:root {
  --ink: #17243b;
  --muted: #657086;
  --faint: #9aa3b5;
  --paper: #f4f6fb;
  --surface: #ffffff;
  --line: #dfe5f0;
  --line-strong: #c7d0e2;
  --navy: #123a6f;
  --navy-deep: #071f43;
  --teal: #f5c842;
  --teal-dark: #d89d16;
  --teal-soft: #fff4c7;
  --blue-soft: #e8f0ff;
  --blue: #2467b2;
  --orange: #d28b16;
  --orange-soft: #fff1d4;
  --red: #c14848;
  --red-soft: #fff0ef;
  --shadow-sm: 0 1px 2px rgba(18, 58, 111, 0.05), 0 5px 18px rgba(18, 58, 111, 0.06);
  --shadow-lg: 0 24px 70px rgba(7, 31, 67, 0.2);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
}

* { box-sizing: border-box; }

html { min-width: 320px; background: var(--paper); }

body {
  margin: 0;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button, input, textarea { font: inherit; }
button, label[for] { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
svg { fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.16em;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--navy);
  font-size: 21px;
  font-weight: 760;
  letter-spacing: 0.08em;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: var(--navy-deep);
  border-radius: 11px;
  background: var(--teal);
}

.brand-mark svg { width: 28px; height: 28px; stroke-width: 2; }
.brand-on-dark { color: white; }

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  font-size: 14px;
  font-weight: 680;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.button:hover:not(:disabled) { transform: translateY(-1px); }
.button:active:not(:disabled) { transform: translateY(0); }
.button:focus-visible, .icon-button:focus-visible, .filter-tab:focus-visible, input:focus-visible, textarea:focus-visible, .drop-zone:focus-within { outline: 3px solid rgba(245, 200, 66, 0.38); outline-offset: 2px; }
.button:disabled { cursor: not-allowed; opacity: 0.45; }
.button svg { width: 18px; height: 18px; }
.button-primary { color: var(--navy-deep); background: var(--teal); box-shadow: 0 8px 24px rgba(216, 157, 22, 0.28); }
.button-primary:hover:not(:disabled) { background: #ffd95f; box-shadow: 0 10px 28px rgba(216, 157, 22, 0.34); }
.button-block { width: 100%; }
.button-soft { min-height: 38px; padding: 0 14px; color: var(--blue); background: var(--blue-soft); }
.button-soft:hover { background: #dbe8ff; }
.button-ghost { border-color: var(--line-strong); background: white; }
.button-danger { color: white; background: var(--red); }

.icon-button {
  display: inline-grid;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  padding: 0;
  place-items: center;
  color: var(--muted);
  border: 0;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  transition: color 160ms ease, background 160ms ease;
}

.icon-button:hover { color: var(--ink); background: var(--paper); }
.icon-button svg { width: 20px; height: 20px; }

/* Login */
.login-body { min-height: 100vh; background: var(--navy); }

.login-shell {
  display: grid;
  min-height: 100vh;
  grid-template-columns: minmax(420px, 0.94fr) minmax(520px, 1.06fr);
}

.login-intro {
  position: relative;
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  padding: clamp(36px, 5vw, 72px) clamp(38px, 6vw, 96px);
  color: white;
  background:
    radial-gradient(circle at 18% 76%, rgba(245, 200, 66, 0.24), transparent 24%),
    radial-gradient(circle at 78% 18%, rgba(36, 103, 178, 0.34), transparent 27%),
    linear-gradient(145deg, var(--navy-deep), var(--navy));
}

.login-intro::before,
.login-intro::after {
  position: absolute;
  content: "";
  border: 1px solid rgba(245, 200, 66, 0.18);
  border-radius: 50%;
}

.login-intro::before { width: 520px; height: 520px; right: -270px; top: -180px; }
.login-intro::after { width: 340px; height: 340px; left: -200px; bottom: 30px; }

.login-copy { position: relative; z-index: 1; max-width: 540px; margin: auto 0; }
.login-copy .eyebrow { color: var(--teal); }
.login-copy h1 { margin: 0; font-size: clamp(42px, 4.4vw, 68px); font-weight: 660; line-height: 1.12; letter-spacing: -0.045em; }
.login-lead { max-width: 420px; margin: 24px 0 0; color: rgba(255, 255, 255, 0.74); font-size: 17px; line-height: 1.75; }

