/**
 * LP (Landing Page) Stylesheet
 * YumeLog - 夢日記アプリ
 * variables.css と併用
 */

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

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

.lp-body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    line-height: var(--line-height-relaxed);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Container ===== */
.lp-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Header ===== */
.lp-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 13, 13, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.lp-header-inner {
    max-width: 800px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.lp-logo {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-inverse);
    text-decoration: none;
}

.lp-header-cta {
    display: inline-block;
    padding: 8px 20px;
    background: var(--color-accent);
    color: var(--color-text-inverse);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: background var(--transition-fast);
}

.lp-header-cta:hover {
    background: var(--color-accent-light);
    color: var(--color-text-inverse);
}

/* ===== Hero ===== */
.lp-hero {
    position: relative;
    padding: 80px 20px 60px;
    text-align: center;
    background: linear-gradient(180deg, rgba(90, 24, 154, 0.25) 0%, rgba(13, 13, 13, 0) 100%);
    overflow: hidden;
}

.lp-hero::before {
    content: '';
    position: absolute;
    top: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(123, 44, 191, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.lp-hero-nightmare::before {
    background: radial-gradient(circle, rgba(191, 44, 44, 0.12) 0%, transparent 70%);
}

.lp-hero-nightmare {
    background: linear-gradient(180deg, rgba(80, 20, 40, 0.2) 0%, rgba(13, 13, 13, 0) 100%);
}

.lp-hero-meaning::before {
    background: radial-gradient(circle, rgba(44, 120, 191, 0.12) 0%, transparent 70%);
}

.lp-hero-meaning {
    background: linear-gradient(180deg, rgba(20, 40, 80, 0.2) 0%, rgba(13, 13, 13, 0) 100%);
}

.lp-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}

.lp-hero-label {
    display: inline-block;
    padding: 6px 16px;
    margin-bottom: 20px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-accent-light);
    background: rgba(123, 44, 191, 0.15);
    border: 1px solid rgba(123, 44, 191, 0.3);
    border-radius: var(--radius-full);
}

.lp-hero h1 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    line-height: 1.4;
    color: var(--color-text-inverse);
    margin-bottom: 20px;
}

.lp-hero-sub {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

/* ===== CTA Button ===== */
.lp-cta-btn {
    display: inline-block;
    padding: 16px 40px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    color: var(--color-text-inverse);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: 0 4px 20px rgba(123, 44, 191, 0.4);
}

.lp-cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(123, 44, 191, 0.55);
    color: var(--color-text-inverse);
}

.lp-cta-note {
    margin-top: 12px;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ===== Sections ===== */
.lp-section {
    padding: 64px 20px;
}

.lp-section-alt {
    background: var(--color-bg-secondary);
}

.lp-section h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-inverse);
    margin-bottom: 20px;
    line-height: 1.4;
}

.lp-section p {
    color: var(--color-text-primary);
    margin-bottom: 16px;
    line-height: 1.9;
}

.lp-section p:last-child {
    margin-bottom: 0;
}

/* ===== Steps ===== */
.lp-steps {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 32px;
}

.lp-step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.lp-step-num {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    color: var(--color-text-inverse);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-full);
}

.lp-step h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-inverse);
    margin-bottom: 8px;
}

.lp-step p {
    font-size: var(--font-size-md);
    color: var(--color-text-primary);
    margin-bottom: 0;
}

/* ===== Cards ===== */
.lp-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-top: 32px;
}

.lp-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: border-color var(--transition-fast);
}

.lp-card:hover {
    border-color: var(--color-accent);
}

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

.lp-card-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.lp-card h3 {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-inverse);
    margin-bottom: 8px;
}

.lp-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: 0;
    line-height: 1.7;
}

/* ===== Problem / Solution ===== */
.lp-problem-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-top: 32px;
}

.lp-problem {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.lp-problem-q {
    padding: 20px 24px;
    background: var(--color-bg-tertiary);
}

.lp-problem-label {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-error-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.lp-problem-q h3 {
    font-size: var(--font-size-lg);
    color: var(--color-text-inverse);
    margin-bottom: 0;
}

.lp-problem-a {
    padding: 20px 24px;
    background: var(--color-bg-secondary);
}

.lp-solution-label {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent-light);
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.lp-problem-a p {
    margin-bottom: 0;
}

/* ===== Features (image + text) ===== */
.lp-features {
    display: flex;
    flex-direction: column;
    gap: 48px;
    margin-top: 40px;
}

.lp-feature {
    display: flex;
    gap: 32px;
    align-items: center;
}

.lp-feature-reverse {
    flex-direction: row-reverse;
}

.lp-feature-img-placeholder {
    flex-shrink: 0;
    width: 280px;
    height: 200px;
    background: var(--color-bg-tertiary);
    border: 1px dashed var(--color-border-light);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    text-align: center;
    padding: 16px;
}

.lp-feature-img-placeholder::after {
    content: attr(data-label);
}

.lp-feature-text h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-inverse);
    margin-bottom: 12px;
}

.lp-feature-text p {
    color: var(--color-text-primary);
    margin-bottom: 0;
}

/* ===== Table ===== */
.lp-table-wrap {
    margin-top: 24px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.lp-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.lp-table th,
.lp-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.lp-table th {
    background: var(--color-bg-tertiary);
    color: var(--color-text-inverse);
    font-weight: var(--font-weight-semibold);
}

