/* ============================================
   DALI SECURITY — Refined Dark Theme
   ============================================ */

:root {
    --bg-primary: #1a2030;
    --bg-secondary: #1e2538;
    --bg-card: #232b3e;
    --bg-card-hover: #2a3348;

    --accent: #d42255;
    --accent-dim: rgba(212, 34, 85, 0.1);

    --text-primary: #f2f4f7;
    --text-secondary: #adb5c2;
    --text-muted: #8e99ac;

    --section-padding: 120px 0;
    --container-width: 1200px;

    --font-body: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Courier New', monospace;

    --border-color: rgba(255,255,255,0.09);
    --border-hover: rgba(255,255,255,0.16);
}

/* ============================================
   RESET & BASE
   ============================================ */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: #3e4c62 var(--bg-primary);
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar {
    width: 5px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: #3e4c62;
    border-radius: 3px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

/* ============================================
   CONTAINER
   ============================================ */

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-accent {
    color: var(--accent);
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 72px;
}

.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.03em;
    margin-bottom: 18px;
    color: var(--text-primary);
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.35s ease;
    background: transparent;
}

.nav.scrolled {
    background: rgba(26, 32, 48, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
}

.nav-logo-text {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--text-primary);
}

.nav-logo-sep {
    width: 1px;
    height: 16px;
    background: var(--border-color);
}

.nav-logo-sub {
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.82rem;
    font-weight: 400;
    color: var(--text-secondary);
    letter-spacing: 0.01em;
    transition: color 0.25s ease;
}

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

.nav-link--cta {
    color: #fff;
    background: var(--accent);
    padding: 8px 20px;
    border-radius: 4px;
    font-weight: 500;
    transition: all 0.25s ease;
}

.nav-link--cta:hover {
    background: #b81d49;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 8px;
    padding-left: 16px;
    border-left: 1px solid var(--border-color);
}

.lang-switch a {
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    color: var(--text-muted);
    padding: 3px 6px;
    border-radius: 3px;
    transition: all 0.25s ease;
}

.lang-switch a:hover {
    color: var(--text-primary);
}

.lang-switch a.active {
    color: var(--text-primary);
    background: rgba(255,255,255,0.08);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 22px;
    height: 1.5px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* ============================================
   HERO
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 140px 24px 100px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse 60% 50% at 50% 40%, rgba(212, 34, 85, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    max-width: 820px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--accent-dim);
    border: 1px solid rgba(212, 34, 85, 0.2);
    border-radius: 100px;
    margin-bottom: 36px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.35; }
}

.badge-text {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.15em;
}

.hero-title {
    font-weight: 600;
    line-height: 1.12;
    margin-bottom: 24px;
    letter-spacing: -0.035em;
}

.hero-line {
    display: block;
}

.hero-line--1 {
    font-size: clamp(2.4rem, 6vw, 4.2rem);
    color: var(--text-secondary);
    font-weight: 400;
}

.hero-line--2 {
    font-size: clamp(2.8rem, 7vw, 5rem);
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 36px;
    line-height: 1.75;
    font-weight: 300;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 56px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 28px;
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 500;
    letter-spacing: 0;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.25s ease;
}

.btn--primary {
    background: var(--accent);
    color: #fff;
}

.btn--primary:hover {
    background: #b81d49;
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(212, 34, 85, 0.25);
}

.btn--ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-hover);
}

.btn--ghost:hover {
    border-color: rgba(255,255,255,0.2);
    color: var(--text-primary);
}

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

.btn-icon {
    transition: transform 0.25s ease;
}

.btn:hover .btn-icon {
    transform: translateX(3px);
}

/* Terminal */
.hero-terminal {
    max-width: 560px;
    margin: 0 auto;
    text-align: left;
    background: rgba(35, 43, 62, 0.7);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    backdrop-filter: blur(8px);
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: rgba(30, 37, 56, 0.9);
    border-bottom: 1px solid var(--border-color);
}

.terminal-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #3e4c62;
}

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-left: 8px;
}

.terminal-body {
    padding: 14px 16px;
    min-height: 44px;
}

.terminal-line {
    display: flex;
    align-items: center;
    gap: 8px;
}

.terminal-prompt {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent);
}

.terminal-cmd {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.terminal-cursor {
    display: inline-block;
    width: 7px;
    height: 14px;
    background: var(--text-muted);
    animation: cursorBlink 1s step-end infinite;
}

@keyframes cursorBlink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ============================================
   SERVICES
   ============================================ */

.services {
    padding: var(--section-padding);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.service-card {
    padding: 44px 36px;
    background: var(--bg-card);
    transition: background 0.3s ease;
}

.service-card:hover {
    background: var(--bg-card-hover);
}

.service-number {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.15em;
    margin-bottom: 16px;
}

