/* ============================================
   NectarView Landing Page - Dark Theme
   Color palette derived from app icon:
   - Background: #0d0d0d / #141418
   - Surface: #1a1a22 / #22222e
   - Accent (gold): #C5CF3A
   - Text: #e8e8e8 / #a0a0a8
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    line-height: 1.6;
    color: #e0e0e0;
    background-color: #0d0d0d;
    -webkit-font-smoothing: antialiased;
}

a {
    color: #C5CF3A;
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: #d8e04a;
}

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

/* --- Layout --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Navigation --- */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(13, 13, 13, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(197, 207, 58, 0.1);
    padding: 0 24px;
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.1rem;
    color: #fff;
    text-decoration: none;
}

.nav-brand img {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    color: #a0a0a8;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: #C5CF3A;
}

.lang-switch {
    display: flex;
    gap: 4px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    padding: 2px;
}

.lang-btn {
    background: none;
    border: none;
    color: #808088;
    font-size: 0.8rem;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.lang-btn.active {
    background: rgba(197, 207, 58, 0.15);
    color: #C5CF3A;
}

/* --- Hero --- */
.hero {
    padding: 140px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(197, 207, 58, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-icon {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    margin-bottom: 32px;
    filter: drop-shadow(0 0 40px rgba(197, 207, 58, 0.3));
    animation: iconGlow 4s ease-in-out infinite alternate;
}

@keyframes iconGlow {
    0% { filter: drop-shadow(0 0 30px rgba(197, 207, 58, 0.2)); }
    100% { filter: drop-shadow(0 0 50px rgba(197, 207, 58, 0.4)); }
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.hero .tagline {
    font-size: 1.3rem;
    color: #C5CF3A;
    font-weight: 500;
    margin-bottom: 20px;
}

.hero .description {
    font-size: 1.05rem;
    color: #a0a0a8;
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.25s;
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: #C5CF3A;
    color: #0d0d0d;
}

.btn-primary:hover {
    background: #d8e04a;
    color: #0d0d0d;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(197, 207, 58, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: #e0e0e0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    transform: translateY(-2px);
}

/* --- Hero Screenshot --- */
.hero-screenshot {
    margin-top: 60px;
    position: relative;
}

.hero-screenshot img {
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    max-width: 900px;
    width: 100%;
}

/* --- Hero Video --- */
.hero-video {
    margin-top: 60px;
    position: relative;
    width: 100%;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.hero-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.hero-video.playing {
    aspect-ratio: 16 / 9;
}

.video-thumbnail {
    display: block;
    position: relative;
    cursor: pointer;
}

.video-thumbnail img {
    display: block;
    width: 100%;
    border-radius: 12px;
    transition: filter 0.3s;
}

.video-thumbnail:hover img {
    filter: brightness(0.75);
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.85;
    transition: opacity 0.3s, transform 0.3s;
}

.video-thumbnail:hover .video-play-btn {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

/* --- Sections --- */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.section-header p {
    color: #a0a0a8;
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

/* --- Feature Rows --- */
.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.feature-row.reverse .feature-image {
    order: -1;
}

.feature-text h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

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

.feature-text li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 12px;
    color: #b0b0b8;
    font-size: 0.95rem;
}

.feature-text li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: #C5CF3A;
    border-radius: 50%;
}

.feature-image img {
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s;
}

.feature-image img:hover {
    transform: scale(1.02);
}

/* --- Format Grid --- */
.format-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.format-card {
    background: #1a1a22;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 28px;
    text-align: center;
    transition: all 0.25s;
}

.format-card:hover {
    border-color: rgba(197, 207, 58, 0.3);
    transform: translateY(-4px);
}

.format-card .format-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    color: #C5CF3A;
}

.format-card h4 {
    font-size: 1rem;
    color: #fff;
    margin-bottom: 8px;
}

.format-card p {
    color: #808088;
    font-size: 0.85rem;
}

/* --- CTA --- */
.cta-section {
    text-align: center;
    padding: 80px 0;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.cta-section p {
    color: #a0a0a8;
    margin-bottom: 32px;
    font-size: 1.05rem;
}

/* --- Footer --- */
.site-footer {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 32px 0;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.footer-links a {
    color: #808088;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: #C5CF3A;
}

.footer-copyright {
    color: #555;
    font-size: 0.85rem;
}

/* --- Scroll Animation --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Subpage Styles --- */
.subpage {
    padding-top: 100px;
    padding-bottom: 60px;
    min-height: 100vh;
}

.subpage h1 {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.subpage .subtitle {
    color: #808088;
    font-size: 0.9rem;
    margin-bottom: 40px;
}

.content-card {
    background: #1a1a22;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 28px 32px;
    margin-bottom: 24px;
}

.content-card h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.content-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #d0d0d0;
    margin-bottom: 8px;
    margin-top: 20px;
}

.content-card p {
    color: #a0a0a8;
    margin-bottom: 12px;
}

.content-card ul, .content-card ol {
    color: #a0a0a8;
    padding-left: 24px;
    margin-bottom: 12px;
}

.content-card li {
    margin-bottom: 8px;
}

.content-card strong {
    color: #d0d0d0;
}

.content-card code {
    background: rgba(197, 207, 58, 0.1);
    color: #C5CF3A;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.9em;
}

.content-card table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
}

.content-card th {
    text-align: left;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.04);
    color: #C5CF3A;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.content-card td {
    padding: 10px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    color: #a0a0a8;
}

/* --- Contact-specific --- */
.email-box {
    background: rgba(197, 207, 58, 0.06);
    border: 1px solid rgba(197, 207, 58, 0.2);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    margin-bottom: 24px;
}

.email-box h2 {
    border: none;
    padding-bottom: 0;
}

.email-address {
    display: inline-block;
    background: rgba(197, 207, 58, 0.1);
    color: #C5CF3A;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 8px;
}

.email-address a {
    color: #C5CF3A;
}

/* --- Back Link --- */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 32px;
    color: #808088;
    font-size: 0.9rem;
}

.back-link:hover {
    color: #C5CF3A;
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .format-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 120px 0 60px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero .tagline {
        font-size: 1.1rem;
    }

    .feature-row {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .format-grid {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
    }

    .section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.6rem;
    }

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

    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* --- Bilingual toggle --- */
/* English shown by default; JS switches to JA if needed */
.ja {
    display: none;
}