/* 東京IT LP — デザインシステム */
:root {
    --color-bg: #06080f;
    --color-bg-elevated: #0f1420;
    --color-surface: #ffffff;
    --color-surface-muted: #f4f6fb;
    --color-text: #0f172a;
    --color-text-muted: #64748b;
    --color-text-on-dark: #e2e8f0;
    --color-text-muted-on-dark: #94a3b8;
    --color-accent: #06b6d4;
    --color-accent-2: #6366f1;
    --color-accent-glow: rgba(6, 182, 212, 0.35);
    --color-cta: #10b981;
    --color-cta-hover: #059669;
    --color-border: rgba(15, 23, 42, 0.08);
    --color-border-dark: rgba(148, 163, 184, 0.15);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 999px;
    --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
    --shadow-card-hover: 0 20px 48px rgba(15, 23, 42, 0.12);
    --shadow-glow: 0 0 60px var(--color-accent-glow);
    --font-sans: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic UI', system-ui, sans-serif;
    --header-height: 72px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-surface);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* —— ヘッダー —— */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    display: flex;
    align-items: center;
    background: transparent;
    transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

.site-header.is-scrolled {
    background: rgba(6, 8, 15, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 var(--color-border-dark);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: #fff;
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.02em;
}

.site-logo__mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
    color: #fff;
    box-shadow: 0 4px 16px var(--color-accent-glow);
}

.site-nav {
    display: none;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

@media (min-width: 992px) {
    .site-nav {
        display: flex;
    }
}

.site-nav a {
    color: var(--color-text-muted-on-dark);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-pill);
    transition: color var(--transition), background var(--transition);
}

.site-nav a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
}

.btn-nav-cta {
    display: none;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1.25rem;
    background: linear-gradient(135deg, var(--color-cta), var(--color-cta-hover));
    color: #fff !important;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-pill);
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.35);
    transition: transform var(--transition), box-shadow var(--transition);
}

.btn-nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 28px rgba(16, 185, 129, 0.45);
    color: #fff !important;
}

@media (min-width: 992px) {
    .btn-nav-cta {
        display: inline-flex;
    }
}

/* —— ヒーロー —— */
.hero-section {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    padding: calc(var(--header-height) + 3rem) 0 5rem;
    background: var(--color-bg);
    color: #fff;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 40%, rgba(6, 182, 212, 0.18) 0%, transparent 55%),
        radial-gradient(ellipse 60% 50% at 80% 20%, rgba(99, 102, 241, 0.2) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 60% 90%, rgba(16, 185, 129, 0.1) 0%, transparent 45%);
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(148, 163, 184, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.04) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 20%, transparent 75%);
    pointer-events: none;
}

.hero-bg-image {
    position: absolute;
    inset: 0;
    background: url('../img/main.png') center / cover no-repeat;
    opacity: 0.07;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem 0.4rem 0.5rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
    backdrop-filter: blur(8px);
}

.hero-badge__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-cta);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.8);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.9); }
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-bottom: 1.25rem;
}

.hero-title .gradient-text {
    background: linear-gradient(135deg, #fff 30%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-lead {
    font-size: 1.1rem;
    color: var(--color-text-on-dark);
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--color-text-muted-on-dark);
    max-width: 640px;
    margin: 0 auto 2.5rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.btn-hero-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 1.75rem;
    background: #fff;
    color: var(--color-bg);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-pill);
    text-decoration: none;
    transition: transform var(--transition), box-shadow var(--transition);
    border: none;
}

.btn-hero-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(255, 255, 255, 0.2);
    color: var(--color-bg);
}

.btn-hero-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 1.75rem;
    background: transparent;
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-pill);
    text-decoration: none;
    border: 1px solid var(--color-border-dark);
    transition: background var(--transition), border-color var(--transition);
}

.btn-hero-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.3);
    color: #fff;
}

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
    margin-top: 4rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--color-border-dark);
}

.hero-stat {
    text-align: center;
}

.hero-stat__value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-accent);
    display: block;
}

.hero-stat__label {
    font-size: 0.8rem;
    color: var(--color-text-muted-on-dark);
    margin-top: 0.25rem;
}

/* —— セクション共通 —— */
.section {
    padding: 5.5rem 0;
}

.section--muted {
    background: var(--color-surface-muted);
}

.section--dark {
    background: var(--color-bg-elevated);
    color: var(--color-text-on-dark);
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 3.5rem;
}

.section-eyebrow {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.section--dark .section-eyebrow {
    color: var(--color-accent);
}

.section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.25rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.section--dark .section-title {
    color: #fff;
}

.section-desc {
    color: var(--color-text-muted);
    font-size: 1.05rem;
    margin: 0;
}

.section--dark .section-desc {
    color: var(--color-text-muted-on-dark);
}

/* —— 機能カード —— */
.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .feature-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem 1.75rem;
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(6, 182, 212, 0.25);
}

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 1.25rem;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(99, 102, 241, 0.15));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-accent-2);
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.feature-card p {
    font-size: 0.925rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* —— デモ / SaaS カード —— */
.card-grid {
    display: grid;
    gap: 1.75rem;
}

.card-grid--2 {
    grid-template-columns: 1fr;
}

@media (min-width: 992px) {
    .card-grid--2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

.card-grid--3 {
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .card-grid--3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1200px) {
    .card-grid--3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

.demo-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform var(--transition), box-shadow var(--transition);
}

