/* =====================================================
   友好音楽祭オーケストラ - スタイルシート
   ===================================================== */

/* ----- CSS Variables ----- */
:root {
    /* Colors */
    --color-primary: #052652;
    --color-secondary: #36485f;
    --color-accent: #c9a962;
    --color-accent-light: #d4b978;
    --color-text: #1a1a1a;
    --color-text-light: #666666;
    --color-white: #ffffff;
    --color-bg: #f8f9fa;
    --color-bg-dark: #0a0a0a;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #052652 0%, #36485f 100%);
    --gradient-dark: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 100%);

    /* Typography */
    --font-serif-en: 'Cormorant Garamond', serif;
    --font-serif-jp: 'Noto Serif JP', serif;
    --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --section-padding: 100px;
    --container-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.2);
}

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

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

body {
    font-family: var(--font-serif-jp), var(--font-system);
    color: var(--color-text);
    line-height: 1.8;
    background-color: var(--color-white);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

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

/* ----- Utility Classes ----- */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: var(--section-padding) 0;
}

.section--dark {
    background: var(--gradient-primary);
    color: var(--color-white);
}

.section__header {
    text-align: center;
    margin-bottom: 60px;
}

.section__subtitle {
    display: block;
    font-family: var(--font-serif-en);
    font-size: 0.875rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 10px;
}

.section__title {
    font-family: var(--font-serif-jp);
    font-size: 2.5rem;
    font-weight: 500;
    letter-spacing: 0.1em;
}

/* ----- Buttons ----- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-family: var(--font-serif-jp);
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

.btn--primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.section--dark .btn--outline {
    color: var(--color-white);
    border-color: var(--color-white);
}

.section--dark .btn--outline:hover {
    background: var(--color-white);
    color: var(--color-primary);
}

/* =====================================================
   HEADER
   ===================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(5, 38, 82, 0.95);
    padding: 15px 0;
    box-shadow: var(--shadow-md);
}

.header__container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header__logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-white);
}

.header__logo-icon {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.header__logo-text {
    display: flex;
    flex-direction: column;
}

.header__logo-ja {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.1em;
}

.header__logo-en {
    font-family: var(--font-serif-en);
    font-size: 0.625rem;
    letter-spacing: 0.1em;
    opacity: 0.8;
}

.header__nav {
    display: flex;
    align-items: center;
    gap: 40px;
}

.header__nav-list {
    display: flex;
    gap: 30px;
}

.header__nav-link {
    font-family: var(--font-serif-en);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    color: var(--color-white);
    position: relative;
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width var(--transition-normal);
}

.header__nav-link:hover::after {
    width: 100%;
}

.header__nav-label {
    display: block;
    font-family: var(--font-serif-jp);
    font-size: 0.625rem;
    letter-spacing: 0.05em;
    opacity: 0.7;
    margin-top: 2px;
}

/* ----- Language Switcher Tabs ----- */
.header__lang-tabs {
    display: flex;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    padding: 2px;
    gap: 2px;
}

.header__lang-tab {
    padding: 5px 10px;
    background: transparent;
    border: none;
    border-radius: 3px;
    color: rgba(255, 255, 255, 0.6);
    font-family: var(--font-serif-en);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.header__lang-tab:hover {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.1);
}

.header__lang-tab.active {
    background: var(--color-accent);
    color: var(--color-primary);
}

.header__social {
    display: flex;
    gap: 15px;
}

.header__social a {
    color: var(--color-white);
    font-size: 1rem;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.header__social a:hover {
    opacity: 1;
    color: var(--color-accent);
}

.header__menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.header__menu-bar {
    width: 25px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--transition-normal);
}

/* =====================================================
   HERO SECTION
   ===================================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-dark);
    overflow: hidden;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 80%, rgba(201, 169, 98, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(5, 38, 82, 0.3) 0%, transparent 50%);
}

.hero__content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-white);
    padding: 0 20px;
}

.hero__title {
    margin-bottom: 30px;
}

.hero__title-ja {
    display: block;
    font-size: 3.5rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    margin-bottom: 15px;
}

.hero__title-en {
    display: block;
    font-family: var(--font-serif-en);
    font-size: 1.25rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    color: var(--color-accent);
}

.hero__tagline {
    font-size: 1.25rem;
    font-weight: 400;
    line-height: 2;
    letter-spacing: 0.1em;
    margin-bottom: 50px;
    opacity: 0.9;
}

