/**
 * RIVUS360 Dev Template - Frontend Styles
 * =========================================
 * Complete standalone stylesheet for the public-facing website.
 * Completely separated from backend styles for independent theming.
 */

/* =============================================================================
   CSS VARIABLES (Frontend)
   ============================================================================= */

:root {
    /* Colors - Override these via SiteSettings */
    --primary: #007bff;
    --primary-dark: #0056b3;
    --secondary: #6c757d;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;
    --light: #f8f9fa;
    --dark: #343a40;
    --white: #ffffff;

    /* Text Colors */
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #9ca3af;

    /* Border & Shadow */
    --border-color: #dee2e6;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);

    /* Spacing & Sizing */
    --radius: 8px;
    --radius-lg: 12px;
}

/* =============================================================================
   RESET & BASE
   ============================================================================= */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* =============================================================================
   TYPOGRAPHY
   ============================================================================= */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p { margin-bottom: 1rem; }

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

a:hover {
    text-decoration: underline;
}

/* =============================================================================
   LAYOUT
   ============================================================================= */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.container-narrow {
    max-width: 800px;
}

.site-main {
    flex: 1;
}

/* =============================================================================
   HEADER & NAVIGATION
   ============================================================================= */

.site-header {
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.875rem 1.5rem;
    gap: 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    flex-shrink: 0;
}

.logo:hover {
    text-decoration: none;
    color: var(--primary);
}

.nav-spacer {
    flex: 1;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

/* =============================================================================
   LANGUAGE SELECTOR
   ============================================================================= */

.language-selector {
    position: relative;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.language-btn:hover {
    background: var(--light);
    border-color: var(--text-secondary);
}

.language-btn svg {
    flex-shrink: 0;
}

.language-code {
    font-weight: 600;
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    width: 280px;
    max-height: 400px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.5rem);
    transition: all 0.2s ease;
    z-index: 200;
    overflow: hidden;
}

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

.language-dropdown-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.language-dropdown-content {
    max-height: 320px;
    overflow-y: auto;
    padding: 0.5rem;
}

.language-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.625rem 0.75rem;
    border-radius: calc(var(--radius) - 2px);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: background 0.15s ease;
}

.language-option:hover {
    background: var(--light);
    text-decoration: none;
}

.language-option.active {
    background: var(--primary);
    color: var(--white);
}

.language-option .lang-name {
    font-weight: 500;
}

.language-option .lang-code {
    font-size: 0.75rem;
    opacity: 0.7;
}

/* =============================================================================
   BUTTONS
   ============================================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
}

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

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

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

.btn-success:hover {
    background: #218838;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
}

/* =============================================================================
   HERO SECTION
   ============================================================================= */

.hero {
    padding: 6rem 0;
    text-align: center;
    background: linear-gradient(135deg, var(--light) 0%, var(--white) 100%);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* =============================================================================
   FEATURES SECTION
   ============================================================================= */

.features {
    padding: 4rem 0;
}

.features h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    text-align: center;
    transition: box-shadow 0.2s ease;
}

.feature-card:hover {
    box-shadow: var(--shadow);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* =============================================================================
   AUTH SECTION (Login/Register)
   ============================================================================= */

.auth-section {
    padding: 4rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 200px);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    padding: 2rem;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.auth-card h1 {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.auth-links {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
}

/* =============================================================================
   FORMS
   ============================================================================= */

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.form-group label {
    font-weight: 500;
    font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-control {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    width: 100%;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-checkbox {
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
}

.form-checkbox input[type="checkbox"] {
    width: auto;
}

.form-errors {
    padding: 1rem;
    background: #fff5f5;
    border: 1px solid var(--danger);
    border-radius: var(--radius);
}

.error {
    color: var(--danger);
    font-size: 0.875rem;
}

/* =============================================================================
   MESSAGES / ALERTS
   ============================================================================= */

.messages-container {
    padding: 1rem 0;
}

.messages-container:empty {
    display: none;
    padding: 0;
}

.message {
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: messageSlideIn 0.3s ease;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-success {
    background: #d4edda;
    color: #155724;
}

.message-error {
    background: #f8d7da;
    color: #721c24;
}

.message-info {
    background: #d1ecf1;
    color: #0c5460;
}

.message-warning {
    background: #fff3cd;
    color: #856404;
}

.message-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.5;
}

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

/* =============================================================================
   LEGAL PAGES
   ============================================================================= */

.legal-page {
    padding: 4rem 0;
}

.legal-page h1 {
    margin-bottom: 2rem;
}

.legal-content h2 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.legal-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.legal-content h4 {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.legal-content ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.last-updated {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 2rem;
}

/* =============================================================================
   ERROR PAGES
   ============================================================================= */

.error-page {
    padding: 6rem 0;
    text-align: center;
}

.error-content h1 {
    font-size: 8rem;
    color: var(--danger);
    margin-bottom: 1rem;
}

.error-content h2 {
    margin-bottom: 1rem;
}

.error-content p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* =============================================================================
   FOOTER
   ============================================================================= */

.site-footer {
    background: var(--light);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-info {
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--primary);
}

/* =============================================================================
   UTILITY CLASSES
   ============================================================================= */

.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-muted { color: var(--text-secondary); }
.text-center { text-align: center; }

/* =============================================================================
   RESPONSIVE
   ============================================================================= */

@media (max-width: 768px) {
    .main-nav {
        padding: 0.75rem 1rem;
        gap: 0.75rem;
    }

    .nav-actions {
        gap: 0.5rem;
    }

    .language-btn .language-code {
        display: none;
    }

    .language-btn {
        padding: 0.5rem;
    }

    .language-dropdown {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        max-height: 70vh;
        border-radius: var(--radius) var(--radius) 0 0;
        transform: translateY(100%);
    }

    .language-dropdown.show {
        transform: translateY(0);
    }

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

    .hero h1 {
        font-size: 2rem;
    }

    .hero {
        padding: 4rem 0;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}