/* ========================================
   Exhibition Invitation - Mobile First
   ======================================== */

.invitation-page {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.invitation-page main {
    display: block;
}

/* Container */
.inv-container {
    width: 100%;
    max-width: 560px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Labels */
.inv-label {
    display: block;
    font-size: 0.72rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--color-accent-warm);
    font-weight: 500;
    margin-bottom: 1.25rem;
}

.inv-label--light {
    color: var(--color-accent-warm);
}

/* Headings */
.inv-heading {
    font-size: 1.6rem;
    font-weight: 500;
    letter-spacing: var(--letter-spacing-tight);
    line-height: 1.3;
    margin-bottom: 1.5rem;
    color: var(--color-text-primary);
}

.inv-heading--light {
    color: var(--color-text-light);
}

/* Text */
.inv-text {
    font-size: 0.98rem;
    line-height: 1.85;
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
    word-break: keep-all;
    word-wrap: break-word;
}

.inv-text--muted {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    margin-top: -0.75rem;
    margin-bottom: 1.75rem;
}

/* ===== HERO ===== */
.inv-hero {
    position: relative;
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
    background-color: #0a0a0a;
}

.inv-hero__image {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.inv-hero__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: grayscale(10%) brightness(0.85);
}

.inv-hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom,
        rgba(10, 10, 10, 0.3) 0%,
        rgba(10, 10, 10, 0.55) 50%,
        rgba(10, 10, 10, 0.95) 100%);
}

.inv-hero__content {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: 3rem 1.5rem 5rem;
    color: var(--color-text-light);
    text-align: left;
}

.inv-hero__label {
    display: block;
    font-size: 0.7rem;
    letter-spacing: 0.35em;
    color: var(--color-accent-warm);
    margin-bottom: 2rem;
    font-weight: 500;
}

.inv-hero__title {
    font-size: clamp(2.6rem, 10vw, 4rem);
    font-weight: 300;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 2rem;
    color: var(--color-text-light);
}

.inv-hero__artist {
    font-size: 1rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 0.5rem;
}

.inv-hero__period {
    font-size: 0.88rem;
    letter-spacing: 0.15em;
    color: var(--color-accent-warm);
    font-weight: 500;
}

.inv-hero__scroll {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    width: 1px;
    height: 32px;
    overflow: hidden;
}

.inv-hero__scroll span {
    display: block;
    width: 1px;
    height: 100%;
    background-color: var(--color-accent-warm);
    animation: scrollLine 2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    transform-origin: top;
}

@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; }
}

/* ===== SECTIONS ===== */
.inv-section {
    padding: 4.5rem 0;
}

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

.inv-section--dark {
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
}

.inv-section--dark .inv-text {
    color: rgba(255, 255, 255, 0.72);
}

/* ===== STATEMENT ===== */
.inv-statement {
    padding-top: 5rem;
}

.inv-quote {
    font-size: 1.4rem;
    font-weight: 300;
    line-height: 1.7;
    letter-spacing: -0.01em;
    color: var(--color-text-primary);
    margin: 0 0 2.5rem;
    padding: 0;
    text-align: center;
    position: relative;
    font-style: normal;
}

.inv-quote::before,
.inv-quote::after {
    content: '';
    display: block;
    width: 32px;
    height: 1px;
    background-color: var(--color-accent-warm);
    margin: 1.25rem auto;
}

/* ===== CV (career) ===== */
.inv-cv {
    margin-top: 2.5rem;
    margin-bottom: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.inv-cv__group {
    margin-bottom: 2rem;
}

.inv-cv__group:last-child {
    margin-bottom: 0;
}

.inv-cv__title {
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-accent-warm);
    font-weight: 500;
    margin-bottom: 1rem;
}

.inv-cv__list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.inv-cv__list li {
    display: flex;
    gap: 1rem;
    font-size: 0.92rem;
    line-height: 1.75;
    color: var(--color-text-secondary);
    padding: 0.35rem 0;
    word-break: keep-all;
}

.inv-cv__year {
    flex-shrink: 0;
    width: 48px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* ===== FEATURED WORKS ===== */
.inv-works {
    background-color: var(--color-bg-primary);
}

