/* ============================================
   個人指導塾拓杜（オンライン） — サイトデザイン
   ============================================ */
:root {
    --color-bg: #f8fafc;
    --color-bg-alt: #f1f5f9;
    --color-card: #ffffff;
    --color-primary: #0f766e;
    --color-primary-light: #14b8a6;
    --color-primary-dark: #0d9488;
    --color-accent: #0ea5e9;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --font-sans: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Outfit', 'Noto Sans JP', sans-serif;
    --shadow-soft: 0 4px 20px rgba(15, 118, 110, 0.08);
    --shadow-card: 0 8px 32px rgba(15, 118, 110, 0.1);
    --radius: 10px;
    --radius-sm: 6px;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    font-size: 15px;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease, opacity 0.2s ease;
}
a:hover {
    color: var(--color-primary-dark);
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
}

/* ----- Header ----- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 20px;
}

@media (max-width: 480px) {
    .header {
        padding: 10px 16px;
    }
    .logo-main {
        font-size: 1.2rem;
    }
    .logo-sub {
        font-size: 0.65rem;
    }
}

.header-inner {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.logo {
    display: flex;
    flex-direction: column;
    color: var(--color-text);
}
.logo-main {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-primary);
}
.logo-sub {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}
.nav a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
}
.nav a:hover {
    color: var(--color-primary);
}
.nav-cta {
    background: var(--color-primary);
    color: #fff !important;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
}
.nav-cta:hover {
    background: var(--color-primary-dark);
    color: #fff !important;
}

.nav-toggle {
    display: none;
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    position: relative;
    cursor: pointer;
}
.nav-toggle::before,
.nav-toggle::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-text);
    transition: transform 0.3s ease;
}
.nav-toggle::before { top: 8px; }
.nav-toggle::after { bottom: 8px; }
.nav-toggle span {
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    height: 2px;
    margin-top: -1px;
    background: var(--color-text);
    transition: opacity 0.2s ease;
}
.nav-toggle.is-open::before {
    transform: translateY(5px) rotate(45deg);
}
.nav-toggle.is-open::after {
    transform: translateY(-5px) rotate(-45deg);
}
.nav-toggle.is-open span {
    opacity: 0;
}

@media (max-width: 900px) {
    .header-inner {
        justify-content: space-between;
    }
    .nav-toggle {
        display: block;
        min-width: 44px;
        min-height: 44px;
    }
    .nav {
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        background: var(--color-card);
        flex-direction: column;
        padding: 24px;
        gap: 12px;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.3s ease, opacity 0.3s ease;
        box-shadow: var(--shadow-card);
    }
    .nav.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
}

/* ----- Hero ----- */
.hero {
    position: relative;
    min-height: 75vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 20px 80px;
    background: linear-gradient(135deg, #0f766e 0%, #0d9488 50%, #14b8a6 100%);
    color: #fff;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
}

.hero-text {
    flex: 1;
    text-align: center;
    min-width: 0;
}

@media (min-width: 900px) {
    .hero-text {
        text-align: left;
    }
}

.hero-visual {
    flex: 0 0 auto;
    max-width: 420px;
}

.hero-visual img {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

@media (max-width: 899px) {
    .hero {
        min-height: auto;
        padding: 100px 20px 56px;
    }
    .hero-content {
        flex-direction: column;
        gap: 28px;
    }
    .hero-visual {
        max-width: 320px;
    }
    .hero-visual img {
        max-height: 220px;
        object-fit: cover;
        object-position: center top;
    }
    .hero-lead {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 88px 16px 48px;
    }
    .hero-badge {
        font-size: 0.75rem;
        padding: 6px 12px;
        margin-bottom: 16px;
    }
    .hero-title {
        font-size: clamp(1.65rem, 8vw, 2rem);
        margin-bottom: 12px;
    }
    .hero-lead {
        font-size: 0.875rem;
        margin-bottom: 20px;
    }
    .hero-visual {
        max-width: 280px;
    }
    .hero-visual img {
        max-height: 180px;
    }
    .hero-cta .btn {
        width: 100%;
        max-width: 100%;
        min-height: 48px;
        padding: 14px 20px;
    }
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    padding: 8px 16px;
    margin-bottom: 24px;
    border-radius: 999px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5.5vw, 3rem);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: 0.02em;
    margin-bottom: 16px;
}
.hero-title-accent {
    display: block;
    margin-top: 4px;
}

.hero-lead {
    font-size: 0.95rem;
    line-height: 1.8;
    opacity: 0.95;
    margin-bottom: 28px;
}

.hero-cta .btn {
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
}

.btn-hero-primary {
    background: #fff;
    color: var(--color-primary) !important;
    border: none;
}
.btn-hero-primary:hover {
    background: var(--color-bg);
    color: var(--color-primary-dark) !important;
    transform: translateY(1px);
}

