/* 1. Global Variables & Modern Reset */
:root {
    --primary-color: #0d6efd;    
    --primary-hover: #0a58ca;
    --success-color: #22c55e;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --bg-color: #f9fafb;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.5;
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 2. Navbar Styling */
.navbar {
    background-color: var(--bs-body-bg) !important;
}

.navbar-brand small {
    color: var(--bs-secondary-color) !important;
}

.border-bottom {
    border-color: var(--bs-border-color) !important;
}

.nav-link {
    font-weight: 500;
    color: var(--bs-nav-link-color) !important; 
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* 3. Assignment Cards */
.assignment-card {
    background-color: var(--bs-body-bg); 
    border: 1px solid var(--bs-border-color);
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 1rem;
    transition: all 0.2s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.assignment-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.assignment-info h5 {
    margin-bottom: 0.25rem;
    font-weight: 600;
    color: var(--bs-heading-color); 
}

.assignment-meta {
    font-size: 0.875rem;
    color: var(--bs-secondary-color);
}

/* 4. Status Badges */
.status-badge {
    padding: 0.35rem 0.85rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

/* Light Mode Badge Colors */
.status-done { background-color: #dcfce7; color: #166534; }
.status-urgent { background-color: #fee2e2; color: #991b1b; }
.status-soon { background-color: #fef3c7; color: #92400e; }
.status-pending { background-color: #f3f4f6; color: #374151; }

/* 5. Buttons & Forms */
.btn-primary {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    font-weight: 600;
    border-radius: 8px;
}

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

.form-control {
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    border-radius: 8px;
    border: 1px solid var(--bs-border-color);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
}

/* 6. Form Input Controls (Timer Fix) */
input[type="time"], 
input[type="number"] {
    padding-right: 10px !important;
    min-width: 140px;
    position: relative;
}

/* Hides the arrows that overlap numbers */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type=number] {
    -moz-appearance: textfield; /* Firefox support */
}

/* 7. Dark Mode Specific Overrides */
[data-bs-theme="dark"] .assignment-card {
    background-color: var(--bs-body-tertiary);
}

[data-bs-theme="dark"] .status-done { background-color: rgba(74, 222, 128, 0.2); color: #4ade80; }
[data-bs-theme="dark"] .status-urgent { background-color: rgba(248, 113, 113, 0.2); color: #f87171; }
[data-bs-theme="dark"] .status-soon { background-color: rgba(251, 191, 36, 0.2); color: #fbbf24; }
[data-bs-theme="dark"] .status-pending { background-color: rgba(209, 213, 219, 0.2); color: #d1d5db; }

/* 8. Landing Page Elements */
.landing-hero {
    background: linear-gradient(145deg, #1a1a1a 0%, #2c3e50 100%);
}

.feature-box {
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--bs-border-color);
    background-color: var(--bs-body-tertiary);
    height: 100%;
    transition: transform 0.2s ease;
}

.feature-box:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}