:root {
    --primary: #0D9373;
    --primary-light: #2DD4A8;
    --primary-dark: #086B52;
    --secondary: #1A5F4A;
    --accent: #F59E0B;
    --accent-light: #FBBF24;
    --bg-primary: #FAFCFA;
    --bg-secondary: #EDF5F1;
    --bg-card: rgba(255, 255, 255, 0.85);
    --text-primary: #0F2922;
    --text-secondary: #3D6B5A;
    --text-muted: #6B9380;
    --border: rgba(13, 147, 115, 0.15);
    --shadow-sm: 0 2px 8px rgba(13, 147, 115, 0.08);
    --shadow-md: 0 8px 30px rgba(13, 147, 115, 0.12);
    --shadow-lg: 0 20px 60px rgba(13, 147, 115, 0.15);
    --shadow-glow: 0 0 40px rgba(45, 212, 168, 0.25);
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --font-display: 'Noto Serif SC', serif;
    --font-body: 'Noto Sans SC', -apple-system, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.7;
    position: relative;
}

.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.35;
    animation: blobFloat 20s ease-in-out infinite;
}

.blob-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, #2DD4A8 0%, #0D9373 100%);
    top: -200px;
    right: -150px;
    animation-delay: 0s;
}

.blob-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #34D399 0%, #059669 100%);
    bottom: -150px;
    left: -100px;
    animation-delay: -7s;
}

.blob-3 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #6EE7B7 0%, #10B981 100%);
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes blobFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}

.floating-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(2px 2px at 20% 30%, rgba(45, 212, 168, 0.3), transparent),
        radial-gradient(2px 2px at 60% 70%, rgba(45, 212, 168, 0.2), transparent),
        radial-gradient(1.5px 1.5px at 80% 20%, rgba(45, 212, 168, 0.25), transparent),
        radial-gradient(1.5px 1.5px at 40% 80%, rgba(45, 212, 168, 0.2), transparent),
        radial-gradient(2px 2px at 90% 60%, rgba(45, 212, 168, 0.15), transparent),
        radial-gradient(1px 1px at 10% 90%, rgba(45, 212, 168, 0.3), transparent);
    animation: particlesFloat 30s linear infinite;
}

@keyframes particlesFloat {
    0% { transform: translateY(0); }
    100% { transform: translateY(-100px); }
}

.main-header {
    position: relative;
    z-index: 10;
    padding: 2rem 1.5rem 1rem;
    text-align: center;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
}

.logo-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 80px;
    height: 80px;
    animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.brain-gut-svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 4px 12px rgba(13, 147, 115, 0.25));
}

.site-title {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 6vw, 3.6rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.02em;
}

.main-content {
    position: relative;
    z-index: 10;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem 3rem;
}

.hero-section {
    text-align: center;
    padding: 1.5rem 0 2.5rem;
    position: relative;
}

.hero-title {
    font-family: var(--font-display);
    margin-bottom: 1.25rem;
}

.title-highlight {
    display: block;
    font-size: clamp(1.6rem, 5vw, 2.5rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.3;
}

.hero-desc {
    max-width: 580px;
    margin: 0 auto;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.scales-grid-section {
    padding: 1rem 0 3rem;
}.grid-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1rem;
}.scale-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    padding: 2rem 1.25rem;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    overflow: hidden;
    min-height: 180px;
}

.card-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(45, 212, 168, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.5s ease;
    pointer-events: none;
}

.scale-card:hover .card-glow {
    width: 300%;
    height: 300%;
}

.scale-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: rgba(45, 212, 168, 0.35);
}

.scale-card:active {
    transform: translateY(-3px) scale(0.98);
    transition-duration: 0.1s;
}

.card-icon-wrap {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.4s ease;
}

.card-icon {
    width: 36px;
    height: 36px;
    stroke-width: 1.8;
    transition: all 0.4s ease;
}

.card-type-1 .card-icon-wrap { background: linear-gradient(135deg, #D1FAE5 0%, #A7F3D0 100%); color: #059669; }
.card-type-2 .card-icon-wrap { background: linear-gradient(135deg, #DBEAFE 0%, #BFDBFE 100%); color: #2563EB; }
.card-type-3 .card-icon-wrap { background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%); color: #D97706; }
.card-type-4 .card-icon-wrap { background: linear-gradient(135deg, #FEE2E2 0%, #FECACA 100%); color: #DC2626; }
.card-type-5 .card-icon-wrap { background: linear-gradient(135deg, #EDE9FE 0%, #DDD6FE 100%); color: #7C3AED; }
.card-type-6 .card-icon-wrap { background: linear-gradient(135deg, #CCFBF1 0%, #99F6E4 100%); color: #0D9488; }
.card-type-7 .card-icon-wrap { background: linear-gradient(135deg, #FCE7F3 0%, #FBCFE8 100%); color: #DB2777; }
.card-type-8 .card-icon-wrap { background: linear-gradient(135deg, #FFEDD5 0%, #FED7AA 100%); color: #EA580C; }
.card-type-9 .card-icon-wrap { background: linear-gradient(135deg, #E0E7FF 0%, #C7D2FE 100%); color: #4338CA; }

