/* ===== CSS RESET & BASE STYLES ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

/* ===== CSS CUSTOM PROPERTIES (THEME VARIABLES) ===== */
:root {
    /* Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --accent-primary: #dc2626;
    --accent-secondary: #f59e0b;
    --accent-tertiary: #10b981;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --gradient-primary: linear-gradient(135deg, #dc2626 0%, #f59e0b 100%);
    --gradient-secondary: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    --gradient-hero: linear-gradient(135deg, rgba(220, 38, 38, 0.6) 0%, rgba(245, 158, 11, 0.6) 100%);
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent-primary: #ef4444;
    --accent-secondary: #fbbf24;
    --accent-tertiary: #34d399;
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
    --gradient-primary: linear-gradient(135deg, #ef4444 0%, #fbbf24 100%);
    --gradient-secondary: linear-gradient(135deg, #1e293b 0%, #475569 100%);
    --gradient-hero: linear-gradient(135deg, rgba(239, 68, 68, 0.6) 0%, rgba(251, 191, 36, 0.6) 100%);
}

/* ===== UTILITY CLASSES ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--accent-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 6px;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

.section__title {
    font-size: clamp(2rem, 5vw, 3rem);
    text-align: center;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section__description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn--outline:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-primary);
}

.btn--large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn--full {
    width: 100%;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

[data-theme="dark"] .header {
    background: rgba(15, 23, 42, 0.95);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.nav__brand {
    flex-shrink: 0;
}

.nav__logo {
    height: 40px;
    width: auto;
}

.nav__menu {
    display: flex;
    align-items: center;
}

.nav__list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav__link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    padding: 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
    transition: all 0.3s ease;
    position: relative;
}

.theme-toggle:hover {
    background: var(--bg-secondary);
}

.theme-toggle__icon {
    width: 20px;
    height: 20px;
    transition: all 0.3s ease;
}

.theme-toggle__icon--moon {
    position: absolute;
    opacity: 0;
    transform: rotate(180deg);
}

[data-theme="dark"] .theme-toggle__icon--sun {
    opacity: 0;
    transform: rotate(180deg);
}

[data-theme="dark"] .theme-toggle__icon--moon {
    opacity: 1;
    transform: rotate(0deg);
}

/* Mobile Menu Toggle */
.nav__toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    gap: 4px;
}

.nav__toggle-line {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ===== HERO SECTION ===== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero__slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero__slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.hero__slide.active {
    opacity: 1;
}

.hero__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    z-index: 2;
}

.hero__content {
    position: relative;
    z-index: 3;
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 0 1rem;
}

.hero__title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero__brand {
    display: block;
    background: linear-gradient(135deg, #ffffff 0%, #fbbf24 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    display: block;
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    font-weight: 400;
    margin-top: 0.5rem;
    opacity: 0.9;
}

.hero__description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero__actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero__scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    animation: bounce 2s infinite;
}

.hero__scroll-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.hero__scroll-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ===== CTA SECTION ===== */
.cta {
    padding: 4rem 0;
    background: var(--gradient-primary);
    color: white;
    text-align: center;
}

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

.cta__title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 1rem;
}

.cta__description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ===== PRICING SECTION ===== */
.pricing {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.section__header {
    margin-bottom: 3rem;
}

.pricing__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing__card {
    background: var(--bg-primary);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    position: relative;
    border: 1px solid var(--border-color);
}

.pricing__card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.pricing__card--featured {
    border: 2px solid var(--accent-primary);
    transform: scale(1.05);
}

.pricing__badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing__header {
    text-align: center;
    margin-bottom: 2rem;
}

.pricing__heat-level {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.pricing__heat-icon {
    font-size: 1.5rem;
}

.pricing__heat-text {
    font-weight: 600;
    color: var(--accent-primary);
}

.pricing__image {
    width: 100%;
    height: 200px;
    border-radius: 0.5rem;
    overflow: hidden;
    margin-bottom: 1rem;
}

.pricing__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.pricing__card:hover .pricing__image img {
    transform: scale(1.05);
}

.pricing__title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.pricing__content {
    text-align: center;
}

.pricing__price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.pricing__currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.pricing__amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-left: 0.25rem;
}

.pricing__features {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.pricing__features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.pricing__features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-tertiary);
    font-weight: bold;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-tertiary);
    padding: 3rem 0 1rem;
    border-top: 1px solid var(--border-color);
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer__brand {
    text-align: center;
}

.footer__logo {
    height: 40px;
    margin-bottom: 1rem;
}

.footer__description {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer__title {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.footer__list {
    list-style: none;
}

.footer__list li {
    margin-bottom: 0.5rem;
}

.footer__link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer__link:hover {
    color: var(--accent-primary);
}

.footer__text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.footer__bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer__copyright {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ===== ADDITIONAL MOBILE ENHANCEMENTS ===== */
.keyboard-navigation *:focus {
    outline: 2px solid var(--accent-primary) !important;
    outline-offset: 2px !important;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-primary);
        border-top: 1px solid var(--border-color);
        padding: 2rem 1rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav__list {
        flex-direction: column;
        gap: 1rem;
    }

    .nav__toggle {
        display: flex;
    }

    .nav__toggle.active .nav__toggle-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav__toggle.active .nav__toggle-line:nth-child(2) {
        opacity: 0;
    }

    .nav__toggle.active .nav__toggle-line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero__actions {
        flex-direction: column;
        align-items: center;
    }

    .pricing__card--featured {
        transform: none;
    }

    .pricing__grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }

    .hero {
        min-height: 500px;
    }

    .pricing__card {
        padding: 1.5rem;
    }

    .pricing__amount {
        font-size: 2.5rem;
    }
}

/* ===== ACCESSIBILITY ===== */
@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;
    }
}

/* Focus styles for better accessibility */
.btn:focus,
.nav__link:focus,
.theme-toggle:focus,
.nav__toggle:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
@media print {
    .header,
    .hero__scroll-indicator,
    .cta,
    .footer {
        display: none;
    }

    .hero {
        height: auto;
        min-height: auto;
        padding: 2rem 0;
    }

    .pricing {
        padding: 2rem 0;
    }

    .pricing__card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}