/* ============================================
   CSS Variables - Design System
   ============================================ */
:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #8b5cf6;
    --color-accent: #ec4899;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-bg: #ffffff;
    --color-bg-light: #f9fafb;
    --color-bg-dark: #111827;
    --color-border: #e5e7eb;
    --color-success: #10b981;
    --color-error: #ef4444;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --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;
    --spacing-4xl: 6rem;
    
    /* Layout */
    --container-max-width: 1200px;
    --container-padding: 1rem;
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Z-index */
    --z-header: 1000;
    --z-modal: 2000;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
}

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

a:hover,
a:focus {
    color: var(--color-primary-dark);
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

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

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

/* ============================================
   Header / Navigation
   ============================================ */
.header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--container-padding);
    min-height: 70px;
    gap: var(--spacing-lg);
}

.nav__brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
    color: var(--color-text);
}

a.nav__brand {
    text-decoration: none;
    color: inherit;
}

.nav__logo {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius);
}

.nav__title {
    display: none;
}

.nav__toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    z-index: calc(var(--z-header) + 1);
}

.nav__toggle span {
    width: 24px;
    height: 3px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.nav__menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    list-style: none;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    gap: 0;
}

.nav__menu[aria-hidden="false"] {
    transform: translateX(0);
}

.nav__link {
    display: block;
    padding: var(--spacing-md);
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    text-align: center;
}

.nav__link:hover,
.nav__link:focus {
    background-color: var(--color-bg-light);
    color: var(--color-primary);
    transform: translateY(-2px);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    min-height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 4s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 5s ease-in-out infinite reverse;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.hero__container {
    display: grid;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero__content {
    text-align: center;
}

.hero__title {
    font-size: var(--font-size-4xl);
    color: white;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero__notice {
    font-size: var(--font-size-sm);
    line-height: 1.55;
    color: rgba(255, 255, 255, 0.88);
    max-width: 36rem;
    margin: 0 auto var(--spacing-xl);
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(0, 0, 0, 0.22);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.hero__notice strong {
    color: #fff;
    font-weight: 600;
}

.hero__cta {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-md);
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.hero__cta .btn {
    flex: 0 1 auto;
    min-width: 120px;
    max-width: 200px;
}

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

.hero__img {
    width: 200px;
    height: 200px;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    white-space: nowrap;
}

.btn--web {
    background-color: rgba(255, 255, 255, 0.15);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
}

.btn--web:hover,
.btn--web:focus {
    background-color: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.btn--primary {
    background-color: #4f46e5;
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn--primary:hover,
.btn--primary:focus {
    background-color: var(--color-bg-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn--secondary {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
}

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

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: var(--spacing-3xl) 0;
}

.section__title {
    text-align: center;
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-sm);
}

.section__subtitle {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   Features Section
   ============================================ */
.features {
    background-color: var(--color-bg-light);
}

.features__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.feature__card {
    background-color: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.5s ease;
}

.feature__card:hover::before {
    left: 100%;
}

.feature__card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
    border: 2px solid rgba(99, 102, 241, 0.3);
}

.feature__icon {
    transition: transform var(--transition-base);
}

.feature__card:hover .feature__icon {
    transform: scale(1.1) rotate(5deg);
}

.feature__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.feature__description {
    color: var(--color-text-light);
    line-height: var(--line-height-relaxed);
}

/* ============================================
   Gallery Section
   ============================================ */
.gallery {
    background-color: var(--color-bg-light);
    position: relative;
    overflow: hidden;
}

.gallery::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.03) 0%, rgba(139, 92, 246, 0.03) 100%);
    pointer-events: none;
}

.gallery .container {
    position: relative;
    z-index: 1;
}

/* Gallery Filters */
.gallery__filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
}

.gallery__filter {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: var(--font-size-base);
}

.gallery__filter:hover,
.gallery__filter:focus {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.gallery__filter.active {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-color: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-lg);
}

.gallery__filter svg {
    width: 20px;
    height: 20px;
}

/* Gallery Carousel */
.gallery__carousel-wrapper {
    position: relative;
    margin-bottom: var(--spacing-2xl);
}

.gallery__carousel {
    display: flex;
    overflow-x: hidden;
    scroll-behavior: smooth;
    gap: var(--spacing-xl);
    padding: var(--spacing-md) 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.gallery__item {
    flex: 0 0 100%;
    max-width: 100%;
    scroll-snap-align: center;
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.gallery__item.active {
    opacity: 1;
    transform: scale(1);
}

.gallery__item.hidden {
    display: none;
}

.gallery__item-inner {
    position: relative;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    cursor: pointer;
    transition: all var(--transition-base);
    background-color: var(--color-bg);
}

.gallery__item-inner:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.gallery__image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-slow);
}

