/* ==================== Global Styles ==================== */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #ec4899;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --dark: #1f2937;
    --gray: #6b7280;
    --gray-light: #f3f4f6;
    --border: #e5e7eb;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f9fafb;
    color: var(--dark);
    line-height: 1.6;
}

/* ==================== Container & Layout ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.grid {
    display: grid;
    gap: 24px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.flex {
    display: flex;
    gap: 16px;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ==================== Navigation ==================== */
.navbar {
    background: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    color: var(--gray);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.nav-menu a:hover {
    color: var(--primary);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 15px;
    padding-left: 20px;
    border-left: 1px solid var(--border);
}

.user-menu span {
    font-weight: 500;
    color: var(--dark);
}

/* ==================== Buttons ==================== */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

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

.btn-secondary {
    background-color: var(--secondary);
    color: white;
}

.btn-secondary:hover {
    background-color: #db2777;
}

.btn-success {
    background-color: var(--success);
    color: white;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-danger {
    background-color: var(--danger);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

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

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

.btn-logout {
    padding: 8px 16px;
    background-color: var(--danger);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.btn-logout:hover {
    background-color: #dc2626;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ==================== Forms ==================== */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark);
}

input,
textarea,
select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

.form-error {
    color: var(--danger);
    font-size: 12px;
    margin-top: 4px;
}

.form-card {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    margin: 60px auto;
}

/* ==================== Cards ==================== */
.card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.card:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.card-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
    font-weight: 600;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-body {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--dark);
}

.card-subtitle {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 8px;
}

.card-description {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 16px;
    flex-grow: 1;
}

.card-meta {
    font-size: 12px;
    color: var(--gray);
    margin-bottom: 12px;
}

.card-footer {
    display: flex;
    gap: 10px;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.card-price {
    font-size: 20px;
    font-weight: bold;
    color: var(--primary);
}

/* ==================== Tables ==================== */
table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

thead {
    background: var(--gray-light);
    font-weight: 600;
    color: var(--dark);
}

th,
td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

tbody tr:hover {
    background: var(--gray-light);
}

tbody tr:last-child td {
    border-bottom: none;
}

/* ==================== Hero Section ==================== */
.hero {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 80px 20px;
    text-align: center;
    border-radius: 12px;
    margin: 40px auto;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero .btn {
    background: white;
    color: var(--primary);
    margin: 0 10px;
}

.hero .btn:hover {
    background: var(--gray-light);
}

/* ==================== Loading & Spinner ==================== */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==================== Alerts & Toast ==================== */
.alert {
    padding: 16px 20px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background-color: #fee2e2;
    color: #7f1d1d;
    border: 1px solid #fecaca;
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 1px solid #fcd34d;
}

.alert-info {
    background-color: #dbeafe;
    color: #0c2340;
    border: 1px solid #bfdbfe;
}

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    max-width: 400px;
    z-index: 1000;
}

.toast-message {
    background: var(--dark);
    color: white;
    padding: 16px 20px;
    border-radius: 6px;
    margin-bottom: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    animation: slideIn 0.3s ease;
}

.toast-message.success {
    background: var(--success);
}

.toast-message.error {
    background: var(--danger);
}

.toast-message.warning {
    background: var(--warning);
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ==================== Sections ==================== */
.section {
    padding: 60px 20px;
    background: white;
    margin: 40px 0;
    border-radius: 12px;
}

.section h2 {
    font-size: 32px;
    margin-bottom: 40px;
    color: var(--dark);
}

/* ==================== Badge ==================== */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-primary {
    background: #dbeafe;
    color: #0c2340;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background: #fee2e2;
    color: #7f1d1d;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    .nav-menu {
        gap: 15px;
    }

    .logo {
        font-size: 20px;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 16px;
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .form-card {
        padding: 20px;
        margin: 20px 0;
    }

    .section {
        padding: 30px 20px;
    }

    .section h2 {
        font-size: 24px;
    }
}