/* =========================================
   Condec — Architectural Design System
   Final refinement: Structural integration, tight rhythm
   ========================================= */

:root {
    /* Core Tokens */
    --color-decision-primary: #0B1F33;
    --color-context-secondary: #6B7280;
    
    /* Background System */
    --color-background-base: #FFFFFF;
    --color-background-subtle: #F8F9FA;
    --color-background-elevated: #FAFBFC;
    
    /* Text Colors */
    --color-text-primary: #0B1F33;
    --color-text-secondary: #4B5563;
    --color-text-muted: #6B7280;
    
    /* Typography Scale */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    
    /* Spacing Scale - Ultra-tight architectural rhythm */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.25rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4.5rem;
    
    /* Layout */
    --container-max: 1100px;
    --line-length-max: 68ch;
    --hero-max-width: 900px;
    
    /* Border */
    --border-subtle: rgba(11, 31, 51, 0.08);
}

/* =========================================
   Reset & Base
   ========================================= */

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

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

body {
    font-family: var(--font-family-primary);
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-background-base);
}

/* =========================================
   Typography
   ========================================= */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    color: var(--color-text-primary);
}

h1 {
    font-size: 4rem;
    font-weight: 600;
    letter-spacing: -0.03em;
}

h2 {
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

p {
    margin-bottom: 0.625rem;
    color: var(--color-text-secondary);
}

p:last-child {
    margin-bottom: 0;
}

a {
    color: var(--color-text-primary);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

a:hover {
    opacity: 0.7;
}

ul {
    list-style: none;
}

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

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

.section {
    padding: var(--space-2xl) 0;
    border-bottom: 1px solid var(--border-subtle);
}

.section:last-of-type {
    border-bottom: none;
}

.section-content {
    max-width: var(--hero-max-width);
}

.section-title {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

.section-body {
    font-size: 1.125rem;
    line-height: 1.5;
    font-weight: 300;
    color: var(--color-text-secondary);
}

.section-body p {
    margin-bottom: 0.625rem;
}

/* =========================================
   Header - Fixed & Minimal
   ========================================= */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
}

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

.logo {
    height: 32px;
    width: auto;
    transition: opacity 0.2s ease;
}

.logo:hover {
    opacity: 0.7;
}

/* =========================================
   Hero Section - Structurally Integrated Icon
   ========================================= */

.hero {
    position: relative;
    padding-top: calc(var(--space-3xl) + 64px);
    padding-bottom: var(--space-xl);
    background-color: var(--color-background-base);
}

.hero-background {
    display: none;
}

.hero-layout {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    max-width: var(--hero-max-width);
}

.hero-icon {
    flex-shrink: 0;
}

.hero-icon .icon {
    width: 152px;
    height: 152px;
    display: block;
    color: var(--color-decision-primary);
}

.hero-content {
    flex: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    background-color: var(--color-background-subtle);
    border: 1px solid var(--border-subtle);
    margin-bottom: 0.875rem;
}

.hero-headline {
    font-size: 4.5rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: 0.875rem;
    color: var(--color-text-primary);
}

.hero-subheadline {
    font-size: 1.375rem;
    font-weight: 300;
    line-height: 1.45;
    color: var(--color-text-secondary);
    margin-bottom: 0;
    max-width: 650px;
}

.hero-divider {
    width: 65%;
    height: 1px;
    background-color: rgba(11, 31, 51, 0.07);
    margin: var(--space-xl) auto 0 auto;
    max-width: var(--hero-max-width);
}

/* =========================================
   Content Sections - Ultra-Tight Spacing
   ========================================= */

.decision-list {
    margin: 0.625rem 0;
    padding-left: 1rem;
}

.decision-list li {
    position: relative;
    padding-left: 0;
    margin-bottom: 0.25rem;
    font-weight: 300;
    color: var(--color-text-secondary);
    line-height: 1.4;
}

.decision-list li::before {
    content: '•';
    position: absolute;
    left: -1rem;
    color: var(--color-decision-primary);
    opacity: 0.4;
}

