/* =============================================================================
   Sales Terminal Landing Page - Braintrust-inspired Light Theme
   Clean, minimal, lots of whitespace
   ============================================================================= */

/* -----------------------------------------------------------------------------
   CSS Custom Properties - Light Theme
   ----------------------------------------------------------------------------- */
:root {
    /* NOTE: Clean color scheme - white, black, dark grey with neon blue accents */
    --color-bg: #ffffff;
    --color-bg-alt: #f1f5f9;           /* Slate 100 - slightly darker */
    --color-bg-accent: #0f172a;        /* Slate 900 - dark sections */
    
    /* Text colors - darker greys */
    --color-text: #0f172a;             /* Slate 900 */
    --color-text-secondary: #334155;   /* Slate 700 - darker */
    --color-text-muted: #64748b;       /* Slate 500 - darker */
    --color-text-inverse: #ffffff;
    
    /* Accent colors - neon blue like the app */
    --color-primary: #00d4ff;          /* Neon blue from app */
    --color-primary-hover: #00b8e6;
    --color-badge: #0f172a;            /* Dark badge */
    --color-badge-text: #00d4ff;       /* Neon blue text on dark badge */
    
    /* Borders */
    --color-border: #e5e5e5;
    --color-border-dark: #d4d4d4;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing - generous like Braintrust */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    
    /* Container */
    --container-max: 1200px;
    --container-narrow: 800px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

/* -----------------------------------------------------------------------------
   Container
   ----------------------------------------------------------------------------- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* -----------------------------------------------------------------------------
   Buttons - Clean, minimal
   ----------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-bg-accent);
    color: var(--color-text-inverse);
}

.btn-primary:hover {
    background: #1e293b;  /* Slate 800 */
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border-dark);
}

.btn-outline:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-text);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text);
}

.btn-ghost:hover {
    background: var(--color-bg-alt);
}

.btn-lg {
    padding: 1rem 1.75rem;
    font-size: 1rem;
}

/* -----------------------------------------------------------------------------
   Navigation - Clean, minimal like Braintrust
   ----------------------------------------------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: var(--color-bg);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-links a {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

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

/* Mobile menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-fast);
}

/* -----------------------------------------------------------------------------
   Hero Section - Clean, centered like Braintrust
   ----------------------------------------------------------------------------- */
.hero {
    padding: calc(var(--space-5xl) + 60px) 0 var(--space-5xl);
    text-align: center;
}

.hero .container {
    max-width: var(--container-narrow);
}

/* NOTE: Badge like Braintrust's lime green announcement */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-badge);
    color: var(--color-badge-text);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-2xl);
    transition: all var(--transition-base);
}

.hero-badge:hover {
    transform: translateY(-1px);
}

.badge-arrow {
    font-weight: 400;
}

/* NOTE: Large, bold headline like Braintrust */
.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    font-weight: 400;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* -----------------------------------------------------------------------------
   Why Section - Problem statement like Braintrust
   ----------------------------------------------------------------------------- */
.why-section {
    padding: var(--space-5xl) 0;
    background: var(--color-bg-accent);
    color: var(--color-text-inverse);
}

.section-eyebrow {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
    opacity: 0.8;
}

.section-title-large {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xl);
}

.section-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-primary);
    color: var(--color-bg-accent);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.section-cta:hover {
    transform: translateY(-2px);
}

/* -----------------------------------------------------------------------------
   Problems Section - Question cards like Braintrust
   ----------------------------------------------------------------------------- */
.problems-section {
    padding: var(--space-5xl) 0;
    background: var(--color-bg-accent);
    color: var(--color-text-inverse);
}

.problems-section .container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.problem-card {
    padding: var(--space-lg) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.problem-title {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-md);
}

.problem-desc {
    font-size: 1rem;
    line-height: 1.6;
    opacity: 0.9;
}

/* -----------------------------------------------------------------------------
   Features Section - Grid with icons like Braintrust
   ----------------------------------------------------------------------------- */
.features-section {
    padding: var(--space-5xl) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3xl) var(--space-xl);
}

.feature-item {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.feature-icon {
    color: var(--color-text);
    margin-bottom: var(--space-lg);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.feature-desc {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* -----------------------------------------------------------------------------
   Tech Section - Clean cards
   ----------------------------------------------------------------------------- */
.tech-section {
    padding: var(--space-5xl) 0;
    background: var(--color-bg-alt);
}

.tech-section .section-eyebrow {
    color: var(--color-text-secondary);
}

.tech-section .section-title-large {
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.section-desc {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-3xl);
}

.tech-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.tech-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-xl);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    min-width: 160px;
    transition: all var(--transition-base);
}

.tech-card:hover {
    border-color: var(--color-border-dark);
    transform: translateY(-2px);
}

.tech-logo {
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.tech-name {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.tech-detail {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   CTA Section - Clean, centered
   ----------------------------------------------------------------------------- */
.cta-section {
    padding: var(--space-5xl) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.cta-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

.cta-desc {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    margin-bottom: var(--space-xl);
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   Footer - Minimal like Braintrust
   ----------------------------------------------------------------------------- */
.footer {
    padding: var(--space-4xl) 0 var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-size: 1.125rem;
    font-weight: 700;
    display: block;
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.footer-links {
    display: flex;
    gap: var(--space-4xl);
}

.footer-col h5 {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.footer-col a {
    display: block;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    padding: var(--space-xs) 0;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--color-text);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   Responsive - Tablet
   ----------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .problems-section .container {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* -----------------------------------------------------------------------------
   Responsive - Mobile
   ----------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .nav-links,
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-lg);
        gap: var(--space-md);
    }
    
    .hero {
        padding: calc(var(--space-4xl) + 60px) 0 var(--space-4xl);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-grid {
        gap: var(--space-md);
    }
    
    .tech-card {
        min-width: 140px;
        padding: var(--space-lg);
    }
    
    .cta-features {
        flex-direction: column;
        align-items: center;
        gap: var(--space-sm);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-2xl);
    }
    
    .footer-links {
        gap: var(--space-2xl);
    }
}

/* -----------------------------------------------------------------------------
   Responsive - Small Mobile
   ----------------------------------------------------------------------------- */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title-large {
        font-size: 1.5rem;
    }
    
    .problem-title {
        font-size: 1.125rem;
    }
    
    .feature-title {
        font-size: 1.125rem;
    }
    
    .btn-lg {
        padding: 0.875rem 1.5rem;
        font-size: 0.9375rem;
    }
}

/* =============================================================================
   Mobile App Page Styles (keeping for compatibility)
   ============================================================================= */
.mobile-app-page {
    padding-top: 120px;
    min-height: 100vh;
}

.mobile-app-page .section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.mobile-steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    max-width: 320px;
    margin: 0 auto var(--space-xl);
}

.mobile-step {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.step-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.step-number {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: var(--color-text-inverse);
    font-weight: 700;
    font-size: 0.875rem;
    border-radius: 50%;
}

.step-content h4 {
    font-size: 0.9375rem;
    font-weight: 600;
}

.step-content p {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.step-image img {
    width: 100%;
    display: block;
}

.mobile-note {
    text-align: center;
    padding: var(--space-md);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    max-width: 320px;
    margin: 0 auto;
}

.mobile-note p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.back-link {
    text-align: center;
    margin-top: var(--space-xl);
}