/* ============================================
   Zero Trace Design - Legacy Timer Website
   Cyberpunk Minimalist Design
   ============================================ */

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

:root {
    /* Colors - グローを抑えた配色 */
    --color-black: #000000;
    --color-matrix-green: #00FF00;
    --color-matrix-green-dim: #00CC00; /* 少し暗めの緑 */
    --color-warning-red: #FF0000;
    --color-dark-gray: #1a1a1a;
    --color-light-gray: #333333;
    --color-text-white: #ffffff;
    --color-text-gray: #cccccc;
    
    /* Fonts */
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;
    
    /* Spacing - よりコンパクトに */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 700;
}

.glow-text {
    color: var(--color-matrix-green);
    /* グローエフェクトを大幅に削減 */
    text-shadow: 0 0 5px rgba(0, 255, 0, 0.3);
}

/* アニメーションを削除してシンプルに */

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-matrix-green);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-matrix-green);
    text-decoration: none;
}

.logo-icon {
    font-size: 2rem;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-matrix-green);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--color-matrix-green);
}

.nav-link:hover::after {
    width: 100%;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.matrix-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, 
                var(--color-black) 0%, 
                var(--color-dark-gray) 50%, 
                var(--color-black) 100%);
    opacity: 0.3;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.title-main {
    font-size: 4rem;
    font-weight: 900;
    letter-spacing: 0.1em;
}

.title-sub {
    font-size: 1.5rem;
    font-weight: 400;
    font-family: var(--font-body);
}

.hero-description {
    font-size: 1.2rem;
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    border: 2px solid;
    border-radius: 4px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-matrix-green);
    border-color: var(--color-matrix-green);
    color: var(--color-black);
}

.btn-primary:hover {
    background: transparent;
    color: var(--color-matrix-green);
}

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

.btn-secondary:hover {
    background: var(--color-matrix-green);
    color: var(--color-black);
}

.glow-button {
    /* ボタンのグローも控えめに */
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.3);
}

.glow-button:hover {
    box-shadow: 0 0 15px rgba(0, 255, 0, 0.5);
}

.beta-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1rem;
    background: rgba(255, 0, 0, 0.15);
    border: 1px solid rgba(255, 0, 0, 0.6);
    color: var(--color-warning-red);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

/* ============================================
   Features Section
   ============================================ */
.features {
    padding: var(--spacing-xl) 0;
    background: var(--color-dark-gray);
}

.section-title {
    font-size: 3rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-weight: 900;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--color-black);
    border: 1px solid var(--color-light-gray);
    padding: var(--spacing-md);
    transition: all 0.3s ease;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.feature-title {
    font-size: 1.5rem;
    color: var(--color-matrix-green);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.feature-list {
    list-style: none;
    padding: 0;
}

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

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-matrix-green);
    font-weight: bold;
}

/* ============================================
   Download Section
   ============================================ */
.download {
    padding: var(--spacing-xl) 0;
    background: var(--color-black);
}

.download-box {
    background: var(--color-dark-gray);
    border: 1px solid rgba(0, 255, 0, 0.3);
    padding: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}

.warning-banner {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    background: rgba(255, 0, 0, 0.08);
    border: 1px solid rgba(255, 0, 0, 0.5);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.warning-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
}

.warning-text {
    color: var(--color-text-gray);
    line-height: 1.5;
    font-size: 0.9rem;
}

.warning-text strong {
    color: var(--color-warning-red);
}

.download-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.version-info {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-md);
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--color-black);
    border: 1px solid var(--color-light-gray);
}

.version-badge {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-matrix-green);
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 2px solid var(--color-matrix-green);
    min-width: 100px;
    text-align: center;
}

.version-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem 1rem;
    flex: 1;
}

.version-item {
    display: flex;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.version-label {
    color: var(--color-text-gray);
    min-width: 80px;
    font-size: 0.85rem;
}

.version-value {
    color: var(--color-text-white);
    font-size: 0.85rem;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
}

.btn-download {
    width: 100%;
    max-width: 400px;
    justify-content: center;
    font-size: 1.3rem;
    padding: 1.5rem 3rem;
}

.playstore-coming-soon {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-gray);
    font-size: 1rem;
}

.install-steps {
    background: var(--color-black);
    padding: var(--spacing-md);
    border: 1px solid var(--color-light-gray);
    margin-top: var(--spacing-md);
}

