/* ==========================================
   Soulution Aura - Think Tank Website Styles
   A sanctuary for thought. A laboratory for awareness.
   ========================================== */

/* ==========================================
   CSS Variables & Root Configurations
   ========================================== */
:root {
    /* Color Palette - Turquoise & Matte Gold */
    --color-primary: #40E0D0;           /* Turquoise */
    --color-primary-light: #7FECDF;     
    --color-primary-dark: #20B2AA;      
    --color-secondary: #D4AF37;         /* Matte Gold */
    --color-secondary-light: #E6C966;   
    --color-secondary-dark: #B8941F;    
    
    /* Neutral Colors - Generous White Space */
    --color-white: #FFFFFF;
    --color-off-white: #FAFAFA;
    --color-light-gray: #F5F5F5;
    --color-mid-gray: #E0E0E0;
    --color-dark-gray: #757575;
    --color-charcoal: #2C2C2C;
    --color-black: #0A0A0A;
    
    /* Typography */
    --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-fa: 'Vazirmatn', 'Tahoma', sans-serif;
    
    /* Font Sizes - Scalable and Breathable */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 2rem;        /* 32px */
    --text-4xl: 2.5rem;      /* 40px */
    --text-5xl: 3rem;        /* 48px */
    --text-6xl: 4rem;        /* 64px */
    
    /* Spacing - Generous White Space */
    --space-xs: 0.5rem;      /* 8px */
    --space-sm: 1rem;        /* 16px */
    --space-md: 1.5rem;      /* 24px */
    --space-lg: 2rem;        /* 32px */
    --space-xl: 3rem;        /* 48px */
    --space-2xl: 4rem;       /* 64px */
    --space-3xl: 6rem;       /* 96px */
    --space-4xl: 8rem;       /* 128px */
    
    /* Layout */
    --container-max: 1200px;
    --container-narrow: 800px;
    --container-wide: 1400px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows - Subtle and Soft */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-en);
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-charcoal);
    background-color: var(--color-white);
    overflow-x: hidden;
}

body[dir="rtl"] {
    font-family: var(--font-fa);
}

/* ==========================================
   Typography
   ========================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: var(--space-md);
    color: var(--color-black);
}

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(--space-md);
    color: var(--color-dark-gray);
}

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

/* ==========================================
   Layout Utilities
   ========================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section {
    padding: var(--space-3xl) 0;
}

/* ==========================================
   Language Toggle Button
   ========================================== */
.lang-toggle {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: 1000;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--color-white);
    border: 1px solid var(--color-mid-gray);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.lang-toggle:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

body[dir="rtl"] .lang-toggle {
    right: auto;
    left: var(--space-lg);
}

/* ==========================================
   Navigation
   ========================================== */
.nav-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-mid-gray);
    transition: var(--transition-base);
    height: 5rem !important;
}

.nav-inner {
    max-width: var(--container-wide);
    margin: 0 auto;
    /* padding: var(--space-md) var(--space-lg); */
    padding: 0.4rem 3rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: var(--text-lg);
    color: var(--color-black);
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--color-primary);
}

.logo-icon.small {
    width: 48px;
    height: 48px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    list-style: none;
}

.nav-links a {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-charcoal);
    padding: var(--space-xs) 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-base);
}

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-charcoal);
    transition: var(--transition-base);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, 
        var(--color-off-white) 0%, 
        rgba(64, 224, 208, 0.05) 50%, 
        rgba(212, 175, 55, 0.05) 100%);
    z-index: 0;
}

.aura-effect {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, 
        rgba(64, 224, 208, 0.15) 0%, 
        rgba(64, 224, 208, 0.05) 40%, 
        transparent 70%);
    animation: pulse 8s ease-in-out infinite;
    filter: blur(40px);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: var(--space-xl);
}

