/* ==========================================================================
   Hybrid Cognition - Homepage Styles
   Version 3.0 | 2026-01-23
   Design: Editorial warmth, Swiss precision, serif headlines
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
    /* Colors - warmer palette */
    --color-bg: #ffffff;
    --color-bg-alt: #faf9f7;
    --color-bg-warm: #f5f3ef;
    --color-text: #1a1a1a;
    --color-text-secondary: #5c5c5c;
    --color-text-light: #8a8a8a;
    --color-accent: #2d5a4a;
    --color-accent-hover: #1e3d32;
    --color-accent-light: #e8f0ed;
    --color-border: #e5e3df;
    --color-highlight: #2d5a4a;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Libre Baskerville', Georgia, 'Times New Roman', serif;
    --font-size-base: 18px;
    --font-size-sm: 0.889rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 1.875rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3.25rem;
    --line-height: 1.7;
    --line-height-tight: 1.3;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;

    /* Layout */
    --container-max: 1200px;
    --container-narrow: 720px;

    /* Transitions */
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
}

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

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

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3 {
    font-family: var(--font-serif);
    line-height: var(--line-height-tight);
    font-weight: 400;
}

h1 {
    font-size: var(--font-size-3xl);
    letter-spacing: -0.01em;
}

h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-xl);
}

h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

p {
    margin-bottom: var(--space-sm);
}

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

strong {
    font-weight: 600;
}

em, .italic {
    font-style: italic;
}

.lead {
    font-size: var(--font-size-lg);
    color: var(--color-text);
    font-weight: 500;
}

.highlight {
    color: var(--color-text);
    font-weight: 500;
    margin-top: var(--space-md);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

section {
    padding: var(--space-3xl) 0;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-family: var(--font-sans);
    font-size: var(--font-size-sm);
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--color-text);
    text-decoration: none;
}

.logo:hover {
    color: var(--color-text);
}

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

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

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

.nav-cta {
    padding: var(--space-xs) var(--space-md);
    background: var(--color-accent);
    color: var(--color-bg) !important;
    border-radius: 6px;
}

.nav-cta:hover {
    background: var(--color-accent-hover);
    color: var(--color-bg) !important;
}

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
    position: relative;
    padding: calc(var(--space-4xl) + 72px) 0 var(--space-4xl);
    min-height: 85vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(160deg, var(--color-bg) 0%, var(--color-bg-warm) 50%, var(--color-accent-light) 100%);
    opacity: 0.7;
    z-index: -1;
}

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

.hero h1 {
    margin-bottom: var(--space-lg);
    font-style: italic;
}

.hero-sub {
    font-family: var(--font-sans);
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    font-weight: 400;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--color-accent-hover);
    color: var(--color-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(45, 90, 74, 0.25);
}

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-lg);
}

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

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

.problem h2 {
    text-align: left;
}

.problem-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.problem-content .lead {
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

/* --------------------------------------------------------------------------
   Reframe Section
   -------------------------------------------------------------------------- */
.reframe {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

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

.reframe h2 {
    text-align: left;
}

.reframe-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.reframe-content .lead {
    color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Offerings Section
   -------------------------------------------------------------------------- */
.offerings {
    background: var(--color-bg);
    padding: var(--space-4xl) 0;
}

.offerings h2 {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

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

.offering-card {
    background: var(--color-bg);
    padding: var(--space-xl);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    position: relative;
    transition: all var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.offering-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.offering-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.offering-number {
    font-family: var(--font-serif);
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
    font-weight: 400;
}

.offering-card h3 {
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.offering-tagline {
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    font-size: var(--font-size-base);
}

.offering-method {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-sm);
    letter-spacing: 0.02em;
}

.offering-card > p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-sm);
}

.offering-details {
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.offering-format {
    font-size: var(--font-size-sm) !important;
    color: var(--color-text) !important;
    font-weight: 500;
    margin-bottom: var(--space-sm) !important;
}

