.3s;
}

.copy-status.show {
    opacity: 1;
}

/* Responsiveness */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        padding: 16px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .logo {
        margin-bottom: 16px;
    }
    .nav-menu {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 8px;
    }
    .nav-item {
        white-space: nowrap;
    }
    .main-content {
        padding: 20px;
    }
    .search-bar {
        width: 100%;
    }
}