.service-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.service-desc {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 22px;
}

.service-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.service-features li {
    font-size: 0.88rem;
    color: var(--text-secondary);
    padding-left: 14px;
    position: relative;
    line-height: 1.5;
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 4px;
    height: 1.5px;
    background: #e8627f;
}

/* ============================================
   ABOUT
   ============================================ */

.about {
    padding: var(--section-padding);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-content .section-title {
    text-align: left;
}

.about-text {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 18px;
}

.about-values {
    margin-top: 36px;
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.value-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.value-marker {
    width: 3px;
    height: 36px;
    background: var(--accent);
    border-radius: 2px;
    margin-top: 2px;
    flex-shrink: 0;
}

.value-item h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 3px;
    letter-spacing: -0.01em;
}

.value-item p {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.about-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.about-logo {
    width: 280px;
    height: auto;
    opacity: 0.85;
}

/* ============================================
   FEATURES
   ============================================ */

.features {
    padding: var(--section-padding);
    position: relative;
    background: var(--bg-secondary);
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.feature-item {
    padding: 36px 30px;
    background: var(--bg-card);
    transition: background 0.3s ease;
}

.feature-item:hover {
    background: var(--bg-card-hover);
}

.feature-num {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: #e8627f;
    letter-spacing: 0.15em;
    margin-bottom: 18px;
}

.feature-item h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.feature-item p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   STATS
   ============================================ */

.stats {
    padding: 80px 0;
    position: relative;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
}

.stat-card {
    text-align: center;
    padding: 40px 20px;
    position: relative;
}

.stat-card::after {
    content: '';
    position: absolute;
    right: 0;
    top: 25%;
    height: 50%;
    width: 1px;
    background: var(--border-color);
}

.stat-card:last-child::after {
    display: none;
}

.stat-value {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-primary);
    display: inline;
    line-height: 1;
    letter-spacing: -0.03em;
}

.stat-unit {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
    display: inline;
    margin-left: 3px;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 10px;
    letter-spacing: 0.04em;
}

/* ============================================
   CONTACT
   ============================================ */

.contact {
    padding: var(--section-padding);
    position: relative;
    background: var(--bg-secondary);
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-content .section-title {
    text-align: left;
}

.contact-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.contact-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.contact-value {
    font-size: 0.95rem;
    color: var(--text-primary);
}

a.contact-value:hover {
    color: var(--accent);
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.form-input {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 11px 14px;
    font-family: var(--font-body);
    font-size: 0.92rem;
    color: var(--text-primary);
    transition: border-color 0.25s ease;
    outline: none;
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:focus {
    border-color: var(--accent);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    padding: 56px 0 28px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 52px;
}

.footer-tagline {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 14px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.footer-links h4 {
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.footer-links a {
    font-size: 0.88rem;
    color: var(--text-secondary);
    transition: color 0.25s ease;
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

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

.footer-legal {
    display: flex;
    gap: 20px;
}

.footer-legal a {
    font-size: 0.82rem;
    color: var(--text-secondary);
    transition: color 0.25s ease;
}

.footer-legal a:hover {
    color: var(--text-primary);
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: all 0.25s ease;
}

.social-link:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background: rgba(255,255,255,0.05);
}

/* ============================================
   ANIMATIONS — Scroll Reveal
   ============================================ */

.service-card,
.feature-item,
.stat-card,
.about-content,
.about-visual,
.contact-content,
.contact-form-wrapper {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.service-card.visible,
.feature-item.visible,
.stat-card.visible,
.about-content.visible,
.about-visual.visible,
.contact-content.visible,
.contact-form-wrapper.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-card:nth-child(2),
.feature-item:nth-child(2),
.stat-card:nth-child(2) {
    transition-delay: 0.08s;
}

.service-card:nth-child(3),
.feature-item:nth-child(3),
.stat-card:nth-child(3) {
    transition-delay: 0.16s;
}

.service-card:nth-child(4),
.feature-item:nth-child(4),
.stat-card:nth-child(4) {
    transition-delay: 0.24s;
}

.feature-item:nth-child(5) {
    transition-delay: 0.32s;
}

.feature-item:nth-child(6) {
    transition-delay: 0.4s;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-visual {
        order: -1;
    }

    .about-logo {
        width: 200px;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-card:nth-child(2)::after {
        display: none;
    }

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

@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(26, 32, 48, 0.96);
        backdrop-filter: blur(16px);
        padding: 20px 24px;
        gap: 14px;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 110px 24px 60px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-terminal {
        display: none;
    }

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

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0;
    }

    .stat-card::after {
        display: none;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 14px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .service-card {
        padding: 28px 22px;
    }

    .feature-item {
        padding: 26px 20px;
    }

    .stat-value {
        font-size: 2rem;
    }
}