:root {
    --font-base: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
    --font-heading: 'Poppins', 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
    --color-hero-center: #7ca8ff;
    --color-hero-mid: rgba(124, 168, 255, 0.8);
    --color-hero-edge: rgba(60, 76, 255, 0.8);
    --color-surface: #f7f9ff;
    --color-text: #1f2950;
    --color-muted: #45537a;
    --color-footer: #b0c3ff;
    --shadow-elevated: 0 15px 40px rgba(0, 0, 0, 0.12);
    --radius-xl: 28px;
    --spacing-section: clamp(3rem, 5vw, 5.5rem);
    --transition-base: 220ms ease;
}

* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    font-family: var(--font-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: #040c2c;
    min-height: 100vh;
}

.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: radial-gradient(circle at center, var(--color-hero-center) 0%, var(--color-hero-mid) 45%, var(--color-hero-edge) 100%);
}

.skip-link {
    position: absolute;
    top: 0.75rem;
    left: 50%;
    transform: translate(-50%, -120%);
    padding: 0.75rem 1.5rem;
    border-radius: 999px;
    background: #ffffff;
    color: #1a2d66;
    font-family: var(--font-heading);
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 12px 28px rgba(7, 24, 84, 0.35);
    transition: transform var(--transition-base), opacity var(--transition-base);
    opacity: 0;
    z-index: 1000;
}

.skip-link:focus {
    transform: translate(-50%, 0);
    opacity: 1;
}

.container {
    width: min(1100px, 92vw);
    margin: 0 auto;
}

.hero {
    position: relative;
    padding: clamp(4rem, 9vw, 7rem) 0 clamp(3.5rem, 7vw, 6rem);
    text-align: center;
    overflow: hidden;
    color: #ffffff;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.35) 0%, rgba(124, 168, 255, 0) 60%),
                radial-gradient(circle at top right, rgba(255, 255, 255, 0.25) 0%, rgba(124, 168, 255, 0) 65%),
                radial-gradient(circle at bottom left, rgba(48, 74, 195, 0.3) 0%, rgba(48, 74, 195, 0) 70%);
    z-index: 0;
}

.hero__bokeh {
    position: absolute;
    width: clamp(10rem, 22vw, 16rem);
    height: clamp(10rem, 22vw, 16rem);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    filter: blur(0.6rem);
    z-index: 0;
}

.hero__bokeh--one { top: 12%; left: 15%; }
.hero__bokeh--two { top: 45%; right: 10%; }
.hero__bokeh--three { bottom: 6%; left: 55%; }

.hero__content {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 1.5rem;
    justify-items: center;
}

.hero__eyebrow {
    margin: 0;
    font-family: var(--font-heading);
    letter-spacing: 0.22em;
    text-transform: uppercase;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
}

.hero__title {
    margin: 0;
    font-family: var(--font-heading);
    font-size: clamp(2.6rem, 6vw, 3.8rem);
    font-weight: 700;
}

.hero__subtitle {
    margin: 0;
    font-size: clamp(1.05rem, 2.7vw, 1.45rem);
    color: rgba(255, 255, 255, 0.92);
    max-width: 40ch;
}

.main {
    flex: 1;
    background: linear-gradient(180deg, rgba(7, 18, 64, 0.18) 0%, rgba(4, 12, 44, 0.65) 100%);
    padding-bottom: var(--spacing-section);
}

.cards {
    padding-top: var(--spacing-section);
}

.section-title {
    margin: 0 0 clamp(2rem, 5vw, 3rem);
    text-align: center;
    font-family: var(--font-heading);
    font-size: clamp(1.9rem, 4vw, 2.5rem);
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
}

.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(1.75rem, 4vw, 2.75rem);
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: clamp(2.3rem, 4vw, 2.9rem);
    box-shadow: var(--shadow-elevated);
    display: flex;
    flex-direction: column;
    gap: 1.6rem;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card__icon {
    width: 3.6rem;
    height: 3.6rem;
    color: var(--card-accent, #6faaff);
}

.card__icon svg {
    width: 100%;
    height: 100%;
}

.card__title {
    margin: 0;
    font-family: var(--font-heading);
    font-size: 1.7rem;
    font-weight: 600;
    color: var(--card-accent, #6faaff);
}

.card__body {
    margin: 0;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-muted);
}

.btn {
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.78rem 1.85rem;
    border-radius: 999px;
    font-family: var(--font-heading);
    font-weight: 600;
    text-decoration: none;
    color: #ffffff;
    background: linear-gradient(135deg, var(--btn-gradient-start), var(--btn-gradient-end));
    box-shadow: 0 12px 30px rgba(55, 90, 210, 0.28);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.btn:hover,
.btn:focus-visible {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(40, 72, 205, 0.28);
}

.btn:focus-visible {
    outline: 3px solid rgba(255, 255, 255, 0.85);
    outline-offset: 3px;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 24px 60px rgba(6, 35, 120, 0.2);
}

.card:focus-within {
    box-shadow: 0 26px 65px rgba(6, 35, 120, 0.22);
}

.card--kurashi {
    --card-accent: #6faaff;
    --btn-gradient-start: #6faaff;
    --btn-gradient-end: #82c4ff;
}

.card--jidouka {
    --card-accent: #4f88ff;
    --btn-gradient-start: #4f88ff;
    --btn-gradient-end: #6faaff;
}

.card--rlc {
    --card-accent: #3a6cff;
    --btn-gradient-start: #3a6cff;
    --btn-gradient-end: #557aff;
}

.footer {
    padding: 2.5rem 0 3rem;
    text-align: center;
}

.footer__note {
    color: var(--color-footer);
    font-size: 0.85rem;
}

@media (min-width: 768px) {
    .card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1024px) {
    .card-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 1ms !important;
        scroll-behavior: auto !important;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-surface: rgba(14, 24, 70, 0.95);
        --color-text: #eaf0ff;
        --color-muted: #c7d6ff;
        --color-footer: #c7d8ff;
    }

    body {
        background-color: #02071b;
        color: var(--color-text);
    }

    .btn {
        box-shadow: 0 14px 32px rgba(25, 70, 210, 0.35);
    }
}