:root {
    --primary-bg: #fdfbf7;
    --text-main: #4a4238;
    --text-muted: #8b8884;
    --accent-color: #d4a373;
    --border-color: #e8e3dc;
    --white: #ffffff;
    --font-serif: 'Nanum Myeongjo', serif;
    --font-sans: 'Noto Sans KR', sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: #efefef;
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* App View Container */
.app-container {
    max-width: 480px;
    margin: 0 auto;
    background-color: var(--primary-bg);
    min-height: 100vh;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
    display: none;
}

/* BGM Toggle Button */
.bgm-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    z-index: 999;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
    transition: background 0.3s, transform 0.2s;
}

.bgm-btn:hover {
    background: var(--white);
    transform: scale(1.05);
}

.bgm-btn .bgm-icon {
    font-size: 1.3rem;
    line-height: 1;
}

/* Intro Screen Animation */
#intro-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--primary-bg);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    transition: opacity 1.5s ease-in-out, visibility 1.5s;
}

#intro-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.intro-content {
    text-align: center;
    animation: pulseScale 3s infinite alternate;
}

.intro-names {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    color: var(--accent-color);
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.intro-date {
    font-size: 1.1rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

@keyframes pulseScale {
    0% {
        transform: scale(1);
    }

    100% {
        transform: scale(1.05);
    }
}

@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

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

.slide-up {
    animation: slideUpFade 1.2s ease-out forwards;
}

/* Hero Section */
.hero {
    text-align: center;
    padding-bottom: 40px;
}

.hero-image-wrapper {
    width: 100%;
    height: 70vh;
    overflow: hidden;
    position: relative;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    animation: slowZoom 15s ease-in-out infinite alternate;
}

@keyframes slowZoom {
    0% {
        transform: scale(1);
    }

    100% {
        transform: scale(1.1);
    }
}

.hero-text {
    padding: 40px 20px 0;
}

.wedding-date {
    font-size: 0.95rem;
    color: var(--accent-color);
    letter-spacing: 3px;
    margin-bottom: 20px;
    font-weight: 500;
}

.couple-names {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.couple-names span {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin: 0 10px;
}

.wedding-location {
    font-size: 1.05rem;
    color: var(--text-muted);
}

/* Base Sections */
section {
    padding: 70px 25px;
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    text-align: center;
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--accent-color);
    margin-bottom: 40px;
    letter-spacing: 3px;
}

/* Greeting Section */
.greeting {
    text-align: center;
}

.greeting-text {
    line-height: 2.4;
    font-size: 1.05rem;
    color: var(--text-main);
    margin-bottom: 50px;
}

.parents-info {
    background: var(--white);
    padding: 35px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
}

.parent-row {
    font-size: 1.15rem;
    margin-bottom: 20px;
}

.parent-row:last-child {
    margin-bottom: 0;
}

.parent-name {
    font-weight: 500;
}

.relation {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin: 0 8px;
}

.person-name {
    font-weight: 700;
    font-size: 1.25rem;
}

/* Gallery Section */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.gallery-item {
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    aspect-ratio: 1 / 1;
    cursor: pointer;
    display: none;
}

.gallery-item.show {
    display: block;
    animation: fadeInScale 0.5s ease forwards;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.gallery-item:hover img {
    transform: scale(1.08);
}

.gallery-more {
    text-align: center;
    margin-top: 25px;
}

.btn-more {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.95rem;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all 0.3s ease;
}

.btn-more:hover {
    background: var(--primary-bg);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.btn-more.hidden {
    display: none;
}

/* Contact Section */
.contact-card {
    background: var(--white);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
}

.contact-card h4 {
    color: var(--accent-color);
    margin-bottom: 20px;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
}

.contact-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    font-size: 1.1rem;
    font-weight: 500;
}

.contact-item:not(:last-child) {
    border-bottom: 1px dashed var(--border-color);
}

.contact-actions .btn-icon {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-bg);
    text-decoration: none;
    margin-left: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s, background-color 0.2s;
    font-size: 1.1rem;
}

.contact-actions .btn-icon:hover {
    transform: scale(1.1);
    background-color: var(--white);
}

/* Account Section */
.account-desc {
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 35px;
    line-height: 1.8;
}

.accordion-container {
    margin-bottom: 15px;
}

.accordion-btn {
    width: 100%;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 18px 25px;
    border: none;
    border-radius: 10px;
    font-size: 1.05rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(212, 163, 115, 0.2);
}

