:root {
    --primary-color: #007BFF;
    --secondary-color: #00E5FF;
    --background-color: #F8FAFC;
    --text-color: #1E293B;
    --card-bg: rgba(255, 255, 255, 0.8);
    --border-color: rgba(0, 0, 0, 0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
}

body {
    background-image: linear-gradient(rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.4)), url('../img/sky_bg.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Background blob (acting as clouds now) */
.bg-blob {
    position: absolute;
    top: -10%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: white;
    filter: blur(120px);
    border-radius: 50%;
    opacity: 0.6;
    z-index: -1;
    animation: float 15s ease-in-out infinite;
}

.bg-blob-2 {
    position: absolute;
    bottom: 20%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: white;
    filter: blur(100px);
    border-radius: 50%;
    opacity: 0.5;
    z-index: -1;
    animation: float 18s ease-in-out infinite reverse;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-30px, 50px) scale(1.1); }
    100% { transform: translate(0, 0) scale(1); }
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    background: rgba(248, 250, 252, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--primary-color);
}

main {
    padding-top: 100px;
}

section {
    padding: 6rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.hero {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.hero h2 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, var(--text-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.2s;
}

.hero p {
    font-size: 1.5rem;
    color: #475569;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.4s;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: 0 10px 20px rgba(0, 123, 255, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.6s;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(0, 123, 255, 0.3);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    font-weight: 700;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.03);
    transition: transform 0.4s, box-shadow 0.4s;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 50px rgba(0,0,0,0.08);
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.card p {
    color: #64748B;
}

footer {
    text-align: center;
    padding: 3rem 5%;
    background: white;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

/* Animations */
@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .hero h2 { font-size: 2.5rem; }
    .hero p { font-size: 1.2rem; }
}