.login-panel {
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 48px;
  background: linear-gradient(180deg, #f8faff, #eef3fb);
}

.login-card { width: min(100%, 420px); }
.login-card-heading { margin-bottom: 36px; }
.login-card-heading h2 { margin: 0 0 10px; color: var(--navy); font-size: 31px; line-height: 1.25; letter-spacing: -0.025em; }
.login-card-heading > p:last-child { margin: 0; color: var(--muted); }
.mobile-brand { display: none; }

.field { display: block; margin-bottom: 22px; }
.field-label { display: block; margin-bottom: 8px; color: var(--ink); font-size: 13px; font-weight: 680; }

.input-wrap { position: relative; display: flex; align-items: center; }
.input-wrap > svg { position: absolute; left: 15px; width: 19px; height: 19px; color: var(--faint); pointer-events: none; }
.input-wrap input { width: 100%; height: 52px; padding: 0 48px; color: var(--ink); border: 1px solid var(--line-strong); border-radius: 12px; background: white; outline: 0; transition: border-color 160ms ease, box-shadow 160ms ease; }
.input-wrap input::placeholder { color: #a0aabe; }
.input-wrap input:focus { border-color: var(--teal); box-shadow: 0 0 0 4px rgba(245, 200, 66, 0.16); }
.field.is-invalid .input-wrap input { border-color: var(--red); background: white; box-shadow: none; }
.field.is-invalid .input-wrap input:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(193, 72, 72, 0.12); }
.field-error { display: block; margin-top: 6px; color: var(--red); font-size: 12px; line-height: 1.35; }
.password-toggle { position: absolute; right: 6px; }
.eye-closed { display: none; }
.password-toggle[aria-pressed="true"] .eye-open { display: none; }
.password-toggle[aria-pressed="true"] .eye-closed { display: block; }

.form-error { margin: -4px 0 16px; padding: 0; color: var(--red); border-radius: 0; background: transparent; font-size: 12px; line-height: 1.35; }

/* App */
.app-body { min-height: 100vh; background: var(--paper); }
.page-width { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.app-header { position: sticky; z-index: 20; top: 0; border-bottom: 1px solid rgba(199, 208, 226, 0.85); background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(16px); }
.header-inner { display: flex; height: 72px; align-items: center; justify-content: space-between; }
.header-actions { display: flex; align-items: center; gap: 8px; }
.connection-status { display: flex; align-items: center; gap: 7px; margin-right: 10px; color: var(--blue); font-size: 12px; font-weight: 650; }
.connection-status > span:first-child { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 4px rgba(245, 200, 66, 0.18); }
.account-button { display: flex; min-height: 48px; align-items: center; gap: 10px; padding: 5px 10px 5px 6px; border: 0; border-radius: 12px; background: transparent; cursor: default; }
.account-link { cursor: pointer; transition: background 160ms ease; }
.account-link:hover { background: var(--paper); }
.avatar { display: grid; width: 36px; height: 36px; place-items: center; color: var(--navy-deep); border-radius: 10px; background: var(--teal-soft); font-weight: 760; }
.account-copy { display: grid; text-align: left; line-height: 1.2; }
.account-copy strong { font-size: 13px; }
.account-copy small { margin-top: 4px; color: var(--faint); font-size: 10px; }
.logout-button { margin-left: 2px; }

