/* AI退職代行サービス - スタイルシート */

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #0f172a;
    --accent: #06b6d4;
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
    --gradient-dark: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-800);
    background: #fff;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ヘッダー */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-100);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--gray-900);
}

.logo-icon {
    font-size: 1.5rem;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

.header-actions {
    display: flex;
    gap: 12px;
}

.mobile-menu-btn {
    display: none;
}

/* ボタン */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-600);
}

.btn-ghost:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.0625rem;
}

.btn-block {
    width: 100%;
}

.btn-cta {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

/* ヒーロー */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #eff6ff 0%, #f0fdfa 50%, #faf5ff 100%);
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 1px 1px, var(--gray-200) 1px, transparent 0);
    background-size: 40px 40px;
    opacity: 0.5;
}

.hero-content {
    max-width: 600px;
    padding: 0 24px;
    margin-left: calc((100vw - 1200px) / 2 + 24px);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: #fff;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.badge-icon {
    font-size: 1rem;
}

.hero-title {
    font-family: 'Outfit', 'Noto Sans JP', sans-serif;
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: 24px;
}

.highlight {
    color: var(--primary);
}

.highlight-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-lead {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 32px;
}

.hero-price {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 32px;
}

.price-label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.price-value {
    font-family: 'Outfit', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary);
}

.price-note {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.hero-cta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
}

.cta-note {
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.hero-visual {
    position: absolute;
    right: calc((100vw - 1200px) / 2);
    top: 50%;
    transform: translateY(-50%);
}

.phone-mockup {
    width: 320px;
    height: 640px;
    background: var(--gray-900);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #fff;
    border-radius: 32px;
    padding: 40px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chat-bubble {
    padding: 16px;
    border-radius: 16px;
    max-width: 90%;
}

.chat-bubble.ai {
    background: var(--gray-100);
    border-bottom-left-radius: 4px;
}

.chat-bubble p {
    font-size: 0.875rem;
    color: var(--gray-700);
}

.ai-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--primary);
    color: #fff;
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 500;
    margin-top: auto;
    align-self: flex-start;
}

.pulse {
    width: 8px;
    height: 8px;
    background: #fff;
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

/* セクション */
.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 48px;
    color: var(--gray-900);
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 悩みセクション */
.problems {
    padding: 100px 0 60px;
    background: #fff;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.problem-card {
    text-align: center;
    padding: 32px 24px;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-100);
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.problem-card p {
    font-weight: 500;
    color: var(--gray-700);
}

.solution-arrow {
    text-align: center;
    color: var(--primary);
    margin-bottom: 24px;
}

.solution-text {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
}

.solution-highlight {
    color: var(--primary);
}

/* 特徴セクション */
.features {
    padding: 100px 0;
    background: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    position: relative;
    padding: 40px 32px;
    background: #fff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-card.featured {
    background: var(--gradient-primary);
    color: #fff;
}

.feature-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    padding: 6px 16px;
    background: var(--warning);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 100px;
}

.feature-number {
    font-family: 'Outfit', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    opacity: 0.1;
    position: absolute;
    top: 20px;
    right: 24px;
}

.feature-card.featured .feature-number {
    opacity: 0.2;
}

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    color: var(--primary);
    margin-bottom: 24px;
}

.feature-card.featured .feature-icon {
    background: rgba(255,255,255,0.2);
    color: #fff;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 0.9375rem;
    line-height: 1.8;
}

.feature-card.featured .feature-desc {
    opacity: 0.9;
}

/* フローセクション */
.flow {
    padding: 100px 0;
    background: #fff;
}

.flow-timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
    max-width: 600px;
    margin: 0 auto;
}

.flow-step {
    display: flex;
    gap: 24px;
    padding: 32px 0;
    position: relative;
}

.flow-step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 24px;
    top: 80px;
    bottom: 0;
    width: 2px;
    background: var(--gray-200);
}

.step-number {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: #fff;
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    border-radius: 50%;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.step-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--gray-900);
}

.step-content p {
    font-size: 0.9375rem;
    color: var(--gray-600);
}

/* 料金セクション */
.pricing {
    padding: 100px 0;
    background: var(--gray-50);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.price-card {
    padding: 40px;
    background: #fff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    position: relative;
}

.price-card.popular {
    border: 2px solid var(--primary);
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 24px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 0.8125rem;
    font-weight: 700;
    border-radius: 100px;
}

.price-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.price-header p {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.price-amount {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin: 24px 0;
}

.price-amount .yen {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

.price-amount .number {
    font-family: 'Outfit', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    color: var(--gray-900);
}

.price-amount .tax {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.price-breakdown {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-top: -16px;
    margin-bottom: 24px;
}

.price-features {
    list-style: none;
    margin-bottom: 32px;
}

.price-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
    font-size: 0.9375rem;
}

.price-features .check {
    color: var(--success);
    font-weight: 700;
}

/* FAQセクション */
.faq {
    padding: 100px 0;
    background: #fff;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--gray-200);
}

.faq-item summary {
    padding: 24px 0;
    font-size: 1.0625rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary);
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-answer {
    padding: 0 0 24px;
    color: var(--gray-600);
}

/* CTAセクション */
.cta-section {
    padding: 100px 0;
    background: var(--gradient-dark);
}

.cta-box {
    text-align: center;
    color: #fff;
}

.cta-box h2 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-box p {
    opacity: 0.8;
    margin-bottom: 32px;
}

/* フッター */
.footer {
    padding: 80px 0 40px;
    background: var(--gray-900);
    color: #fff;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.875rem;
    opacity: 0.7;
}

.footer-links h4 {
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 20px;
    opacity: 0.5;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #fff;
    opacity: 0.8;
    text-decoration: none;
    font-size: 0.9375rem;
    transition: opacity 0.2s;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    font-size: 0.8125rem;
    opacity: 0.5;
}

/* フォーム共通 */
.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.form-label .required {
    color: var(--error);
    margin-left: 4px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    background: #fff;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-error {
    font-size: 0.8125rem;
    color: var(--error);
    margin-top: 6px;
}

.form-hint {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-top: 6px;
}

/* アラート */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.alert-success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
}

/* カード */
.card {
    background: #fff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    padding: 32px;
}

.card-header {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-100);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
}

/* レスポンシブ */
@media (max-width: 1024px) {
    .hero-content {
        margin-left: 24px;
    }
    
    .hero-visual {
        display: none;
    }
    
    .problems-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .price-card.popular {
        transform: none;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav,
    .header-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
        flex-direction: column;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 4px;
    }
    
    .mobile-menu-btn span {
        width: 24px;
        height: 2px;
        background: var(--gray-700);
        border-radius: 2px;
    }
    
    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }
    
    .hero-content {
        margin-left: 0;
        padding: 0 24px;
    }
    
    .problems-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    
    .problem-card {
        padding: 24px 16px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}