:root {
    --bg: #0f1625;
    --ink: #172138;
    --ink-soft: rgba(23, 33, 56, 0.72);
    --surface: rgba(255, 255, 255, 0.72);
    --surface-strong: rgba(255, 255, 255, 0.88);
    --surface-border: rgba(255, 255, 255, 0.4);
    --accent: #f4679f;
    --accent-2: #3fb5ff;
    --success: #1ea76f;
    --danger: #d54267;
    --shadow: 0 26px 72px rgba(7, 18, 47, 0.18);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 18px;
    --radius-sm: 14px;
    --theme-tint-from: #f8bfd6;
    --theme-tint-to: #8ed8ff;
    --theme-overlay: 0.42;
    --theme-blur: 18px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    min-height: 100%;
    font-family: "Trebuchet MS", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background: linear-gradient(140deg, color-mix(in srgb, var(--theme-tint-from) 75%, white 25%), color-mix(in srgb, var(--theme-tint-to) 75%, white 25%));
}

a {
    color: inherit;
    text-decoration: none;
}

button, input, select, textarea {
    font: inherit;
}

.page-shell {
    position: relative;
    z-index: 2;
    min-height: 100vh;
}

.scene {
    position: fixed;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.scene__image,
.scene__mesh,
.scene__orb {
    position: absolute;
    inset: 0;
}

.scene__image {
    background-size: cover;
    background-position: center;
    filter: blur(calc(var(--theme-blur) * 0.6)) saturate(1.08);
    transform: scale(1.06);
}

.scene__mesh {
    background:
        radial-gradient(circle at 15% 20%, color-mix(in srgb, var(--theme-tint-from) 70%, transparent 30%), transparent 32%),
        radial-gradient(circle at 85% 18%, color-mix(in srgb, var(--theme-tint-to) 70%, transparent 30%), transparent 28%),
        linear-gradient(145deg, rgba(255, 255, 255, var(--theme-overlay)), rgba(255, 255, 255, 0.22));
    backdrop-filter: blur(var(--theme-blur));
}

.scene__orb {
    width: 34vw;
    height: 34vw;
    border-radius: 50%;
    filter: blur(28px);
    opacity: 0.52;
    animation: float 14s ease-in-out infinite;
}

.scene__orb--one {
    top: -10vw;
    left: -6vw;
    background: color-mix(in srgb, var(--theme-tint-from) 65%, white 35%);
}

.scene__orb--two {
    right: -10vw;
    bottom: -12vw;
    background: color-mix(in srgb, var(--theme-tint-to) 68%, white 32%);
    animation-delay: -6s;
}

@keyframes float {
    0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
    50% { transform: translate3d(0, 22px, 0) scale(1.06); }
}

.workspace,
.auth-layout,
.share-layout {
    position: relative;
    z-index: 1;
    padding: 28px;
}

.workspace {
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 24px;
    min-height: 100vh;
}

.sidebar,
.panel,
.auth-card,
.hero-card,
.share-card {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    box-shadow: var(--shadow);
    backdrop-filter: blur(var(--theme-blur));
}

.sidebar,
.share-card,
.auth-card,
.hero-card {
    border-radius: var(--radius-xl);
}

.panel,
.item-card,
.stat-card,
.info-card {
    border-radius: var(--radius-lg);
}

.sidebar {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.sidebar__brand h1,
.hero-title,
.auth-header h2 {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    letter-spacing: 0.02em;
}

.brand-pill,
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.65);
    color: var(--ink-soft);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.sidebar__nav {
    display: grid;
    gap: 8px;
}

.sidebar__nav a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    color: var(--ink-soft);
}

.sidebar__nav a.is-active,
.sidebar__nav a:hover {
    background: rgba(255, 255, 255, 0.72);
    color: var(--ink);
}

.sidebar__panel,
.panel,
.item-card,
.stat-card,
.info-card,
.auth-card,
.hero-card,
.share-card {
    padding: 20px;
}

.quota-meter {
    display: grid;
    gap: 8px;
}

.quota-meter__bar {
    height: 10px;
    border-radius: 999px;
    background: rgba(23, 33, 56, 0.08);
    overflow: hidden;
}

.quota-meter__bar span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.mini-link {
    display: block;
    padding: 8px 0;
    color: var(--ink-soft);
}

.main {
    display: grid;
    gap: 22px;
    align-content: start;
}

.hero {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: end;
}

.hero h2 {
    margin: 10px 0 0;
    max-width: 720px;
    font-size: clamp(1.8rem, 2.2vw, 2.8rem);
    line-height: 1.08;
}

.hero__search {
    display: grid;
    grid-template-columns: minmax(220px, 1fr) 170px auto;
    gap: 12px;
    min-width: min(100%, 560px);
}

.stats-grid,
.toolbar-grid,
.grid-cards,
.info-stack {
    display: grid;
    gap: 16px;
}

