/* ===================================
   Evolut Consulting - Main CSS
   Global Styles, Navigation, Footer
   =================================== */

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

:root {
    /* Color Palette */
    --primary-red: #C41E3A;      /* South Africa red */
    --primary-gold: #D4AF37;     /* China gold */
    --accent-navy: #1a1a2e;      /* Dark navy */
    --text-dark: #2c2c2c;
    --text-medium: #555555;
    --text-light: #777777;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gray: #e9ecef;
    --border-color: #dee2e6;

    /* Spacing System */
    --spacing-xs: 0.5rem;    /* 8px */
    --spacing-sm: 1rem;      /* 16px */
    --spacing-md: 2rem;      /* 32px */
    --spacing-lg: 4rem;      /* 64px */
    --spacing-xl: 6rem;      /* 96px */

    /* Typography */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Noto Sans SC', sans-serif;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

/* Language Display */
[data-lang="zh"].hidden,
[data-lang="en"].hidden {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    position: absolute !important;
    left: -9999px !important;
}

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

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    line-height: 1.7;
    background: var(--bg-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--accent-navy);
    margin-bottom: var(--spacing-sm);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-medium);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.container-narrow {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.container-wide {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
}

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

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 70px;
}

/* Logo/Brand */
.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-brand-logo {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-gold) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
    font-family: var(--font-heading);
    font-size: 1.25rem;
}

.nav-brand a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--accent-navy);
    font-weight: 600;
    font-size: 1.25rem;
}

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

/* Navigation Menu */
.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-red), var(--primary-gold));
    transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover {
    color: var(--primary-red);
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    margin-left: var(--spacing-md);
    align-items: center;
}

.lang-toggle-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 2px solid var(--primary-gold);
    background: white;
    color: var(--accent-navy);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-toggle-btn:hover {
    background: linear-gradient(135deg, var(--primary-red), var(--primary-gold));
    color: white;
    border-color: transparent;
    transform: scale(1.05);
}

.lang-toggle-btn:active {
    transform: scale(0.98);
}

.lang-icon {
    font-size: 1.2rem;
}

.lang-text {
    min-width: 35px;
    text-align: center;
}

/* Old lang-btn styles (for backwards compatibility) */
.lang-btn {
    padding: 6px 12px !important;
    border: 1px solid #ddd !important;
    background: white !important;
    color: var(--text-medium) !important;
    font-weight: 500 !important;
    font-size: 0.875rem !important;
    border-radius: var(--radius-full) !important;
    cursor: pointer;
    transition: var(--transition-fast);
    display: inline-block !important;
    visibility: visible !important;
    opacity: 1 !important;
    min-width: 60px !important;
}

.lang-btn:hover {
    border-color: var(--primary-red) !important;
    color: var(--primary-red) !important;
}

.lang-btn.active {
    background: linear-gradient(135deg, var(--primary-red), var(--primary-gold)) !important;
    color: white !important;
    border-color: transparent !important;
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition-normal);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--accent-navy);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand h3 {
    color: var(--primary-gold);
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.footer-column h4 {
    color: var(--primary-gold);
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-body);
    font-weight: 600;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--primary-gold);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    margin: 0;
}

/* ===================================
   Components
   =================================== */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-normal);
    font-family: var(--font-body);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-red), var(--primary-gold));
    color: white;
    box-shadow: 0 4px 12px rgba(196, 30, 58, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(196, 30, 58, 0.4);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

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

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

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

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

/* Section Styling */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-medium);
    max-width: 600px;
    margin: 0 auto;
}

/* Grid Systems */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

/* ===================================
   Utility Classes
   =================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.pt-sm { padding-top: var(--spacing-sm); }
.pt-md { padding-top: var(--spacing-md); }
.pt-lg { padding-top: var(--spacing-lg); }

.pb-sm { padding-bottom: var(--spacing-sm); }
.pb-md { padding-bottom: var(--spacing-md); }
.pb-lg { padding-bottom: var(--spacing-lg); }

.bg-light { background: var(--bg-light); }
.bg-white { background: white; }
.bg-gradient {
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-gold) 100%);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .nav-menu {
        gap: var(--spacing-sm);
    }

    .nav-link {
        font-size: 0.875rem;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: white;
        width: 100%;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transition: left var(--transition-normal);
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link {
        padding: var(--spacing-sm) 0;
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }

    .lang-switcher {
        margin: var(--spacing-sm) 0 0 0;
        justify-content: center;
    }

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

    .grid-4 {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .btn {
        width: 100%;
    }
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* ===================================
   Partners Page Styles
   =================================== */

/* Partners Hero */
.partners-hero {
    background: linear-gradient(135deg, var(--accent-navy) 0%, var(--primary-red) 100%);
    position: relative;
}

/* Intro Section */
.intro-section {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.intro-content {
    max-width: 800px;
    margin: 0 auto;
}

.intro-text {
    font-size: 1.125rem;
    color: var(--text-medium);
    line-height: 1.8;
}

/* Partners Section */
.partners-section {
    padding: var(--spacing-xl) 0;
}

.section-light {
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    color: var(--accent-navy);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--text-light);
    font-size: 1.125rem;
}

/* Partners Grid */
.partners-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

/* Partner Full Card */
.partner-full-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition-normal);
}

.partner-full-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

/* Partner Company Section */
.partner-company {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 2px solid var(--bg-gray);
}

.partner-logo-wrapper {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.partner-logo-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-gold) 0%, var(--primary-red) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2.5rem;
}

.partner-info {
    flex: 1;
}

.partner-name {
    font-size: 1.5rem;
    color: var(--accent-navy);
    margin-bottom: 0.25rem;
}

.partner-fullname {
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.partner-description {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

/* Cooperation Areas */
.cooperation-areas {
    margin-top: var(--spacing-sm);
}

.areas-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-navy);
    display: block;
    margin-bottom: 0.5rem;
}

.areas-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.area-tag {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.813rem;
    color: var(--text-medium);
    font-weight: 500;
}

/* Partner Testimonial Section */
.partner-testimonial {
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.05) 0%, rgba(196, 30, 58, 0.05) 100%);
    position: relative;
}

.testimonial-icon {
    font-size: 1.5rem;
    color: var(--primary-gold);
    margin-bottom: var(--spacing-sm);
    opacity: 0.6;
}

.testimonial-text {
    font-size: 1.063rem;
    font-style: italic;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-heading);
}

.testimonial-author {
    font-size: 0.938rem;
    color: var(--text-medium);
    font-weight: 500;
    text-align: right;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--accent-navy) 100%);
    color: white;
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.cta-title {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.cta-text {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

/* Responsive Styles for Partners Page */
@media (max-width: 768px) {
    .partner-company {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .partner-logo-wrapper {
        width: 100px;
        height: 100px;
    }

    .areas-tags {
        justify-content: center;
    }

    .intro-text {
        font-size: 1rem;
    }

    .testimonial-text {
        font-size: 1rem;
    }

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