.steps-title {
    font-size: 1.3rem;
    color: var(--color-matrix-green);
    margin-bottom: var(--spacing-sm);
}

.steps-list {
    list-style: none;
    counter-reset: step-counter;
    padding: 0;
}

.steps-list li {
    counter-increment: step-counter;
    margin-bottom: var(--spacing-sm);
    padding-left: 2.5rem;
    position: relative;
}

.steps-list li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 1.8rem;
    height: 1.8rem;
    background: var(--color-matrix-green);
    color: var(--color-black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-family: var(--font-display);
    font-size: 0.9rem;
}

.steps-list li strong {
    color: var(--color-matrix-green);
    display: block;
    margin-bottom: 0.3rem;
    font-size: 1rem;
}

.steps-list li p {
    color: var(--color-text-gray);
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.5;
}

.feedback-section {
    background: var(--color-black);
    padding: var(--spacing-md);
    border: 1px solid var(--color-matrix-green);
    margin-top: var(--spacing-md);
    text-align: center;
}

.feedback-title {
    font-size: 1.5rem;
    color: var(--color-matrix-green);
    margin-bottom: var(--spacing-sm);
}

.feedback-description {
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

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

.btn-feedback {
    background: transparent;
    border-color: var(--color-matrix-green);
    color: var(--color-matrix-green);
}

.btn-feedback:hover {
    background: var(--color-matrix-green);
    color: var(--color-black);
}

/* ============================================
   Disclaimer Section
   ============================================ */
.disclaimer {
    padding: var(--spacing-xl) 0;
    background: var(--color-dark-gray);
}

.disclaimer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.disclaimer-item {
    background: var(--color-black);
    border: 1px solid var(--color-warning-red);
    padding: var(--spacing-md);
}

.disclaimer-item h3 {
    color: var(--color-warning-red);
    margin-bottom: var(--spacing-sm);
    font-size: 1.2rem;
}

.disclaimer-item p {
    color: var(--color-text-gray);
    line-height: 1.6;
}

.disclaimer-note {
    text-align: center;
    color: var(--color-text-gray);
    margin-top: var(--spacing-md);
}

.disclaimer-link {
    color: var(--color-matrix-green);
    text-decoration: none;
    border-bottom: 1px solid var(--color-matrix-green);
}

.disclaimer-link:hover {
    color: var(--color-text-white);
    border-bottom-color: var(--color-text-white);
}

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

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.about-description {
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    font-size: 1.1rem;
}

.about-description strong {
    color: var(--color-matrix-green);
}

.about-mission {
    background: var(--color-dark-gray);
    border: 1px solid var(--color-matrix-green);
    padding: var(--spacing-md);
}

.mission-title {
    font-size: 1.5rem;
    color: var(--color-matrix-green);
    margin-bottom: var(--spacing-sm);
}

.mission-list {
    list-style: none;
    padding: 0;
}

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

.mission-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-matrix-green);
    font-weight: bold;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-dark-gray);
    border-top: 1px solid var(--color-matrix-green);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-matrix-green);
}

.footer-tagline {
    color: var(--color-text-gray);
    font-size: 0.9rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.footer-heading {
    color: var(--color-matrix-green);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.footer-list {
    list-style: none;
    padding: 0;
}

.footer-list li {
    margin-bottom: 0.5rem;
}

.footer-list a {
    color: var(--color-text-gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-list a:hover {
    color: var(--color-matrix-green);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-light-gray);
    color: var(--color-text-gray);
}

.footer-made {
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .title-main {
        font-size: 2.5rem;
    }
    
    .title-sub {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .nav {
        display: none;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .version-info {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .version-badge {
        font-size: 1.3rem;
        min-width: auto;
    }
    
    .version-details {
        grid-template-columns: 1fr;
    }
    
    .disclaimer-content {
        grid-template-columns: 1fr;
    }
    
    .download-box {
        padding: var(--spacing-sm);
    }
    
    .warning-banner {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .install-steps {
        padding: var(--spacing-sm);
    }
    
    .steps-list li {
        padding-left: 2rem;
        font-size: 0.85rem;
    }
    
    .steps-list li::before {
        width: 1.5rem;
        height: 1.5rem;
        font-size: 0.8rem;
    }
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease-out;
}

/* ============================================
   Scroll Animations
   ============================================ */
.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease-out;
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}