.app-main { padding-top: 54px; padding-bottom: 48px; }
.welcome-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 36px; margin-bottom: 34px; }
.welcome-row h1 { margin: 0 0 8px; font-size: clamp(30px, 4vw, 43px); font-weight: 650; line-height: 1.15; letter-spacing: -0.035em; }
.welcome-row h1 span { color: var(--blue); }
.welcome-row > div:first-child > p:last-child { margin: 0; color: var(--muted); font-size: 15px; }
.retention-summary { display: flex; flex: 0 0 auto; align-items: center; gap: 20px; padding: 13px 16px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255, 255, 255, 0.62); }
.retention-summary > div { display: flex; align-items: center; gap: 9px; }
.retention-summary > div:not(.storage-summary) { flex: 0 0 auto; }
.retention-summary > div + div { padding-left: 20px; border-left: 1px solid var(--line); }
.retention-summary > div > span:last-child { display: grid; min-width: 0; line-height: 1.2; }
.retention-summary strong { font-size: 12px; }
.retention-summary small { margin-top: 4px; color: var(--faint); font-size: 10px; white-space: nowrap; }
.summary-icon { display: grid; width: 32px; height: 32px; place-items: center; border-radius: 9px; font-size: 13px; font-weight: 750; }
.summary-icon svg { width: 17px; height: 17px; }
.retention-summary > div.storage-summary { display: grid; flex: 1 1 230px; grid-template-columns: 32px minmax(0, 1fr); gap: 7px 9px; }
.storage-copy { display: flex; min-width: 0; align-items: baseline; flex-wrap: wrap; gap: 0 8px; line-height: 1.2; }
.storage-copy strong { white-space: nowrap; }
.storage-copy small { margin-top: 0; }
.storage-icon { color: var(--navy-deep); background: var(--orange-soft); }
.storage-meter { display: block; grid-column: 2; height: 6px; overflow: hidden; border-radius: 999px; background: var(--blue-soft); }
.storage-meter span { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--teal-dark); transition: width 160ms ease; }

.text-icon { color: #397190; background: var(--blue-soft); }
.file-icon { color: var(--navy-deep); background: var(--teal-soft); }
.archive-icon { color: #a15f23; background: var(--orange-soft); }

.composer-grid { display: grid; grid-template-columns: 1.08fr 0.92fr; gap: 18px; }
.composer-card { min-width: 0; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.card-heading { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.section-icon { display: grid; width: 40px; height: 40px; flex: 0 0 auto; place-items: center; border-radius: 11px; font-size: 16px; font-weight: 760; }
.section-icon svg { width: 20px; height: 20px; }
.card-heading h2 { margin: 0 0 3px; font-size: 16px; }
.card-heading p { margin: 0; color: var(--faint); font-size: 11px; }
.text-composer textarea { display: block; width: 100%; height: 166px; resize: vertical; padding: 15px 16px; color: var(--ink); border: 1px solid var(--line-strong); border-radius: 11px; background: #fbfcff; outline: 0; line-height: 1.7; }
.text-composer textarea:focus { border-color: var(--teal); box-shadow: 0 0 0 4px rgba(245, 200, 66, 0.14); }
.text-composer textarea::placeholder { color: #a0aabe; }
.composer-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 14px; }
.character-count { color: var(--faint); font-size: 10px; }
.character-count strong { color: var(--muted); font-weight: 560; }

.drop-zone { display: flex; height: 166px; align-items: center; justify-content: center; gap: 15px; color: var(--muted); border: 1.5px dashed #b8c6df; border-radius: 12px; background: #f8faff; cursor: pointer; }
.drop-zone > span:last-child { display: grid; }
.drop-zone strong { margin-bottom: 4px; color: var(--ink); font-size: 13px; }
.drop-zone small { color: var(--faint); font-size: 11px; }
.upload-illustration { display: grid; width: 46px; height: 46px; place-items: center; color: var(--blue); border-radius: 13px; background: white; box-shadow: var(--shadow-sm); }
.upload-illustration svg { width: 23px; height: 23px; }
.upload-progress { height: 166px; padding: 48px 24px; border: 1px solid var(--line); border-radius: 12px; background: #fbfcff; }
.upload-file-row { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 16px; font-size: 12px; }
.upload-file-row span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.upload-file-row strong { color: var(--blue); }
.progress-track { height: 7px; overflow: hidden; border-radius: 999px; background: var(--line); }
.progress-track span { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--teal); transition: width 180ms ease; }

