/* 
 * AI Translation Platform - Core Styles
 * 
 * This stylesheet contains all the core styles for the AI Translation Platform.
 */

/* ===== Variables (Harmonized with Modern Design System) ===== */
:root {
    /* Colors - Now reference modern design system */
    --primary-color: var(--primary-600);
    --primary-dark: var(--primary-700);
    --primary-light: var(--primary-400);
    --secondary-color: var(--gray-500);
    --success-color: var(--success-500);
    --danger-color: var(--error-500);
    --warning-color: var(--warning-500);
    --info-color: var(--primary-500);
    
    /* Text colors */
    --text-color: var(--gray-900);
    --text-light: var(--gray-600);
    --text-white: #fff;
    
    /* Background colors */
    --bg-light: var(--gray-50);
    --bg-dark: var(--gray-800);
    --bg-white: #ffffff;
    
    /* Border */
    --border-color: var(--gray-200);
    --border-radius: var(--radius-lg);
    
    /* Spacing - Map to modern design system */
    --spacing-xs: var(--space-1);
    --spacing-sm: var(--space-2);
    --spacing-md: var(--space-4);
    --spacing-lg: var(--space-6);
    --spacing-xl: var(--space-12);
    
    /* Transitions */
    --transition: var(--transition-fast);
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--bg-light);
}

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ===== Layout ===== */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* ===== Header ===== */
.main-header {
    background-color: var(--bg-white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-md) var(--spacing-lg);
    min-height: 60px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.logo {
    flex: 0 0 auto;
    min-width: fit-content;
}

.logo a {
    display: flex;
    align-items: center;
    color: var(--text-color);
}

.logo h1 {
    font-size: 1.5rem;
    margin-left: var(--spacing-sm);
}

.main-nav {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    min-width: 0; /* Allow shrinking */
}

.main-nav ul {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    margin: 0;
    padding: 0;
}

.main-nav li {
    white-space: nowrap;
}

.main-nav a {
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.main-nav a:hover {
    color: var(--primary-color);
    background-color: rgba(30, 144, 255, 0.05);
}

.user-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 0 0 auto;
    min-width: fit-content;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.language-switcher {
    flex: 0 0 auto;
}

.language-switcher select {
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-white);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-light);
    font-size: 0.9rem;
    white-space: nowrap;
    flex: 0 0 auto;
}

/* User Dropdown Styles */
.user-dropdown {
    position: relative;
    display: inline-block;
}

.user-info-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-light);
    font-size: 0.9rem;
    white-space: nowrap;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.user-info-btn:hover {
    background-color: rgba(30, 144, 255, 0.05);
    color: var(--primary-color);
}

.user-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 200px;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    margin-top: var(--spacing-xs);
}

.user-dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
}

.dropdown-item:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
}

.dropdown-item i {
    width: 16px;
    text-align: center;
}

.dropdown-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: var(--spacing-xs) 0;
}

.logout-options, .login-options {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    align-items: center;
}

.btn-outline-sm {
    font-size: 0.8rem;
    padding: 0.25rem 0.5rem;
}

.sso-indicator {
    margin-left: var(--spacing-xs);
}

/* ===== Footer ===== */
.main-footer {
    background-color: var(--bg-dark);
    color: var(--text-white);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: var(--text-white);
    opacity: 0.8;
}

.footer-links a:hover {
    opacity: 1;
}

/* ===== Page Header ===== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.page-header h2 {
    font-size: 1.75rem;
    font-weight: 600;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.btn i {
    margin-right: 0.5rem;
}

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

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

.btn-primary-alt {
    color: var(--text-white);
    background-color: #28a745;
    border-color: #28a745;
}

.btn-primary-alt:hover {
    background-color: #218838;
    border-color: #1e7e34;
    color: var(--text-white);
}

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

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #5a6268;
    color: var(--text-white);
}

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

.btn-success:hover {
    background-color: #218838;
    border-color: #218838;
    color: var(--text-white);
}

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

.btn-danger:hover {
    background-color: #c82333;
    border-color: #c82333;
    color: var(--text-white);
}

.btn-outline {
    color: var(--text-color);
    background-color: transparent;
    border-color: var(--border-color);
}

