:root, [data-theme="dark"] {
    --bg-color: #09090b;
    --bg-card: #121215;
    --bg-card-hover: #1f1f23;
    --text-main: #f4f4f5;
    --text-muted: #9ca3af;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --border: #27272a;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    --font-family: 'Inter', sans-serif;
    --radius: 12px;
    --nav-bg: rgba(14, 14, 17, 0.85);
    --input-bg: #09090b;
    --tr-hover: rgba(255, 255, 255, 0.04);
    --card-shadow: 0 4px 12px -2px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
    --bg-color: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --border: #e2e8f0;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    --font-family: 'Inter', sans-serif;
    --radius: 12px;
    --nav-bg: rgba(255, 255, 255, 0.85);
    --input-bg: #ffffff;
    --tr-hover: rgba(0, 0, 0, 0.02);
    --card-shadow: 0 4px 15px -1px rgba(0, 0, 0, 0.06);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-family);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.25s ease, color 0.25s ease;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Navbar */
.navbar {
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color 0.25s ease, border-color 0.25s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.5px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-family: var(--font-family);
    font-size: 0.95rem;
    text-decoration: none;
}

.btn-primary, a.btn-primary { background: var(--primary); color: #ffffff !important; }
.btn-primary:hover, a.btn-primary:hover { background: var(--primary-hover); color: #ffffff !important; transform: translateY(-1px); }
.btn-outline, a.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-main) !important; }
.btn-outline:hover, a.btn-outline:hover { background: var(--bg-card-hover); color: var(--text-main) !important; }
.btn-success, a.btn-success { background: var(--success); color: #ffffff !important; }
.btn-success:hover, a.btn-success:hover { background: #059669; color: #ffffff !important; }
.btn-sm { padding: 0.35rem 0.8rem; font-size: 0.85rem; }

/* User badge in nav */
.user-badge {
    padding: 0.4rem 0.8rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-right: 0.5rem;
}

/* Forms */
.form-group { margin-bottom: 1.5rem; }
.form-label { display: block; margin-bottom: 0.5rem; font-weight: 500; color: var(--text-muted); }
.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-main);
    font-family: var(--font-family);
    transition: border-color 0.2s, background-color 0.25s, color 0.25s;
}
.form-control:focus { outline: none; border-color: var(--primary); }

/* Cards & Layout */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--border);
    box-shadow: var(--card-shadow);
    transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.grid { display: grid; gap: 1.5rem; }
.grid-cols-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

/* Tables */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; text-align: left; }
th, td { padding: 1rem; border-bottom: 1px solid var(--border); }
th { font-weight: 600; color: var(--text-muted); text-transform: uppercase; font-size: 0.8rem; letter-spacing: 0.05em; }
tr:hover td { background: var(--tr-hover); }

/* Utilities */
.text-center { text-align: center; }
.mb-4 { margin-bottom: 1rem; }
.mt-4 { margin-top: 1rem; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }

/* Tabs */
.tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 1.5rem; }
.tab { padding: 1rem 1.5rem; cursor: pointer; color: var(--text-muted); font-weight: 500; border-bottom: 2px solid transparent; transition: all 0.2s; }
.tab:hover { color: var(--text-main); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }

/* Spinner */
.loading-state { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 4rem 0; color: var(--text-muted); }
.spinner { width: 40px; height: 40px; border: 3px solid rgba(255,255,255,0.1); border-radius: 50%; border-top-color: var(--primary); animation: spin 1s ease-in-out infinite; margin-bottom: 1rem; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Badges */
.badge { padding: 0.25rem 0.6rem; border-radius: 999px; font-size: 0.75rem; font-weight: 600; white-space: nowrap; display: inline-block; }
.badge-active { background: rgba(16, 185, 129, 0.2); color: var(--success); }
.badge-draft { background: rgba(245, 158, 11, 0.2); color: var(--warning); }
.badge-completed { background: rgba(59, 130, 246, 0.2); color: var(--primary); }