:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --accent: #10b981;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --text-light: #f8fafc;
    --text-muted: #94a3b8;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    background-color: var(--bg-darker);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 100px 0;
}

.bg-dark {
    background-color: var(--bg-dark);
}

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

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 2rem;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--text-light);
}

/* Hero */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    background: url('hero.png') no-repeat center center/cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, var(--bg-darker) 30%, transparent 100%);
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 700px;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 99px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

h1 {
    font-size: 4rem;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtext {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    margin-right: 1rem;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background-color: var(--glass);
    color: white;
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background-color: rgba(255,255,255,0.1);
}

/* Steps */
.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    border-radius: 16px;
    position: relative;
    transition: transform 0.3s;
}

.step-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.step-num {
    font-size: 3rem;
    font-weight: 800;
    opacity: 0.1;
    position: absolute;
    top: 1rem;
    right: 1.5rem;
}

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

/* Accuracy Section */
.accuracy-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.pro-tip {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.tip-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.pro-tip h4 {
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.glass-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    padding: 3rem;
    border-radius: 24px;
}

.stat-bar {
    margin-top: 2rem;
}

.stat-bar span {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.progress {
    height: 8px;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(to right, var(--primary), var(--accent));
    transition: width 1s ease-out;
}

.small-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

footer {
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
}

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    .accuracy-wrapper { grid-template-columns: 1fr; }
    .hero-content { text-align: center; }
    .hero-btns { display: flex; flex-direction: column; gap: 1rem; }
    .btn-primary { margin-right: 0; }
}