/* 1. IMPORT FONT CHỮ HIỆN ĐẠI */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary: #0d6efd; /* Xanh công nghệ */
    --dark: #0f172a; /* Đen huyền bí */
    --secondary: #64748b; /* Xám tinh tế */
    --light-bg: #f8fafc; /* Nền sáng dịu mắt */
    --white: #ffffff;
    --glass: rgba(255, 255, 255, 0.8);
    --shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.1);
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* 2. CẤU HÌNH CHUNG */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--light-bg);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 3. THANH MENU (NAVBAR) CAO CẤP */
.navbar {
    background: rgba(15, 23, 42, 0.95) !important;
    backdrop-filter: blur(10px);
    padding: 18px 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    transition: var(--transition);
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
    color: var(--white) !important;
}

.nav-link {
    color: rgba(255,255,255,0.7) !important;
    font-weight: 500;
    font-size: 0.95rem;
    margin: 0 12px;
    position: relative;
    transition: var(--transition);
}

    .nav-link::after {
        content: '';
        position: absolute;
        bottom: -5px;
        left: 50%;
        width: 0;
        height: 2px;
        background: var(--primary);
        transition: var(--transition);
        transform: translateX(-50%);
    }

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

        .nav-link:hover::after {
            width: 20px;
        }

/* 4. THẺ CARD (DÙNG CHO TIN TỨC & XE) */
.card {
    border: none;
    border-radius: 24px;
    background: var(--white);
    box-shadow: var(--shadow);
    transition: var(--transition);
    overflow: hidden;
}

    .card:hover {
        transform: translateY(-12px) scale(1.02);
        box-shadow: 0 30px 60px -12px rgba(0,0,0,0.15);
    }

.card-img-top {
    transition: var(--transition);
}

.card:hover .card-img-top {
    transform: scale(1.1);
}

/* 5. BẢNG DỮ LIỆU (QUẢN LÝ XE) */
.table-responsive {
    border-radius: 24px;
    background: white;
    padding: 10px;
    box-shadow: var(--shadow);
}

.table thead th {
    background-color: var(--dark);
    color: white;
    border: none;
    padding: 20px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 1px;
}

.table tbody td {
    padding: 20px;
    vertical-align: middle;
    border-bottom: 1px solid #f1f5f9;
}

/* 6. NÚT BẤM (BUTTONS) */
.btn {
    border-radius: 12px;
    padding: 12px 28px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, #0d6efd 0%, #004dc0 100%);
    border: none;
    box-shadow: 0 8px 20px rgba(13, 110, 253, 0.25);
}

    .btn-primary:hover {
        transform: translateY(-3px);
        box-shadow: 0 12px 25px rgba(13, 110, 253, 0.4);
    }

/* 7. HIỆU ỨNG KÍNH MỜ (MODAL & LỚP PHỦ) */
.modal-content {
    border-radius: 32px;
    border: none;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
}

/* 8. TRANG LIÊN HỆ & FORM */
.form-control {
    border-radius: 14px;
    padding: 15px;
    background-color: #f1f5f9;
    border: 2px solid transparent;
    transition: var(--transition);
}

    .form-control:focus {
        background-color: #fff;
        border-color: var(--primary);
        box-shadow: 0 0 0 4px rgba(13, 110, 253, 0.1);
    }

/* 9. HIỆU ỨNG CHỮ & TIÊU ĐỀ */
h1, h2, h3, h4 {
    font-weight: 800;
    letter-spacing: -1px;
}

.text-primary {
    color: var(--primary) !important;
}

/* 10. FOOTER SANG TRỌNG */
footer {
    background: var(--dark);
    color: rgba(255,255,255,0.5);
    padding: 60px 0;
    border-radius: 60px 60px 0 0;
    margin-top: 100px;
}

    footer strong {
        color: var(--white);
    }

/* 11. CÁC LỚP TIỆN ÍCH (HELPER CLASSES) */
.ls-1 {
    letter-spacing: 1px;
}

.rounded-5 {
    border-radius: 30px !important;
}

.hover-scale {
    transition: var(--transition);
}

    .hover-scale:hover {
        transform: scale(1.05);
    }