/* 
  LAmix Master Landing Page 
  Design System: Enterprise Minimal (Light Mode)
*/

:root {
    --bg-page: #ffffff;
    --text-primary: #1f1f1f;
    --text-secondary: #5f6368;
    --border-color: #dadce0;
    
    --btn-primary-bg: #111111;
    --btn-primary-text: #ffffff;
    --btn-primary-hover: #2b2b2b;
    
    --btn-secondary-bg: #f8f9fa;
    --btn-secondary-text: #1f1f1f;
    --btn-secondary-border: #dadce0;
    --btn-secondary-hover: #f1f3f4;
    
    --font-ui: 'Onest', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
    background-color: var(--bg-page);
    color: var(--text-primary);
    font-family: var(--font-ui);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Typography */
h1 {
    font-size: 2.75rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h2 {
    font-size: 1.375rem;
    font-weight: 500;
}

h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Buttons (Pill Shapes) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    border: none;
}

.btn-primary {
    background-color: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    padding: 0.75rem 1.5rem;
}

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

.btn-secondary {
    background-color: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--btn-secondary-border);
}

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

.btn-sm {
    padding: 0.5rem 1.25rem;
}

.btn-full {
    width: 100%;
}

/* Top Navigation */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}

.nav-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

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

.nav-chevron {
    font-size: 0.6rem;
    margin-left: 4px;
    vertical-align: middle;
}

/* Page Container */
.page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* Hero Section */
.hero-section {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 3rem;
}

/* Platform Tabs */
.platform-tabs {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    background: var(--btn-secondary-hover);
}

.tab-btn.active {
    background: #ffffff;
    color: var(--text-primary);
    border-color: #1a73e8; /* Subtle blue border for active */
    box-shadow: 0 0 0 1px #1a73e8;
}

.divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin-bottom: 3rem;
}

/* OS Grid */
.os-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    position: relative;
}

.os-column {
    padding: 0 3rem;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Vertical Dividers */
.os-column:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: -2rem; /* Extend past the requirements */
    width: 1px;
    background-color: var(--border-color);
}

.os-column:first-child {
    padding-left: 0;
}

.os-column:last-child {
    padding-right: 0;
}

.os-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.os-icon {
    font-size: 1.25rem;
    color: var(--text-primary);
}

.os-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 4rem;
}

.os-requirements {
    margin-top: auto;
}

/* Responsive */
@media (max-width: 900px) {
    .os-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .os-column {
        padding: 0 !important;
    }
    
    .os-column::after {
        display: none;
    }
    
    .hero-section {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }
    
    .nav-links {
        display: none;
    }
}