.hero__cta {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--color-white);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    transition: color var(--transition-fast);
}

.hero__cta:hover {
    color: var(--color-accent);
}

.hero__cta i {
    font-size: 1.25rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(10px);
    }
    60% {
        transform: translateY(5px);
    }
}

.hero__scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--color-white);
    opacity: 0.6;
}

.hero__scroll-indicator span {
    font-family: var(--font-serif-en);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    writing-mode: vertical-rl;
}

.hero__scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-white), transparent);
    animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
    0% {
        transform: scaleY(0);
        transform-origin: top;
    }
    50% {
        transform: scaleY(1);
        transform-origin: top;
    }
    51% {
        transform: scaleY(1);
        transform-origin: bottom;
    }
    100% {
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

/* =====================================================
   ABOUT SECTION
   ===================================================== */
.about__image {
    margin-bottom: 50px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about__image img {
    width: 100%;
    height: auto;
    max-height: 500px;
    object-fit: cover;
}

.about__image-credit {
    text-align: right;
    font-size: 0.75rem;
    color: var(--color-text-light);
    padding: 10px 15px;
    background: var(--color-bg);
}

.about__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.about__text {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about__lead {
    font-size: 1.125rem;
    font-weight: 500;
    line-height: 2;
}

.about__text p {
    color: var(--color-text-light);
    line-height: 2;
}

.about__features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    align-content: center;
}

.about__feature {
    text-align: center;
    padding: 30px 20px;
    background: var(--color-bg);
    border-radius: 8px;
    transition: transform var(--transition-normal);
}

.about__feature:hover {
    transform: translateY(-5px);
}

.about__feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    color: var(--color-white);
    font-size: 1.5rem;
}

.about__feature-title {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 8px;
}

.about__feature-text {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.about__artists {
    background: var(--color-bg);
    padding: 40px;
    border-radius: 8px;
}

.about__artists-title {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 25px;
    text-align: center;
}

.about__artists-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 15px;
}

.about__artists-list li {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 6px 10px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    word-break: keep-all;
}

.about__artists-list li span {
    font-size: 0.8125rem;
    color: var(--color-text-light);
    word-break: keep-all;
    white-space: nowrap;
}

/* =====================================================
   CONCERTS SECTION
   ===================================================== */
.concert--featured {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 50px;
    margin-bottom: 60px;
    position: relative;
    backdrop-filter: blur(10px);
}

.concert__badge {
    position: absolute;
    top: -15px;
    left: 50px;
    background: var(--color-accent);
    color: var(--color-primary);
    padding: 8px 20px;
    font-family: var(--font-serif-en);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    border-radius: 4px;
}

.concert__content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 40px;
    margin-bottom: 30px;
}

.concert__title {
    font-size: 1.75rem;
    font-weight: 500;
    margin-bottom: 30px;
    line-height: 1.5;
}

.concert__info {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.concert__info-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.concert__info-item i {
    color: var(--color-accent);
    font-size: 1.25rem;
    margin-top: 3px;
}

.concert__info-item strong {
    display: block;
    font-weight: 500;
}

.concert__info-item span {
    font-size: 0.875rem;
    opacity: 0.8;
}

.concert__program h4,
.concert__performers h4 {
    font-family: var(--font-serif-en);
    font-size: 0.875rem;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: 15px;
}

.concert__program ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.concert__program li {
    padding-left: 20px;
    position: relative;
}

.concert__program li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.75em;
    width: 8px;
    height: 1px;
    background: var(--color-accent);
}

.concert__performers {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.concert__performer {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.concert__performer-role {
    font-size: 0.75rem;
    color: var(--color-accent);
    letter-spacing: 0.1em;
}

.concert__performer-name {
    font-size: 1.125rem;
    font-weight: 500;
}

.concert__performer-note {
    font-size: 0.8125rem;
    opacity: 0.7;
}

.concert__actions {
    text-align: center;
}

/* Upcoming Concerts */
.concerts__upcoming-title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.concerts__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.concert-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    transition: transform var(--transition-normal);
}

.concert-card:hover {
    transform: translateY(-5px);
}

.concert-card__date {
    background: var(--color-accent);
    color: var(--color-primary);
    padding: 25px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 100px;
}

.concert-card__month {
    font-family: var(--font-serif-en);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