.offering-fit {
    font-size: var(--font-size-sm) !important;
    color: var(--color-text-light) !important;
    font-style: italic;
    margin-bottom: 0 !important;
}

/* --------------------------------------------------------------------------
   Why Section
   -------------------------------------------------------------------------- */
.why {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.why h2 {
    text-align: center;
}

.why-grid {
    display: grid;
    gap: var(--space-2xl);
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.why-item {
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-slow);
}

.why-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.why-item h3 {
    margin-bottom: var(--space-sm);
    color: var(--color-text);
    font-size: var(--font-size-lg);
}

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

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

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

.who h2 {
    text-align: left;
}

.who-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.who-content .highlight {
    color: var(--color-text);
    font-weight: 500;
}

.linkedin-link {
    display: inline-block;
    margin-top: var(--space-sm);
    font-weight: 500;
    color: var(--color-accent);
}

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

/* --------------------------------------------------------------------------
   CTA Section
   -------------------------------------------------------------------------- */
.cta-section {
    background: var(--color-accent);
    color: var(--color-bg);
    text-align: center;
    padding: var(--space-4xl) 0;
}

.cta-section h2 {
    color: var(--color-bg);
    margin-bottom: var(--space-md);
}

.cta-section > .container > p {
    color: rgba(255, 255, 255, 0.85);
    max-width: 540px;
    margin: 0 auto var(--space-lg);
}

.cta-section .btn-primary {
    background: var(--color-bg);
    color: var(--color-accent);
}

.cta-section .btn-primary:hover {
    background: var(--color-bg);
    color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.cta-alt {
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

.cta-alt a {
    color: var(--color-bg);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.cta-alt a:hover {
    color: var(--color-bg);
    opacity: 0.9;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--space-xl) 0;
    background: var(--color-bg-warm);
    border-top: 1px solid var(--color-border);
}

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

.footer-brand .logo {
    font-size: var(--font-size-sm);
}

.footer-brand p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin: var(--space-xs) 0 0;
}

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

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

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

.copyright {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    text-align: center;
    margin: 0;
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */

/* Tablet */
@media (max-width: 1024px) {
    .offerings-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        max-width: 600px;
        margin: 0 auto;
    }

    .offering-card {
        padding: var(--space-lg);
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --font-size-base: 16px;
        --font-size-3xl: 1.875rem;
        --font-size-2xl: 1.5rem;
        --font-size-xl: 1.25rem;
    }

    .header .container {
        height: 64px;
    }

    .nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }

    .nav-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        padding: calc(var(--space-3xl) + 64px) 0 var(--space-2xl);
        min-height: auto;
    }

    section {
        padding: var(--space-2xl) 0;
    }

    .offerings {
        padding: var(--space-2xl) 0;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-md);
    }

    .footer-brand {
        order: 1;
    }

    .footer-links {
        order: 2;
    }

    h2 {
        margin-bottom: var(--space-lg);
    }
}

/* Small mobile */
@media (max-width: 480px) {
    :root {
        --font-size-3xl: 1.625rem;
        --font-size-2xl: 1.375rem;
    }

    .btn-large {
        width: 100%;
        text-align: center;
    }
}

/* --------------------------------------------------------------------------
   Animation Classes
   -------------------------------------------------------------------------- */
.offering-card,
.why-item {
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.offering-card:nth-child(2) {
    transition-delay: 0.1s;
}

.offering-card:nth-child(3) {
    transition-delay: 0.2s;
}

.why-item:nth-child(2) {
    transition-delay: 0.1s;
}

.why-item:nth-child(3) {
    transition-delay: 0.2s;
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
    .header,
    .mobile-menu-btn,
    .cta-section .btn {
        display: none;
    }

    section {
        padding: var(--space-lg) 0;
    }

    .hero {
        padding-top: var(--space-lg);
        min-height: auto;
    }

    .hero-bg {
        display: none;
    }

    .offering-card,
    .why-item {
        opacity: 1;
        transform: none;
    }
}