/* ----- ZEP Preview ----- */
.zep-preview {
    padding: 56px 0;
    background: var(--color-bg-alt);
}
.zep-desc {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    max-width: 640px;
    margin: 0 auto 32px;
    line-height: 1.7;
}
.zep-gallery {
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin-bottom: 24px;
}
.zep-figure {
    margin: 0;
    text-align: center;
}
.zep-figure img {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
}
.zep-figure figcaption {
    margin-top: 12px;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}
.zep-note {
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 8px;
    line-height: 1.6;
}
.zep-note-sub {
    margin-top: 4px;
    font-weight: 500;
    color: var(--color-primary);
}

/* ----- Sections common ----- */
.section {
    padding: 72px 0;
}
.section:nth-child(even) {
    background: var(--color-bg-alt);
}
.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    color: var(--color-text);
    text-align: center;
    margin-bottom: 12px;
}
.section-lead {
    text-align: center;
    color: var(--color-text-muted);
    max-width: 560px;
    margin: 0 auto 40px;
    font-size: 0.95rem;
}

@media (max-width: 599px) {
    .section {
        padding: 48px 0;
    }
    .section-lead {
        margin-bottom: 28px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 40px 0;
    }
    .section-title {
        font-size: clamp(1.35rem, 5.5vw, 1.75rem);
        margin-bottom: 10px;
    }
}

/* ----- Worries ----- */
.worries-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}
@media (max-width: 640px) {
    .worries-grid {
        grid-template-columns: 1fr;
    }
}
.worries-card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--color-border);
}
.worries-card h3 {
    font-size: 1.05rem;
    color: var(--color-primary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-primary-light);
}
.worries-card ul {
    list-style: none;
}
.worries-card li {
    padding: 4px 0;
    padding-left: 1.2em;
    position: relative;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}
.worries-card li::before {
    content: '・';
    position: absolute;
    left: 0;
    color: var(--color-primary-light);
}
.worries-cta {
    text-align: center;
    font-weight: 600;
    color: var(--color-primary);
}

/* ----- Reasons ----- */
.reasons-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
@media (max-width: 768px) {
    .reasons-grid {
        grid-template-columns: 1fr;
    }
}
.reason-card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 28px 24px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--color-border);
    text-align: center;
}
.reason-icon {
    display: block;
    font-size: 2rem;
    margin-bottom: 16px;
}
.reason-card h3 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 12px;
}
.reason-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ----- Director ----- */
.director-inner {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 40px;
    align-items: start;
    max-width: 800px;
    margin: 0 auto;
}
@media (max-width: 640px) {
    .director-inner {
        grid-template-columns: 1fr;
    }
}
.director-profile {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--color-border);
    text-align: center;
}
.director-photo {
    width: 100%;
    max-width: 200px;
    height: auto;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 50%;
    margin: 0 auto 16px;
    display: block;
    border: 3px solid var(--color-border);
}
.director-profile h3 {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: 4px;
}
.director-name {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}
.director-years {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}
.director-quote {
    font-size: 0.9rem;
    color: var(--color-primary);
    font-style: italic;
}
.director-bio h4 {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 12px;
}
.director-bio ul {
    margin-bottom: 16px;
    padding-left: 1.2em;
}
.director-bio li {
    margin-bottom: 6px;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}
.director-bio p {
    margin-bottom: 12px;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}
.director-points {
    list-style: none !important;
    padding-left: 0 !important;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 16px;
}
.director-points li {
    font-size: 0.9rem;
    color: var(--color-primary);
    font-weight: 500;
}

@media (max-width: 480px) {
    .director-inner {
        gap: 24px;
    }
    .director-profile {
        padding: 20px;
    }
    .director-points {
        grid-template-columns: 1fr;
    }
}

/* ----- Results ----- */
.results-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}
.results-block {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 20px 24px;
    border: 1px solid var(--color-border);
}
.results-block h3 {
    font-size: 1rem;
    color: var(--color-primary);
    margin-bottom: 10px;
}
.results-block p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}
.results-note {
    text-align: center;
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--color-primary);
    font-weight: 500;
}

/* ----- Futoko ----- */
.futoko {
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, rgba(15, 118, 110, 0.06) 100%);
}
.futoko-lead {
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 32px;
}
.futoko-inner {
    max-width: 640px;
    margin: 0 auto;
    background: var(--color-card);
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--color-border);
}
.futoko-inner h3 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 16px;
}
.futoko-inner p {
    margin-bottom: 12px;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}
.futoko-points {
    list-style: none;
    margin: 20px 0;
}
.futoko-points li {
    padding: 6px 0;
    color: var(--color-text);
    font-size: 0.95rem;
}
.futoko-cta {
    margin-top: 24px;
    text-align: center;
}

@media (max-width: 480px) {
    .futoko-inner {
        padding: 24px 20px;
    }
    .futoko-lead {
        font-size: 1.05rem;
    }
}

