/*
================================================================================
Sublinur Website - Main Styles
================================================================================
*/

/* ============================================================================
   CSS Variables
   ============================================================================ */
:root {
    /* Colors - Middle Eastern Luxury Theme */
    --primary-color: #013220;      /* Imperial Green - 皇室深绿 */
    --primary-light: #045D3B;      /* Islamic Green - 伊斯兰绿 */
    --primary-dark: #002216;       /* Deep Forest Green */
    --secondary-color: #C5A059;    /* Champagne Gold - 香槟金 */
    --secondary-light: #D4AF37;    /* Metallic Gold - 金属金 */
    --secondary-dark: #A68041;     /* Burnished Gold - 古铜金 */
    --accent-color: #C5A059;       /* Gold as accent */
    
    /* Neutral Colors */
    --bg-color: #FDFCF8;           /* Pearl White - 珍珠暖白 */
    --bg-gray: #F5F3ED;            /* Alabaster - 石膏灰 */
    --bg-gray-dark: #EAE5D8;       /* Warm Sand - 暖沙色 */
    --text-primary: #1A1A1A;       /* Near Black */
    --text-secondary: #4A4A4A;     /* Soft Charcoal */
    --text-muted: #8E8E8E;         /* Medium Gray */
    --border-color: #E2DCC8;       /* Gold-tinted border */
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Playfair Display', 'Noto Serif SC', 'Noto Serif Arabic', serif; /* Elegant Serif for Headings */
    --font-secondary: 'Noto Sans SC', sans-serif;
    --font-arabic: 'Noto Sans Arabic', sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.75rem;
    --text-5xl: 3.5rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;
    --spacing-3xl: 8rem;
    
    /* Border Radius - More sophisticated, less "bubbly" */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Shadows - Multi-layered, soft shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(1, 50, 32, 0.08);
    --shadow-lg: 0 12px 24px rgba(1, 50, 32, 0.12);
    --shadow-xl: 0 24px 48px rgba(1, 50, 32, 0.16);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --container-max-width: 1240px;
    --container-padding: 2rem;
    --header-height: 90px;
}

    /* Prevent flash of untranslated content: hide until translations applied */
    .lang-loading {
        visibility: hidden !important;
        opacity: 0 !important;
    }

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

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

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Chinese Font */
body:lang(zh) {
    font-family: var(--font-secondary);
}

/* Arabic Font */
body:lang(ar) {
    font-family: var(--font-arabic);
}

/* ============================================================================
   Typography
   ============================================================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading); /* Use Serif for Headings */
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
    letter-spacing: -0.01em;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: var(--text-base);
    line-height: 1.7;
}

/* ============================================================================
   Layout & Backgrounds
   ============================================================================ */
body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-color);
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23E2DCC8' fill-opacity='0.15'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6zM36 4V0h-2v4h-4v2h4v4h2V6h4V4h-4z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    -webkit-font-smoothing: antialiased;
}

/* Section Specific Overrides */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M50 50l25 25M50 50l-25 25M50 50l25-25M50 50l-25-25' stroke='%23C5A059' stroke-opacity='0.05' fill='none'/%3E%3C/svg%3E");
    pointer-events: none;
}

.hero-title {
    color: white;
}

.hero-subtitle {
    color: rgba(255, 255, 255, 0.85) !important;
}

.btn {
    display: inline-block;
    padding: 0.85rem 1.75rem;
    font-size: var(--text-base);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.btn-primary {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    border: none;
}

.btn-primary:hover {
    background-color: var(--secondary-light);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(197, 160, 89, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
    background-color: rgba(255,255,255,0.1);
    border-color: white;
    color: white;
}

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

.btn-accent:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: var(--text-lg);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: var(--text-sm);
}

.btn-block {
    width: 100%;
    display: block;
}

/* ============================================================================
   Card Components
   ============================================================================ */
.card {
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

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

.card-title {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.card-text {
    font-size: var(--text-base);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

/* ============================================================================
   Form Components
   ============================================================================ */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* Contact Form Specific Styles */
.contact-form {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 8px rgba(2, 82, 54, 0.08);
    border: 1px solid var(--border-color);
}

.contact-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 0;
}

.contact-form .form-group {
    margin-bottom: 1.5rem;
}

.contact-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.contact-form label i {
    color: var(--primary-color);
    margin-right: 0.5rem;
    width: 16px;
    display: inline-block;
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form input[type="tel"],
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-gray);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    font-family: inherit;
}

.contact-form input[type="text"]:focus,
.contact-form input[type="email"]:focus,
.contact-form input[type="tel"]:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--bg-color);
    box-shadow: 0 0 0 4px rgba(2, 82, 54, 0.1);
}

.contact-form select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23025236' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.contact-form textarea {
    resize: vertical;
    min-height: 140px;
    max-height: 300px;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder,
.contact-form select option[value=""] {
    color: var(--text-muted);
    opacity: 0.7;
}

/* Responsive adjustments for contact form */
@media (max-width: 768px) {
    .contact-form .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
}

/* Contact Page Layout */
.contact-layout {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: start;
}

@media (max-width: 1023px) {
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

/* Contact Information Cards */
.contact-info-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-info-card {
    background: var(--bg-color);
    padding: 1.75rem;
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    transition: all var(--transition-base);
    box-shadow: 0 2px 8px rgba(2, 82, 54, 0.05);
}

