:root {
    /* Soft Dark Theme Palette */
    --bg-body: #111827;      /* Very Dark Gray */
    --bg-card: #1f2937;      /* Soft Gray for Cards/Boxes */
    --bg-sidebar: #111827;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --primary: #8b5cf6;      /* Soft Violet */
    --primary-hover: #7c3aed;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    
    --border-color: #374151;
    --shadow-soft: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-lg: 16px;
    --radius-md: 12px;
}

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

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: 'Inter', system-ui, sans-serif;
    line-height: 1.6;
    font-size: 15px;
}

a { text-decoration: none; color: inherit; transition: 0.2s ease; }
ul { list-style: none; }

/* LAYOUT GRIDS */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 25px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; }

/* Dashboard Layout */
.dashboard-layout { display: flex; min-height: 100vh; }
.sidebar {
    width: 280px; background-color: var(--bg-sidebar); border-right: 1px solid var(--border-color);
    padding: 30px 20px; display: flex; flex-direction: column; position: fixed; height: 100vh; z-index: 100; left:0; top:0;
}
.sidebar-brand {
    font-size: 1.8rem; font-weight: 800; color: var(--text-primary); margin-bottom: 40px; padding-left: 10px; letter-spacing: -1px;
}
.sidebar-brand span { color: var(--primary); }
.nav-menu { display: flex; flex-direction: column; gap: 10px; }
.nav-item {
    display: flex; align-items: center; gap: 14px; padding: 14px 18px; border-radius: var(--radius-md);
    color: var(--text-secondary); font-weight: 500; transition: all 0.2s ease;
}
.nav-item:hover { background-color: rgba(139, 92, 246, 0.1); color: var(--primary); transform: translateX(4px); }
.nav-item.active { background-color: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3); }
.nav-item.logout { margin-top: auto; color: var(--danger); border: 1px solid rgba(239, 68, 68, 0.2); }
.nav-item.logout:hover { background-color: rgba(239, 68, 68, 0.1); transform: none; }
.main-content { flex: 1; margin-left: 280px; padding: 40px; background-color: #111827; }

/* CONTENT BOXES & CARDS (Unified) */
.content-box, .card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 30px;
    box-shadow: var(--shadow-soft);
    margin-bottom: 30px;
}
.content-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 25px; }
.page-title { font-size: 1.8rem; font-weight: 700; color: #fff; margin-bottom: 10px; }
.page-subtitle { color: var(--text-secondary); margin-bottom: 30px; }

/* UTILITIES & ELEMENTS */
.text-center { text-align: center; }
.w-full { width: 100%; }
.mb-4 { margin-bottom: 2rem; }
.flex { display: flex; }
.glass { background: rgba(31, 41, 55, 0.8); backdrop-filter: blur(10px); } /* Glass effect fix */

/* FORM ELEMENTS */
.form-group { margin-bottom: 20px; }
label { display: block; margin-bottom: 8px; color: var(--text-secondary); font-weight: 500; font-size: 0.9rem; }
input, select, textarea {
    width: 100%; padding: 12px 16px; background-color: #111827;
    border: 1px solid var(--border-color); border-radius: var(--radius-md);
    color: #fff; font-size: 0.95rem; transition: 0.2s border-color;
}
input:focus, select:focus { outline: none; border-color: var(--primary); }

/* BUTTONS */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 12px 24px; border-radius: var(--radius-md); font-weight: 600; font-size: 0.95rem;
    cursor: pointer; border: none; transition: 0.2s transform;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background-color: var(--primary); color: white; box-shadow: 0 4px 12px rgba(139, 92, 246, 0.25); }
.btn-primary:hover { background-color: var(--primary-hover); }
.btn-secondary, .btn-outline { background-color: transparent; border: 1px solid var(--border-color); color: var(--text-secondary); }
.btn-secondary:hover, .btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }

/* TABLE */
table { width: 100%; border-collapse: separate; border-spacing: 0; }
th { text-align: left; padding: 15px; color: var(--text-secondary); border-bottom: 1px solid var(--border-color); font-weight: 600; }
td { padding: 15px; border-bottom: 1px solid #374151; color: var(--text-primary); }
tr:last-child td { border-bottom: none; }

/* BADGES */
.badge { display: inline-block; padding: 6px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; }
.badge.active, .badge-active { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge.expired, .badge-expired { background: rgba(239, 68, 68, 0.15); color: var(--danger); }

/* LANDING PAGE SPECIFIC */
header h1 { font-size: 3.5rem; line-height: 1.1; margin-bottom: 1rem; color: #fff; }
header p { color: var(--text-secondary); max-width: 600px; margin: 0 auto 30px; font-size: 1.2rem; }

@media (max-width: 900px) {
    .sidebar { width: 80px; padding: 20px 10px; }
    .sidebar-brand span, .nav-item span:not(:first-child) { display: none; }
    .nav-item { justify-content: center; padding: 15px; }
    .main-content { margin-left: 80px; padding: 20px; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    header h1 { font-size: 2.5rem; }
}