.concert-card__day {
    font-family: var(--font-serif-en);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.concert-card__weekday {
    font-family: var(--font-serif-en);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

.concert-card__content {
    padding: 25px;
    flex: 1;
}

.concert-card__title {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.concert-card__venue,
.concert-card__time {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-bottom: 5px;
}

.concert-card__venue i,
.concert-card__time i {
    color: var(--color-accent);
    margin-right: 8px;
}

.concert-card__program {
    margin: 15px 0;
    padding: 15px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.concert-card__program p {
    font-size: 0.8125rem;
    opacity: 0.9;
    margin-bottom: 5px;
}

.concert-card__performers {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-bottom: 15px;
}

.concert-card__performers span {
    font-size: 0.8125rem;
    opacity: 0.7;
}

.concert-card__link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--color-accent);
    transition: opacity var(--transition-fast);
}

.concert-card__link:hover {
    opacity: 0.8;
}

/* =====================================================
   PAST CONCERTS SECTION
   ===================================================== */
.past-concerts__list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 40px;
}

.past-concert {
    display: flex;
    gap: 30px;
    padding: 30px;
    background: var(--color-white);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-normal);
}

.past-concert:hover {
    box-shadow: var(--shadow-md);
}

.past-concert__number {
    font-family: var(--font-serif-en);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    min-width: 60px;
}

.past-concert__number .ordinal-suffix {
    font-size: 0.6em;
    font-weight: 400;
    vertical-align: super;
    margin-left: 1px;
}

.past-concert__content {
    flex: 1;
}

.past-concert__date {
    font-family: var(--font-serif-en);
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: 5px;
}

.past-concert__title {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 8px;
}

.past-concert__venue {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: 15px;
}

.past-concert__program {
    margin-bottom: 15px;
}

.past-concert__program p {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: 5px;
}

.past-concert__performers {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.past-concert__performers span {
    font-size: 0.8125rem;
    color: var(--color-text-light);
}

.past-concert__note {
    display: inline-block;
    margin-top: 10px;
    padding: 5px 12px;
    background: rgba(201, 169, 98, 0.1);
    color: var(--color-accent);
    font-size: 0.8125rem;
    border-radius: 4px;
}

.past-concerts__more {
    text-align: center;
}

/* =====================================================
   CONTACT SECTION
   ===================================================== */
.contact__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 800px;
    margin: 0 auto;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

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

.contact__icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    font-size: 1.25rem;
    color: var(--color-accent);
}

.contact__detail h4 {
    font-family: var(--font-serif-en);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 5px;
}

.contact__detail a {
    font-size: 1rem;
    transition: color var(--transition-fast);
}

.contact__detail a:hover {
    color: var(--color-accent);
}

.contact__social h4 {
    font-family: var(--font-serif-en);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.contact__social-links {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact__social-link {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    transition: background var(--transition-fast);
}

.contact__social-link:hover {
    background: rgba(255, 255, 255, 0.2);
}

.contact__social-link i {
    font-size: 1.25rem;
}

/* Contact Form */
.contact__form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact__form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contact__form-group label {
    font-family: var(--font-serif-en);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    color: var(--color-accent);
}

.contact__form-group input,
.contact__form-group textarea {
    padding: 15px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    color: var(--color-white);
    font-family: var(--font-serif-jp);
    font-size: 1rem;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.contact__form-group input::placeholder,
.contact__form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.contact__form-group input:focus,
.contact__form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.15);
}

.contact__form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact__form-submit {
    align-self: flex-start;
    margin-top: 10px;
}

.contact__form-submit:hover {
    transform: translateY(-2px);
}

.contact__lead {
    font-size: 1.125rem;
    line-height: 2;
    margin-bottom: 30px;
    opacity: 0.9;
}

.contact__btn {
    padding: 18px 35px;
}

.contact__phone {
    margin-bottom: 25px;
}

.contact__phone-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact__phone-item .contact__detail h4 {
    font-family: var(--font-serif-en);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: 3px;
}

.contact__phone-item .phone-display {
    font-size: 1.25rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--color-white);
}

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
    background: var(--color-bg-dark);
    color: var(--color-white);
    padding: 60px 0 30px;
}

.footer__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 30px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer__logo-icon {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.footer__logo-text {
    display: flex;
    flex-direction: column;
}

