/**
 * 五色百人一首ガイド専用スタイル
 * 百人一首.jp
 */

/* ============================
   カラー変数
   ============================ */
:root {
    /* ページアクセントカラー */
    --color-goshoku-accent: #5856D6;
    --color-goshoku-accent-light: rgba(88, 86, 214, 0.1);
    --color-goshoku-accent-dark: #3634A3;

    /* 五色 */
    --color-goshoku-blue: #0071E3;
    --color-goshoku-blue-light: rgba(0, 113, 227, 0.1);
    --color-goshoku-pink: #FF2D55;
    --color-goshoku-pink-light: rgba(255, 45, 85, 0.1);
    --color-goshoku-yellow: #FFCC00;
    --color-goshoku-yellow-light: rgba(255, 204, 0, 0.15);
    --color-goshoku-yellow-text: #9A7B00;
    --color-goshoku-green: #34C759;
    --color-goshoku-green-light: rgba(52, 199, 89, 0.1);
    --color-goshoku-orange: #FF9500;
    --color-goshoku-orange-light: rgba(255, 149, 0, 0.1);
}

/* ============================
   ヒーローセクション
   ============================ */
.goshoku-hero {
    text-align: center;
    padding: var(--space-12) var(--space-4);
    margin-bottom: var(--space-10);
    background: linear-gradient(
        135deg,
        var(--color-goshoku-blue-light),
        var(--color-goshoku-pink-light),
        var(--color-goshoku-yellow-light),
        var(--color-goshoku-green-light),
        var(--color-goshoku-orange-light)
    );
    border-radius: var(--radius-xl);
}

.goshoku-hero-title {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.goshoku-hero-subtitle {
    font-size: var(--text-xl);
    color: var(--color-goshoku-accent);
    font-weight: 500;
    margin-bottom: var(--space-4);
}

.goshoku-hero-description {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.8;
    max-width: 500px;
    margin: 0 auto;
}

/* ============================
   魅力カード
   ============================ */
.goshoku-features {
    margin-bottom: var(--space-12);
}

.goshoku-feature-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-6);
}

.goshoku-feature-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    text-align: center;
    border: 1px solid var(--color-border-light);
    transition: transform var(--duration-normal) var(--ease-default),
                box-shadow var(--duration-normal) var(--ease-default);
}

.goshoku-feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.goshoku-feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
}

.goshoku-feature-icon--quick {
    background: var(--color-goshoku-blue-light);
    color: var(--color-goshoku-blue);
}

.goshoku-feature-icon--progressive {
    background: var(--color-goshoku-green-light);
    color: var(--color-goshoku-green);
}

.goshoku-feature-icon--educational {
    background: var(--color-goshoku-accent-light);
    color: var(--color-goshoku-accent);
}

.goshoku-feature-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.goshoku-feature-description {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ============================
   五色の札一覧
   ============================ */
.goshoku-color-section {
    margin-bottom: var(--space-12);
}

.goshoku-color-intro {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.goshoku-color-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-4);
}

.goshoku-color-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    overflow: hidden;
}

.goshoku-color-header {
    padding: var(--space-3) var(--space-4);
    font-weight: 700;
    font-size: var(--text-lg);
    text-align: center;
    letter-spacing: 0.05em;
}

.goshoku-color-header--blue {
    background: var(--color-goshoku-blue-light);
    color: var(--color-goshoku-blue);
}

.goshoku-color-header--pink {
    background: var(--color-goshoku-pink-light);
    color: var(--color-goshoku-pink);
}

.goshoku-color-header--yellow {
    background: var(--color-goshoku-yellow-light);
    color: var(--color-goshoku-yellow-text);
}

.goshoku-color-header--green {
    background: var(--color-goshoku-green-light);
    color: var(--color-goshoku-green);
}

.goshoku-color-header--orange {
    background: var(--color-goshoku-orange-light);
    color: var(--color-goshoku-orange);
}

.goshoku-color-content {
    padding: var(--space-4);
}

.goshoku-color-count {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    text-align: center;
    margin-bottom: var(--space-3);
}

.goshoku-color-poems {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
    justify-content: center;
}

.goshoku-poem-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: none;
    transition: transform var(--duration-fast) var(--ease-default),
                box-shadow var(--duration-fast) var(--ease-default);
}