.inv-work {
    margin: 0 0 3rem;
    padding: 0;
}

.inv-work:last-of-type {
    margin-bottom: 0;
}

.inv-work__image {
    width: 100%;
    margin-bottom: 1.25rem;
    overflow: hidden;
    background-color: var(--color-bg-secondary);
    display: flex;
    justify-content: center;
    align-items: center;
}

.inv-work__image img {
    max-width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-slow);
}

.inv-work:hover .inv-work__image img {
    transform: scale(1.03);
}

.inv-work__caption {
    padding: 0 0.25rem;
}

.inv-work__title {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: 0.35rem;
    letter-spacing: -0.01em;
}

.inv-work__meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    letter-spacing: 0.03em;
    line-height: 1.6;
}

/* ===== INFO ===== */
.inv-info {
    margin: 0;
    padding: 0;
}

.inv-info__item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 1rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    align-items: start;
}

.inv-info__item:last-child {
    border-bottom: none;
}

.inv-info__item dt {
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    color: var(--color-accent-warm);
    font-weight: 500;
    padding-top: 0.15rem;
}

.inv-info__item dd {
    margin: 0;
    font-size: 0.98rem;
    line-height: 1.7;
    color: var(--color-text-light);
    font-weight: 300;
}

.inv-info__sub {
    display: inline-block;
    margin-top: 0.35rem;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.55);
}

/* ===== LOCATION ===== */
.inv-location {
    background-color: #F6F3E9;
    text-align: center;
}

.inv-location__header {
    text-align: center;
    margin-bottom: 2rem;
}

.inv-location .inv-label,
.inv-location .inv-heading {
    text-align: center;
}

.inv-location .inv-heading {
    margin-bottom: 0;
}

.inv-location__brand {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1.5rem;
}

.inv-location__brand img {
    width: 220px;
    height: auto;
    max-width: 60%;
    display: block;
}

.inv-location__info {
    margin: 0 auto 2.5rem;
    max-width: 400px;
}

.inv-location__divider {
    width: 40px;
    height: 1px;
    background-color: var(--color-accent-warm);
    margin: 0 auto 2rem;
    opacity: 0.5;
}

.inv-location__divider:last-child {
    margin: 2rem auto 0;
}

.inv-address {
    font-size: 1.08rem;
    line-height: 1.9;
    color: var(--color-text-primary);
    font-weight: 400;
    text-align: center;
    margin-bottom: 1.25rem;
    letter-spacing: 0.01em;
}

.inv-tel {
    text-align: center;
    margin-bottom: 0;
}

.inv-tel a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    letter-spacing: 0.05em;
    padding: 0.3rem 0;
    transition: color var(--transition-fast);
}

.inv-tel a:hover {
    color: var(--color-text-primary);
}

.inv-tel svg {
    color: var(--color-accent-warm);
}

.inv-parking {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    margin-bottom: 0;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.05em;
}

.inv-parking svg {
    color: var(--color-accent-warm);
}

.inv-map-btns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.6rem;
    max-width: 480px;
    margin: 0 auto;
}

.inv-map-btn {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    padding: 1.1rem 0.4rem;
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--color-text-primary);
    background-color: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    transition: all var(--transition-fast);
    min-height: 76px;
    overflow: hidden;
}

.inv-map-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--btn-accent, transparent);
    opacity: 0.9;
}

.inv-map-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.inv-map-btn:active {
    transform: translateY(0);
}

.inv-map-btn__icon {
    display: inline-flex;
    width: 20px;
    height: 20px;
    color: var(--btn-accent);
}

.inv-map-btn__icon svg {
    width: 100%;
    height: 100%;
}

.inv-map-btn__label {
    color: var(--color-text-primary);
    font-weight: 500;
}

.inv-map-btn--naver {
    --btn-accent: #03C75A;
}

.inv-map-btn--kakao {
    --btn-accent: #FEE500;
}

.inv-map-btn--kakao .inv-map-btn__icon {
    color: #191919;
}

.inv-map-btn--kakao::before {
    opacity: 1;
}

.inv-map-btn--google {
    --btn-accent: #4285F4;
}

/* ===== CTA ===== */
.inv-cta {
    position: relative;
    background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
    color: var(--color-text-light);
    text-align: center;
    padding: 5.5rem 0 6rem;
    overflow: hidden;
}

