/*
 * Adame Quantitative Research
 * Warm neutral, Scandinavian minimalist aesthetic
 */

/* ============================================
   CSS Variables
   ============================================ */
:root {
    /* Colors - Warm neutrals */
    --color-bg: #FAF9F7;
    --color-bg-subtle: #F4F2EF;
    --color-text: #2C2C2C;
    --color-text-secondary: #6B6B6B;
    --color-text-tertiary: #9A9A9A;
    --color-accent: #B85C38;
    --color-border: #E8E6E3;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 17px;
    --font-size-small: 15px;
    --font-size-large: 20px;
    --font-size-h1: 42px;
    --font-size-h2: 24px;
    --line-height: 1.65;
    --letter-spacing: -0.01em;

    /* Spacing */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 48px;
    --space-xl: 80px;
    --space-xxl: 120px;

    /* Layout */
    --max-width: 820px;
    --nav-height: 72px;
}

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

html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-weight: 400;
    line-height: var(--line-height);
    letter-spacing: var(--letter-spacing);
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   Typography
   ============================================ */
h1 {
    font-size: var(--font-size-h1);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.025em;
    color: var(--color-text);
}

h2 {
    font-size: var(--font-size-h2);
    font-weight: 500;
    line-height: 1.3;
    letter-spacing: -0.015em;
    color: var(--color-text);
}

p {
    color: var(--color-text-secondary);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: opacity 0.15s ease;
}

a:hover {
    opacity: 0.75;
}

ul {
    list-style: none;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.nav-logo {
    font-size: var(--font-size-small);
    font-weight: 500;
    color: var(--color-text);
    letter-spacing: 0;
}

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

.nav-links a {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-text);
    opacity: 1;
}

/* ============================================
   Main Content
   ============================================ */
.main {
    flex: 1;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
}

/* ============================================
   Hero Section (Home)
   ============================================ */
.hero {
    margin-bottom: var(--space-xl);
}

.hero h1 {
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-size: var(--font-size-large);
    max-width: 540px;
    margin-bottom: var(--space-md);
}

.hero-cta {
    display: inline-block;
    font-size: var(--font-size-large);
    font-weight: 500;
    color: var(--color-accent);
}

/* ============================================
   Demo Section (Home)
   ============================================ */
.demo {
    margin-bottom: var(--space-xl);
}

.demo-video {
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.demo-video video {
    display: block;
    width: 100%;
    height: auto;
}

/* ============================================
   Intro Section (Home)
   ============================================ */
.intro {
    margin-bottom: var(--space-xl);
}

.intro-content p {
    margin-bottom: var(--space-md);
}

.intro-content p:last-child {
    margin-bottom: 0;
    color: var(--color-text);
    font-weight: 500;
}

/* ============================================
   About Section (Home)
   ============================================ */
.about {
    margin-bottom: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.about h2 {
    margin-bottom: var(--space-md);
}

.about p {
    margin-bottom: var(--space-md);
}

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

/* ============================================
   Page Headers
   ============================================ */
.page-header {
    margin-bottom: var(--space-xl);
}

.page-header h1 {
    margin-bottom: var(--space-xs);
}

.page-subtitle {
    font-size: var(--font-size-large);
    color: var(--color-text-tertiary);
}

/* ============================================
   Services Page
   ============================================ */
.services-list {
    margin-bottom: var(--space-xl);
}

.service {
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.service:first-child {
    padding-top: 0;
}

.service h2 {
    margin-bottom: var(--space-sm);
}

.service > p {
    margin-bottom: var(--space-md);
}

.service-details {
    padding-left: var(--space-md);
}

.service-details li {
    position: relative;
    padding-left: var(--space-sm);
    margin-bottom: var(--space-xs);
    color: var(--color-text-secondary);
    font-size: var(--font-size-small);
}

.service-details li::before {
    content: "–";
    position: absolute;
    left: 0;
    color: var(--color-text-tertiary);
}

.pricing-note {
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background-color: var(--color-bg-subtle);
    border-radius: 4px;
}

.pricing-note p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin: 0;
}

/* ============================================
   Work Page
   ============================================ */
.work-list {
    margin-bottom: var(--space-xl);
}

.work-item {
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.work-item:first-child {
    padding-top: 0;
}

.work-content h2 {
    margin-bottom: var(--space-sm);
}

.work-content > p {
    margin-bottom: var(--space-sm);
}

.work-meta {
    font-size: var(--font-size-small);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-md);
}

.work-meta a {
    color: var(--color-text-secondary);
}

.work-meta a:hover {
    color: var(--color-accent);
    opacity: 1;
}

.work-link {
    font-weight: 500;
}

.work-video {
    margin-top: var(--space-lg);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.work-video video {
    display: block;
    width: 100%;
    height: auto;
}

.work-note {
    padding: var(--space-md);
    background-color: var(--color-bg-subtle);
    border-radius: 4px;
}

.work-note p {
    font-size: var(--font-size-small);
    margin: 0;
}

/* ============================================
   Publications Section (Work)
   ============================================ */
.publications {
    margin-bottom: var(--space-xl);
}

.publications h2 {
    margin-bottom: var(--space-md);
}

.publication-list {
    list-style: none;
}

.publication {
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
}

.publication:first-child {
    padding-top: 0;
}

.publication:last-child {
    border-bottom: none;
}

.publication-link {
    display: block;
    color: inherit;
    transition: opacity 0.15s ease;
}

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

.publication-link:hover .publication-title {
    color: var(--color-accent);
}

.publication-title {
    color: var(--color-text);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.publication-venue {
    font-size: var(--font-size-small);
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.publication-authors {
    font-size: var(--font-size-small);
    color: var(--color-text-tertiary);
}

/* ============================================
   Contact Page
   ============================================ */
.contact-content {
    max-width: 480px;
}

.contact-intro {
    margin-bottom: var(--space-lg);
}

.contact-intro p {
    font-size: var(--font-size-large);
}

.contact-methods {
    margin-bottom: var(--space-lg);
}

.contact-method {
    margin-bottom: var(--space-md);
}

.contact-method h2 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-xs);
}

.contact-method a,
.contact-method p {
    font-size: var(--font-size-large);
}

.contact-note {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.contact-note p {
    font-size: var(--font-size-small);
    color: var(--color-text-tertiary);
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
    padding-top: var(--space-lg);
}

.cta-link {
    font-size: var(--font-size-large);
    font-weight: 500;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--space-lg);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer p {
    font-size: var(--font-size-small);
    color: var(--color-text-tertiary);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    :root {
        --font-size-h1: 32px;
        --font-size-h2: 20px;
        --font-size-large: 18px;
        --space-xl: 56px;
    }

    .nav {
        padding: 0 var(--space-md);
    }

    .nav-logo {
        font-size: 14px;
    }

    .nav-links {
        gap: var(--space-sm);
    }

    .nav-links a {
        font-size: 14px;
    }

    .main {
        padding: var(--space-lg) var(--space-md);
    }
}

@media (max-width: 480px) {
    .nav {
        flex-direction: column;
        height: auto;
        padding: var(--space-sm) var(--space-md);
        gap: var(--space-sm);
    }

    .hero h1 br {
        display: none;
    }
}