.lp-table td {
    color: var(--color-text-primary);
}

.lp-table tr:hover td {
    background: rgba(123, 44, 191, 0.05);
}

/* ===== Notice ===== */
.lp-notice {
    background: var(--color-bg-tertiary);
    border-left: 4px solid var(--color-warning);
    border-radius: var(--radius-md);
    padding: 28px 24px;
}

.lp-notice h2 {
    font-size: var(--font-size-xl);
    margin-bottom: 12px;
}

.lp-notice ul {
    list-style: none;
    padding: 0;
    margin: 16px 0;
}

.lp-notice ul li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 10px;
    color: var(--color-text-primary);
    line-height: 1.7;
}

.lp-notice ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--color-warning);
    border-radius: 50%;
}

/* ===== Compare ===== */
.lp-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 32px 0;
}

.lp-compare-item {
    padding: 24px;
    border-radius: var(--radius-lg);
}

.lp-compare-item h3 {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 16px;
}

.lp-compare-old {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
}

.lp-compare-old h3 {
    color: var(--color-text-secondary);
}

.lp-compare-new {
    background: rgba(123, 44, 191, 0.1);
    border: 1px solid rgba(123, 44, 191, 0.3);
}

.lp-compare-new h3 {
    color: var(--color-accent-light);
}

.lp-compare-item ul {
    list-style: none;
    padding: 0;
}

.lp-compare-item ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    line-height: 1.6;
}

.lp-compare-old ul li::before {
    content: '△';
    position: absolute;
    left: 0;
    color: var(--color-text-muted);
    font-size: 12px;
}

.lp-compare-new ul li::before {
    content: '◎';
    position: absolute;
    left: 0;
    color: var(--color-accent-light);
    font-size: 12px;
}

/* ===== Dream List (LP3) ===== */
.lp-dream-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 32px;
}

.lp-dream-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 20px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: border-color var(--transition-fast);
}

.lp-dream-item:hover {
    border-color: var(--color-accent);
}

.lp-dream-icon {
    flex-shrink: 0;
    font-size: 28px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(123, 44, 191, 0.1);
    border-radius: var(--radius-md);
}

.lp-dream-item h3 {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-inverse);
    margin-bottom: 6px;
}

.lp-dream-item p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: 0;
    line-height: 1.7;
}

/* ===== Timeline (LP3) ===== */
.lp-timeline {
    position: relative;
    margin-top: 32px;
    padding-left: 32px;
}

.lp-timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-accent);
    opacity: 0.3;
}

.lp-timeline-item {
    position: relative;
    margin-bottom: 32px;
    padding-left: 20px;
}

.lp-timeline-item::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 6px;
    width: 12px;
    height: 12px;
    background: var(--color-accent);
    border-radius: 50%;
    border: 2px solid var(--color-bg-primary);
}

.lp-timeline-era {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.lp-timeline-item h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-inverse);
    margin-bottom: 8px;
}

.lp-timeline-item p {
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* ===== FAQ ===== */
.lp-faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 24px;
}

.lp-faq {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.lp-faq summary {
    padding: 16px 20px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-inverse);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.lp-faq summary::after {
    content: '+';
    font-size: 20px;
    color: var(--color-accent-light);
    font-weight: var(--font-weight-bold);
    transition: transform var(--transition-fast);
}

.lp-faq[open] summary::after {
    transform: rotate(45deg);
}

.lp-faq p {
    padding: 0 20px 16px;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.lp-faq a {
    color: var(--color-accent-light);
    text-decoration: underline;
}

/* ===== CTA Section ===== */
.lp-cta-section {
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
}

.lp-cta-block {
    text-align: center;
    padding: 40px 0;
}

.lp-cta-block h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: 16px;
}

.lp-cta-block p {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

/* ===== Footer ===== */
.lp-footer {
    padding: 40px 20px;
    background: var(--color-bg-primary);
    border-top: 1px solid var(--color-border);
}

.lp-footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 32px;
    margin-bottom: 24px;
}

.lp-footer-brand p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: 8px;
    margin-bottom: 0;
}

.lp-footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.lp-footer-nav a {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.lp-footer-nav a:hover {
    color: var(--color-accent-light);
}

.lp-footer-copy {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .lp-hero {
        padding: 60px 16px 48px;
    }

    .lp-hero h1 {
        font-size: var(--font-size-2xl);
    }

    .lp-hero-sub {
        font-size: var(--font-size-md);
    }

    .lp-section {
        padding: 48px 16px;
    }

    .lp-section h2 {
        font-size: var(--font-size-xl);
    }

    .lp-cta-btn {
        padding: 14px 32px;
        font-size: var(--font-size-md);
    }

    /* Feature: stack vertically on mobile */
    .lp-feature,
    .lp-feature-reverse {
        flex-direction: column;
    }

    .lp-feature-img-placeholder {
        width: 100%;
        height: 180px;
    }

    /* Compare: stack on mobile */
    .lp-compare {
        grid-template-columns: 1fr;
    }

    /* Cards: single column */
    .lp-cards {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .lp-footer-inner {
        flex-direction: column;
        gap: 24px;
    }

    .lp-footer-nav {
        flex-direction: column;
        gap: 12px;
    }

    /* Step number */
    .lp-step-num {
        width: 36px;
        height: 36px;
        font-size: var(--font-size-md);
    }
}

@media (max-width: 480px) {
    .lp-hero h1 {
        font-size: var(--font-size-xl);
    }

    .lp-hero-sub br {
        display: none;
    }

    .lp-cta-block h2 {
        font-size: var(--font-size-xl);
    }
}