:root {
    --apple-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    --text-main: #1d1d1f;
    --text-secondary: #86868b;
    --text-muted: #a0a0a7;
    --card-bg: rgba(255, 255, 255, 0.6);
    --accent: #ff4d4f;
    --accent-soft: rgba(255, 77, 79, 0.08);
    --line-soft: rgba(29, 29, 31, 0.08);
}

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

body {
    font-family: var(--apple-font);
    background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 50%, #f3e7e9 100%);
    min-height: 100vh;
    color: var(--text-main);
    overflow-x: hidden;
}

.glass {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.03);
}

#home-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 24px;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.heart {
    color: var(--accent);
    display: inline-block;
    animation: heartbeat 2s infinite;
    margin: 0 10px;
}

.timer-card {
    padding: 40px;
    margin-top: 30px;
    text-align: center;
}

.start-date {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.timer-container {
    display: flex;
    gap: 30px;
    justify-content: center;
}

.time-block {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.number {
    font-size: 3.5rem;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
}

.label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

.total-years {
    margin-top: 25px;
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 2px;
}

.enter-btn {
    margin-top: 50px;
    padding: 15px 40px;
    font-size: 1.1rem;
    color: #fff;
    background: #1d1d1f;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    transition: transform 0.3s, background 0.3s;
}

.enter-btn:hover {
    background: #434344;
    transform: translateY(-2px);
}

#main-content {
    display: none;
    opacity: 0;
    max-width: 980px;
    margin: 0 auto;
    padding: 92px 20px 48px;
    transition: opacity 0.8s ease;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    padding: 0 16px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 100;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-main,
.nav-auth,
.toolbar-actions,
.card-actions,
.sort-actions,
.auth-prompt-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

nav button {
    background: none;
    border: none;
    font-size: 1rem;
    color: var(--text-secondary);
    cursor: pointer;
    font-family: inherit;
    transition: color 0.3s;
    white-space: nowrap;
}

nav button.active {
    color: var(--text-main);
    font-weight: 600;
}

.nav-pill,
.ghost-link {
    border: none;
    border-radius: 999px;
    padding: 10px 16px;
    background: #1d1d1f;
    color: #fff;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.2s ease, background 0.2s ease;
    white-space: nowrap;
    font: inherit;
}

.nav-pill:hover,
.ghost-link:hover {
    transform: translateY(-1px);
}

.ghost-link,
.nav-pill.ghost-btn {
    background: rgba(255, 255, 255, 0.72);
    color: var(--text-main);
    border: 1px solid var(--line-soft);
}

.auth-chip {
    color: var(--text-secondary);
    font-size: 0.92rem;
    white-space: nowrap;
}

.module {
    display: none;
    animation: fadeIn 0.5s ease;
}

.module.active {
    display: block;
}

.module-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 18px;
    margin-bottom: 30px;
}

.module-add-btn {
    flex: 0 0 auto;
    margin-top: 6px;
}

.editor-toolbar {
    display: none;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
    padding: 16px 18px;
    margin-bottom: 28px;
}

.editor-toolbar.active {
    display: flex;
}

.toolbar-copy {
    display: grid;
    gap: 4px;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.section-subtitle {
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 640px;
}

.timeline-list {
    position: relative;
    padding-left: 30px;
}

.timeline-list::before {
    content: "";
    position: absolute;
    top: 6px;
    bottom: 6px;
    left: 9px;
    width: 2px;
    background: linear-gradient(180deg, rgba(255, 77, 79, 0.35), rgba(255, 77, 79, 0.08));
}

.timeline-card {
    position: relative;
    padding: 22px 22px 22px 26px;
    margin-bottom: 18px;
}

.timeline-card::before {
    content: "";
    position: absolute;
    top: 26px;
    left: -29px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 6px rgba(255, 77, 79, 0.12);
}

.date {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 8px;
    display: inline-block;
}

.timeline-card h3,
.guide-card h3,
.travel-card h3,
.message-card h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
    font-weight: 600;
}

.timeline-card p,
.guide-card p,
.travel-card p,
.message-card p,
.panel-text,
.empty-card p {
    color: var(--text-secondary);
    line-height: 1.75;
    font-size: 0.96rem;
}

