/* ===================================
   HAYATE AIRIZE ARMOR Landing Page
   Retro-Sporty Aesthetic
   =================================== */

/* CSS Variables */
:root {
    /* Colors - Retro Sporty Palette */
    --color-primary: #D4AF37; /* Gold */
    --color-primary-dark: #B8941F;
    --color-secondary: #000000; /* Black */
    --color-accent: #FF0000; /* Red */
    --color-white: #FFFFFF;
    --color-off-white: #F8F8F8;
    --color-gray-light: #E5E5E5;
    --color-gray: #999999;
    --color-gray-dark: #333333;
    
    /* Typography */
    --font-display: 'Bebas Neue', 'Oswald', sans-serif;
    --font-heading: 'Oswald', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;
    
    /* Container */
    --container-width: 1200px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--color-secondary);
    background: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

ul {
    list-style: none;
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--color-primary);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo img {
    height: 40px;
    width: auto;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.lang-switch {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: var(--color-gray-dark);
    border: 1px solid var(--color-primary);
    transition: var(--transition-normal);
    flex-shrink: 0;
}

.lang-switch::before {
    content: '🌐';
    font-size: 1.25rem;
}

.lang-switch:hover {
    background: var(--color-primary);
    transform: scale(1.1);
}

.lang-switch::after {
    display: none !important;
}

.nav a {
    color: var(--color-white);
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-normal);
}

.nav a:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--color-primary);
    color: var(--color-secondary) !important;
    padding: 0.5rem 1.5rem;
    border-radius: 0;
    font-weight: 700;
}

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

.nav-cta::after {
    display: none;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

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

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    filter: brightness(1.3);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.2) 50%, rgba(0,0,0,0.4) 100%);
}

.hero-content {
    position: relative;
    z-index: 10;
    color: var(--color-white);
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-white);
    padding: 0.5rem 1.5rem;
    font-family: var(--font-heading);
    font-size: 0.875rem;
    letter-spacing: 0.15em;
    margin-bottom: var(--spacing-md);
    animation: slideInLeft 0.8s ease;
    align-self: flex-start;
    margin-top: var(--spacing-xl);
}

.hero-title {
    animation: slideInLeft 0.8s ease 0.2s both;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    text-align: center;
}

.hero-title-tagline {
    display: block;
    font-family: 'Noto Serif JP', serif;
    font-size: clamp(1.5rem, 3vw, 2rem);
    line-height: 1.4;
    letter-spacing: 0.1em;
    font-weight: 400;
}

.hero-logo {
    width: auto;
    max-width: 100%;
    height: auto;
    max-height: clamp(80px, 15vw, 150px);
    object-fit: contain;
}

.hero-title-reading {
    display: block;
    font-family: var(--font-body);
    font-size: clamp(0.875rem, 1.5vw, 1.125rem);
    letter-spacing: 0.2em;
    color: var(--color-gray);
    font-weight: 300;
}

.hero-title-main {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 1;
    letter-spacing: 0.02em;
    margin-bottom: var(--spacing-sm);
    text-shadow: 3px 3px 0 var(--color-primary);
}

.hero-subtitle {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 300;
    margin-bottom: var(--spacing-lg);
    letter-spacing: 0.05em;
    animation: slideInLeft 0.8s ease 0.4s both;
    text-align: center;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    animation: slideInLeft 0.8s ease 0.6s both;
    justify-content: center;
}

.hero-specs {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    animation: slideInLeft 0.8s ease 0.8s both;
    justify-content: center;
}

.spec-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.spec-label {
    font-size: 0.875rem;
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-weight: 600;
}

.spec-value {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--color-primary);
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.spec-divider {
    width: 1px;
    height: 40px;
    background: var(--color-gray);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-white);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    animation: fadeIn 1s ease 1s both;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: var(--color-primary);
    animation: scrollLine 2s ease-in-out infinite;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn span {
    position: relative;
    z-index: 1;
}