.gallery__item-inner:hover .gallery__image {
    transform: scale(1.1);
}

.gallery__video-wrapper {
    position: relative;
    overflow: hidden;
}

.gallery__play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 2;
    box-shadow: var(--shadow-lg);
}

.gallery__play-button:hover {
    background: white;
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: var(--shadow-xl);
}

.gallery__play-button svg {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
    margin-left: 4px;
}

.gallery__overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
    padding: var(--spacing-xl);
    transform: translateY(100%);
    transition: transform var(--transition-base);
}

.gallery__item-inner:hover .gallery__overlay {
    transform: translateY(0);
}

.gallery__badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--color-text);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.gallery__badge--video {
    background-color: var(--color-accent);
    color: white;
}

.gallery__badge--print {
    background-color: var(--color-primary);
    color: white;
}

.gallery__caption {
    color: white;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    margin: 0;
}

/* Gallery Navigation */
.gallery__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.95);
    border: 2px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    color: var(--color-text);
}

.gallery__nav:hover,
.gallery__nav:focus {
    background-color: white;
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--shadow-lg);
}

.gallery__nav--prev {
    left: -25px;
}

.gallery__nav--next {
    right: -25px;
}

.gallery__nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.gallery__nav:disabled:hover {
    transform: translateY(-50%);
}

/* Gallery Dots */
.gallery__dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.gallery__dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-border);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    padding: 0;
}

.gallery__dot:hover,
.gallery__dot:focus {
    background-color: var(--color-primary);
    transform: scale(1.2);
}

.gallery__dot.active {
    background-color: var(--color-primary);
    width: 32px;
    border-radius: 6px;
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
    backdrop-filter: blur(10px);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox__close {
    position: absolute;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    z-index: 10001;
}

.lightbox__close:hover,
.lightbox__close:focus {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: white;
    transform: rotate(90deg);
}

.lightbox__content {
    max-width: 90%;
    max-height: 90vh;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lightbox__image,
.lightbox__video {
    max-width: 100%;
    max-height: 80vh;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox__video {
    width: 100%;
    max-width: 800px;
}

.lightbox__caption {
    color: white;
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-lg);
    text-align: center;
    max-width: 600px;
}

/* ============================================
   Download Section
   ============================================ */
.download {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-secondary) 100%);
    color: white;
    text-align: center;
}

.download .section__title,
.download .section__subtitle {
    color: white;
}

.download__content {
    max-width: 1000px;
    margin: 0 auto;
}

.download__category {
    margin-bottom: var(--spacing-3xl);
}

.download__category:last-child {
    margin-bottom: 0;
}

.download__category-title {
    font-size: var(--font-size-xl);
    color: white;
    margin-bottom: var(--spacing-lg);
    font-weight: var(--font-weight-semibold);
}

.download__buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
    justify-content: center;
}

.download__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius-lg);
    color: white;
    text-decoration: none;
    transition: all var(--transition-base);
    min-width: 200px;
    backdrop-filter: blur(10px);
}

.download__btn:hover,
.download__btn:focus {
    transform: translateY(-2px);
    background-color: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.download__btn--web {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0.1) 100%);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    padding: var(--spacing-lg) var(--spacing-2xl);
    min-width: 250px;
}

.download__btn--web svg {
    width: 32px;
    height: 32px;
}

.download__btn--desktop {
    flex-direction: row;
    text-align: left;
    padding: var(--spacing-lg);
    min-width: 220px;
}

.download__btn--desktop svg {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.download__btn-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
}

.download__btn-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: white;
}

.download__btn-subtitle {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
}

.download__badge {
    height: 60px;
    width: auto;
    border-radius: var(--border-radius);
    transition: transform var(--transition-base);
}

.download__btn:hover .download__badge {
    transform: scale(1.05);
}

/* ============================================
   Plans Section
   ============================================ */
.plans {
    background-color: var(--color-bg);
}

.plans__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    max-width: 900px;
    margin: 0 auto;
}

.plan__card {
    background-color: var(--color-bg-light);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-2xl);
    position: relative;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.plan__card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.plan__card:hover::after {
    opacity: 1;
}

.plan__card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 25px 50px rgba(99, 102, 241, 0.3);
    border-color: var(--color-primary);
}

.plan__card--premium {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.plan__badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    padding: var(--spacing-xs) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    box-shadow: var(--shadow-md);
}

.plan__header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--color-border);
}

.plan__title {
    font-size: var(--font-size-2xl);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.plan__card--premium .plan__title {
    color: var(--color-primary);
}

.plan__price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-xs);
}

.plan__amount {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
}

.plan__card--premium .plan__amount {
    color: var(--color-primary);
}

.plan__period {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
}

.plan__features {
    list-style: none;
    margin-bottom: var(--spacing-2xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.plan__feature {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    color: var(--color-text);
}