.admin-grid { display: grid; grid-template-columns: minmax(320px, 0.8fr) minmax(280px, 1fr); gap: 18px; }
.profile-grid { display: grid; grid-template-columns: minmax(280px, 0.55fr) minmax(360px, 0.85fr); gap: 18px; align-items: start; }
.profile-note { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.admin-form .field:last-of-type { margin-bottom: 18px; }
.admin-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.admin-stats span { display: grid; min-height: 74px; place-items: center; border: 1px solid var(--line); border-radius: 12px; background: #fbfcff; }
.admin-stats strong { color: var(--blue); font-size: 27px; line-height: 1; }
.admin-stats small { color: var(--faint); font-size: 11px; }
.admin-users { display: grid; gap: 10px; }
.admin-user-card { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: white; box-shadow: 0 1px 2px rgba(18, 58, 111, 0.035); }
.admin-user-main { display: flex; min-width: 0; gap: 14px; }
.admin-user-title { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 10px; }
.admin-user-title strong { font-size: 15px; }
.admin-user-meta { display: flex; flex-wrap: wrap; gap: 10px 18px; margin: 0; color: var(--muted); }
.admin-user-meta div { display: grid; gap: 2px; }
.admin-user-meta dt { color: var(--faint); font-size: 10px; }
.admin-user-meta dd { margin: 0; font-size: 11px; }
.admin-user-actions { display: flex; flex: 0 0 auto; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 8px; }
.admin-quota-control { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 12px; }
.admin-quota-control input { width: 78px; height: 38px; padding: 0 10px; color: var(--ink); border: 1px solid var(--line-strong); border-radius: 10px; background: #fbfcff; outline: 0; }
.admin-quota-control input:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(245, 200, 66, 0.14); }
.admin-password-reset { display: flex; align-items: center; gap: 8px; }
.admin-password-reset input { width: 170px; height: 38px; padding: 0 11px; color: var(--ink); border: 1px solid var(--line-strong); border-radius: 10px; background: #fbfcff; outline: 0; }
.admin-password-reset input:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(245, 200, 66, 0.14); }
.admin-muted { color: var(--faint); font-size: 12px; }

.content-section { margin-top: 52px; }
.section-heading-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 18px; }
.section-heading-row h2 { margin: 0; font-size: 24px; letter-spacing: -0.02em; }
.filter-tabs { display: flex; gap: 4px; padding: 4px; border: 1px solid var(--line); border-radius: 11px; background: rgba(255, 255, 255, 0.7); }
.filter-tab { min-height: 34px; padding: 0 13px; color: var(--muted); border: 0; border-radius: 8px; background: transparent; cursor: pointer; font-size: 12px; font-weight: 620; }
.filter-tab span { display: inline-grid; min-width: 18px; height: 18px; margin-left: 3px; place-items: center; border-radius: 999px; background: var(--paper); font-size: 9px; }
.filter-tab.active { color: var(--ink); background: white; box-shadow: 0 1px 5px rgba(16, 42, 46, 0.08); }