.btn svg {
    position: relative;
    z-index: 1;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

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

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

.btn.large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

/* Section Styles */
section {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

.section-header {
    margin-bottom: var(--spacing-xl);
}

.section-header.center {
    text-align: center;
}

.section-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.875rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    line-height: 1.1;
    letter-spacing: 0.02em;
    color: var(--color-secondary);
}

/* Problem & Solution Section */
.problem-solution {
    background-image: url('/images/problem-solution-bg.jpg');
    background-size: cover;
    background-position: center top;
    background-repeat: no-repeat;
    position: relative;
    min-height: 600px;
}

.problem-solution::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(248, 248, 248, 0.6);
    z-index: 1;
}

.problem-solution .container {
    position: relative;
    z-index: 2;
}

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

.problem-card {
    background: rgba(255, 255, 255, 0.65);
    padding: var(--spacing-lg);
    border-left: 4px solid var(--color-accent);
    transition: var(--transition-normal);
    backdrop-filter: blur(3px);
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    background: rgba(255, 255, 255, 0.75);
}

.problem-number {
    font-family: var(--font-display);
    font-size: 3rem;
    color: var(--color-gray-light);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.problem-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.problem-desc {
    color: var(--color-gray-dark);
    font-size: 0.95rem;
}

.solution-section {
    display: block;
    max-width: 800px;
    margin: 0 auto;
}

.solution-images {
    display: none;
}

.solution-title {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
    text-align: center;
}

.highlight {
    color: var(--color-primary);
}

.solution-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.solution-feature {
    display: flex;
    gap: var(--spacing-md);
}

.feature-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    stroke: var(--color-primary);
}

.feature-text h4 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.feature-text p {
    color: var(--color-gray-dark);
    font-size: 0.95rem;
}

/* Models Section */
.models {
    background: var(--color-secondary);
    color: var(--color-white);
}

.models .section-title {
    color: var(--color-white);
}

.model-card {
    position: relative;
    margin-bottom: var(--spacing-xl);
    background: var(--color-gray-dark);
    overflow: hidden;
}

.model-card.armor-standard {
    background-image: url('https://www.genspark.ai/api/files/s/WxUPx6yS');
    background-size: cover;
    background-position: center top;
}

.model-card.armor-standard .model-bg {
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.65) 0%, rgba(0, 0, 0, 0.75) 100%);
    opacity: 1;
}

.model-card.armor-pro {
    border: 2px solid var(--color-primary);
    box-shadow: 0 0 30px rgba(212, 175, 55, 0.3);
    background-image: url('https://www.genspark.ai/api/files/s/QD43so6s');
    background-size: cover;
    background-position: center top;
}

.model-card.armor-pro .model-bg {
    background: linear-gradient(135deg, rgba(42, 42, 42, 0.65) 0%, rgba(26, 26, 26, 0.75) 50%, rgba(42, 42, 42, 0.65) 100%);
    opacity: 1;
}

.model-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a1a 0%, #000000 100%);
    opacity: 0.8;
}

.model-content {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    align-items: center;
}

.model-content.reverse {
    direction: rtl;
}

.model-content.reverse > * {
    direction: ltr;
}

.model-logo-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.model-logo {
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.model-logo img {
    height: auto;
    width: auto;
    max-width: 100%;
    max-height: 120px;
}

.model-reading {
    font-family: var(--font-body);
    font-size: 0.875rem;
    letter-spacing: 0.2em;
    color: var(--color-gray-light);
    font-weight: 300;
    text-align: center;
}

.model-badge {
    display: inline-block;
    background: var(--color-gray-dark);
    color: var(--color-primary);
    padding: 0.5rem 1rem;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--color-primary);
}

.model-badge.pro {
    background: var(--color-primary);
    color: var(--color-secondary);
    border-color: var(--color-primary);
}

.model-name {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.model-desc {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-light);
}