.plan__feature svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--color-success);
}

.plan__feature--disabled {
    opacity: 0.5;
}

.plan__feature--disabled svg {
    color: var(--color-text-light);
}

.plan__feature span {
    line-height: var(--line-height-relaxed);
}

.plan__button {
    display: block;
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    text-align: center;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.plan__button--free {
    background-color: var(--color-bg);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.plan__button--free:hover,
.plan__button--free:focus {
    background-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.plan__button--premium {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    border-color: var(--color-primary);
}

.plan__button--premium:hover,
.plan__button--premium:focus {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    opacity: 0.9;
}

/* ============================================
   About Section
   ============================================ */
.about {
    background-color: var(--color-bg-light);
}

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

.about__text {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

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

.about__feature {
    background-color: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.about__feature strong {
    display: block;
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.about__feature p {
    color: var(--color-text-light);
    margin-bottom: 0;
}

/* ============================================
   Legal / Privacy page
   ============================================ */
.legal-page {
    padding: calc(var(--spacing-3xl) + 2rem) 0 var(--spacing-3xl);
    background-color: var(--color-bg-light);
}

.legal-page__inner {
    width: 100%;
    max-width: 62rem;
    margin: 0 auto;
}

.legal-page__meta {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-2xl);
}

.legal-page .section__title {
    text-align: left;
    margin-bottom: var(--spacing-sm);
}

.legal-page h2 {
    font-size: var(--font-size-2xl);
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
}

.legal-page h3 {
    font-size: var(--font-size-xl);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-sm);
}

.legal-page p,
.legal-page ul {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    text-align: left;
}

@media (max-width: 767px) {
    .legal-page {
        padding: calc(var(--spacing-2xl) + 2rem) 0 var(--spacing-2xl);
    }
}

.legal-page ul {
    padding-left: var(--spacing-xl);
    list-style: disc;
}

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

.legal-page a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.legal-page a:hover,
.legal-page a:focus {
    color: var(--color-primary-dark);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--color-bg-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

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

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

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

.footer__text {
    color: rgba(255, 255, 255, 0.7);
    line-height: var(--line-height-relaxed);
}

.footer__links {
    list-style: none;
}

.footer__link {
    display: block;
    padding: var(--spacing-sm) 0;
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer__link:hover,
.footer__link:focus {
    color: white;
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer__copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* ============================================
   Responsive Breakpoints
   ============================================ */

/* Tablet - 768px and up */
@media (min-width: 768px) {
    :root {
        --container-padding: 2rem;
        --font-size-4xl: 3rem;
        --font-size-5xl: 4rem;
    }
    
    .nav {
        gap: var(--spacing-xl);
    }
    
    .nav__title {
        display: inline;
        font-size: var(--font-size-xl);
    }
    
    .nav__toggle {
        display: none;
    }
    
    .nav__menu {
        position: static;
        transform: none;
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: flex-end;
        background: none;
        border: none;
        box-shadow: none;
        padding: 0;
        margin: 0;
        max-height: none;
        overflow: visible;
        gap: var(--spacing-sm);
        flex: 1;
    }
    
    .nav__link {
        padding: var(--spacing-sm) var(--spacing-md);
        white-space: nowrap;
        text-align: center;
        position: relative;
        font-size: var(--font-size-base);
        min-height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .nav__link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%) scaleX(0);
        width: 0;
        height: 3px;
        background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
        transition: transform var(--transition-base), width var(--transition-base);
        border-radius: 2px 2px 0 0;
    }
    
    .nav__link:hover,
    .nav__link:focus {
        background-color: transparent;
        color: var(--color-primary);
        transform: translateY(0);
    }
    
    .nav__link:hover::after,
    .nav__link:focus::after {
        transform: translateX(-50%) scaleX(1);
        width: 80%;
    }
    
    .hero__container {
        grid-template-columns: 1fr 1fr;
        text-align: left;
    }
    
    .hero__content {
        text-align: left;
    }
    
    .hero__cta {
        justify-content: flex-start;
        gap: var(--spacing-lg);
        flex-wrap: nowrap;
    }
    
    .hero__cta .btn {
        flex: 1 1 0;
        min-width: 150px;
        max-width: none;
    }
    
    .hero__img {
        width: 300px;
        height: 300px;
    }
    
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .gallery__item {
        flex: 0 0 calc(50% - var(--spacing-xl));
        max-width: calc(50% - var(--spacing-xl));
    }
    
    .gallery__nav--prev {
        left: 10px;
    }
    
    .gallery__nav--next {
        right: 10px;
    }
    
    .download__buttons {
        flex-direction: row;
        flex-wrap: wrap;
        gap: var(--spacing-xl);
        justify-content: center;
    }
    