/* ----- Area ----- */
.area-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
@media (max-width: 768px) {
    .area-grid {
        grid-template-columns: 1fr;
    }
}
.area-card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--color-border);
}
.area-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 12px;
}
.area-card h3 {
    font-size: 1rem;
    color: var(--color-primary);
    margin-bottom: 10px;
}
.area-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ----- Contents ----- */
.contents-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
@media (max-width: 768px) {
    .contents-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 480px) {
    .contents-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .content-item {
        padding: 16px;
    }
}
.content-item {
    background: var(--color-card);
    border-radius: var(--radius-sm);
    padding: 20px;
    border: 1px solid var(--color-border);
    text-align: center;
}
.content-icon {
    font-size: 1.5rem;
    display: block;
    margin-bottom: 8px;
}
.content-item h3 {
    font-size: 0.95rem;
    color: var(--color-text);
    margin-bottom: 6px;
}
.content-item p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ----- Env ----- */
.env-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
@media (max-width: 768px) {
    .env-grid {
        grid-template-columns: 1fr;
    }
}
.env-card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--color-border);
}
.env-icon {
    font-size: 1.5rem;
    display: block;
    margin-bottom: 12px;
}
.env-card h3 {
    font-size: 1rem;
    color: var(--color-primary);
    margin-bottom: 10px;
}
.env-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ----- Course ----- */
.course-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}
@media (max-width: 640px) {
    .course-cards {
        grid-template-columns: 1fr;
    }
}
.course-card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 28px;
    border: 2px solid var(--color-border);
    position: relative;
}
.course-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-soft);
}
.course-card h3 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 12px;
}
.course-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}
.course-price {
    font-weight: 700;
    color: var(--color-text) !important;
    margin-top: 12px !important;
}
.course-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.7rem;
    padding: 4px 10px;
    border-radius: 999px;
}
.course-subtitle {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: 8px;
}
.course-note {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}
.course-card-small {
    padding: 20px;
}
.course-disclaimer {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-align: center;
}

/* ----- Blog ----- */
.blog-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
@media (max-width: 768px) {
    .blog-cards {
        grid-template-columns: 1fr;
    }
}
.blog-card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
}
.blog-icon {
    font-size: 1.5rem;
    margin-bottom: 12px;
}
.blog-card h3 {
    font-size: 1rem;
    color: var(--color-primary);
    margin-bottom: 10px;
}
.blog-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    flex: 1;
    margin-bottom: 16px;
}
.blog-card .btn {
    margin-top: auto;
    align-self: flex-start;
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
}
.btn-outline:hover {
    background: var(--color-primary);
    color: #fff !important;
}

/* ----- Contact ----- */
.contact {
    background: linear-gradient(135deg, #0f766e 0%, #0d9488 100%);
    color: #fff;
}
.contact .section-title {
    color: #fff;
}
.contact-lead {
    text-align: center;
    margin-bottom: 28px;
    opacity: 0.95;
}
.contact-cta {
    text-align: center;
}
.btn-lg {
    padding: 16px 32px;
    font-size: 1.05rem;
    min-height: 52px;
}

@media (max-width: 480px) {
    .contact-lead {
        font-size: 0.9rem;
        margin-bottom: 24px;
    }
    .contact-cta .btn {
        width: 100%;
        max-width: 100%;
        display: block;
    }
}
.contact .btn-primary {
    background: #fff;
    color: var(--color-primary) !important;
}
.contact .btn-primary:hover {
    background: var(--color-bg);
    color: var(--color-primary-dark) !important;
}

/* ----- Buttons ----- */
.btn {
    display: inline-block;
    padding: 14px 24px;
    min-height: 48px;
    box-sizing: border-box;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
    transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
}
.btn:hover {
    transform: translateY(1px);
}
.btn-primary {
    background: var(--color-primary);
    color: #fff !important;
    border: none;
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    color: #fff !important;
}

/* ----- Footer ----- */
.footer {
    background: var(--color-text);
    color: rgba(255, 255, 255, 0.85);
    padding: 40px 20px;
    text-align: center;
}
.footer-name {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 6px;
}
.footer-addr {
    font-size: 0.85rem;
    margin-bottom: 20px;
    opacity: 0.9;
}
.footer-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 20px;
    margin-bottom: 24px;
}
.footer-nav a {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
}
.footer-nav a:hover {
    color: #fff;
    text-decoration: underline;
}
.footer-copy {
    font-size: 0.8rem;
    opacity: 0.7;
    margin-bottom: 8px;
}
.footer-desc {
    font-size: 0.75rem;
    opacity: 0.6;
}

@media (max-width: 599px) {
    .footer {
        padding: 32px 20px;
    }
    .footer-nav {
        gap: 10px 16px;
    }
}

@media (max-width: 480px) {
    .footer {
        padding: 28px 16px;
    }
    .footer-name {
        font-size: 1rem;
    }
    .footer-addr {
        font-size: 0.8rem;
        margin-bottom: 16px;
    }
    .footer-nav {
        flex-direction: column;
        gap: 8px;
        margin-bottom: 20px;
    }
    .footer-nav a {
        font-size: 0.85rem;
    }
}

/* タッチ操作向け・小画面の余白 */
@media (max-width: 480px) {
    .worries-card,
    .reason-card,
    .area-card,
    .env-card {
        padding: 20px;
    }
    .course-card {
        padding: 22px;
    }
    .blog-card {
        padding: 20px;
    }
    .zep-preview {
        padding: 40px 0;
    }
    .zep-desc {
        font-size: 0.9rem;
        margin-bottom: 24px;
    }
}