.scale-card:hover .card-icon-wrap {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.scale-card:hover .card-title {
    color: var(--primary);
}

.card-subtitle {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 400;
    letter-spacing: 0.03em;
}

.card-arrow {
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%) translateX(-8px);
    font-size: 1.3rem;
    color: var(--primary-light);
    opacity: 0;
    transition: all 0.4s ease;
    font-weight: 300;
}

.scale-card:hover .card-arrow {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
}

.info-section {
    padding: 3rem 0 1rem;
}

.info-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.info-card {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: transform 0.3s ease;
}

.info-card:hover {
    transform: translateY(-4px);
}

.info-num {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary-light);
    opacity: 0.4;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.info-card h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.info-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

.main-footer {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 2rem 1.5rem;
    border-top: 1px solid var(--border);
    background: rgba(250, 252, 250, 0.7);
    backdrop-filter: blur(10px);
}

.main-footer p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.disclaimer {
    margin-top: 0.35rem;
    font-size: 0.78rem !important;
    color: var(--text-muted);
    opacity: 0.7;
}

@media (max-width: 768px) {
    .main-header {
        padding: 1rem 1rem 0.5rem;
    }

    .logo-icon {
        width: 52px;
        height: 52px;
    }

    .logo-area {
        gap: 0.4rem;
    }

    .site-title {
        font-size: 2.0rem;
    }

    .hero-section {
        padding: 1rem 0 1.25rem;
    }

    .hero-title {
        margin-bottom: 0.75rem;
    }

    .title-highlight {
        font-size: 1.35rem;
    }

    .hero-desc {
        font-size: 0.85rem;
        line-height: 1.6;
    }

    .grid-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.85rem;
    }

    .scale-card {
        padding: 1rem 0.6rem;
        min-height: 110px;
        gap: 0.3rem;
    }

    .card-icon-wrap {
        width: 38px;
        height: 38px;
    }

    .card-icon {
        width: 24px;
        height: 24px;
    }

    .card-title {
        font-size: 0.88rem;
    }

    .card-subtitle {
        font-size: 0.62rem;
    }

    .card-arrow {
        display: none;
    }

    .info-cards {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .info-section {
        padding: 1.5rem 0 0.5rem;
    }

    .info-card {
        padding: 1.25rem 1rem;
    }

    .info-num {
        font-size: 2rem;
    }

    .main-footer {
        padding: 1.25rem 1rem;
    }
}

@media (max-width: 600px) {
    .hero-desc {
        display: none;
    }

    .grid-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .scale-card {
        min-height: 100px;
        padding: 0.85rem 0.5rem;
    }

    .info-section {
        display: none;
    }
}

@media (max-width: 480px) {
    .main-header {
        padding: 0.75rem 0.75rem 0.35rem;
    }

    .logo-icon {
        width: 44px;
        height: 44px;
    }

    .logo-area {
        gap: 0.25rem;
    }

    .site-title {
        font-size: 1.7rem;
        letter-spacing: 0.02em;
    }

    .hero-section {
        padding: 0.6rem 0 0.8rem;
    }

    .hero-title {
        margin-bottom: 0.3rem;
    }

    .title-highlight {
        font-size: 1.15rem;
        line-height: 1.25;
    }

    .hero-desc {
        font-size: 0.75rem;
        line-height: 1.5;
        margin-top: 0.5rem;
    }

    .main-content {
        padding: 0 0.75rem 2rem;
    }

    .grid-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.6rem;
    }

    .scale-card {
        padding: 0.7rem 0.4rem;
        min-height: 92px;
        gap: 0.2rem;
        border-radius: 14px;
    }

    .card-glow {
        display: none;
    }

    .card-icon-wrap {
        width: 32px;
        height: 32px;
        border-radius: 50%;
    }

    .card-icon {
        width: 20px;
        height: 20px;
    }

    .card-title {
        font-size: 0.78rem;
        font-weight: 700;
        line-height: 1.2;
    }

    .card-subtitle {
        font-size: 0.55rem;
        line-height: 1.1;
    }

    .scales-grid-section {
        padding: 0.4rem 0 2rem;
    }

    .info-section {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}