/* =============================================
   M5 PLATFORM - DESIGN SYSTEM
   Based on TitleChain Foundation with modern enhancements
   ============================================= */

/* =============================================
   COLOR PALETTE
   ============================================= */
:root {
    /* Primary Brand Colors - From TitleChain */
    --color-gold: #C9A854;
    --color-gold-dark: #B89644;
    --color-navy: #1A2332;
    --color-navy-light: #2A3442;
    --color-magenta: #C2185B;
    --color-magenta-light: #E91E63;
    
    /* Modern Enhancement Colors */
    --color-cyan: #00BCD4;
    --color-purple: #7C4DFF;
    --color-teal: #00897B;
    --color-orange: #FF6F00;
    
    /* Neutrals */
    --color-white: #FFFFFF;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;
    
    /* Semantic Colors */
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    --color-info: #3B82F6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

/* =============================================
   RESET & BASE STYLES
   ============================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* =============================================
   TYPOGRAPHY
   ============================================= */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-navy);
}

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

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

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

/* =============================================
   HEADER
   ============================================= */
.main-header {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

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

.logo-section {
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-navy);
    letter-spacing: -0.02em;
}

.logo-subtitle {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-gray-500);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-top: -4px;
}

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

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.nav-link:hover {
    color: var(--color-navy);
    background-color: var(--color-gray-100);
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background-color: #1e293b;
    color: white;
    border: 2px solid #1e293b;
}

.btn-primary:hover {
    background-color: #334155;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(30, 41, 59, 0.1), 0 2px 4px -1px rgba(30, 41, 59, 0.06);
}

.btn-capital {
    background-color: #1e293b;
    color: white;
    border: 2px solid #1e293b;
}

.btn-capital:hover {
    background-color: #334155;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(30, 41, 59, 0.1), 0 2px 4px -1px rgba(30, 41, 59, 0.06);
}

.btn-bank {
    background-color: #334155;
    color: white;
    border: 2px solid #334155;
}

.btn-bank:hover {
    background-color: #475569;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(51, 65, 85, 0.1), 0 2px 4px -1px rgba(51, 65, 85, 0.06);
}

.btn-cta {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

.btn-arrow {
    transition: transform var(--transition-base);
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero-section {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
    padding: var(--spacing-3xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(201, 168, 84, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(0, 188, 212, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-300);
    max-width: 800px !important;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.8;
    text-align: center;
    padding: 0 2rem;
    display: block;
}

.hero-tagline {
    display: inline-block;
    background-color: var(--color-gold);
    color: var(--color-navy);
    padding: var(--spacing-sm) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-top: var(--spacing-lg);
}

/* =============================================
   PLATFORM SELECTION
   ============================================= */
.platform-selection {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-gray-50);
}

.section-intro {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 1.125rem;
    color: #6B7280;
    max-width: 800px !important;
    margin: 0 auto;
    line-height: 1.8;
    text-align: center;
    padding: 0 2rem;
    display: block;
}
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-xl);
}

.platform-card {
    background-color: var(--color-white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-slow);
    display: flex;
    flex-direction: column;
    border: 2px solid transparent;
}

.platform-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.capital-card {
    border-color: var(--color-gold);
}

.capital-card:hover {
    border-color: var(--color-gold-dark);
    box-shadow: 0 20px 25px -5px rgba(201, 168, 84, 0.2);
}

.bank-card {
    border-color: var(--color-navy);
}

.bank-card:hover {
    border-color: var(--color-navy-light);
    box-shadow: 0 20px 25px -5px rgba(26, 35, 50, 0.2);
}

.card-header {
    margin-bottom: var(--spacing-lg);
}

.card-logo {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-navy);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-xs);
}

.card-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.card-description {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.card-features {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    font-weight: 500;
    padding-left: var(--spacing-md);
    position: relative;
}

.feature-item::before {
    content: '';
    position: absolute;
    left: 0;
    width: 4px;
    height: 4px;
    background-color: var(--color-gold);
    border-radius: 50%;
}

.card-audience {
    background-color: var(--color-gray-50);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.card-audience strong {
    color: var(--color-navy);
}

.card-footer {
    margin-top: auto;
}

/* =============================================
   ABOUT SECTION
   ============================================= */
.about-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.principle-list {
    display: grid;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.principle-item h4 {
    color: var(--color-gold);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
}

.principle-item p {
    color: var(--color-gray-600);
    line-height: 1.7;
}

.about-visual {
    display: grid;
    gap: var(--spacing-lg);
}

.stat-card {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    color: var(--color-white);
}

.stat-number {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    color: var(--color-gold);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: var(--font-size-base);
    color: var(--color-gray-300);
    font-weight: 500;
}

/* =============================================
   FOUNDATION SECTION
   ============================================= */
.foundation-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-gray-50);
}

.foundation-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.foundation-text {
    font-size: 1.125rem;
    color: #6B7280;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    max-width: 800px !important;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    padding: 0 2rem;
    display: block;
}

.foundation-roles {
    display: grid;
    gap: var(--spacing-lg);
}

.role-block h4 {
    color: var(--color-navy);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.role-block ul {
    list-style: none;
    padding: 0;
}

.role-block li {
    padding: var(--spacing-xs) 0;
    color: var(--color-gray-700);
    position: relative;
    padding-left: var(--spacing-lg);
}

.role-block li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-gold);
    font-weight: 600;
}

.foundation-right {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.foundation-cta {
    display: block;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-2xl);
    border: 2px solid var(--color-gold);
    transition: all var(--transition-slow);
}

.foundation-cta:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-gold-dark);
}

.icsn-cta {
    border-color: #00BCD4;
    background: linear-gradient(135deg, #1A2332 0%, #2A3442 100%);
}

.icsn-cta:hover {
    border-color: #00BCD4;
    box-shadow: 0 20px 25px -5px rgba(0, 188, 212, 0.3);
}

.icsn-cta .foundation-logo {
    color: #00BCD4;
}

.foundation-cta-content {
    color: var(--color-white);
}

.foundation-logo {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-gold);
    margin-bottom: var(--spacing-xs);
    line-height: 1.2;
}

.foundation-tagline {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.foundation-cta-content p {
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.link-arrow {
    display: inline-block;
    color: var(--color-gold);
    font-weight: 600;
    transition: transform var(--transition-base);
}

.foundation-cta:hover .link-arrow {
    transform: translateX(8px);
}

/* =============================================
   CTA SECTION
   ============================================= */
.cta-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
    text-align: center;
}

.cta-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.cta-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-300);
    max-width: 800px !important;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.8;
    text-align: center;
    padding: 0 2rem;
    display: block;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

/* =============================================
   FOOTER - Handled by universal-footer.css
   ============================================= */
/* All footer styles moved to css/universal-footer.css */
/* DO NOT ADD FOOTER STYLES HERE */


/* =============================================
   RESPONSIVE DESIGN
   ============================================= */
@media (max-width: 1024px) {
    .platform-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid,
    .foundation-split {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .main-nav {
        display: none; /* Simple mobile handling - can be enhanced with hamburger menu */
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .platform-grid {
        grid-template-columns: 1fr;
    }
    
    .platform-card {
        padding: var(--spacing-lg);
    }
}