/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #ffda08;
    --color-primary-dark: #e6c407;
    --color-secondary: #ff6b6b;
    --color-secondary-dark: #e65a5a;
    --color-background: #ffffff;
    --color-background-dark: #1a1a1a;
    --color-text: #333333;
    --color-text-dark: #ffffff;
    --color-text-light: #666666;
    --color-text-light-dark: #cccccc;
    --color-border: #e0e0e0;
    --color-border-dark: #333333;
    --color-overlay: rgba(0, 0, 0, 0.5);
    --color-overlay-dark: rgba(0, 0, 0, 0.7);
    
    /* Typography */
    --font-family: 'Inter', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 3rem;
    --line-height-base: 1.5;
    --line-height-tight: 1.25;
    --line-height-relaxed: 1.75;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Container */
    --container-width: 1200px;
    --container-padding: 1rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Breakpoints */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --color-background: var(--color-background-dark);
        --color-text: var(--color-text-dark);
        --color-text-light: var(--color-text-light-dark);
        --color-border: var(--color-border-dark);
    }
}

/* Reset & Base Styles */
*, *::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-family);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-text);
    padding: var(--spacing-md);
    z-index: 100;
    transition: top var(--transition-base);
}

.skip-link:focus {
    top: 0;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    z-index: 90;
    transition: box-shadow var(--transition-base);
}

.header.scrolled {
    box-shadow: 0 2px 4px var(--color-overlay);
}

.header__content {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) 0;
}

.logo-link {
    display: block;
}

.logo {
    width: 150px;
    height: auto;
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: scale(1.05);
}

/* Navigation */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--spacing-sm);
    cursor: pointer;
}

.nav-toggle__icon {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    position: relative;
    transition: background-color var(--transition-base);
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: var(--color-text);
    transition: transform var(--transition-base);
}

.nav-toggle__icon::before {
    transform: translateY(-8px);
}

.nav-toggle__icon::after {
    transform: translateY(8px);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon {
    background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before {
    transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after {
    transform: rotate(-45deg);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-overlay);
}

/* Header Actions */
.header__actions {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.search-form {
    display: flex;
    align-items: center;
    background-color: var(--color-overlay);
    border-radius: var(--radius-full);
    padding: var(--spacing-sm) var(--spacing-md);
}

.search-input {
    background: none;
    border: none;
    color: var(--color-text);
    font-size: var(--font-size-sm);
    width: 200px;
    padding: var(--spacing-sm);
}

.search-input:focus {
    outline: none;
}

.search-button {
    background: none;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    padding: var(--spacing-sm);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-full);
    transition: background-color var(--transition-base);
}

.theme-toggle:hover {
    background-color: var(--color-overlay);
}

/* Hero Section */
.hero {
    position: relative;
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-overlay);
    color: var(--color-text-dark);
    text-align: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    z-index: -1;
}

.hero__content {
    max-width: 800px;
    margin: 0 auto;
}

.hero__title {
    font-size: var(--font-size-4xl);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-lg);
}

.hero__text {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xl);
}

.hero__cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Featured Section */
.featured {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: var(--font-size-3xl);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.featured__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

/* Cards */
.card {
    background-color: var(--color-background);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 6px var(--color-overlay);
    transition: transform var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
}

.card__image {
    position: relative;
    padding-top: 60%;
}

.card__image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card__content {
    padding: var(--spacing-lg);
}

.card__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.card__text {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

/* About Section */
.about {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-overlay);
}

.about__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.about__text {
    color: var(--color-text-dark);
}

.about__list {
    list-style: none;
    margin-top: var(--spacing-lg);
}

.about__list li {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-lg);
    position: relative;
}

.about__list li::before {
    content: '•';
    color: var(--color-primary);
    position: absolute;
    left: 0;
}

.about__image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
}

/* Newsletter Section */
.newsletter {
    padding: var(--spacing-3xl) 0;
    text-align: center;
    background-color: var(--color-overlay);
    color: var(--color-text-dark);
}

.newsletter__content {
    max-width: 600px;
    margin: 0 auto;
}

.newsletter__form {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.form-group {
    flex: 1;
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-background);
    color: var(--color-text);
    transition: border-color var(--transition-base);
}

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

/* Buttons */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

.button--primary {
    background-color: var(--color-primary);
    color: var(--color-text);
}

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

.button--secondary {
    background-color: transparent;
    color: var(--color-text-dark);
    border: 2px solid var(--color-text-dark);
}

.button--secondary:hover {
    background-color: var(--color-text-dark);
    color: var(--color-background);
}

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

.footer__content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer__brand {
    max-width: 300px;
}

.footer__logo {
    width: 120px;
    height: auto;
    margin-bottom: var(--spacing-md);
}

.footer__tagline {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    color: var(--color-text-dark);
    transition: color var(--transition-base);
}

.social-link:hover {
    color: var(--color-primary);
}

.footer__links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.footer__title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.footer__list {
    list-style: none;
}

.footer__list li {
    margin-bottom: var(--spacing-sm);
}

.footer__list a {
    color: var(--color-text-light-dark);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

.footer__bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border-dark);
}

.copyright {
    text-align: center;
    color: var(--color-text-light-dark);
}

.copyright a {
    color: var(--color-primary);
    text-decoration: none;
}

.copyright a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: var(--breakpoint-lg)) {
    .header__content {
        grid-template-columns: auto auto;
    }

    .header__nav {
        display: none;
    }

    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--color-background);
        padding: var(--spacing-lg);
        flex-direction: column;
        gap: var(--spacing-md);
    }

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

    .about__content {
        grid-template-columns: 1fr;
    }

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

    .footer__brand {
        margin: 0 auto;
    }

    .social-links {
        justify-content: center;
    }
}

@media (max-width: var(--breakpoint-md)) {
    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .hero__text {
        font-size: var(--font-size-lg);
    }

    .hero__cta {
        flex-direction: column;
    }

    .newsletter__form {
        flex-direction: column;
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }
}

@media (max-width: var(--breakpoint-sm)) {
    .header__actions {
        display: none;
    }

    .hero {
        padding: var(--spacing-2xl) 0;
    }

    .hero__title {
        font-size: var(--font-size-2xl);
    }

    .hero__text {
        font-size: var(--font-size-base);
    }

    .featured__grid {
        grid-template-columns: 1fr;
    }
}

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

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

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

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-overlay);
    border-radius: var(--radius-md);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background-color: var(--color-overlay);
}

::-webkit-scrollbar-thumb {
    background-color: var(--color-primary);
    border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-primary-dark);
}