/**
 * ProjectHub - Main Stylesheet
 * Corporate High-Tech IT Theme
 */

/* ========================================
   ROOT VARIABLES
======================================== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #64748b;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    --dark: #0f172a;
    --light: #f8fafc;
    --white: #ffffff;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    --sidebar-width: 260px;
    --header-height: 64px;
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* ========================================
   GLOBAL STYLES
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
}

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

a:hover {
    color: var(--primary-dark);
}

/* ========================================
   UTILITIES
======================================== */
.text-primary { color: var(--primary) !important; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--danger) !important; }
.text-info { color: var(--info) !important; }

.bg-primary-soft { background-color: rgba(37, 99, 235, 0.1) !important; }
.bg-success-soft { background-color: rgba(34, 197, 94, 0.1) !important; }
.bg-warning-soft { background-color: rgba(245, 158, 11, 0.1) !important; }
.bg-danger-soft { background-color: rgba(239, 68, 68, 0.1) !important; }

/* ========================================
   CARDS
======================================== */
.card {
    background: var(--white);
    border: none;
    border-radius: var(--border-radius);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--gray-200);
    padding: 20px 24px;
    font-weight: 600;
}

.card-body {
    padding: 24px;
}

/* ========================================
   BUTTONS
======================================== */
.btn {
    font-weight: 500;
    border-radius: 8px;
    padding: 10px 20px;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transform: translateY(-1px);
}

.btn-outline-primary {
    border: 2px solid var(--primary);
    color: var(--primary);
}

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

/* ========================================
   BADGES
======================================== */
.badge {
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 6px;
}

.badge-status {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ========================================
   TABLES
======================================== */
.table {
    margin-bottom: 0;
}

.table th {
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--gray-200);
    padding: 16px;
}

.table td {
    padding: 16px;
    vertical-align: middle;
    border-bottom: 1px solid var(--gray-100);
}

.table tbody tr:hover {
    background-color: var(--gray-50);
}

/* ========================================
   FORMS
======================================== */
.form-control, .form-select {
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    padding: 12px 16px;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-label {
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 8px;
}

/* ========================================
   PRIORITY COLORS
======================================== */
.priority-low { color: var(--success); }
.priority-medium { color: var(--info); }
.priority-high { color: var(--warning); }
.priority-urgent { color: var(--danger); }

.priority-badge-low { background-color: rgba(34, 197, 94, 0.1); color: var(--success); }
.priority-badge-medium { background-color: rgba(6, 182, 212, 0.1); color: var(--info); }
.priority-badge-high { background-color: rgba(245, 158, 11, 0.1); color: var(--warning); }
.priority-badge-urgent { background-color: rgba(239, 68, 68, 0.1); color: var(--danger); }

/* ========================================
   ANIMATIONS
======================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease forwards;
}

/* ========================================
   RESPONSIVE
======================================== */
@media (max-width: 768px) {
    .card-body {
        padding: 16px;
    }
    
    .btn {
        padding: 8px 16px;
    }
}