.stats-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.toolbar-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cards {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.stat-card span,
.item-card p,
.flash,
.muted,
.share-card p,
.sidebar p,
.list-row p,
.field span,
.checkbox {
    color: var(--ink-soft);
}

.stat-card strong {
    display: block;
    margin-top: 12px;
    font-size: 2rem;
}

.flash {
    padding: 14px 16px;
    border-radius: var(--radius-md);
}

.flash--success { background: rgba(30, 167, 111, 0.12); color: var(--success); }
.flash--error { background: rgba(213, 66, 103, 0.12); color: var(--danger); }

.panel__header,
.item-card__main,
.list-row,
.button-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.panel__header,
.list-row {
    justify-content: space-between;
}

.panel__header h3,
.item-card h3,
.share-card h2,
.info-card h2 {
    margin: 0;
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}

.breadcrumbs a {
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--ink-soft);
}

.item-card {
    display: grid;
    gap: 16px;
    background: var(--surface-strong);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.item-icon {
    width: 46px;
    height: 46px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(244, 103, 159, 0.18), rgba(63, 181, 255, 0.18));
}

.item-icon--folder::before,
.item-icon--file::before,
.item-icon--image::before,
.item-icon--video::before,
.item-icon--audio::before,
.item-icon--pdf::before,
.item-icon--office::before,
.item-icon--archive::before {
    content: "";
    display: block;
    width: 100%;
    height: 100%;
    background-position: center;
    background-repeat: no-repeat;
}

.item-icon--folder::before { background-image: radial-gradient(circle at 36% 32%, rgba(244,103,159,0.36) 0 20%, transparent 22%), linear-gradient(180deg, rgba(23,33,56,0.8), rgba(23,33,56,0.55)); mask: linear-gradient(#000 0 0); }
.item-icon--file::before,
.item-icon--image::before,
.item-icon--video::before,
.item-icon--audio::before,
.item-icon--pdf::before,
.item-icon--office::before,
.item-icon--archive::before { background-image: linear-gradient(180deg, rgba(23,33,56,0.86), rgba(23,33,56,0.58)); mask: linear-gradient(#000 0 0); }

.form-stack,
.compact-form,
.stack-list {
    display: grid;
    gap: 14px;
}

.field {
    display: grid;
    gap: 8px;
}

.field--wide {
    grid-column: span 2;
}

input, select, textarea {
    width: 100%;
    padding: 13px 14px;
    border: 1px solid rgba(23, 33, 56, 0.12);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.84);
    color: var(--ink);
}

.checkbox {
    display: inline-flex;
    gap: 10px;
    align-items: center;
}

.checkbox input {
    width: auto;
}

.button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: 999px;
    border: 0;
    cursor: pointer;
    white-space: nowrap;
}

.button--large { padding: 14px 18px; font-size: 1rem; }
.button--primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: white; }
.button--ghost { background: rgba(255, 255, 255, 0.68); color: var(--ink); }
.button--danger { background: rgba(213, 66, 103, 0.14); color: var(--danger); }

.inline-form {
    display: inline-flex;
}

.action-menu {
    display: grid;
    gap: 14px;
}

.action-menu summary {
    cursor: pointer;
    color: var(--ink-soft);
}

.preview-frame {
    width: 100%;
    min-height: 520px;
    border: 0;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.74);
}

.preview-frame--image {
    display: block;
    width: 100%;
    max-height: 620px;
    object-fit: contain;
}

.list-row {
    flex-wrap: wrap;
    padding: 16px 0;
    border-bottom: 1px solid rgba(23, 33, 56, 0.08);
}

.list-row:last-child {
    border-bottom: 0;
}

.list-row--form {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr)) auto;
}

.empty-panel {
    padding: 28px;
    text-align: center;
    color: var(--ink-soft);
    background: rgba(255, 255, 255, 0.58);
    border-radius: var(--radius-lg);
}

.auth-layout,
.share-layout {
    min-height: 100vh;
    display: grid;
    align-items: center;
    gap: 24px;
}

.auth-layout {
    grid-template-columns: 1.15fr minmax(340px, 520px);
}

.hero-card--auth {
    display: grid;
    gap: 18px;
}

.hero-title {
    font-size: clamp(2.4rem, 4.5vw, 4.6rem);
    line-height: 0.94;
}

.hero-title--compact {
    font-size: clamp(2rem, 3vw, 3rem);
}

.info-stack {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.auth-card,
.share-card {
    max-width: 620px;
    margin: 0 auto;
}

.share-card {
    width: min(100%, 980px);
}

@media (max-width: 1200px) {
    .workspace { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .toolbar-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
    .auth-layout { grid-template-columns: 1fr; }
    .hero { flex-direction: column; align-items: stretch; }
    .hero__search { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr; }
    .info-stack { grid-template-columns: 1fr; }
    .list-row--form { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .workspace,
    .auth-layout,
    .share-layout { padding: 16px; }
    .sidebar,
    .panel,
    .auth-card,
    .hero-card,
    .share-card { padding: 16px; }
}