/* ============================================
   CSS Variables for Theming
   ============================================ */
:root {
    /* Light mode colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: rgba(0, 0, 0, 0.1);
    
    /* Accent colors */
    --accent-blue: #2563eb;
    --accent-blue-light: #dbeafe;
    --accent-blue-dark: #1e40af;
    --accent-green: #059669;
    --accent-green-light: #d1fae5;
    --accent-green-dark: #047857;
    --accent-purple: #7c3aed;
    --accent-purple-light: #e9d5ff;
    --accent-purple-dark: #6d28d9;
    --accent-orange: #ea580c;
    --accent-orange-light: #fed7aa;
    --accent-orange-dark: #c2410c;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    
    /* Transitions */
    --transition: all 0.2s ease-in-out;
}

/* Dark mode colors */
.dark-mode {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --border-color: #374151;
    --shadow: rgba(0, 0, 0, 0.3);
    
    --accent-blue-light: #1e3a8a;
    --accent-blue-dark: #60a5fa;
    --accent-green-light: #065f46;
    --accent-green-dark: #34d399;
    --accent-purple-light: #5b21b6;
    --accent-purple-dark: #a78bfa;
    --accent-orange-light: #9a3412;
    --accent-orange-dark: #fb923c;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition), color var(--transition);
}

/* ============================================
   Skip Link (Accessibility)
   ============================================ */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent-blue);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 100;
    border-radius: 4px;
}

.skip-link:focus {
    top: 0;
    position: fixed;
    margin: 16px;
}

/* ============================================
   Header & Navigation
   ============================================ */
.header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.9);
    transition: background-color var(--transition), border-color var(--transition);
}

.dark-mode .header {
    background-color: rgba(17, 24, 39, 0.9);
}

.nav {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 2rem;
    height: 2rem;
    color: var(--accent-blue);
}

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

.dark-mode-toggle {
    padding: 0.5rem;
    border-radius: 0.5rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color var(--transition), color var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dark-mode-toggle:hover {
    background-color: var(--bg-secondary);
}

.dark-mode-toggle:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.icon-moon,
.icon-sun {
    width: 1.5rem;
    height: 1.5rem;
}

.icon-moon {
    display: none;
}

.dark-mode .icon-moon {
    display: block;
}

.dark-mode .icon-sun {
    display: none;
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

@media (min-width: 640px) {
    .container {
        padding: 0 2rem;
    }
}

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
    padding: 4rem 1.5rem;
    text-align: center;
    position: relative;
    /* Background image - colorful yarn spools */
    background-image: url('yarndyed.jpeg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: scroll;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Fixed background on larger screens */
@media (min-width: 768px) {
    .hero-section {
        background-attachment: fixed;
    }
}

/* Overlay for text readability */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.dark-mode .hero-section::before {
    background: rgba(0, 0, 0, 0.7);
}

@media (min-width: 640px) {
    .hero-section {
        padding: 6rem 2rem;
        min-height: 80vh;
    }
}

.hero-container {
    max-width: 56rem;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #ffffff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

@media (min-width: 640px) {
    .hero-title {
        font-size: 3rem;
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 3.75rem;
    }
}

.hero-date {
    font-size: 1.25rem;
    color: #ffffff;
    margin-bottom: 1rem;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

@media (min-width: 640px) {
    .hero-date {
        font-size: 1.5rem;
    }
}

.hero-description {
    font-size: 1.125rem;
    color: #ffffff;
    max-width: 42rem;
    margin: 0 auto;
    line-height: 1.75;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

@media (min-width: 640px) {
    .hero-description {
        font-size: 1.25rem;
    }
}

/* ============================================
   Section Titles
   ============================================ */
.section-title {
    font-size: 1.875rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

@media (min-width: 640px) {
    .section-title {
        font-size: 2.25rem;
    }
}

/* ============================================
   Thank You Section
   ============================================ */
.thank-you-section {
    background-color: var(--bg-secondary);
    padding: 4rem 0;
}

@media (min-width: 640px) {
    .thank-you-section {
        padding: 5rem 0;
    }
}

.cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 72rem;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

.card {
    background-color: var(--bg-primary);
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px var(--shadow);
    padding: 2rem;
    transition: box-shadow var(--transition);
}

@media (min-width: 640px) {
    .card {
        padding: 2.5rem;
    }
}

.card:hover {
    box-shadow: 0 10px 15px var(--shadow);
}

.card:focus-within {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.card-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.icon-container {
    width: 3rem;
    height: 3rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
}

.icon-blue {
    background-color: var(--accent-blue-light);
    color: var(--accent-blue);
}

.dark-mode .icon-blue {
    background-color: var(--accent-blue-light);
    color: var(--accent-blue-dark);
}

