/* ========================================
   XM海外FX SEO記事LP - Mobile First CSS
   ======================================== */

/* CSS Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.8;
    color: #333;
    background-color: #fafafa;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    padding: 0 16px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.4;
    color: #1a1a1a;
}

h1 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

h2 {
    font-size: 1.375rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid #2563eb;
}

h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    color: #374151;
}

h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: #4b5563;
}

p {
    margin-bottom: 1rem;
}

ul, ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

a {
    color: #2563eb;
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: #1d4ed8;
    text-decoration: underline;
}

/* ========================================
   Hero Section (ファーストビュー)
   ======================================== */
.hero {
    background: linear-gradient(135deg, #1e3a5f 0%, #2c5282 100%);
    color: #fff;
    padding: 3rem 0 2.5rem;
    text-align: center;
}

.hero h1 {
    color: #fff;
    font-size: 1.375rem;
    line-height: 1.5;
    margin-bottom: 1.25rem;
}

.hero-sub {
    font-size: 0.9375rem;
    line-height: 1.7;
    opacity: 0.95;
    margin-bottom: 1.5rem;
    text-align: left;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    text-align: center;
}

.btn-primary {
    background-color: #22c55e;
    color: #fff;
    border: none;
}

.btn-primary:hover {
    background-color: #16a34a;
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.15);
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.25);
    color: #fff;
    text-decoration: none;
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.0625rem;
}

/* ========================================
   Sections
   ======================================== */
.section {
    padding: 2.5rem 0;
}

.section-alt {
    background-color: #f3f4f6;
}

/* ========================================
   結論セクション (Comparison Box)
   ======================================== */
.comparison-box {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 1.5rem 0;
}

.fit-box,
.unfit-box {
    padding: 1.25rem;
    border-radius: 8px;
}

.fit-box {
    background-color: #ecfdf5;
    border-left: 4px solid #22c55e;
}

.fit-box h3 {
    color: #166534;
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.fit-box ul {
    margin-bottom: 0;
}

.fit-box li {
    color: #166534;
    position: relative;
    padding-left: 0.25rem;
}

.fit-box li::marker {
    color: #22c55e;
}

.unfit-box {
    background-color: #fef2f2;
    border-left: 4px solid #f87171;
}

.unfit-box h3 {
    color: #991b1b;
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.unfit-box ul {
    margin-bottom: 0;
}

.unfit-box li {
    color: #991b1b;
    position: relative;
    padding-left: 0.25rem;
}

.unfit-box li::marker {
    color: #f87171;
}

.note {
    font-size: 0.9375rem;
    color: #6b7280;
    padding: 1rem;
    background-color: #f9fafb;
    border-radius: 6px;
    margin-top: 1rem;
}

/* ========================================
   不安要素セクション (Anxiety Block)
   ======================================== */
.anxiety-block {
    background-color: #fff;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.anxiety-block:last-child {
    margin-bottom: 0;
}

.anxiety-block h3 {
    color: #1e3a5f;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e5e7eb;
    margin-bottom: 1rem;
}

.content-block {
    margin-top: 1rem;
}

.content-block h4 {
    background-color: #f8fafc;
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-size: 0.9375rem;
}

.content-block h4:first-child {
    margin-top: 0;
}

.content-block p {
    font-size: 0.9375rem;
    margin-bottom: 0.75rem;
}

.content-block p:last-child {
    margin-bottom: 0;
}

/* ========================================
   判断軸セクション (Criteria)
   ======================================== */
.criteria-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.criteria-item {
    background-color: #fff;
    border-radius: 8px;
    padding: 1.25rem;
    border: 1px solid #e5e7eb;
}

.criteria-item h3 {
    color: #2563eb;
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.criteria-item p {
    font-size: 0.9375rem;
    margin-bottom: 0.5rem;
}

.criteria-note {
    font-size: 0.875rem;
    color: #6b7280;
    padding: 0.75rem;
    background-color: #f9fafb;
    border-radius: 4px;
    margin-bottom: 0 !important;
}

/* ========================================
   選び方セクション (Selection Guide)
   ======================================== */
.selection-guide {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 1.5rem 0;
}

.selection-item {
    padding: 1.25rem;
    background-color: #fff;
    border-radius: 8px;
    border-left: 4px solid #2563eb;
}

