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

:root {
    /* Colors */
    --primary-color: #FF0066;
    --secondary-color: #00FFFF;
    --accent-color: #FFFF00;
    --dark-bg: #0A0A0A;
    --darker-bg: #050505;
    --light-text: #FFFFFF;
    --mid-text: #CCCCCC;
    --dim-text: #888888;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #FF0066, #00FFFF);
    --gradient-dark: linear-gradient(180deg, #0A0A0A, #1A1A1A);
    --gradient-glow: radial-gradient(circle, rgba(255,0,102,0.3), transparent);
    
    /* Animations */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.6s ease;
    --transition-slow: 1s ease;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--dark-bg);
    color: var(--light-text);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--darker-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
}

.loading-text {
    font-family: 'Oswald', sans-serif;
    font-size: 3rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: pulse 2s infinite;
}

.loading-bar {
    width: 200px;
    height: 2px;
    background: rgba(255,255,255,0.1);
    margin: 2rem auto;
    position: relative;
    overflow: hidden;
}

.loading-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    animation: loading-sweep 2s infinite;
}

@keyframes loading-sweep {
    to {
        left: 100%;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

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

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

.particle-field {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, var(--primary-color), transparent),
        radial-gradient(2px 2px at 40px 70px, var(--secondary-color), transparent),
        radial-gradient(1px 1px at 50px 90px, var(--accent-color), transparent);
    background-size: 100px 100px;
    animation: particle-float 20s infinite linear;
}

@keyframes particle-float {
    to {
        transform: translate(-50px, -50px);
    }
}

.glitch-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(255,0,102,0.03) 50%,
        transparent 100%
    );
    animation: glitch-scan 8s infinite linear;
}

@keyframes glitch-scan {
    0%, 100% {
        transform: translateY(-100%);
    }
    50% {
        transform: translateY(100%);
    }
}

.hero-content {
    text-align: center;
    z-index: 1;
    padding: 2rem;
}

/* Countdown Display */
.countdown-main {
    margin-bottom: 3rem;
    animation: fade-in-up 1s ease forwards;
}

.countdown-label {
    font-size: 1.2rem;
    color: var(--mid-text);
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
}

.countdown-display {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    font-family: 'Oswald', sans-serif;
}

.countdown-unit {
    text-align: center;
}

.countdown-number {
    display: block;
    font-size: 4rem;
    font-weight: 600;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(255,0,102,0.5);
    animation: number-pulse 2s infinite;
}

@keyframes number-pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.countdown-text {
    display: block;
    font-size: 0.8rem;
    color: var(--dim-text);
    letter-spacing: 0.2em;
    margin-top: 0.5rem;
}

.countdown-separator {
    font-size: 3rem;
    color: var(--primary-color);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 49% {
        opacity: 1;
    }
    50%, 100% {
        opacity: 0.3;
    }
}

/* Hero Title */
.hero-title {
    margin-bottom: 2rem;
    animation: fade-in-up 1s ease 0.2s forwards;
    opacity: 0;
}

.title-main {
    display: block;
    font-family: 'Oswald', sans-serif;
    font-size: 5rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient-shift 3s linear infinite;
}

@keyframes gradient-shift {
    to {
        background-position: 200% center;
    }
}

.title-sub {
    display: block;
    font-size: 1.5rem;
    color: var(--mid-text);
    margin-top: 0.5rem;
    letter-spacing: 0.3em;
}

.hero-tagline {
    font-size: 1.2rem;
    color: var(--mid-text);
    margin-bottom: 3rem;
    line-height: 1.8;
    animation: fade-in-up 1s ease 0.4s forwards;
    opacity: 0;
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 1rem 3rem;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--light-text);
    border-radius: 50px;
    box-shadow: 0 10px 30px rgba(255,0,102,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(255,0,102,0.4);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255,255,255,0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:active::before {
    width: 300px;
    height: 300px;
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: 50px;
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--light-text);
    box-shadow: 0 10px 30px rgba(255,0,102,0.3);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    font-size: 0.8rem;
    color: var(--dim-text);
    letter-spacing: 0.2em;
}

.scroll-line {
    width: 1px;
    height: 30px;
    background: var(--gradient-primary);
    margin: 0.5rem auto 0;
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--light-text);
    animation: scroll-down 2s infinite;
}

@keyframes scroll-down {
    to {
        top: 100%;
    }
}

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

/* Section Base */
.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.title-en {
    display: block;
    font-family: 'Oswald', sans-serif;
    font-size: 3rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.title-jp {
    display: block;
    font-size: 1rem;
    color: var(--mid-text);
    margin-top: 0.5rem;
    letter-spacing: 0.3em;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 6rem 0;
    position: relative;
}

/* Concept Section */
.concept {
    background: linear-gradient(180deg, var(--dark-bg), var(--darker-bg));
}

.concept-lead {
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.concept-lead .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.concept-text {
    text-align: center;
    color: var(--mid-text);
    font-size: 1.1rem;
    line-height: 2;
    margin-bottom: 4rem;
}

.concept-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.feature-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,0,102,0.1), transparent);
    transition: left 0.8s;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(255,0,102,0.2);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.icon-number {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.icon-clock, .icon-memory {
    display: inline-block;
    animation: icon-float 3s infinite ease-in-out;
}

@keyframes icon-float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--light-text);
}

.feature-card p {
    color: var(--mid-text);
    line-height: 1.6;
}

/* Members Section */
.members {
    background: var(--darker-bg);
}

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

.member-card {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    transition: all var(--transition-medium);
    cursor: pointer;
}

.member-card:hover {
    transform: scale(1.05);
    box-shadow: 0 20px 40px rgba(255,0,102,0.3);
}

