/* OKBoomer.ai - Accessible, Senior-Friendly Styles */

/* CSS Custom Properties */
:root {
    /* Colors - High contrast, warm and friendly */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-secondary: #0f766e;
    --color-secondary-light: #ccfbf1;

    --color-text: #1f2937;
    --color-text-light: #4b5563;
    --color-text-lighter: #6b7280;

    --color-background: #ffffff;
    --color-background-alt: #f9fafb;
    --color-background-warm: #fffbeb;

    --color-border: #e5e7eb;
    --color-border-dark: #d1d5db;

    --color-success: #059669;
    --color-warning: #d97706;
    --color-error: #dc2626;

    /* Typography - Larger sizes for readability */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-serif: 'Merriweather', Georgia, serif;

    --text-base: 1.125rem;      /* 18px */
    --text-lg: 1.25rem;         /* 20px */
    --text-xl: 1.5rem;          /* 24px */
    --text-2xl: 1.875rem;       /* 30px */
    --text-3xl: 2.25rem;        /* 36px */
    --text-4xl: 3rem;           /* 48px */
    --text-sm: 1rem;            /* 16px */

    --line-height: 1.7;
    --line-height-tight: 1.3;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Layout */
    --container-max: 1200px;
    --container-narrow: 800px;

    /* Borders & Shadows */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

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

* {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 100%;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

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

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

/* Focus Styles - Extra visible for accessibility */
:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: white;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    z-index: 1000;
    font-weight: 600;
    text-decoration: none;
}

.skip-link:focus {
    top: var(--space-md);
}

/* Visually Hidden */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: var(--line-height-tight);
    color: var(--color-text);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

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

a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    min-height: 52px;
}

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

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

/* Header & Navigation */
.header {
    position: sticky;
    top: 0;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    min-height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--color-text);
}

.logo-icon {
    font-size: var(--text-2xl);
}

.logo-text {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    font-weight: 700;
}

.logo-ai {
    color: var(--color-primary);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-sm);
    cursor: pointer;
}

.hamburger {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--color-text);
    position: relative;
    border-radius: 2px;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 28px;
    height: 3px;
    background-color: var(--color-text);
    border-radius: 2px;
    left: 0;
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    list-style: none;
}

.nav-link {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    padding: var(--space-xs) 0;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.nav-cta {
    background-color: var(--color-primary);
    color: white !important;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    border-bottom: none !important;
}

.nav-cta:hover {
    background-color: var(--color-primary-dark);
}

/* Hero Section */
.hero {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-background) 50%, var(--color-secondary-light) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-title {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-illustration {
    position: relative;
    width: 300px;
    height: 300px;
}

.illustration-circle {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 50%;
    opacity: 0.1;
    animation: pulse 3s ease-in-out infinite;
}

.illustration-robot {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 120px;
}

.illustration-sparkles {
    position: absolute;
    top: 20%;
    right: 15%;
    font-size: 40px;
    animation: float 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Trust Banner */
.trust-banner {
    background-color: var(--color-text);
    color: white;
    padding: var(--space-lg) 0;
    text-align: center;
}

.trust-text {
    font-size: var(--text-lg);
    margin: 0;
}

/* Section Styles */
.section-header {
    text-align: center;
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-3xl);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-light);
    margin-bottom: 0;
}

/* Topics Section */
.topics {
    padding: var(--space-4xl) 0;
}

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

.topic-card {
    background-color: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    cursor: pointer;
}

.topic-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.topic-icon {
    font-size: 48px;
    margin-bottom: var(--space-md);
}

.topic-title {
    font-family: var(--font-sans);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.topic-description {
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
}

.topic-level {
    display: inline-block;
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
}

.topics-cta {
    text-align: center;
    margin-top: var(--space-3xl);
}

/* How It Works Section */
.how-it-works {
    padding: var(--space-4xl) 0;
    background-color: var(--color-background-alt);
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

.step {
    text-align: center;
    padding: var(--space-lg);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background-color: var(--color-primary);
    color: white;
    font-size: var(--text-xl);
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: var(--space-lg);
}

.step-title {
    font-family: var(--font-sans);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.step-description {
    color: var(--color-text-light);
    margin: 0;
}

/* Testimonials Section */
.testimonials {
    padding: var(--space-4xl) 0;
}

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

.testimonial {
    background-color: var(--color-background-warm);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: none;
}

.testimonial-text {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    font-style: italic;
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    font-style: normal;
}

.author-name {
    font-weight: 600;
    color: var(--color-text);
}

.author-location {
    color: var(--color-text-lighter);
    font-size: var(--text-sm);
}

