@charset "UTF-8";

:root {
    /* 2026年標準：oklch(明るさ 色度 色相 / 不透明度) */
    --brand-line: oklch(65% 0.25 150);
    --brand-line-dark: oklch(55% 0.25 150);
    --bg-base: oklch(99% 0.01 240);
    --glass: oklch(100% 0 0 / 80%);
    --text-main: oklch(20% 0.02 240);
    --text-muted: oklch(50% 0.02 240);
    --accent: oklch(70% 0.18 200);
}

body {
    margin: 0;
    font-family: "Inter", "Hiragino Sans", "Meiryo", sans-serif;
    background: var(--bg-base);
    background-image:
        radial-gradient(circle at 0% 0%, oklch(94% 0.04 200) 0%, transparent 50%),
        radial-gradient(circle at 100% 100%, oklch(94% 0.04 300) 0%, transparent 50%);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100dvh;
}

/* --- レイアウト構造 --- */
.container {
    inline-size: min(92%, 1100px);
    margin-inline: auto;
}

/* ダッシュボード等で使う中央寄せカード */
.main-card {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 3rem 2rem;
    border-radius: 2.5rem;
    box-shadow: 0 20px 50px oklch(0% 0 0 / 5%);
    border: 1px solid oklch(100% 0 0 / 50%);
    text-align: center;
    inline-size: 100%;
}

/* --- ヘッダー --- */
.site-header {
    padding-block: 1.2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-block-end: 1px solid oklch(0% 0 0 / 5%);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: -0.05em;
    text-decoration: none;
    color: var(--text-main);
}

/* --- ヒーローセクション --- */
.hero {
    padding-block: 6rem 4rem;
    text-align: center;
}

.hero-tag {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    background: var(--brand-line-dark);
    color: white;
    border-radius: 2rem;
    font-size: 0.8rem;
    font-weight: 700;
    margin-block-end: 1.5rem;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.04em;
    margin-block-end: 1.5rem;
}

/* --- 共通ボタン（login-button に統合） --- */
.login-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    background: var(--brand-line);
    color: oklch(100% 0 0) !important; /* 絶対に白 */
    text-decoration: none !important;
    padding: 1.1rem 2.2rem;
    border-radius: 100px;
    font-weight: 800;
    font-size: 1.1rem;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 10px 20px oklch(65% 0.25 150 / 25%);
    border: none;
    cursor: pointer;
    max-inline-size: 400px; /* 広がりすぎ防止 */
    margin-inline: auto;
}

.login-button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 30px oklch(65% 0.25 150 / 35%);
    filter: brightness(1.05);
}

.login-button i {
    font-size: 1.4rem;
    color: white !important;
}

/* --- 特徴・ステータスカード --- */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    padding-block: 2rem;
}

.feature-card {
    background: white;
    padding: 2.2rem;
    border-radius: 2rem;
    box-shadow: 0 10px 30px oklch(0% 0 0 / 3%);
    transition: transform 0.3s ease;
}

.feature-card:hover { transform: translateY(-8px); }

/* アイコン用ボックス */
.icon-box {
    margin-block-end: 1.2rem;
    color: var(--brand-line);
    font-size: 2rem;
}

/* --- フッター --- */
.site-footer {
    padding-block: 4rem 2rem;
    text-align: center;
    background: oklch(96% 0.01 240);
    margin-block-start: 4rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-block-end: 1.5rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
}

.footer-links a:hover { color: var(--text-main); }