/* ===================================
   HammerAI Website - Minimalist Design
   Presentation-Style Aesthetic
   =================================== */

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

:root {
    /* Colors - Minimalist Palette */
    --color-dark: #1a1a1a;
    --color-gray: #666666;
    --color-light-gray: #f5f5f5;
    --color-white: #ffffff;
    --color-accent: #0066cc;
    --color-accent-light: #e6f2ff;
    --color-border: #e0e0e0;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray);
}

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    padding: 1.25rem 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-dark);
    letter-spacing: -0.5px;
}

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

.nav-links a {
    color: var(--color-gray);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--color-accent);
}

.btn-nav {
    background-color: var(--color-dark);
    color: var(--color-white) !important;
    padding: 0.625rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
}

.btn-nav:hover {
    background-color: var(--color-accent);
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: var(--color-dark);
}

.section-subtitle {
    font-size: 1.25rem;
    text-align: center;
    color: var(--color-gray);
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    font-style: italic;
}

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: var(--spacing-xl) 0;
    background-color: var(--color-light-gray);
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.hero-meta {
    font-size: 0.875rem;
    color: var(--color-gray);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Shift Section */
.shift-section {
    background-color: var(--color-white);
}

.shift-section .section-title {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--spacing-lg);
}

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

.shift-card {
    padding: var(--spacing-md);
    background-color: var(--color-light-gray);
    border-radius: 8px;
}

.shift-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.shift-card p {
    font-size: 1rem;
    line-height: 1.6;
}

.shift-quote {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-dark);
    font-style: italic;
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* Who Section */
.who-section {
    background-color: var(--color-dark);
    color: var(--color-white);
}

.who-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.who-title {
    font-size: 2rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.who-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

.who-details p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.who-highlight {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-white);
    font-style: italic;
}

/* Problem Section */
.problem-section {
    background-color: var(--color-white);
}

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

.problem-card {
    padding: var(--spacing-md);
    background-color: var(--color-light-gray);
    border-radius: 8px;
}

.problem-card h4 {
    font-size: 1.125rem;
    color: var(--color-dark);
    line-height: 1.5;
}

.regulatory-box {
    background-color: var(--color-accent-light);
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--color-accent);
}

.regulatory-box h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.regulatory-quote {
    font-size: 1.125rem;
    font-style: italic;
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

.regulatory-list {
    list-style: none;
    margin: 0;
}

.regulatory-list li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--color-gray);
}

.regulatory-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 900;
    font-size: 1.5rem;
}

.core-problem {
    background-color: var(--color-light-gray);
    padding: var(--spacing-lg);
    border-radius: 8px;
}

.core-problem h3 {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

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

.core-problem-item {
    text-align: center;
}

.core-problem-item h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-dark);
}

.core-problem-item p {
    font-size: 0.9375rem;
}

.core-problem-summary {
    text-align: center;
    font-size: 1rem;
    color: var(--color-gray);
    max-width: 800px;
    margin: var(--spacing-md) auto 0;
}

/* Solution Section */
.solution-section {
    background-color: var(--color-light-gray);
}

.solution-framework {
    max-width: 900px;
    margin: 0 auto;
}

.framework-layer {
    background-color: var(--color-white);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--color-accent);
}

.layer-header {
    margin-bottom: var(--spacing-sm);
}

.layer-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-dark);
}

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

.layer-function,
.layer-value {
    font-size: 0.9375rem;
    line-height: 1.6;
}

.layer-function strong,
.layer-value strong {
    color: var(--color-dark);
    display: block;
    margin-bottom: 0.25rem;
}

/* How It Works Section */
.how-section {
    background-color: var(--color-white);
}

.phase-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.phase-card {
    background-color: var(--color-light-gray);
    padding: var(--spacing-lg);
    border-radius: 8px;
}

.phase-header {
    margin-bottom: var(--spacing-md);
}

.phase-number {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.phase-header h3 {
    font-size: 1.5rem;
    color: var(--color-dark);
}

.phase-intro {
    font-size: 1rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.phase-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.phase-step {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 6px;
}

.phase-step h4 {
    font-size: 1.125rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xs);
}

.phase-step p {
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Benefits Section */
.benefits-section {
    background-color: var(--color-light-gray);
}

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

.benefit-card {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 8px;
}

.benefit-card h3 {
    font-size: 1.25rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.benefit-card p {
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Different Section */
.different-section {
    background-color: var(--color-white);
}

.different-content {
    max-width: 1000px;
    margin: 0 auto;
}

.different-intro {
    text-align: center;
    font-size: 1.125rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-lg);
}

.different-comparison {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-md);
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.comparison-item {
    background-color: var(--color-light-gray);
    padding: var(--spacing-md);
    border-radius: 8px;
}

.comparison-item.highlight {
    background-color: var(--color-accent-light);
    border: 2px solid var(--color-accent);
}

.comparison-item h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
}

.comparison-item p {
    font-size: 0.9375rem;
    line-height: 1.6;
}

.comparison-arrow {
    font-size: 2rem;
    color: var(--color-accent);
    font-weight: 700;
}

.different-conclusion {
    text-align: center;
    font-size: 1rem;
    color: var(--color-gray);
    font-style: italic;
}

/* CTA Section */
.cta-section {
    background-color: var(--color-dark);
    color: var(--color-white);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.cta-content > p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.7;
}

.contact-info {
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg);
    border-radius: 8px;
    max-width: 600px;
    margin: 0 auto;
}

.contact-person h3 {
    font-size: 1.75rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.contact-title {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
}

.contact-detail {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xs);
}

.contact-detail a {
    color: var(--color-white);
    font-weight: 600;
}

.contact-detail a:hover {
    color: var(--color-accent-light);
}

/* Footer */
.footer {
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.footer-brand .logo {
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

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

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

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

/* Responsive Design */
@media (max-width: 968px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .shift-grid,
    .problem-grid,
    .core-problem-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .phase-grid {
        grid-template-columns: 1fr;
    }
    
    .different-comparison {
        grid-template-columns: 1fr;
    }
    
    .comparison-arrow {
        transform: rotate(90deg);
        text-align: center;
    }
    
    .layer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}