.closing-statement,
.emphasis {
    font-weight: 400;
    margin-top: var(--space-lg);
    color: var(--color-text-primary);
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-decision-primary);
}

/* =========================================
   CTA Section - System Buttons
   ========================================= */

.cta-container {
    margin-top: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.cta-button {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background-color: var(--color-decision-primary);
    color: var(--color-background-base);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    border: none;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.cta-button:hover {
    opacity: 0.85;
}

.cta-divider {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 300;
}

.cta-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-decision-primary);
    border-bottom: 1px solid var(--color-decision-primary);
    padding-bottom: 1px;
}

.cta-link:hover {
    opacity: 0.7;
}

/* =========================================
   Footer - Minimal
   ========================================= */

.footer {
    padding: var(--space-2xl) 0 var(--space-xl) 0;
    border-top: 1px solid var(--border-subtle);
    background-color: var(--color-background-subtle);
}

.footer-content {
    max-width: var(--hero-max-width);
    text-align: center;
    margin: 0 auto;
}

.footer-tagline {
    font-size: 0.8125rem;
    font-weight: 400;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.footer-copyright {
    font-size: 0.8125rem;
    font-weight: 400;
    color: var(--color-text-muted);
    opacity: 0.7;
}

/* =========================================
   Section Backgrounds - Subtle Only
   ========================================= */

.section-why {
    background-color: var(--color-background-base);
}

.section-what {
    background-color: var(--color-background-subtle);
}

.section-who {
    background-color: var(--color-background-base);
}

.section-status {
    background-color: var(--color-background-elevated);
}

/* =========================================
   Responsive Design
   ========================================= */

/* Large Desktop - Maximum Authority */
@media (min-width: 1600px) {
    :root {
        --hero-max-width: 960px;
    }
    
    .hero-icon .icon {
        width: 168px;
        height: 168px;
    }
    
    .hero-headline {
        font-size: 5rem;
    }
}

/* Desktop - Strong Presence */
@media (min-width: 1280px) and (max-width: 1599px) {
    :root {
        --hero-max-width: 920px;
    }
    
    .hero-icon .icon {
        width: 160px;
        height: 160px;
    }
}

@media (max-width: 1024px) {
    .hero-headline {
        font-size: 3.75rem;
    }
    
    .hero-icon .icon {
        width: 126px;
        height: 126px;
    }
}

@media (max-width: 768px) {
    :root {
        --space-lg: 1rem;
        --space-xl: 1.75rem;
        --space-2xl: 2.5rem;
        --space-3xl: 3.5rem;
    }
    
    body {
        line-height: 1.55;
    }
    
    .hero {
        padding-top: calc(var(--space-2xl) + 64px);
    }
    
    .hero-layout {
        gap: 0.875rem;
    }
    
    .hero-icon .icon {
        width: 92px;
        height: 92px;
    }
    
    .hero-headline {
        font-size: 2.75rem;
    }
    
    .hero-subheadline {
        font-size: 1.125rem;
    }
    
    h2 {
        font-size: 0.8125rem;
    }
    
    .section-body {
        font-size: 1rem;
        line-height: 1.6;
    }
    
    .decision-list li {
        margin-bottom: 0.375rem;
    }
    
    .cta-container {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero-headline {
        font-size: 2.25rem;
    }
    
    .hero-subheadline {
        font-size: 1rem;
    }
    
    .hero-icon .icon {
        width: 76px;
        height: 76px;
    }
    
    .logo {
        height: 28px;
    }
    
    .section {
        padding: var(--space-xl) 0;
    }
}

/* =========================================
   Minimal Interactions
   ========================================= */

.section {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.fade-in {
    opacity: 0;
    transform: translateY(20px);
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Selection styling */
::selection {
    background-color: var(--color-decision-primary);
    color: var(--color-background-base);
}

::-moz-selection {
    background-color: var(--color-decision-primary);
    color: var(--color-background-base);
}