.member-image {
    position: relative;
    width: 100%;
    padding-bottom: 125%; /* 4:5 aspect ratio */
    overflow: hidden;
}

.member-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-medium);
}

.member-card:hover .member-image img {
    transform: scale(1.1);
}

.member-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.8) 100%);
    opacity: 0;
    transition: opacity var(--transition-medium);
}

.member-card:hover .member-overlay {
    opacity: 1;
}

.countdown-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255,0,102,0.9);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    text-align: center;
}

.remaining-days {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
}

.days-label {
    display: block;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
}

.member-info {
    padding: 1.5rem;
    background: rgba(255,255,255,0.02);
}

.member-name {
    font-family: 'Oswald', sans-serif;
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.member-role {
    color: var(--dim-text);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.member-message {
    color: var(--mid-text);
    font-style: italic;
    font-size: 0.9rem;
}

/* Timeline Section */
.timeline {
    background: linear-gradient(180deg, var(--darker-bg), var(--dark-bg));
}

.timeline-container {
    position: relative;
    padding: 2rem 0;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(255,255,255,0.1);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 4rem;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    justify-content: flex-start;
    text-align: right;
}

.timeline-item:nth-child(even) {
    justify-content: flex-end;
    text-align: left;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--dark-bg);
    border: 3px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    z-index: 1;
    transition: all var(--transition-fast);
}

.timeline-item.past .timeline-marker {
    background: var(--dim-text);
    border-color: var(--dim-text);
}

.timeline-item.current .timeline-marker {
    background: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 0 20px var(--primary-color);
    animation: pulse-marker 2s infinite;
}

@keyframes pulse-marker {
    0%, 100% {
        transform: translateX(-50%) scale(1);
    }
    50% {
        transform: translateX(-50%) scale(1.2);
    }
}

.timeline-item.future .timeline-marker {
    background: transparent;
}

.timeline-content {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    padding: 2rem;
    width: 45%;
    transition: all var(--transition-medium);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: auto;
    margin-left: 0;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: auto;
    margin-right: 0;
}

.timeline-content:hover {
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(255,0,102,0.2);
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--light-text);
}

.timeline-date {
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.timeline-content p {
    color: var(--mid-text);
}

.current-countdown {
    margin-top: 1rem;
    font-family: 'Oswald', sans-serif;
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: 500;
}

/* Memory Bank Section */
.memory-bank {
    background: var(--dark-bg);
}

.memory-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.stat-card {
    text-align: center;
    padding: 2rem;
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    transition: all var(--transition-medium);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.stat-number {
    font-family: 'Oswald', sans-serif;
    font-size: 3rem;
    font-weight: 600;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--mid-text);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

.memory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
    min-height: 200px;
}

.memory-item {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    padding: 1.5rem;
    transition: all var(--transition-medium);
    animation: fade-in-up 0.6s ease forwards;
}

.memory-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(255,0,102,0.2);
}

.memory-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.memory-name {
    font-weight: 500;
    color: var(--primary-color);
}

.memory-date {
    font-size: 0.8rem;
    color: var(--dim-text);
}

.memory-message {
    color: var(--mid-text);
    line-height: 1.6;
}

.memory-cta {
    text-align: center;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(10px);
}

.modal-content {
    background: var(--darker-bg);
    margin: 15% auto;
    padding: 2rem;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    position: relative;
}

.modal-close {
    color: var(--dim-text);
    float: right;
    font-size: 2rem;
    font-weight: 300;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--primary-color);
}

.modal h3 {
    margin-bottom: 2rem;
    text-align: center;
    font-size: 1.5rem;
}

#memory-form input,
#memory-form textarea {
    width: 100%;
    padding: 1rem;
    margin-bottom: 1rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 5px;
    color: var(--light-text);
    font-family: inherit;
    transition: all var(--transition-fast);
}

#memory-form input:focus,
#memory-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255,255,255,0.08);
}

#memory-form textarea {
    min-height: 120px;
    resize: vertical;
}

#memory-form button {
    width: 100%;
}

/* Footer */
.footer {
    background: var(--darker-bg);
    padding: 3rem 0;
    border-top: 1px solid rgba(255,255,255,0.1);
}

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

.footer-logo h3 {
    font-family: 'Oswald', sans-serif;
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-logo p {
    color: var(--dim-text);
    font-size: 0.9rem;
}

.footer-countdown {
    text-align: center;
}

.footer-countdown p {
    color: var(--mid-text);
    font-size: 0.9rem;
}

.footer-days {
    font-family: 'Oswald', sans-serif;
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 500;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.footer-link {
    color: var(--mid-text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-bottom p {
    color: var(--dim-text);
    font-size: 0.8rem;
}

/* Fade In Animation */
@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .countdown-display {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .countdown-number {
        font-size: 2.5rem;
    }
    
    .title-main {
        font-size: 3rem;
    }
    
    .title-en {
        font-size: 2rem;
    }
    
    .timeline-item {
        flex-direction: column;
        text-align: center !important;
    }
    
    .timeline-content {
        width: 100%;
        margin: 0 !important;
    }
    
    .timeline-line {
        left: 1rem;
    }
    
    .timeline-marker {
        left: 1rem;
    }
    
    .members-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 480px) {
    .hero-content {
        padding: 1rem;
    }
    
    .countdown-number {
        font-size: 2rem;
    }
    
    .title-main {
        font-size: 2.5rem;
    }
    
    .btn-primary, .btn-secondary {
        padding: 0.8rem 2rem;
        font-size: 0.9rem;
    }
    
    .memory-grid {
        grid-template-columns: 1fr;
    }
}