.inv-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, transparent, var(--color-accent-warm));
}

.inv-cta__ornament {
    display: flex;
    justify-content: center;
    margin-top: 1.5rem;
    margin-bottom: 2.5rem;
    color: var(--color-accent-warm);
    opacity: 0.8;
}

.inv-cta__text {
    font-size: 1.15rem;
    line-height: 2;
    color: rgba(255, 255, 255, 0.88);
    font-weight: 300;
    margin-bottom: 3rem;
    word-break: keep-all;
    letter-spacing: 0.02em;
}

.inv-cta__btns {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    align-items: center;
}

.inv-cta .inv-btn--filled {
    background-color: transparent;
    color: var(--color-text-light);
    border: 1px solid rgba(255, 255, 255, 0.4);
    padding: 1rem 1.75rem;
    font-family: inherit;
    cursor: pointer;
}

.inv-cta .inv-btn--filled:hover {
    background-color: var(--color-text-light);
    color: #0f0f0f;
    border-color: var(--color-text-light);
}

#inv-share-btn {
    background-color: var(--color-accent-warm);
    color: #1a1a1a;
    border-color: var(--color-accent-warm);
}

#inv-share-btn:hover {
    background-color: var(--color-accent-warm-hover);
    border-color: var(--color-accent-warm-hover);
    color: #1a1a1a;
}

.inv-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translate(-50%, 20px);
    padding: 0.85rem 1.5rem;
    font-size: 0.88rem;
    color: #fff;
    background-color: rgba(20, 20, 20, 0.92);
    border-radius: var(--radius-full);
    letter-spacing: 0.02em;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    z-index: 9999;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    white-space: nowrap;
}

.inv-toast.is-visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

/* ===== BUTTONS ===== */
.inv-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.95rem 1.75rem;
    font-size: 0.92rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    text-decoration: none;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    min-height: 48px;
    box-sizing: border-box;
    cursor: pointer;
}

.inv-btn--outline {
    background-color: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-text-primary);
}

.inv-btn--outline:hover {
    background-color: var(--color-text-primary);
    color: var(--color-text-light);
}

.inv-btn--filled {
    background-color: var(--color-text-primary);
    color: var(--color-text-light);
    border: 1px solid var(--color-text-primary);
}

.inv-btn--filled:hover {
    background-color: transparent;
    color: var(--color-text-primary);
}

.inv-btn svg {
    transition: transform var(--transition-fast);
}

.inv-btn:hover svg {
    transform: translateX(2px);
}

/* ===== FOOTER ===== */
.inv-footer {
    padding: 3rem 1.5rem 2.5rem;
    text-align: center;
    background-color: #0a0a0a;
    color: var(--color-text-light);
}

.inv-footer__logo {
    font-size: 1.05rem;
    letter-spacing: 0.08em;
    font-weight: 500;
    margin-bottom: 0.3rem;
}

.inv-footer__sub {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 2rem;
    letter-spacing: 0.05em;
}

.inv-footer__copy {
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.35);
    letter-spacing: 0.05em;
}

/* ===== TABLET ===== */
@media (min-width: 600px) {
    .inv-container {
        max-width: 640px;
        padding: 0 2rem;
    }

    .inv-section {
        padding: 6rem 0;
    }

    .inv-hero__content {
        padding: 3rem 2.5rem 6rem;
    }

    .inv-heading {
        font-size: 2rem;
    }

    .inv-quote {
        font-size: 1.6rem;
    }

    .inv-info__item {
        grid-template-columns: 100px 1fr;
        gap: 1.5rem;
    }
}

/* ===== DESKTOP ===== */
@media (min-width: 900px) {
    .inv-container {
        max-width: 720px;
    }

    .inv-hero {
        min-height: 100vh;
    }

    .inv-hero__content {
        max-width: 720px;
        margin: 0 auto;
        padding: 4rem 2rem 7rem;
    }

    .inv-hero__title {
        font-size: 5rem;
    }

    .inv-section {
        padding: 8rem 0;
    }

    .inv-heading {
        font-size: 2.4rem;
    }

    .inv-quote {
        font-size: 1.8rem;
    }
}

/* Prevent horizontal scroll */
html, body {
    overflow-x: hidden;
    max-width: 100%;
}