.model-price {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
    border-top: 2px solid var(--color-primary);
    border-bottom: 2px solid var(--color-primary);
}

.price-main {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.price-value {
    font-family: var(--font-display);
    font-size: 3rem;
    color: var(--color-primary);
    line-height: 1;
}

.price-unit {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.price-note {
    font-size: 0.875rem;
    color: var(--color-gray);
}

.model-specs {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.spec-group h4 {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.spec-group p {
    font-size: 0.95rem;
    color: var(--color-gray-light);
}

.spec-group ul {
    list-style: none;
}

.spec-group ul li {
    font-size: 0.95rem;
    color: var(--color-gray-light);
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
}

.spec-group ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.model-gallery {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.gallery-main img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.gallery-sub {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.gallery-sub img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.model-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.detail-card {
    text-align: center;
}

.detail-card img {
    width: 100%;
    height: auto;
    margin-bottom: var(--spacing-sm);
    border: 2px solid var(--color-primary);
}

.detail-card p {
    font-size: 0.875rem;
    color: var(--color-gray-light);
}

/* Technology Section */
.technology {
    background: var(--color-white);
}

.tech-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.tech-visual {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.tech-visual img {
    width: 100%;
    height: auto;
    object-fit: cover;
    border: 3px solid var(--color-secondary);
}

.tech-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.tech-feature {
    display: flex;
    gap: var(--spacing-md);
}

.tech-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--color-secondary);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 2rem;
    border: 3px solid var(--color-primary);
}

.tech-content h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.tech-content p {
    color: var(--color-gray-dark);
    line-height: 1.7;
}

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

.summary-card {
    background: var(--color-off-white);
    padding: var(--spacing-lg);
    border-left: 4px solid var(--color-primary);
}

.summary-card h4 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.summary-card p {
    color: var(--color-gray-dark);
}

/* Bonus Section */
.bonus {
    background-image: url('/images/bonus-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--color-white);
    position: relative;
    overflow: hidden;
    min-height: 600px;
}

.bonus::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.bonus-content {
    position: relative;
    z-index: 2;
}

.bonus-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.bonus-title {
    font-family: 'Noto Serif JP', serif;
    font-size: clamp(2.5rem, 5vw, 4rem);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    letter-spacing: 0.1em;
}

.bonus-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-light);
}

.bonus-main {
    display: block;
    max-width: 800px;
    margin: 0 auto;
}

.bonus-images {
    display: none;
}

.bonus-details h3 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
    text-align: center;
}

.bonus-specs {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.bonus-spec {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: rgba(212, 175, 55, 0.15);
    border: 2px solid var(--color-primary);
}

.bonus-spec span {
    font-family: 'Noto Serif JP', serif;
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--color-white);
}

.spec-icon {
    display: none;
}

.bonus-value {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-gray-light);
    text-align: center;
}

/* Ambassador Section */
.ambassador {
    background: var(--color-off-white);
}

.ambassador-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.ambassador-image {
    position: relative;
}

.ambassador-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.ambassador-badge {
    position: absolute;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    background: var(--color-primary);
    color: var(--color-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: 0.1em;
    font-size: 0.875rem;
}

.ambassador-profiles {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.profile-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-left: 4px solid var(--color-gray-light);
}

.profile-card.main {
    border-left-color: var(--color-primary);
    border-left-width: 6px;
}

.profile-card h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.profile-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--color-gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.profile-achievements {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.achievement {
    padding: var(--spacing-md);
    background: var(--color-off-white);
}

.achievement.highlight {
    background: var(--color-secondary);
    color: var(--color-white);
}

.achievement-label {
    display: block;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.achievement.highlight .achievement-label {
    color: var(--color-gray-light);
}

.achievement-value {
    display: block;
    font-family: var(--font-display);
    font-size: 3rem;
    color: var(--color-primary);
    line-height: 1;
}