.accordion-btn:hover {
    background-color: #c49666;
}

.accordion-btn .icon {
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.accordion-btn.active .icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out, padding 0.4s ease-out;
    background-color: var(--white);
    border-radius: 0 0 10px 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
}

.accordion-content.show {
    max-height: 600px;
    padding: 25px;
}

.account-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.account-info:not(:last-child) {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px dashed var(--border-color);
}

.account-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.account-details .bank {
    font-weight: 700;
    color: var(--accent-color);
    font-size: 1.05rem;
}

.account-details .account-num {
    font-family: monospace;
    font-size: 1.2rem;
}

.account-details .name {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.btn-copy {
    background-color: var(--primary-bg);
    border: 1px solid var(--border-color);
    padding: 10px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.2s;
    font-weight: 500;
    color: var(--text-main);
}

.btn-copy:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--white);
}

/* Location & Map Section */
.location-info {
    text-align: center;
    margin-bottom: 25px;
}

.venue-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 5px;
}

.venue-address {
    font-size: 0.95rem;
    color: var(--text-main);
}

.map-container {
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.nav-buttons {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px 0;
    background: var(--white);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-main);
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border-color);
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.nav-icon {
    width: 24px;
    height: 24px;
    margin-bottom: 5px;
    border-radius: 5px;
}

.nav-icon.text {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    color: #fff;
}

.nav-btn.tmap .nav-icon.text {
    background: #000;
    border-radius: 50%;
}

.nav-btn.naver .nav-icon.text {
    background: #03c75a;
}

/* Lightbox Modal */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.show {
    opacity: 1;
    visibility: visible;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    color: #fff;
    font-size: 2.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 10001;
}

.lightbox-content {
    position: relative;
    width: 100%;
    max-width: 480px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content img {
    width: 100%;
    max-height: 80vh;
    object-fit: contain;
    user-select: none;
    pointer-events: none;
}

.lightbox-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10001;
    transition: background 0.2s;
}

.lightbox-btn:hover {
    background: rgba(255, 255, 255, 0.4);
}

.lightbox-btn.prev {
    left: 10px;
}

.lightbox-btn.next {
    right: 10px;
}

.lightbox-count {
    position: absolute;
    bottom: 30px;
    color: #fff;
    font-size: 1rem;
    letter-spacing: 2px;
}

/* Guestbook Section */
.guestbook-section {
    background: var(--primary-bg);
}

.guestbook-form {
    background: var(--white);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    margin-bottom: 30px;
}

.guestbook-form .form-row {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.guestbook-form input,
.guestbook-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: var(--font-sans);
    outline: none;
    transition: border-color 0.3s;
}

.guestbook-form input:focus,
.guestbook-form textarea:focus {
    border-color: var(--accent-color);
}

.guestbook-form textarea {
    resize: none;
    margin-bottom: 15px;
}

.form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.char-count {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.btn-submit {
    background-color: var(--accent-color);
    color: var(--white);
    border: none;
    padding: 10px 25px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-submit:hover {
    background-color: #c49666;
}

.gb-item {
    background: var(--white);
    padding: 18px;
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
    border: 1px solid var(--border-color);
    position: relative;
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.gb-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    padding-right: 25px;
}

.gb-name {
    font-weight: 700;
    color: var(--text-main);
    font-size: 1.05rem;
}

.gb-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.gb-text {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-main);
    word-break: break-all;
}

.btn-delete-gb {
    position: absolute;
    top: 15px;
    right: 15px;
    background: transparent;
    border: none;
    font-size: 1.4rem;
    color: #ccc;
    cursor: pointer;
    transition: color 0.2s;
    line-height: 1;
}

.btn-delete-gb:hover {
    color: #ff6b6b;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

.page-btn {
    width: 35px;
    height: 35px;
    border: 1px solid var(--border-color);
    background: var(--white);
    color: var(--text-muted);
    border-radius: 5px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.page-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--white);
}

.page-btn:hover:not(.active) {
    background: #fdfdfd;
    border-color: #dcdcdc;
}

/* Footer */
.footer {
    text-align: center;
    padding: 50px 20px;
    background-color: var(--white);
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* Toast */
.toast {
    position: fixed;
    bottom: -60px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 12px 25px;
    border-radius: 25px;
    font-size: 0.95rem;
    transition: bottom 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s;
    opacity: 0;
    z-index: 10000;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.toast.show {
    bottom: 40px;
    opacity: 1;
}