.demo-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
}

.demo-card__media {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 10;
    background: var(--color-surface-muted);
}

.demo-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.demo-card:hover .demo-screenshot {
    transform: scale(1.04);
}

.demo-screenshot-contain {
    object-fit: contain;
    padding: 0.5rem;
}

.demo-card__body {
    padding: 1.75rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.demo-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-pill);
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.12), rgba(99, 102, 241, 0.12));
    color: var(--color-accent-2);
    margin-bottom: 0.85rem;
    width: fit-content;
}

.demo-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.demo-card .card-text {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.demo-card ul {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem;
    flex: 1;
}

.demo-card ul li {
    font-size: 0.875rem;
    color: var(--color-text);
    padding: 0.35rem 0;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.demo-card ul li i {
    color: var(--color-cta);
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.btn-primary-custom {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.85rem 1.5rem;
    background: linear-gradient(135deg, var(--color-cta), var(--color-cta-hover));
    color: #fff !important;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    border-radius: var(--radius-pill);
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
    transition: transform var(--transition), box-shadow var(--transition);
    cursor: pointer;
}

.btn-primary-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(16, 185, 129, 0.4);
    color: #fff !important;
}

.info-callout {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.08), rgba(99, 102, 241, 0.08));
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    color: var(--color-text);
}

.info-callout i {
    font-size: 1.25rem;
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 0.1rem;
}

/* —— 会社情報 —— */
.company-info {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-card);
}

.company-info h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.company-info h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.company-info p {
    color: var(--color-text-muted);
}

.company-info ul li {
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.btn-outline-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--color-accent-2);
    color: var(--color-accent-2);
    font-weight: 600;
    border-radius: var(--radius-pill);
    text-decoration: none;
    transition: background var(--transition), color var(--transition);
}

.btn-outline-brand:hover {
    background: var(--color-accent-2);
    color: #fff;
}

/* —— お問い合わせ —— */
.contact-section {
    background: var(--color-bg);
    color: var(--color-text-on-dark);
}

.contact-section .section-eyebrow,
.contact-section .section-title {
    color: #fff;
}

.contact-section .section-desc {
    color: var(--color-text-muted-on-dark);
}

.contact-form {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    backdrop-filter: blur(8px);
}

.contact-form .form-label {
    color: var(--color-text-on-dark);
    font-size: 0.9rem;
}

.contact-form .form-control {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--color-border-dark);
    color: #fff;
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
}

.contact-form .form-control:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--color-accent);
    color: #fff;
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
}

.contact-form .form-control::placeholder {
    color: rgba(148, 163, 184, 0.6);
}

.contact-section .alert-success {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.3);
    color: #a7f3d0;
}

.contact-section .alert-danger {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: #fecaca;
}

/* —— フッター —— */
.site-footer {
    background: #030508;
    color: var(--color-text-muted-on-dark);
    padding: 2rem 0;
    border-top: 1px solid var(--color-border-dark);
}

.site-footer a {
    color: var(--color-text-on-dark);
    text-decoration: none;
    transition: color var(--transition);
}

.site-footer a:hover {
    color: var(--color-accent);
}

.site-footer__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.site-footer p {
    margin: 0;
    font-size: 0.875rem;
}

/* —— モバイルナビ —— */
.nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 1.25rem;
    cursor: pointer;
}

@media (min-width: 992px) {
    .nav-toggle {
        display: none;
    }
}

.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(6, 8, 15, 0.98);
    backdrop-filter: blur(16px);
    padding: 1rem;
    border-bottom: 1px solid var(--color-border-dark);
    z-index: 999;
}

.mobile-nav.is-open {
    display: block;
}

.mobile-nav a {
    display: block;
    padding: 0.85rem 1rem;
    color: var(--color-text-on-dark);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.mobile-nav a:hover {
    background: rgba(255, 255, 255, 0.06);
}

.mobile-nav .btn-nav-cta {
    display: flex;
    justify-content: center;
    margin-top: 0.5rem;
    width: 100%;
}

/* —— サンクスページ —— */
.page-thanks {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.page-thanks::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 70% 50% at 30% 30%, rgba(6, 182, 212, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 80% 70%, rgba(99, 102, 241, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.thanks-card {
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-lg);
    padding: 3rem 2.5rem;
    max-width: 560px;
    width: 100%;
    text-align: center;
    backdrop-filter: blur(12px);
    color: var(--color-text-on-dark);
}

.thanks-card h1 {
    font-size: clamp(1.5rem, 4vw, 1.85rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 1rem;
}

.thanks-card .lead {
    color: var(--color-text-muted-on-dark);
    font-size: 1rem;
}

.success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-cta), var(--color-cta-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 32px rgba(16, 185, 129, 0.4);
    animation: scaleIn 0.5s ease-out;
}

.success-icon i {
    font-size: 2.25rem;
    color: #fff;
}

@keyframes scaleIn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.thanks-card .alert-info {
    background: rgba(6, 182, 212, 0.12);
    border-color: rgba(6, 182, 212, 0.25);
    color: var(--color-text-on-dark);
    text-align: left;
    font-size: 0.9rem;
}

.thanks-card a:not(.btn-primary-custom) {
    color: var(--color-accent);
}

.thanks-card small {
    color: var(--color-text-muted-on-dark);
}

.btn-primary-custom--inline {
    width: auto;
    display: inline-flex;
    padding-left: 2rem;
    padding-right: 2rem;
}