@charset "UTF-8";

/* ==========================================================================
   1. Design Tokens (from MIRAINA_site_design_rules.md)
   ========================================================================== */
:root {
    /* Base Colors */
    --bg-base: #FFFDFC;
    --bg-soft-pink: #FBECEF;
    --bg-soft-peach: #F8E3D9;
    --bg-section: #FFF7F8;

    /* Accent Colors */
    --accent-pink: #D62F74;
    --accent-rose: #F06292;
    --accent-orange: #FF7A00;
    --accent-coral: #FF8E6B;

    /* Text Colors */
    --text-main: #3A241C;
    --text-sub: #6F5A52;
    --text-light: #8F7A73;
    --text-on-accent: #FFFFFF;

    /* Utility Colors */
    --line-soft: #F1D5DA;
    --icon-accent: #E27A57;
    --success-soft: #F56D5E;

    /* Gradients */
    --gradient-brand: linear-gradient(90deg, #D62F74 0%, #F05A7E 40%, #FF7A00 100%);
    --gradient-cta: linear-gradient(90deg, #FF7A00 0%, #F25486 55%, #D62F74 100%);
    --gradient-soft: linear-gradient(135deg, rgba(248, 210, 220, 0.55) 0%, rgba(255, 214, 188, 0.45) 100%);

    /* Radius */
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 32px;
    --radius-pill: 9999px;

    /* Shadows */
    --shadow-soft: 0 8px 24px rgba(214, 47, 116, 0.12);
    --shadow-cta: 0 8px 24px rgba(214, 47, 116, 0.18);

    /* Typography */
    --font-main: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
    --font-size-base: 16px;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.5rem;

    /* Layout */
    --container: 1200px;
    --header-height: 80px;
    --section-space-pc: 120px;
    --section-space-sp: 72px;

    /* Transitions */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --transition-fast: 200ms var(--ease-out);
    --transition-normal: 280ms var(--ease-out);
    --transition-slow: 600ms var(--ease-out);
}

/* ==========================================================================
   2. Base Styles
   ========================================================================== */
html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--text-main);
    background-color: var(--bg-base);
    line-height: 1.8;
    letter-spacing: 0.04em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-main);
    color: var(--text-main);
    line-height: 1.3;
    font-weight: 700;
}

a {
    color: inherit;
    transition: color var(--transition-fast);
}

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

/* ==========================================================================
   3. Utilities
   ========================================================================== */
.bdx-container {
    width: 90%;
    max-width: var(--container);
    margin: 0 auto;
}

.bdx-section {
    padding-top: var(--section-space-sp);
    padding-bottom: var(--section-space-sp);
}

@media (min-width: 768px) {
    .bdx-section {
        padding-top: var(--section-space-pc);
        padding-bottom: var(--section-space-pc);
    }
}

.bdx-text-center { text-align: center; }

.bdx-text-gradient {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Visually Hidden (for SEO / Accessibility) */
.bdx-visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Fade In */
.bdx-fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.bdx-fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Section Header */
.bdx-section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.bdx-section-label {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent-pink);
    margin-bottom: 0.75rem;
}

.bdx-section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (min-width: 768px) {
    .bdx-section-title {
        font-size: var(--font-size-4xl);
    }
}

.bdx-section-desc {
    font-size: var(--font-size-lg);
    color: var(--text-sub);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.9;
}

/* ==========================================================================
   4. Buttons
   ========================================================================== */
.bdx-btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    background: var(--gradient-cta);
    color: var(--text-on-accent);
    font-family: var(--font-main);
    font-size: var(--font-size-md);
    font-weight: 700;
    border: none;
    border-radius: var(--radius-pill);
    box-shadow: var(--shadow-cta);
    cursor: pointer;
    text-decoration: none;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    min-height: 56px;
}

.bdx-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(214, 47, 116, 0.25);
}

.bdx-btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: transparent;
    color: var(--accent-pink);
    font-family: var(--font-main);
    font-size: var(--font-size-sm);
    font-weight: 700;
    border: 2px solid var(--accent-pink);
    border-radius: var(--radius-pill);
    cursor: pointer;
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.bdx-btn-secondary:hover {
    background: var(--accent-pink);
    color: var(--text-on-accent);
}

/* Link with arrow */
.bdx-link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--accent-pink);
    text-decoration: none;
    transition: gap var(--transition-fast);
}
.bdx-link-arrow::after {
    content: '→';
    transition: transform var(--transition-fast);
}
.bdx-link-arrow:hover::after {
    transform: translateX(4px);
}

/* ==========================================================================
   5. Header
   ========================================================================== */
.bdx-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(255, 253, 252, 0.96);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.bdx-header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.bdx-header-logo img {
    height: 48px;
    width: auto;
}

@media (min-width: 768px) {
    .bdx-header-logo img {
        height: 100px;
    }
}

/* Desktop Nav */
.bdx-header-nav {
    display: none;
}

@media (min-width: 1024px) {
    .bdx-header-nav {
        display: flex;
        align-items: center;
        gap: 1.75rem;
    }