.contact-info-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(2, 82, 54, 0.12);
    transform: translateY(-2px);
}

.contact-info-card > div:first-child:not(.contact-info-icon) {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.contact-info-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info-icon i {
    font-size: 1.5rem;
}

.contact-info-content {
    flex: 1;
}

.contact-info-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.contact-link {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
    transition: color var(--transition-base);
}

.contact-link:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.contact-hours {
    display: block;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.contact-address {
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
    font-size: 0.95rem;
}

/* Social Media Card */
.social-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.social-links-grid {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.social-icon-btn {
    width: 44px;
    height: 44px;
    background: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all var(--transition-base);
    font-size: 1.1rem;
}

.social-icon-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(2, 82, 54, 0.3);
}

/* Responsive adjustments for contact info */
@media (max-width: 768px) {
    .contact-info-card {
        padding: 1.5rem;
    }
    
    .contact-info-icon {
        width: 48px;
        height: 48px;
    }
    
    .contact-info-icon i {
        font-size: 1.25rem;
    }
    
    .contact-info-content h3 {
        font-size: 1.1rem;
    }
}

/* ============================================================================
   Grid System
   ============================================================================ */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ============================================================================
   Flex Utilities
   ============================================================================ */
.flex {
    display: flex;
}

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

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

.flex-column {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

/* ============================================================================
   Header / Navigation
   ============================================================================ */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-color);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

.main-header.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar {
    height: var(--header-height);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 var(--container-padding);
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.nav-logo img {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    margin: 0;
}

.nav-menu a {
    font-weight: 500;
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: color var(--transition-base);
}

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

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between; /* keep nav and controls stable */
    gap: var(--spacing-md);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.language-switcher {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

/* Language buttons: keep a stable size to avoid layout shift when labels change */
.lang-btn {
    padding: 0.45rem 0.6rem;
    font-size: var(--text-sm);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    /* limit transitions to non-layout properties */
    transition: background-color var(--transition-base), color var(--transition-base), transform var(--transition-base);
    color: var(--text-secondary);
    box-sizing: border-box;
    white-space: nowrap;
    min-width: 3.2rem; /* reserve space for longer labels like 中文 / العربية */
    text-align: center;
}

/* Keep language switcher internal layout stable when page direction changes (rtl/ltr) */
.language-switcher {
    direction: ltr; /* keep button order and alignment consistent */
    unicode-bidi: isolate; /* prevent bidi reordering from parent */
}

/* Slightly larger min-width for Arabic label to avoid shrink/expand */
.lang-btn {
    min-width: 3.6rem;
}

.lang-btn:hover,
.lang-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   Ensure initial language button visual matches document <html lang="...">.
   This prevents a visible flip from the static 'EN' active class to the saved
   preferred language when navigating between pages.
   More specific selector to override .lang-btn.active if needed.
   ------------------------------------------------------------------------ */
html[lang="en"] .nav-controls .language-switcher .lang-btn[data-lang-code="en"],
html[lang="zh"] .nav-controls .language-switcher .lang-btn[data-lang-code="zh"],
html[lang="ar"] .nav-controls .language-switcher .lang-btn[data-lang-code="ar"] {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

/* Hide language switcher while translations are being applied (lang-loading).
   This gives a smoother, non-jumpy experience when page-level language state
   is updated on load. */
.lang-loading .nav-controls .language-switcher {
    visibility: hidden !important;
    opacity: 0 !important;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: all var(--transition-base);
    border-radius: 2px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ============================================================================
   Fonts Import
   ============================================================================ */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@700&family=Inter:wght@400;500;600;700&display=swap');

/* ============================================================================
   Footer
   ============================================================================ */
.main-footer {
    background-color: var(--primary-color);
    color: #F5F3ED;
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    position: relative;
    border-top: 1px solid var(--secondary-color);
}

.main-footer::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M20 20L40 40M20 20L0 0M20 20L40 0M20 20L0 40' stroke='%23C5A059' stroke-opacity='0.03' fill='none'/%3E%3C/svg%3E");
    pointer-events: none;
}

.footer-section h3 {
    font-family: var(--font-heading);
    color: var(--secondary-color);
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-md);
}

.footer-section a {
    color: rgba(245, 243, 237, 0.7);
    font-size: 0.9rem;
}

.footer-section a:hover {
    color: var(--secondary-color);
}

.newsletter-form input {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(197, 160, 89, 0.3);
    color: white;
}

.social-links a {
    background-color: rgba(197, 160, 89, 0.1);
    color: var(--secondary-color);
    border: 1px solid rgba(197, 160, 89, 0.2);
}

.social-links a:hover {
    background-color: var(--secondary-color);
    color: var(--primary-color);
}

/* Timeline Luxury Update */
.timeline-year { 
    color: var(--secondary-color); 
    font-family: var(--font-heading);
}

.timeline-item {
    border-left: 2px solid var(--border-color);
    padding-left: 2rem;
    margin-left: 1rem;
    grid-template-columns: 1fr;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -7px;
    top: 5px;
    width: 12px;
    height: 12px;
    background: var(--secondary-color);
    border-radius: 50%;
}

/* Mobile Nav Colors */
.mobile-menu-toggle span {
    background-color: var(--primary-color);
}

.mobile-menu-toggle.active span {
    background-color: var(--secondary-color);
}