.achievement-years {
    display: block;
    font-size: 1rem;
    color: var(--color-gray);
    margin-top: 0.5rem;
}

.achievement.highlight .achievement-years {
    color: var(--color-gray-light);
}

.profile-record h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.profile-record ul li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
    color: var(--color-gray-dark);
}

.profile-record ul li::before {
    content: '●';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* Pre-Order Section */
.preorder {
    background: var(--color-primary);
    color: var(--color-secondary);
    padding: var(--spacing-xl) 0;
}

.preorder-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.preorder-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.875rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.preorder-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
}

.preorder-subtitle {
    display: none;
}

.preorder-info {
    background: var(--color-white);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.preorder-dates {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.date-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-off-white);
    min-width: 150px;
}

.date-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray);
    margin-bottom: 0.25rem;
}

.date-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--color-secondary);
}

.date-day {
    display: none;
}

.date-arrow {
    font-size: 2rem;
    color: var(--color-primary);
}

.preorder-benefits h3 {
    display: none;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
}

.benefit-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-white);
    border: 2px solid var(--color-secondary);
    position: relative;
    min-height: 80px;
}

.benefit-item::before {
    content: '✓';
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    width: 20px;
    height: 20px;
    background: var(--color-primary);
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 0.875rem;
}

.benefit-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.3);
    transition: all 0.3s ease;
}

.benefit-icon {
    display: none;
}

.benefit-item p {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.4;
    text-align: center;
    color: var(--color-secondary);
}

.preorder-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.preorder-note {
    display: none;
}

/* Footer */
.footer {
    background: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

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

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-brand a {
    display: block;
}

.footer-logo {
    height: 180px;
    width: auto;
    margin-bottom: var(--spacing-sm);
}

.footer-tagline-link {
    text-decoration: none;
    transition: var(--transition-normal);
}

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

.footer-tagline {
    color: var(--color-gray);
    font-size: 0.95rem;
    text-align: center;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.footer-col ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-col ul li a {
    color: var(--color-gray-light);
    font-size: 0.95rem;
}

.footer-col ul li a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-dark);
    font-size: 0.875rem;
    color: var(--color-gray);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: var(--color-gray-dark);
    color: var(--color-gray-light);
    border-radius: 50%;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

/* Instagram gradient background */
.footer-social a[aria-label="Instagram"] {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: white;
}

.footer-social a[aria-label="Instagram"]:hover {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 25px rgba(240, 148, 51, 0.6);
}

/* LINE button */
.footer-social a[aria-label="LINE"] {
    background-color: #06C755;
    color: white;
}

.footer-social a[aria-label="LINE"]:hover {
    background-color: #05b34b;
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 25px rgba(6, 199, 85, 0.6);
}

/* Animations */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes scrollLine {
    0%, 100% {
        transform: scaleY(0);
        transform-origin: top;
    }
    50% {
        transform: scaleY(1);
        transform-origin: top;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 5rem;
    }
    
    .solution-section,
    .tech-showcase,
    .bonus-main,
    .ambassador-content {
        grid-template-columns: 1fr;
    }
    
    .model-content {
        grid-template-columns: 1fr;
    }
    
    .model-content.reverse {
        direction: ltr;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .hero-badge {
        margin-top: calc(var(--spacing-xl) + 80px);
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .problems-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-sub {
        grid-template-columns: 1fr;
    }
    
    .tech-summary,
    .model-details-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .preorder-dates {
        flex-direction: column;
    }
    
    .date-arrow {
        transform: rotate(90deg);
    }
    
    /* Bonus section mobile optimization */
    .bonus {
        background-attachment: scroll;
        background-position: center center;
    }
    
    .bonus::before {
        background: rgba(0, 0, 0, 0.65);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
        --spacing-xxl: 4rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    /* Hero section mobile adjustments */
    .hero-badge {
        margin-top: calc(var(--spacing-xl) + 80px);
    }
}