.item-list { display: grid; gap: 10px; }
.list-loading, .list-error { padding: 38px 20px; color: var(--muted); border: 1px dashed var(--line-strong); border-radius: var(--radius); text-align: center; }
.list-error button { margin-left: 8px; padding: 5px 10px; color: var(--blue); border: 1px solid var(--line-strong); border-radius: 7px; background: white; cursor: pointer; }
.share-item { position: relative; display: flex; min-width: 0; min-height: 116px; align-items: flex-start; justify-content: space-between; gap: 24px; padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: white; box-shadow: 0 1px 2px rgba(18, 58, 111, 0.035); cursor: pointer; transition: border-color 160ms ease, box-shadow 160ms ease; }
.share-item:not(.is-expanded) { align-items: center; }
.share-item:hover { border-color: var(--line-strong); box-shadow: var(--shadow-sm); }
.expiring-item { border-left: 3px solid #e2a14e; }
.item-main { display: flex; min-width: 0; flex: 1; gap: 15px; padding-right: 190px; }
.item-type-badge { display: grid; width: 42px; height: 42px; flex: 0 0 auto; place-items: center; border-radius: 11px; font-size: 12px; font-weight: 780; }
.item-type-badge svg { width: 20px; height: 20px; }
.item-content { min-width: 0; flex: 1; }
.item-topline { display: flex; align-items: center; gap: 9px; margin-bottom: 7px; }
.kind-label { color: var(--faint); font-size: 10px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; }
.status-chip { display: inline-flex; min-height: 21px; align-items: center; gap: 5px; padding: 0 8px; border-radius: 999px; font-size: 9px; font-weight: 680; }
.status-chip span { width: 5px; height: 5px; border-radius: 50%; }
.status-used { color: var(--navy-deep); background: var(--teal-soft); }
.status-used span { background: var(--teal); }
.status-new { color: #7c704d; background: #f7f1dd; }
.status-new span { background: #b49335; }
.text-preview, .file-name { height: 22px; margin: 0 0 10px; overflow: hidden; color: var(--ink); font-size: 14px; line-height: 1.55; white-space: nowrap; text-overflow: ellipsis; overflow-wrap: normal; }
.text-preview { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 1; }
.share-item.is-expanded .text-preview { display: none; }
.file-name { font-weight: 650; }
.item-meta { display: grid; grid-template-columns: repeat(4, max-content); align-items: center; column-gap: 18px; row-gap: 7px; color: var(--faint); font-size: 10px; }
.share-item:not(.is-expanded) .item-meta { height: 17px; overflow: hidden; }
.meta-line { display: contents; }
.meta-line > span { display: inline-flex; align-items: center; gap: 5px; white-space: nowrap; }
.item-meta svg { width: 13px; height: 13px; }
.item-meta .expiry { color: var(--muted); }
.item-meta .expiry-soon { color: var(--orange); font-weight: 650; }
.item-actions { position: absolute; top: 38px; right: 20px; z-index: 1; display: flex; flex: 0 0 auto; align-items: center; gap: 3px; padding-top: 0; transform: none; cursor: default; }
.item-actions .button:hover:not(:disabled), .item-actions .button:active:not(:disabled) { transform: none; }
.action-delete:hover { color: var(--red); background: var(--red-soft); }
.action-history.active { color: var(--blue); background: var(--blue-soft); }

.item-detail { margin: 13px 0 12px; padding: 13px; border: 1px solid var(--line); border-radius: 10px; background: #f8faff; cursor: default; }
.detail-title { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 9px; font-size: 11px; }
.detail-title span { color: var(--faint); font-size: 10px; }
.text-detail-body { max-height: 260px; margin: 0; overflow: auto; color: var(--ink); font-size: 13px; line-height: 1.65; overflow-wrap: anywhere; }
.file-detail { display: flex; align-items: center; gap: 14px; }
.file-thumbnail { display: flex; width: 128px; height: 92px; flex: 0 0 128px; align-items: center; justify-content: center; overflow: hidden; border: 1px solid var(--line-strong); border-radius: 8px; background: white; }
.generic-thumbnail { flex-direction: column; gap: 8px; color: var(--blue); }
.generic-thumbnail svg { width: 31px; height: 31px; }
.generic-thumbnail span { max-width: 92px; overflow: hidden; font-size: 12px; font-weight: 780; text-overflow: ellipsis; white-space: nowrap; }
.image-thumbnail { position: relative; padding: 0; cursor: zoom-in; }
.image-thumbnail:hover { border-color: var(--blue); }
.image-thumbnail img { display: block; width: 100%; height: 100%; object-fit: contain; transition: filter 160ms ease, opacity 160ms ease; }
.image-thumbnail.is-loading { cursor: wait; }
.image-thumbnail.is-loading img { filter: brightness(0.55); opacity: 0.72; }
.thumbnail-spinner { position: absolute; width: 24px; height: 24px; border: 3px solid rgba(255, 255, 255, 0.6); border-top-color: var(--blue); border-radius: 50%; animation: spin 800ms linear infinite; }
.image-thumbnail:not(.is-loading) .thumbnail-spinner { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.file-detail-copy { display: grid; min-width: 0; gap: 5px; }
.file-detail-copy strong { overflow: hidden; color: var(--ink); font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
.file-detail-copy span { color: var(--muted); font-size: 11px; }

.history-panel { margin-top: 15px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 10px; background: #f8faff; }
.history-title { display: flex; justify-content: space-between; margin-bottom: 10px; font-size: 11px; }
.history-title span { color: var(--faint); }
.history-panel ol { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.history-device { display: flex; align-items: center; gap: 9px; }
.history-device i { width: 7px; height: 7px; border: 2px solid white; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 1px var(--line-strong); }
.history-device > span { display: grid; line-height: 1.25; }
.history-device strong { font-size: 10px; font-weight: 650; }
.history-device small { margin-top: 3px; color: var(--faint); font-size: 9px; }
.empty-history { color: var(--faint); font-size: 11px; text-align: center; }