.travel-list,
.guide-list,
.message-list {
    display: grid;
    gap: 20px;
}

.travel-card,
.guide-card,
.message-card,
.guestbook-panel,
.empty-card {
    padding: 22px;
}

.guide-card,
.travel-card,
.timeline-card,
.message-card {
    position: relative;
}

.card-actions {
    position: absolute;
    top: 18px;
    right: 18px;
    z-index: 2;
}

.sort-actions {
    margin-top: 16px;
}

.mini-btn {
    border: none;
    border-radius: 12px;
    padding: 9px 12px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--text-main);
    cursor: pointer;
    border: 1px solid var(--line-soft);
    font: inherit;
}

.mini-btn.danger {
    color: #b42318;
}

.travel-meta,
.message-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 14px;
    margin-top: 18px;
}

.cover-shell {
    display: grid;
    gap: 14px;
    margin-top: 18px;
}

.travel-slideshow {
    display: grid;
    gap: 12px;
}

.travel-slideshow.is-album {
    gap: 14px;
}

.slideshow-stage {
    position: relative;
    aspect-ratio: 16 / 10;
    border-radius: 24px;
    overflow: hidden;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.7), rgba(243, 231, 233, 0.78));
    border: 1px solid rgba(255, 255, 255, 0.65);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6), 0 18px 40px rgba(31, 26, 28, 0.08);
    cursor: pointer;
    touch-action: pan-y;
}

.album-stack {
    position: absolute;
    inset: auto 28px -12px 28px;
    height: 48px;
    border-radius: 18px;
    pointer-events: none;
    background: rgba(255, 255, 255, 0.62);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 12px 24px rgba(31, 26, 28, 0.06);
}

.album-stack.stack-back {
    transform: rotate(-3deg);
    opacity: 0.7;
}

.album-stack.stack-front {
    transform: rotate(2.4deg);
    opacity: 0.9;
}

.travel-slide {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 18px;
    opacity: 0;
    visibility: hidden;
    z-index: 0;
    transform: scale(1.02);
    transition: opacity 420ms ease, transform 560ms ease;
    pointer-events: none;
}

.travel-slide[hidden] {
    display: none !important;
}

.travel-slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 1;
    transform: scale(1);
}

.travel-slide.photo-frame {
    aspect-ratio: auto;
    height: 100%;
    border: none;
    border-radius: 0;
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.34), rgba(244, 231, 233, 0.16));
}

.travel-slide img {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
    border-radius: 18px;
}

.slideshow-chip {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 2;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(17, 17, 22, 0.42);
    color: rgba(255, 255, 255, 0.95);
    font-size: 0.85rem;
    letter-spacing: 0.02em;
    backdrop-filter: blur(10px);
}

.slideshow-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    width: 42px;
    height: 42px;
    border: none;
    border-radius: 999px;
    background: rgba(17, 17, 22, 0.36);
    color: #fff;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    backdrop-filter: blur(10px);
}

.slideshow-nav.prev {
    left: 16px;
}

.slideshow-nav.next {
    right: 16px;
}

.slideshow-counter {
    position: absolute;
    right: 16px;
    bottom: 16px;
    z-index: 2;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(17, 17, 22, 0.4);
    color: rgba(255, 255, 255, 0.92);
    font-size: 0.9rem;
    letter-spacing: 0.02em;
}

.slideshow-progress {
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 16px;
    height: 4px;
    z-index: 2;
    border-radius: 999px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.28);
}

.slideshow-progress-bar {
    display: block;
    width: 100%;
    height: 100%;
    transform: scaleX(0);
    transform-origin: left center;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.88), rgba(255, 77, 79, 0.92));
}

.slideshow-filmstrip {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(72px, 92px);
    gap: 10px;
    overflow-x: auto;
    padding: 2px 2px 6px;
    scrollbar-width: thin;
}

.slideshow-thumb {
    position: relative;
    height: 72px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.65);
    border-radius: 16px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transform: translateY(0);
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.slideshow-thumb.active {
    transform: translateY(-2px);
    border-color: rgba(255, 77, 79, 0.55);
    box-shadow: 0 10px 24px rgba(255, 77, 79, 0.16);
}