.btn-outline:hover {
    background-color: var(--bg-light);
}

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

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

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.125rem;
}

/* ===== Cards ===== */
.card {
    background-color: var(--bg-white);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

.card-header h3 {
    font-size: 1.25rem;
    margin: 0;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-top: 1px solid var(--border-color);
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--bg-white);
    background-clip: padding-box;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-light);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(30, 144, 255, 0.25);
}

.form-select {
    display: block;
    width: 100%;
    padding: 0.5rem 2.25rem 0.5rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--bg-white);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    appearance: none;
}

.form-select:focus {
    border-color: var(--primary-light);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(30, 144, 255, 0.25);
}

.form-actions {
    margin-top: var(--spacing-lg);
}

/* ===== Tables ===== */
.table-container {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-weight: 600;
    background-color: var(--bg-light);
}

.table tr:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

/* ===== Alerts & Messages ===== */
.messages-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    max-width: 400px;
}

.message {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: relative;
    animation: slideIn 0.3s ease;
    transition: opacity 0.5s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.message.success {
    background-color: rgba(40, 167, 69, 0.1);
    border-left: 4px solid var(--success-color);
    color: #155724;
}

.message.error {
    background-color: rgba(220, 53, 69, 0.1);
    border-left: 4px solid var(--danger-color);
    color: #721c24;
}

.message.warning {
    background-color: rgba(255, 193, 7, 0.1);
    border-left: 4px solid var(--warning-color);
    color: #856404;
}

.message.info {
    background-color: rgba(23, 162, 184, 0.1);
    border-left: 4px solid var(--info-color);
    color: #0c5460;
}

.close-message {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    opacity: 0.5;
    transition: var(--transition);
}

.close-message:hover {
    opacity: 1;
}

/* ===== Translation Status ===== */
.translation-status {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.status-pending {
    background-color: rgba(255, 193, 7, 0.1);
    color: #856404;
}

.status-processing {
    background-color: rgba(23, 162, 184, 0.1);
    color: #0c5460;
}

.status-review {
    background-color: rgba(30, 144, 255, 0.1);
    color: #0066cc;
}

.status-completed {
    background-color: rgba(40, 167, 69, 0.1);
    color: #155724;
}

.status-failed {
    background-color: rgba(220, 53, 69, 0.1);
    color: #721c24;
}

/* ===== Loading Indicators ===== */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(30, 144, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
}

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

.loading-text {
    margin-top: var(--spacing-md);
    color: var(--text-light);
}

/* ===== Responsive Styles ===== */
@media (max-width: 1024px) {
    .main-nav ul {
        gap: var(--spacing-sm);
    }
    
    .main-nav a {
        font-size: 0.9rem;
        padding: var(--spacing-xs);
    }
    
    .user-controls {
        gap: var(--spacing-xs);
    }
}

@media (max-width: 768px) {
    .main-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: stretch;
    }
    
    .logo {
        align-self: center;
    }
    
    .main-nav {
        order: 2;
    }
    
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-sm);
    }
    
    .main-nav a {
        font-size: 0.875rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .user-controls {
        order: 1;
        width: 100%;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .language-switcher {
        order: 1;
    }
    
    .user-dropdown {
        order: 2;
    }
    
    .user-info-btn {
        font-size: 0.8rem;
    }
    
    .user-dropdown-menu {
        left: 0;
        right: auto;
        min-width: 180px;
    }
    
    .logout-options, .login-options {
        order: 3;
        flex: 1 1 100%;
        justify-content: center;
        margin-top: var(--spacing-xs);
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .main-nav ul {
        gap: var(--spacing-xs);
    }
    
    .main-nav a {
        font-size: 0.8rem;
        padding: 0.25rem 0.375rem;
    }
    
    .user-info {
        font-size: 0.75rem;
    }
    
    .btn-outline-sm {
        font-size: 0.75rem;
        padding: 0.2rem 0.4rem;
    }
}

/* ===== Utility Classes ===== */
.d-flex {
    display: flex;
}

.justify-content-between {
    justify-content: space-between;
}

.align-items-center {
    align-items: center;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-3 { margin-left: 1rem; }
.ml-4 { margin-left: 1.5rem; }
.ml-5 { margin-left: 3rem; }

.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 1rem; }
.mr-4 { margin-right: 1.5rem; }
.mr-5 { margin-right: 3rem; }