.icon-green {
    background-color: var(--accent-green-light);
    color: var(--accent-green);
}

.dark-mode .icon-green {
    background-color: var(--accent-green-light);
    color: var(--accent-green-dark);
}

.icon-purple {
    background-color: var(--accent-purple-light);
    color: var(--accent-purple);
}

.dark-mode .icon-purple {
    background-color: var(--accent-purple-light);
    color: var(--accent-purple-dark);
}

.icon-orange {
    background-color: var(--accent-orange-light);
    color: var(--accent-orange);
}

.dark-mode .icon-orange {
    background-color: var(--accent-orange-light);
    color: var(--accent-orange-dark);
}

.icon {
    width: 1.5rem;
    height: 1.5rem;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-text {
    color: var(--text-secondary);
    line-height: 1.75;
}

/* ============================================
   Timeline Section
   ============================================ */
.timeline-section {
    padding: 4rem 0;
}

@media (min-width: 640px) {
    .timeline-section {
        padding: 5rem 0;
    }
}

.timeline-container {
    max-width: 48rem;
    margin: 0 auto;
}

.timeline-wrapper {
    position: relative;
}

.timeline-line {
    position: absolute;
    left: 1rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
}

.dark-mode .timeline-line {
    background-color: var(--bg-tertiary);
}

.timeline-items {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.timeline-item {
    position: relative;
    display: flex;
    align-items: flex-start;
}

.timeline-dot {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    background-color: var(--accent-blue);
    border-radius: 50%;
    border: 4px solid var(--bg-primary);
    position: absolute;
    left: 0;
    top: 0.25rem;
}

.dark-mode .timeline-dot {
    border-color: var(--bg-primary);
}

.timeline-content {
    margin-left: 3rem;
}

.timeline-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-date {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.timeline-text {
    color: var(--text-secondary);
}

/* ============================================
   FAQ Section
   ============================================ */
.faq-section {
    background-color: var(--bg-secondary);
    padding: 4rem 0;
}

@media (min-width: 640px) {
    .faq-section {
        padding: 5rem 0;
    }
}

.faq-container {
    max-width: 48rem;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background-color: var(--bg-primary);
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px var(--shadow);
    overflow: hidden;
}

.faq-button {
    width: 100%;
    padding: 1rem 1.5rem;
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: background-color var(--transition);
    color: var(--text-primary);
    font-family: inherit;
}

.faq-button:hover {
    background-color: var(--bg-secondary);
}

.faq-button:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: -2px;
}

.faq-question {
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.faq-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--text-secondary);
    transition: transform var(--transition);
    flex-shrink: 0;
    margin-left: 1rem;
}

.faq-button[aria-expanded="true"] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 1.5rem 1rem 1.5rem;
    color: var(--text-secondary);
}

.faq-answer.open {
    display: block;
}

.faq-text {
    padding-top: 0.5rem;
}

.link {
    color: var(--accent-blue);
    text-decoration: none;
}

.link:hover {
    text-decoration: underline;
}

.dark-mode .link {
    color: var(--accent-blue-dark);
}

/* ============================================
   Contact Section
   ============================================ */
.contact-section {
    padding: 4rem 0;
}

@media (min-width: 640px) {
    .contact-section {
        padding: 5rem 0;
    }
}

.contact-wrapper {
    max-width: 42rem;
    margin: 0 auto;
    text-align: center;
}

.contact-box {
    background-color: var(--bg-secondary);
    border-radius: 0.5rem;
    padding: 2rem;
}

@media (min-width: 640px) {
    .contact-box {
        padding: 2.5rem;
    }
}

.contact-intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    text-align: center;
}

.contact-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.contact-link {
    color: var(--accent-blue);
    text-decoration: none;
    font-size: 1.125rem;
}

.contact-link:hover {
    text-decoration: underline;
}

.dark-mode .contact-link {
    color: var(--accent-blue-dark);
}

.contact-address {
    color: var(--text-secondary);
    font-style: normal;
    line-height: 1.75;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: #111827;
    color: #d1d5db;
    padding: 2rem 0;
}

.dark-mode .footer {
    background-color: #000000;
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.footer-text {
    text-align: center;
    font-size: 0.875rem;
}

@media (min-width: 768px) {
    .footer-text {
        text-align: left;
    }
}

.footer-note {
    margin-top: 0.5rem;
    color: #9ca3af;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.social-link {
    color: #9ca3af;
    transition: color var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-link:hover {
    color: white;
}

.social-link:focus {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
    border-radius: 4px;
}

.social-icon {
    width: 1.25rem;
    height: 1.25rem;
}

/* ============================================
   Accessibility Enhancements
   ============================================ */
*:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
    }
    
    .dark-mode {
        --border-color: #ffffff;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}