.slideshow-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.slideshow-dots {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.slideshow-dot {
    width: 10px;
    height: 10px;
    border: none;
    border-radius: 999px;
    background: rgba(22, 22, 28, 0.18);
    cursor: pointer;
    transition: transform 180ms ease, background 180ms ease;
}

.slideshow-dot.active {
    width: 28px;
    background: rgba(22, 22, 28, 0.72);
}

@media (prefers-reduced-motion: reduce) {
    .travel-slide {
        transition: none;
    }

    .slideshow-thumb {
        transition: none;
    }

    .slideshow-dot {
        transition: none;
    }
}

.travel-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 12px;
}

.travel-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.6);
    color: var(--text-main);
    font-size: 0.88rem;
}

.travel-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.photo-count {
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.travel-note {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.photo-frame {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.65), rgba(255, 255, 255, 0.28));
    border: 1px solid rgba(255, 255, 255, 0.55);
}

.photo-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.photo-placeholder {
    width: 100%;
    height: 100%;
    display: grid;
    place-items: center;
    color: var(--text-secondary);
    font-size: 0.95rem;
    text-align: center;
    padding: 18px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.4), rgba(243, 231, 233, 0.85));
}

.guestbook-panel {
    margin-bottom: 22px;
}

.auth-prompt {
    display: grid;
    gap: 12px;
}

.guestbook-section {
    display: grid;
    gap: 18px;
    margin-bottom: 26px;
}

.section-mini {
    display: grid;
    gap: 8px;
}

.panel-title {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.guestbook-lockup {
    display: grid;
    gap: 16px;
}

.inline-form,
.form-grid,
.form-actions,
.message-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.guestbook-form {
    margin-top: 22px;
    display: grid;
    gap: 14px;
}

.upload-field {
    display: grid;
    gap: 10px;
    padding: 16px 18px;
    border: 1px dashed rgba(29, 29, 31, 0.14);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.45);
}

.upload-label {
    color: var(--text-secondary);
    font-size: 0.94rem;
}

input,
textarea,
button {
    font: inherit;
}

input,
textarea {
    width: 100%;
    border: 1px solid var(--line-soft);
    background: rgba(255, 255, 255, 0.75);
    border-radius: 16px;
    padding: 14px 16px;
    color: var(--text-main);
    outline: none;
}

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

.inline-form input,
.form-grid input {
    flex: 1 1 220px;
}

.preview-grid {
    margin-top: 0;
}

.preview-grid .photo-frame {
    aspect-ratio: 1.1 / 1;
}

.message-card .photo-grid {
    margin-top: 16px;
}

.inline-form button,
.form-grid button,
.message-actions button,
.ghost-btn {
    border: none;
    border-radius: 16px;
    padding: 12px 18px;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

.inline-form button,
.form-grid button,
.message-actions button {
    background: #1d1d1f;
    color: #fff;
}

.ghost-btn {
    background: rgba(255, 255, 255, 0.65);
    color: var(--text-main);
    border: 1px solid var(--line-soft);
}

.inline-form button:hover,
.form-grid button:hover,
.message-actions button:hover,
.ghost-btn:hover {
    transform: translateY(-1px);
}

.status-text {
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.result-card,
.empty-card {
    margin-top: 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.68);
    border: 1px solid rgba(255, 255, 255, 0.55);
}

.result-card strong {
    display: block;
    margin-bottom: 10px;
}

.result-card a {
    color: inherit;
    word-break: break-all;
}

.message-card {
    position: relative;
    display: grid;
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
}

.message-avatar {
    width: 58px;
    height: 58px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.88), rgba(255, 77, 79, 0.14));
    border: 1px solid rgba(255, 255, 255, 0.72);
}

.message-body {
    min-width: 0;
}

.message-topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
}

.message-author {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.message-author strong {
    font-size: 1.02rem;
}

.message-floor {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.message-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.message-tag {
    font-size: 0.78rem;
    color: var(--accent);
    background: var(--accent-soft);
    padding: 6px 10px;
    border-radius: 999px;
}

.message-card.pinned {
    border-color: rgba(255, 77, 79, 0.18);
    box-shadow: 0 16px 38px rgba(255, 77, 79, 0.09);
}