.empty-state { padding: 64px 20px; color: var(--muted); border: 1px dashed var(--line-strong); border-radius: var(--radius); text-align: center; }
.empty-state h3 { margin: 14px 0 5px; color: var(--ink); }
.empty-state p { margin: 0; font-size: 12px; }
.empty-icon { display: inline-grid; width: 48px; height: 48px; place-items: center; color: var(--blue); border-radius: 14px; background: var(--blue-soft); }
.empty-icon svg { width: 24px; height: 24px; }

.app-footer { display: flex; align-items: center; justify-content: flex-start; padding-top: 22px; padding-bottom: 32px; color: var(--faint); border-top: 1px solid var(--line); font-size: 10px; text-align: left; }
.app-footer p { margin: 0; }

.modal-backdrop { position: fixed; z-index: 50; inset: 0; display: grid; padding: 20px; place-items: center; background: rgba(7, 31, 67, 0.58); backdrop-filter: blur(5px); }
.modal { position: relative; width: min(100%, 400px); padding: 32px; border-radius: 18px; background: white; box-shadow: var(--shadow-lg); text-align: center; animation: modal-in 180ms ease-out; }
@keyframes modal-in { from { opacity: 0; transform: translateY(8px) scale(0.98); } }
.modal-close { position: absolute; top: 12px; right: 12px; }
.modal-warning { display: inline-grid; width: 50px; height: 50px; place-items: center; color: var(--red); border-radius: 15px; background: var(--red-soft); }
.modal-warning svg { width: 23px; height: 23px; }
.modal h2 { margin: 18px 0 8px; font-size: 20px; }
.modal p { margin: 0; color: var(--muted); font-size: 13px; }
.modal-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 26px; }
.image-preview-backdrop { position: fixed; z-index: 70; inset: 0; display: grid; padding: 24px; place-items: center; background: rgba(7, 31, 67, 0.68); backdrop-filter: blur(5px); }
.image-preview-dialog { position: relative; display: grid; width: min(960px, calc(100vw - 48px)); max-height: calc(100svh - 48px); overflow: hidden; padding: 44px 18px 18px; border-radius: 12px; background: white; box-shadow: var(--shadow-lg); }
.image-preview-close { position: absolute; top: 10px; right: 10px; }
.image-preview-dialog img { display: block; max-width: 100%; max-height: calc(100svh - 128px); width: auto; height: auto; object-fit: contain; justify-self: center; border-radius: 8px; background: var(--paper); }

.toast-region { position: fixed; z-index: 60; right: 24px; bottom: 24px; pointer-events: none; }
.toast { display: flex; min-width: 240px; align-items: center; gap: 10px; padding: 13px 16px; color: white; border-radius: 12px; background: var(--navy); box-shadow: var(--shadow-lg); animation: toast-in 220ms ease-out; font-size: 12px; }
@keyframes toast-in { from { opacity: 0; transform: translateY(10px); } }
.toast-icon { display: grid; width: 23px; height: 23px; place-items: center; color: var(--navy-deep); border-radius: 50%; background: var(--teal); }
.toast-icon svg { width: 14px; height: 14px; stroke-width: 2.4; }

@media (max-width: 960px) {
  .login-shell { grid-template-columns: minmax(340px, 0.78fr) minmax(440px, 1fr); }
  .login-intro { padding: 44px; }
  .login-copy h1 { font-size: 46px; }
  .composer-grid { grid-template-columns: 1fr; }
  .admin-grid { grid-template-columns: 1fr; }
  .profile-grid { grid-template-columns: 1fr; }
  .text-composer textarea { height: 166px; }
}