.goshoku-poem-link:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.goshoku-poem-link--blue {
    background: var(--color-goshoku-blue-light);
    color: var(--color-goshoku-blue);
}

.goshoku-poem-link--blue:hover {
    background: var(--color-goshoku-blue);
    color: #fff;
}

.goshoku-poem-link--pink {
    background: var(--color-goshoku-pink-light);
    color: var(--color-goshoku-pink);
}

.goshoku-poem-link--pink:hover {
    background: var(--color-goshoku-pink);
    color: #fff;
}

.goshoku-poem-link--yellow {
    background: var(--color-goshoku-yellow-light);
    color: var(--color-goshoku-yellow-text);
}

.goshoku-poem-link--yellow:hover {
    background: var(--color-goshoku-yellow);
    color: #fff;
}

.goshoku-poem-link--green {
    background: var(--color-goshoku-green-light);
    color: var(--color-goshoku-green);
}

.goshoku-poem-link--green:hover {
    background: var(--color-goshoku-green);
    color: #fff;
}

.goshoku-poem-link--orange {
    background: var(--color-goshoku-orange-light);
    color: var(--color-goshoku-orange);
}

.goshoku-poem-link--orange:hover {
    background: var(--color-goshoku-orange);
    color: #fff;
}

/* ============================
   基本ルール（フローステップ）
   ============================ */
.goshoku-rules-section {
    margin-bottom: var(--space-12);
}

.goshoku-rules-intro {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.goshoku-flow-steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.goshoku-flow-step {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-5);
    background: var(--color-bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
}

.goshoku-flow-step-number {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--color-goshoku-accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--text-base);
    flex-shrink: 0;
}

.goshoku-flow-step-content {
    flex: 1;
}

.goshoku-flow-step-title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.goshoku-flow-step-description {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ============================
   教育効果
   ============================ */
.goshoku-merit-section {
    margin-bottom: var(--space-12);
}

.goshoku-merit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-4);
}

.goshoku-merit-card {
    padding: var(--space-6);
    background: var(--color-bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    border-left: 3px solid var(--color-goshoku-accent);
}

.goshoku-merit-title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.goshoku-merit-description {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ============================
   CTAセクション
   ============================ */
.goshoku-cta-section {
    margin-bottom: var(--space-12);
}

.goshoku-cta-card {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    padding: var(--space-8);
    background: var(--color-modern-bg);
    border-radius: var(--radius-lg);
    color: var(--color-modern-text);
}

.goshoku-cta-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    background: var(--color-goshoku-accent-light);
    color: var(--color-goshoku-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.goshoku-cta-content {
    flex: 1;
}

.goshoku-cta-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.goshoku-cta-description {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.goshoku-cta-card .btn-primary {
    background: var(--color-goshoku-accent);
}

.goshoku-cta-card .btn-primary:hover {
    background: var(--color-goshoku-accent-dark);
}

/* 練習ツールCTA（明るい背景） */
.goshoku-cta-card--practice {
    background: linear-gradient(135deg,
        var(--color-goshoku-blue-light),
        var(--color-goshoku-pink-light),
        var(--color-goshoku-orange-light));
    color: var(--color-text-primary);
}

.goshoku-cta-card--practice .goshoku-cta-icon {
    background: rgba(255, 255, 255, 0.7);
    color: var(--color-goshoku-accent);
}

.goshoku-cta-card--practice .goshoku-cta-description {
    color: var(--color-text-secondary);
}

/* ============================
   レスポンシブ
   ============================ */
@media (max-width: 600px) {
    .goshoku-hero {
        padding: var(--space-8) var(--space-4);
    }

    .goshoku-hero-title {
        font-size: var(--text-3xl);
    }

    .goshoku-hero-subtitle {
        font-size: var(--text-lg);
    }

    .goshoku-feature-cards {
        grid-template-columns: 1fr;
    }

    .goshoku-color-grid {
        grid-template-columns: 1fr;
    }

    .goshoku-merit-grid {
        grid-template-columns: 1fr;
    }

    .goshoku-cta-card {
        flex-direction: column;
        text-align: center;
    }

    .goshoku-cta-icon {
        width: 64px;
        height: 64px;
    }

    .goshoku-flow-step {
        flex-direction: column;
        text-align: center;
    }

    .goshoku-flow-step-number {
        margin: 0 auto;
    }
}