.footer__logo-ja {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.1em;
}

.footer__logo-en {
    font-family: var(--font-serif-en);
    font-size: 0.625rem;
    letter-spacing: 0.1em;
    opacity: 0.7;
}

.footer__social {
    display: flex;
    gap: 20px;
}

.footer__social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.footer__social a:hover {
    background: var(--color-accent);
    color: var(--color-primary);
}

.footer__bottom {
    text-align: center;
}

.footer__copyright {
    font-size: 0.8125rem;
    opacity: 0.7;
    margin-bottom: 5px;
}

.footer__credit {
    font-size: 0.75rem;
    opacity: 0.5;
}

/* =====================================================
   ANIMATIONS
   ===================================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* =====================================================
   RESPONSIVE
   ===================================================== */

/* Tablet */
@media (max-width: 840px) {
    :root {
        --section-padding: 80px;
    }

    .section__title {
        font-size: 2rem;
    }

    .hero__title-ja {
        font-size: 2.5rem;
    }

    .hero__title-en {
        font-size: 1rem;
    }

    .about__content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about__features {
        grid-template-columns: repeat(3, 1fr);
    }

    .concert__content {
        grid-template-columns: 1fr;
    }

    .concerts__grid {
        grid-template-columns: 1fr;
    }

    .concert-card {
        flex-direction: column;
    }

    .concert-card__date {
        flex-direction: row;
        gap: 15px;
        padding: 15px 25px;
    }

    .contact__content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

/* Mobile */
@media (max-width: 540px) {
    :root {
        --section-padding: 60px;
    }

    html {
        font-size: 15px;
    }

    .section__header {
        margin-bottom: 40px;
    }

    .section__title {
        font-size: 1.75rem;
    }

    /* Header Mobile */
    .header__nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--gradient-primary);
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        padding: 40px;
        gap: 30px;
        transition: right var(--transition-normal);
    }

    .header__nav.active {
        right: 0;
    }

    .header__nav-list {
        flex-direction: column;
        gap: 20px;
    }

    .header__nav-link {
        font-size: 1.125rem;
    }

    .header__menu-toggle {
        display: flex;
        z-index: 1001;
    }

    .header__menu-toggle.active .header__menu-bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .header__menu-toggle.active .header__menu-bar:nth-child(2) {
        opacity: 0;
    }

    .header__menu-toggle.active .header__menu-bar:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .header__logo-ja {
        font-size: 0.75rem;
        white-space: nowrap;
    }

    .header__logo-en {
        display: none;
    }

    /* Hero Mobile */
    .hero__title-ja {
        font-size: 2rem;
    }

    .hero__title-en {
        font-size: 0.875rem;
    }

    .hero__tagline {
        font-size: 1rem;
    }

    /* About Mobile */
    .about__features {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .about__feature {
        display: flex;
        gap: 20px;
        text-align: left;
        padding: 20px;
    }

    .about__feature-icon {
        margin: 0;
        flex-shrink: 0;
    }

    .about__artists {
        padding: 25px;
    }

    .about__artists-list {
        grid-template-columns: 1fr;
    }

    /* Artist list: block layout on mobile for proper line breaks */
    .about__artists-list li {
        display: block;
        padding: 12px 0;
    }

    .about__artists-list li span {
        display: block;
        margin-top: 4px;
        font-size: 0.75rem;
    }

    /* Concerts Mobile */
    .concert--featured {
        padding: 30px 20px;
    }

    .concert__badge {
        left: 20px;
    }

    .concert__title {
        font-size: 1.375rem;
    }

    /* Past Concerts Mobile */
    .past-concert {
        flex-direction: column;
        gap: 15px;
        padding: 20px;
    }

    .past-concert__number {
        font-size: 2rem;
    }

    /* Footer Mobile */
    .footer__content {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }

    .footer__logo {
        flex-direction: column;
    }
}

/* Very Small Mobile */
@media (max-width: 380px) {
    .header__logo-ja {
        font-size: 0.6875rem;
    }

    .hero__title-ja {
        font-size: 1.625rem;
    }
}

/* Japanese text word break control */
.hero__title-ja,
.header__logo-ja,
.footer__logo-ja {
    word-break: keep-all;
    overflow-wrap: break-word;
}

/* SP only line break - hidden on PC */
.sp-only {
    display: none;
}

@media (max-width: 540px) {
    .sp-only {
        display: inline;
    }
}