    .bdx-nav-item {
        position: relative;
        padding: 1rem 0;
    }

    .bdx-nav-link {
        font-size: var(--font-size-sm);
        font-weight: 500;
        color: var(--text-main);
        text-decoration: none;
        transition: color var(--transition-fast);
    }

    .bdx-nav-link:hover {
        color: var(--accent-pink);
    }

    /* Dropdown */
    .bdx-has-dropdown:hover .bdx-dropdown {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .bdx-dropdown {
        position: absolute;
        top: 100%;
        left: -16px;
        background: #fff;
        min-width: 200px;
        padding: 1.25rem;
        border-radius: var(--radius-sm);
        box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
        border: 1px solid rgba(0, 0, 0, 0.04);
        opacity: 0;
        transform: translateY(8px);
        pointer-events: none;
        transition: opacity var(--transition-fast), transform var(--transition-fast);
    }

    .bdx-dropdown-item {
        display: block;
        padding: 0.5rem 0.75rem;
        font-size: var(--font-size-sm);
        color: var(--text-sub);
        text-decoration: none;
        border-radius: 6px;
        white-space: nowrap;
        transition: background var(--transition-fast), color var(--transition-fast);
    }

    .bdx-dropdown-item:hover {
        background: var(--bg-soft-pink);
        color: var(--accent-pink);
    }

    .bdx-nav-cta {
        padding: 0.625rem 1.5rem;
        background: var(--gradient-cta);
        color: var(--text-on-accent);
        font-size: var(--font-size-sm);
        font-weight: 700;
        border-radius: var(--radius-pill);
        text-decoration: none;
        transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    }

    .bdx-nav-cta:hover {
        transform: translateY(-1px);
        box-shadow: var(--shadow-cta);
        color: var(--text-on-accent);
    }
}

/* Robot Icon in header */
.bdx-nav-robot {
    display: flex;
    align-items: center;
    color: var(--text-light);
    transition: color var(--transition-fast);
}
.bdx-nav-robot:hover {
    color: var(--accent-pink);
}

/* Hamburger */
.bdx-hamburger {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 18px;
    cursor: pointer;
    z-index: 1001;
    background: none;
    border: none;
    padding: 0;
}

.bdx-hamburger span {
    display: block;
    height: 2px;
    width: 100%;
    background-color: var(--text-main);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.bdx-hamburger.is-active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.bdx-hamburger.is-active span:nth-child(2) {
    opacity: 0;
}
.bdx-hamburger.is-active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

@media (min-width: 1024px) {
    .bdx-hamburger {
        display: none;
    }
}

/* Mobile Menu */
.bdx-mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background-color: var(--bg-base);
    padding: calc(var(--header-height) + 2rem) 2rem 2rem;
    transform: translateX(100%);
    transition: transform 0.4s var(--ease-out);
    z-index: 999;
    overflow-y: auto;
}

.bdx-mobile-menu.is-active {
    transform: translateX(0);
}

.bdx-mobile-nav-item {
    border-bottom: 1px solid var(--line-soft);
}

.bdx-mobile-nav-link {
    display: block;
    padding: 1.25rem 0;
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--text-main);
    text-decoration: none;
}

.bdx-mobile-sub {
    display: none;
    padding: 0 0 1rem 1.5rem;
}

.bdx-mobile-sub.is-open {
    display: block;
}

.bdx-mobile-sub a {
    display: block;
    padding: 0.5rem 0;
    font-size: var(--font-size-sm);
    color: var(--text-sub);
    text-decoration: none;
}

.bdx-mobile-cta {
    margin-top: 2rem;
    text-align: center;
}

/* ==========================================================================
   6. Footer
   ========================================================================== */
.bdx-footer {
    background-color: #fff;
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--line-soft);
}

.bdx-footer-inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
}

@media (min-width: 768px) {
    .bdx-footer-inner {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

.bdx-footer-brand {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-main);
}

.bdx-footer-brand a {
    text-decoration: none;
    color: inherit;
}

.bdx-footer-center {
    /* empty intentionally */
}

.bdx-footer-menu-list li {
    margin-bottom: 0.625rem;
}

.bdx-footer-menu-list a {
    font-size: var(--font-size-sm);
    color: var(--text-sub);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.bdx-footer-menu-list a:hover {
    color: var(--accent-pink);
}

.bdx-footer-sns {
    margin-top: 1.5rem;
    display: flex;
    gap: 1.25rem;
}

.bdx-footer-sns a {
    font-size: var(--font-size-sm);
    color: var(--text-sub);
    text-decoration: none;
    transition: color var(--transition-fast);
}
.bdx-footer-sns a:hover {
    color: var(--accent-pink);
}

.bdx-footer-bottom {
    margin-top: 3rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.bdx-footer-robot {
    color: var(--text-light);
    opacity: 0.5;
    transition: opacity var(--transition-fast), color var(--transition-fast);
}
.bdx-footer-robot:hover {
    opacity: 1;
    color: var(--accent-pink);
}

.bdx-footer-copyright {
    font-size: var(--font-size-xs);
    color: var(--text-light);
}

/* ==========================================================================
   7. SVG Icons
   ========================================================================== */
.bdx-icon {
    stroke-width: 1.5;
    stroke: currentColor;
    fill: none;
}