@media (max-width: 760px) {
  html, .login-body { background: #eef3fb; }
  .login-shell { display: block; min-height: 100svh; background: #eef3fb; }
  .login-intro { display: none; }
  .login-panel { min-height: 100svh; padding: 28px 22px; background: #eef3fb; }
  .mobile-brand { display: inline-block; margin-bottom: 44px; color: var(--blue); font-size: 22px; font-weight: 780; letter-spacing: 0.1em; }
  .login-card-heading { margin-bottom: 30px; }
  .login-card-heading h2 { font-size: 28px; }
  .login-card-heading > p:last-child { color: #536077; }

  .page-width { width: min(100% - 28px, 1180px); }
  .header-inner { height: 64px; }
  .brand { font-size: 18px; }
  .brand-mark { width: 32px; height: 32px; border-radius: 9px; }
  .brand-mark svg { width: 25px; height: 25px; }
  .status-full, .account-copy { display: none; }
  .connection-status { margin-right: 2px; }
  .account-button { min-height: 42px; padding: 4px; }
  .avatar { width: 34px; height: 34px; }
  .logout-button { width: 38px; height: 38px; }

  .app-main { padding-top: 32px; }
  .welcome-row { display: block; margin-bottom: 25px; }
  .welcome-row h1 { font-size: 31px; }
  .retention-summary { flex-wrap: wrap; margin-top: 22px; justify-content: space-between; }
  .retention-summary > div { flex: 1; }
  .retention-summary > div:not(.storage-summary) { flex: 1 1 0; }
  .retention-summary > div + div { padding-left: 14px; }
  .retention-summary > div.storage-summary { flex: 1 0 100%; padding-top: 12px; padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
  .composer-card { padding: 18px; }
  .text-composer textarea, .drop-zone { height: 140px; }
  .upload-progress { height: 140px; padding: 39px 15px; }
  .content-section { margin-top: 38px; }
  .section-heading-row { display: block; }
  .filter-tabs { margin-top: 16px; }
  .filter-tab { flex: 1; }

  .share-item { display: block; padding: 16px; }
  .admin-user-card { display: block; padding: 16px; }
  .admin-user-actions { display: grid; grid-template-columns: 1fr auto; justify-content: stretch; margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); }
  .admin-quota-control, .admin-password-reset { grid-column: 1 / -1; display: grid; width: 100%; align-items: center; gap: 8px; justify-content: stretch; }
  .admin-quota-control { grid-template-columns: minmax(0, 1fr) auto auto; }
  .admin-password-reset { grid-template-columns: minmax(0, 1fr) auto; }
  .admin-quota-control input, .admin-password-reset input { width: 100%; min-width: 0; }
  .admin-save-quota, .admin-reset-password { white-space: nowrap; }
  .admin-user-actions .action-delete { grid-column: 2; justify-self: end; }
  .item-main { gap: 11px; padding-right: 0; }
  .item-type-badge { width: 36px; height: 36px; border-radius: 9px; }
  .item-actions { position: static; justify-content: flex-end; margin-top: 13px; padding-top: 12px; border-top: 1px solid var(--line); transform: none; }
  .item-actions .button-soft { margin-right: auto; }
  .share-item .item-content .item-meta { display: grid; grid-template-columns: minmax(0, 1fr); height: auto; overflow: visible; row-gap: 6px; line-height: 1.35; }
  .meta-line { display: flex; min-width: 0; align-items: center; gap: 12px; }
  .meta-line > span { min-width: 0; max-width: 100%; overflow: hidden; line-height: 1.35; text-overflow: ellipsis; white-space: nowrap; }
  .item-detail { margin-left: -47px; }
  .share-item.is-expanded .text-detail { margin-top: 40px; }
  .file-detail { align-items: flex-start; }
  .file-thumbnail { width: 112px; height: 86px; flex-basis: 112px; }
  .history-panel { margin-left: -47px; }
  .app-footer { justify-content: flex-start; text-align: left; }
  .toast-region { right: 14px; bottom: 14px; left: 14px; }
  .toast { min-width: 0; }
}

@media (max-width: 420px) {
  .login-panel { justify-content: flex-start; }
  .login-card { margin-top: 20px; }
  .retention-summary { gap: 9px; padding: 11px; }
  .summary-icon { width: 29px; height: 29px; }
  .composer-footer .button { padding: 0 14px; }
  .item-topline { align-items: flex-start; flex-direction: column; gap: 5px; }
  .modal { padding: 28px 22px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}