/* Resources Section */
.resources {
    padding: var(--space-4xl) 0;
    background-color: var(--color-background-alt);
}

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

.resource-card {
    background-color: var(--color-background);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.resource-icon {
    font-size: 48px;
    margin-bottom: var(--space-md);
}

.resource-title {
    font-family: var(--font-sans);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.resource-description {
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
}

.resource-link {
    font-weight: 600;
}

/* About Section */
.about {
    padding: var(--space-4xl) 0;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.about-text p {
    font-size: var(--text-lg);
    margin-bottom: var(--space-lg);
}

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

.about-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.value {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-lg);
    background-color: var(--color-background-alt);
    border-radius: var(--radius-md);
}

.value-icon {
    font-size: 32px;
    margin-bottom: var(--space-sm);
}

.value-text {
    font-weight: 600;
    font-size: var(--text-sm);
}

/* Newsletter Section */
.newsletter {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
}

.newsletter-content {
    max-width: var(--container-narrow);
    margin: 0 auto;
    text-align: center;
}

.newsletter-title {
    color: white;
    margin-bottom: var(--space-md);
}

.newsletter-subtitle {
    font-size: var(--text-lg);
    opacity: 0.9;
    margin-bottom: var(--space-xl);
}

.newsletter-form {
    max-width: 500px;
    margin: 0 auto;
}

.form-group {
    display: flex;
    gap: var(--space-sm);
}

.form-input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    font-size: var(--text-base);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-text);
}

.newsletter .btn-primary {
    background-color: var(--color-text);
    border-color: var(--color-text);
    white-space: nowrap;
}

.newsletter .btn-primary:hover {
    background-color: var(--color-text-light);
    border-color: var(--color-text-light);
}

.form-note {
    margin-top: var(--space-md);
    font-size: var(--text-sm);
    opacity: 0.9;
}

/* FAQ Section */
.faq {
    padding: var(--space-4xl) 0;
}

.faq-list {
    max-width: var(--container-narrow);
    margin: 0 auto;
}

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

.faq-question {
    font-size: var(--text-lg);
    font-weight: 600;
    cursor: pointer;
    padding: var(--space-sm) 0;
    list-style: none;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::before {
    content: '+';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    margin-right: var(--space-md);
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 50%;
    font-weight: 700;
    transition: transform var(--transition-fast);
}

.faq-item[open] .faq-question::before {
    content: '−';
    transform: rotate(180deg);
}

.faq-answer {
    padding: var(--space-md) 0 var(--space-sm);
    padding-left: calc(28px + var(--space-md));
    color: var(--color-text-light);
    font-size: var(--text-base);
}

/* Footer */
.footer {
    background-color: var(--color-text);
    color: white;
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-3xl);
    padding-bottom: var(--space-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-tagline {
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

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

.footer-nav-title {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
    color: rgba(255, 255, 255, 0.5);
}

.footer-nav-list {
    list-style: none;
}

.footer-nav-list li {
    margin-bottom: var(--space-sm);
}

.footer-nav-list a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-nav-list a:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--space-xl);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--text-sm);
}

.footer-bottom p {
    margin-bottom: var(--space-xs);
}

/* Responsive Design */
@media (max-width: 1024px) {
    :root {
        --text-4xl: 2.5rem;
        --text-3xl: 2rem;
    }

    .topics-grid,
    .testimonials-grid,
    .resources-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-values {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --text-4xl: 2rem;
        --text-3xl: 1.75rem;
        --text-2xl: 1.5rem;
    }

    .nav-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-background);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.is-active {
        display: flex;
    }

    .nav-cta {
        width: 100%;
        text-align: center;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-illustration {
        width: 200px;
        height: 200px;
    }

    .illustration-robot {
        font-size: 80px;
    }

    .topics-grid,
    .testimonials-grid,
    .resources-grid,
    .steps {
        grid-template-columns: 1fr;
    }

    .about-values {
        grid-template-columns: repeat(2, 1fr);
    }

    .form-group {
        flex-direction: column;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-nav {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
}

@media (max-width: 480px) {
    :root {
        --space-4xl: 4rem;
        --space-3xl: 3rem;
    }

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

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .about-values {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .newsletter,
    .hero-image,
    .nav-toggle {
        display: none;
    }

    body {
        font-size: 12pt;
        color: black;
        background: white;
    }

    a {
        color: black;
        text-decoration: underline;
    }

    .hero,
    .how-it-works,
    .resources {
        background: white !important;
    }
}