    .download__category {
        width: 100%;
    }
    
    .download__btn--desktop {
        flex: 1;
        min-width: 200px;
        max-width: 280px;
    }
    
    .download__btn--web {
        min-width: 300px;
    }
    
    .about__features {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer__content {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop - 1024px and up */
@media (min-width: 1024px) {
    :root {
        --container-padding: 3rem;
    }
    
    .hero__title {
        font-size: var(--font-size-5xl);
    }
    
    .features__grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .plans__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-3xl);
    }
    
    .gallery__item {
        flex: 0 0 calc(33.333% - var(--spacing-xl));
        max-width: calc(33.333% - var(--spacing-xl));
    }
    
    .gallery__nav--prev {
        left: -25px;
    }
    
    .gallery__nav--next {
        right: -25px;
    }
}

/* Large Desktop / TV - 1920px and up */
@media (min-width: 1920px) {
    :root {
        --container-max-width: 1400px;
        --font-size-base: 1.125rem;
        --font-size-lg: 1.25rem;
        --font-size-xl: 1.5rem;
        --font-size-2xl: 1.875rem;
        --font-size-3xl: 2.5rem;
        --font-size-4xl: 3.5rem;
        --font-size-5xl: 5rem;
    }
    
    .nav {
        min-height: 90px;
        padding: var(--spacing-lg) var(--container-padding);
    }
    
    .nav__logo {
        width: 50px;
        height: 50px;
    }
    
    .nav__link {
        font-size: var(--font-size-lg);
        padding: var(--spacing-md) var(--spacing-xl);
    }
    
    .nav__menu {
        gap: var(--spacing-sm);
    }
    
    section {
        padding: var(--spacing-4xl) 0;
    }
    
    .hero {
        min-height: 90vh;
    }
    
    .hero__img {
        width: 400px;
        height: 400px;
    }
    
    .feature__card {
        padding: var(--spacing-2xl);
    }
    
    .feature__icon {
        width: 80px;
        height: 80px;
    }
    
    .gallery__item {
        max-width: 400px;
    }
    
    .download__badge {
        height: 80px;
    }
}

/* High DPI / Retina Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero__img,
    .gallery__image {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* ============================================
   Accessibility Improvements
   ============================================ */
@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 visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 10000;
}

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

/* ============================================
   Back to Top Button
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover,
.back-to-top:focus {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(99, 102, 241, 0.4);
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-secondary) 100%);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

/* Responsive adjustments for back to top button */
@media (max-width: 767px) {
    .back-to-top {
        bottom: var(--spacing-lg);
        right: var(--spacing-lg);
        width: 45px;
        height: 45px;
    }
    
    .back-to-top svg {
        width: 20px;
        height: 20px;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .header,
    .footer,
    .nav__toggle,
    .hero__cta,
    .download__buttons {
        display: none;
    }
    
    body {
        color: black;
        background: white;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
}

/* ============================================
   Hero Notice Trust Badge
   ============================================ */
.hero__notice--trust {
    border-color: rgba(255, 255, 255, 0.25);
    background: rgba(0, 0, 0, 0.30);
    font-size: var(--font-size-sm);
}

.hero__notice--trust::before {
    content: "⚠️ ";
    margin-right: var(--spacing-xs);
}

/* ============================================
   Hero CTA Hierarchy
   ============================================ */
.btn--cta-primary {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
}

.btn--cta-secondary {
    font-size: var(--font-size-base);
}

.hero__cta-soon {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.55);
    cursor: default;
    padding: var(--spacing-sm) var(--spacing-md);
}

/* ============================================
   About Section Trust Badge
   ============================================ */
.about__trust-badge {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    background: #fffbeb;
    border: 1px solid #fbbf24;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    color: #92400e;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

.about__trust-badge svg {
    flex-shrink: 0;
    color: #d97706;
    margin-top: 2px;
}

.about__trust-badge strong {
    display: block;
    color: #78350f;
    margin-bottom: var(--spacing-xs);
}

/* ============================================
   Plan Note
   ============================================ */
.plan__note {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    text-align: center;
    margin-top: var(--spacing-md);
    padding: 0 var(--spacing-md);
    font-style: italic;
}

/* ============================================
   FAQ Section
   ============================================ */
.faq {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg-light);
}

.faq__list {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.faq__item {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg) var(--spacing-xl);
}

.faq__question {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
}

.faq__answer {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    margin-bottom: 0;
}

/* ============================================
   Toast Notification (replaces alert)
   ============================================ */
.toast-notification {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-bg-dark);
    color: #fff;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-sm);
    z-index: calc(var(--z-modal) + 1);
    box-shadow: var(--shadow-xl);
    animation: toast-in 0.2s ease-out;
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}