.hero-title {
    font-size: clamp(var(--text-4xl), 8vw, var(--text-6xl));
    font-weight: 300;
    color: var(--color-black);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(var(--text-lg), 3vw, var(--text-2xl));
    font-weight: 300;
    color: var(--color-dark-gray);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.hero-tagline {
    font-size: clamp(var(--text-base), 2.5vw, var(--text-xl));
    font-weight: 400;
    color: var(--color-primary-dark);
    margin-bottom: var(--space-2xl);
    font-style: italic;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-size: var(--text-base);
    font-weight: 500;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-base);
    border: 2px solid transparent;
    white-space: nowrap;
}

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

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

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

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* ==========================================
   Scroll Indicator
   ========================================== */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-line {
    display: block;
    width: 2px;
    height: 60px;
    background: linear-gradient(to bottom, 
        var(--color-primary), 
        transparent);
    animation: scrollDown 2s ease-in-out infinite;
}

/* ==========================================
   Introduction Section
   ========================================== */
.intro-section {
    background: var(--color-white);
}

.intro-content {
    max-width: var(--container-narrow);
    margin: 0 auto;
    text-align: center;
}

.intro-text {
    font-size: clamp(var(--text-lg), 2.5vw, var(--text-2xl));
    font-weight: 300;
    line-height: 1.8;
    color: var(--color-charcoal);
}

/* ==========================================
   Features Section
   ========================================== */
.features-section {
    background: var(--color-light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-2xl);
    max-width: var(--container-max);
    margin: 0 auto;
}

.feature-card {
    background: var(--color-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
    border: 1px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    color: var(--color-primary);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-title {
    font-size: var(--text-2xl);
    font-weight: 500;
    margin-bottom: var(--space-md);
    color: var(--color-black);
}

.feature-text {
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-dark-gray);
}

/* ==========================================
   Quote Section
   ========================================== */
.quote-section {
    background: linear-gradient(135deg, 
        rgba(64, 224, 208, 0.08) 0%, 
        rgba(212, 175, 55, 0.08) 100%);
    padding: var(--space-4xl) 0;
}

.main-quote {
    max-width: var(--container-narrow);
    margin: 0 auto;
    text-align: center;
    font-size: clamp(var(--text-xl), 3vw, var(--text-3xl));
    font-weight: 300;
    line-height: 1.7;
    color: var(--color-charcoal);
    font-style: italic;
    position: relative;
    padding: var(--space-xl);
}

.main-quote::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 120px;
    color: var(--color-primary);
    opacity: 0.2;
    line-height: 1;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--color-charcoal);
    color: var(--color-white);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
    text-align: center;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.footer-tagline {
    font-size: var(--text-base);
    color: var(--color-mid-gray);
    font-style: italic;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    justify-content: center;
    align-items: center;
}

.footer-links a {
    color: var(--color-mid-gray);
    font-size: var(--text-base);
    transition: var(--transition-base);
}

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

.footer-social {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap !important;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: var(--color-white);
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--color-primary);
    transform: translateY(-4px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-mid-gray);
    font-size: var(--text-sm);
}

.footer-name-link {
    color: var(--color-primary);
    text-decoration: none;
    transition: all 0.2s linear !important;
}

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

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 768px) {
    :root {
        --space-3xl: 4rem;
        --space-4xl: 5rem;
    }
    
    .nav-links {
        position: fixed;
        top: 73px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        gap: 0;
        padding: var(--space-lg);
        border-bottom: 1px solid var(--color-mid-gray);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-base);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links li {
        width: 100%;
        text-align: center;
        padding: var(--space-md) 0;
        border-bottom: 1px solid var(--color-light-gray);
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
}

@media (min-width: 769px) {
    .footer-content {
        grid-template-columns: 1fr 2fr 1fr;
        text-align: left;
    }
    
    .footer-brand {
        align-items: flex-start;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .footer-social {
        justify-content: flex-end;
    }
}

body[dir="rtl"] .footer-content {
    text-align: right;
}

body[dir="rtl"] .footer-brand {
    align-items: flex-end;
}

body[dir="rtl"] .footer-social {
    justify-content: flex-start;
}