.selection-item h3 {
    font-size: 1rem;
    color: #1e3a5f;
    margin-bottom: 0.5rem;
}

.selection-item p {
    font-size: 0.9375rem;
    margin-bottom: 0;
}

/* ========================================
   ステップセクション (Steps)
   ======================================== */
.steps {
    margin: 1.5rem 0;
}

.step {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
}

.step:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

.step-num {
    flex-shrink: 0;
    width: 2.5rem;
    height: 2.5rem;
    background-color: #2563eb;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.step-content p {
    font-size: 0.9375rem;
    margin-bottom: 0;
}

/* CTA Box */
.cta-box {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border: 2px solid #22c55e;
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    margin-top: 2rem;
}

.cta-box p {
    font-size: 0.9375rem;
    margin-bottom: 1rem;
}

/* ========================================
   FAQ Section
   ======================================== */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.faq-item {
    background-color: #fff;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    overflow: hidden;
}

.faq-item summary {
    padding: 1rem 1.25rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9375rem;
    color: #1a1a1a;
    transition: background-color 0.2s ease;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.25rem;
    color: #2563eb;
    transition: transform 0.2s ease;
}

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

.faq-item summary:hover {
    background-color: #f9fafb;
}

.faq-answer {
    padding: 0 1.25rem 1.25rem;
    font-size: 0.9375rem;
    color: #4b5563;
    border-top: 1px solid #e5e7eb;
    padding-top: 1rem;
}

.faq-answer p {
    margin-bottom: 0;
}

/* ========================================
   まとめセクション (Summary)
   ======================================== */
.summary-content {
    background-color: #fff;
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid #e5e7eb;
    margin-bottom: 1.5rem;
}

.summary-list {
    background-color: #f8fafc;
    padding: 1rem 1rem 1rem 2rem;
    border-radius: 6px;
    margin: 1rem 0;
}

.summary-list li {
    font-size: 0.9375rem;
}

.final-cta {
    text-align: center;
    padding: 1.5rem 0;
}

/* ========================================
   Footer (免責事項)
   ======================================== */
.footer {
    background-color: #1f2937;
    color: #d1d5db;
    padding: 2rem 0;
}

.disclaimer {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.disclaimer h3 {
    color: #f3f4f6;
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.disclaimer ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 0;
}

.disclaimer li {
    font-size: 0.8125rem;
    line-height: 1.6;
    margin-bottom: 0.5rem;
    padding-left: 1rem;
    position: relative;
}

.disclaimer li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #9ca3af;
}

.disclaimer li:last-child {
    margin-bottom: 0;
}

.copyright {
    text-align: center;
    font-size: 0.8125rem;
    color: #9ca3af;
    margin-bottom: 0;
}

/* ========================================
   Tablet & Desktop Responsive
   ======================================== */
@media (min-width: 640px) {
    .container {
        padding: 0 24px;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    .hero {
        padding: 4rem 0 3rem;
    }

    .hero h1 {
        font-size: 1.625rem;
    }

    .hero-sub {
        font-size: 1rem;
        text-align: center;
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
    }

    .section {
        padding: 3.5rem 0;
    }

    .comparison-box {
        flex-direction: row;
        gap: 1.5rem;
    }

    .fit-box,
    .unfit-box {
        flex: 1;
    }

    .anxiety-block {
        padding: 2rem;
    }

    .criteria-item {
        padding: 1.5rem;
    }

    .step-num {
        width: 3rem;
        height: 3rem;
        font-size: 1.25rem;
    }

    .faq-item summary {
        padding: 1.25rem 1.5rem;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 800px;
    }

    h1 {
        font-size: 2rem;
    }

    .hero h1 {
        font-size: 1.875rem;
    }

    .selection-guide {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }

    .criteria-list {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center {
    text-align: center;
}

.mb-0 {
    margin-bottom: 0;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

/* Smooth scroll padding for fixed headers if needed */
[id] {
    scroll-margin-top: 1rem;
}

/* Focus styles for accessibility */
a:focus,
button:focus,
summary:focus {
    outline: 2px solid #2563eb;
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .hero {
        background: #1e3a5f;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    
    .btn {
        border: 1px solid #333;
    }
}