.message-card.pinned::before {
    content: "置顶帖";
    position: absolute;
    top: 18px;
    left: 18px;
    font-size: 0.78rem;
    color: var(--accent);
    background: var(--accent-soft);
    padding: 6px 10px;
    border-radius: 999px;
}

.message-card.pinned .message-meta {
    padding-left: 58px;
}

.message-card .message-meta {
    margin-bottom: 0;
}

.message-card .message-content {
    margin-top: 4px;
}

.message-card .photo-grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr) 56px;
    align-items: center;
    gap: 12px;
    padding: 24px;
    background: rgba(10, 10, 12, 0.86);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.lightbox-stage {
    display: grid;
    gap: 16px;
    justify-items: center;
}

.lightbox-image {
    max-width: min(92vw, 1180px);
    max-height: 78vh;
    border-radius: 22px;
    object-fit: contain;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

.lightbox-caption {
    color: rgba(255, 255, 255, 0.84);
    text-align: center;
    line-height: 1.6;
    max-width: 760px;
}

.lightbox-close,
.lightbox-nav {
    border: none;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    width: 48px;
    height: 48px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 1.8rem;
    display: grid;
    place-items: center;
}

.lightbox-close {
    position: absolute;
    top: 18px;
    right: 18px;
}

.lightbox-nav[disabled] {
    opacity: 0.35;
    cursor: default;
}

.app-modal {
    position: fixed;
    inset: 0;
    z-index: 1100;
    display: grid;
    place-items: center;
    padding: 22px;
}

.app-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 10, 12, 0.56);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.app-modal-card {
    position: relative;
    width: min(760px, 100%);
    max-height: min(88vh, 920px);
    overflow: auto;
    padding: 22px;
}

.app-modal-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}

.modal-close {
    position: static;
    flex: 0 0 auto;
}

.app-modal-body {
    display: grid;
    gap: 16px;
}

.modal-form {
    display: grid;
    gap: 16px;
}

.modal-two-col {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.modal-existing-files {
    display: grid;
    gap: 12px;
}

.existing-file {
    display: grid;
    gap: 10px;
}

.existing-file label {
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.empty-inline {
    color: var(--text-secondary);
    font-size: 0.94rem;
}

.hidden {
    display: none !important;
}

@keyframes heartbeat {
    0%, 30%, 60%, 100% {
        transform: scale(1);
    }

    15%, 45% {
        transform: scale(1.15);
    }
}

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

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

@media (max-width: 720px) {
    #main-content {
        padding-top: 118px;
    }

    nav {
        justify-content: flex-start;
        overflow-x: auto;
    }

    .nav-main,
    .nav-auth {
        flex: 0 0 auto;
    }

    .editor-toolbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .module-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .module-add-btn {
        margin-top: 0;
    }

    .toolbar-actions {
        flex-wrap: wrap;
    }

    .modal-two-col {
        grid-template-columns: 1fr;
    }

    .timer-card {
        width: 100%;
        max-width: 560px;
    }

    .timer-container {
        gap: 18px;
    }
}

@media (max-width: 600px) {
    h1 {
        font-size: 2rem;
    }

    .number {
        font-size: 2.5rem;
    }

    .timer-card {
        padding: 28px 20px;
    }

    .timeline-list {
        padding-left: 24px;
    }

    .timeline-card::before {
        left: -23px;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .message-card {
        grid-template-columns: 1fr;
    }

    .card-actions {
        position: static;
        margin-top: 14px;
        justify-content: flex-end;
        flex-wrap: wrap;
    }

    .message-avatar {
        width: 48px;
        height: 48px;
        border-radius: 14px;
        font-size: 0.98rem;
    }

    .lightbox {
        grid-template-columns: 40px minmax(0, 1fr) 40px;
        padding: 18px 10px;
    }

    .app-modal {
        padding: 12px;
    }

    .lightbox-close,
    .lightbox-nav {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
    }

    .slideshow-nav {
        width: 38px;
        height: 38px;
    }

    .slideshow-chip {
        top: 12px;
        left: 12px;
        font-size: 0.8rem;
    }

    .slideshow-progress {
        left: 12px;
        right: 12px;
        bottom: 12px;
    }

    .slideshow-filmstrip {
        grid-auto-columns: 72px;
    }

    .slideshow-thumb {
        height: 60px;
    }
}