/* assets/css/style.css */
:root {
    --primary: #0d6efd;
    --primary-dark: #0b5ed7;
    --secondary: #6c757d;
    --success: #198754;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #0dcaf0;
    --dark: #212529;
    --light: #f8f9fa;
    --border-radius: 0.75rem;
    --border-radius-sm: 0.5rem;
    --box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.08);
    --transition: all 0.2s ease-in-out;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, 'Roboto', sans-serif;
    background: #f0f2f5;
    color: #1e2a3e;
    line-height: 1.5;
}

/* Navbar hiện đại */
.navbar-modern {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 0.8rem 1rem;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
}

.navbar-brand img {
    height: 40px;
    margin-right: 10px;
}

/* Card chung */
.card-modern {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    background: white;
}

.card-modern:hover {
    transform: translateY(-3px);
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.12);
}

.card-header-modern {
    background: white;
    border-bottom: 2px solid var(--primary);
    font-weight: 600;
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
}

/* Button */
.btn-modern {
    border-radius: 2rem;
    padding: 0.6rem 1.2rem;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-modern-primary {
    background: var(--primary);
    color: white;
}
.btn-modern-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(13,110,253,0.3);
}

.btn-modern-danger {
    background: var(--danger);
    color: white;
}
.btn-modern-danger:hover {
    background: #bb2d3b;
    transform: translateY(-1px);
}

/* Form controls */
.form-control-modern,
.form-select-modern {
    border-radius: var(--border-radius-sm);
    border: 1px solid #ced4da;
    padding: 0.65rem 0.9rem;
    transition: var(--transition);
    width: 100%;
    font-size: 0.95rem;
}

.form-control-modern:focus,
.form-select-modern:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    outline: none;
}

/* Table */
.table-modern {
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
}

.table-modern th {
    background: var(--light);
    font-weight: 600;
    padding: 12px 8px;
    border-bottom: 2px solid #dee2e6;
}

.table-modern td {
    padding: 12px 8px;
    vertical-align: middle;
    border-bottom: 1px solid #e9ecef;
}

/* Login page - vertical layout */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1.5rem;
}

.login-card-vertical {
    max-width: 450px;
    width: 100%;
    background: white;
    border-radius: 1.5rem;
    box-shadow: 0 25px 45px rgba(0,0,0,0.2);
    overflow: hidden;
    padding: 2rem 1.8rem;
    text-align: center;
}

.logo-area {
    margin-bottom: 1.5rem;
}

.logo-area img {
    max-width: 100px;
    margin-bottom: 1rem;
}

.logo-area h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--primary-dark);
}

.logo-area p {
    color: var(--secondary);
    font-size: 0.9rem;
}

/* Bỏ phần chia cột, chỉ một cột duy nhất */
.login-form .form-group {
    margin-bottom: 1.2rem;
    text-align: left;
}

.login-form label {
    font-weight: 600;
    margin-bottom: 0.4rem;
    display: block;
}

.login-form .btn-login {
    margin-top: 0.5rem;
    width: 100%;
    padding: 0.7rem;
    font-size: 1rem;
}

.footer-note {
    margin-top: 1.8rem;
    font-size: 0.8rem;
    color: #6c757d;
    border-top: 1px solid #e9ecef;
    padding-top: 1.2rem;
}

/* Responsive */
@media (max-width: 576px) {
    .login-card-vertical {
        padding: 1.5rem;
    }
    .logo-area h3 {
        font-size: 1.3rem;
    }
    .btn-modern {
        padding: 0.5rem 1rem;
    }
}