:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --text-main: #c9d1d9;
    --text-muted: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #3182ce;
    --border: #30363d;
    --success: #2ea043;
    --danger: #da3633;
    --glass-bg: rgba(22, 27, 34, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

h1,
h2,
h3,
h4 {
    color: #ffffff;
    font-weight: 600;
    margin-bottom: 1rem;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Glassmorphism Card */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
    min-height: 100vh;
    background: radial-gradient(circle at top left, #1f2937, #0d1117);
}

.auth-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 3rem;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.5s ease-out forwards;
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.75rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: #0d1117;
    border: 1px solid var(--border);
    color: #fff;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.2);
}

.btn {
    display: inline-block;
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--accent);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.2s, transform 0.1s;
}

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

.btn:active {
    transform: scale(0.98);
}

.text-center {
    text-align: center;
}

.mt-3 {
    margin-top: 1rem;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.alert-danger {
    background-color: rgba(218, 54, 51, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Dashboard Sidebar Layout */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border);
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
}

.brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 2.5rem;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand span {
    color: var(--accent);
}

.nav-item {
    padding: 0.75rem 1rem;
    display: block;
    color: var(--text-muted);
    border-radius: 8px;
    margin-bottom: 0.5rem;
    transition: all 0.2s;
    font-weight: 500;
}

.nav-item:hover,
.nav-item.active {
    background-color: var(--border);
    color: #fff;
}

.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* Dashboard Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.card-meta {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

/* Canvas Area */
#canvas-container {
    width: 100%;
    height: 500px;
    background-color: #000;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    margin-top: 2rem;
}

/* Mobile Responsiveness & Drawer */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
    margin-right: 1rem;
}

@media (max-width: 768px) {
    .app-layout {
        flex-direction: column;
    }

    .menu-toggle {
        display: inline-block;
    }

    header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 1rem;
    }

    .sidebar {
        position: fixed;
        left: -260px;
        top: 0;
        bottom: 0;
        z-index: 1000;
        transition: left 0.3s ease;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.5);
    }

    .sidebar.open {
        left: 0;
    }

    .overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        display: none;
    }

    .overlay.open {
        display: block;
    }

    .setup-grid {
        grid-template-columns: 1fr !important;
    }

    .tabs {
        flex-wrap: wrap;
    }

    .tab {
        flex: 1;
        text-align: center;
        padding: 0.5rem;
    }
}