@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Manrope:wght@500;700;800&display=swap');

:root {
  --color-primary: #545f72;
  --color-primary-dim: #485366;
  --color-primary-soft: #d8e3fa;
  --color-accent: #809db7;
  --color-surface: #f5faff;
  --color-surface-low: #edf5fc;
  --color-surface-mid: #e4eff8;
  --color-surface-high: #d8e7f3;
  --color-card: rgba(255, 255, 255, 0.78);
  --color-card-strong: rgba(255, 255, 255, 0.92);
  --color-text: #23353f;
  --color-text-soft: #50616c;
  --color-text-faint: #7d8f9b;
  --color-border: rgba(80, 97, 108, 0.14);
  --color-border-strong: rgba(80, 97, 108, 0.26);
  --color-success: #357a58;
  --color-warning: #9b6d2d;
  --color-danger: #b64c4c;
  --color-info: #356e9f;
  --shadow-soft: 0 24px 60px rgba(35, 53, 63, 0.09);
  --shadow-card: 0 16px 40px rgba(35, 53, 63, 0.08);
  --shadow-line: inset 0 1px 0 rgba(255, 255, 255, 0.55);
  --blur-nav: blur(18px);
  --blur-card: blur(12px);
  --radius-sm: 0.625rem;
  --radius-md: 1rem;
  --radius-lg: 1.4rem;
  --radius-xl: 1.8rem;
  --font-headline: 'Manrope', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;
  --header-height: 72px;
  --sidebar-width: 330px;
  --trans: 180ms ease;
  --trans-slow: 320ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, rgba(216, 227, 250, 0.9), transparent 32%),
    radial-gradient(circle at top right, rgba(224, 240, 252, 0.78), transparent 28%),
    linear-gradient(180deg, #f7fbff 0%, #eef5fb 48%, #e8f1f7 100%);
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0)),
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.44) 0, transparent 22%),
    radial-gradient(circle at 80% 0%, rgba(216, 227, 250, 0.38) 0, transparent 26%);
  z-index: -1;
}

::selection {
  background: var(--color-primary-soft);
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-headline);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

p {
  line-height: 1.7;
}

code,
.mono {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: rgba(216, 227, 250, 0.5);
  border: 1px solid rgba(84, 95, 114, 0.12);
  border-radius: 999px;
  padding: 0.15rem 0.45rem;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  padding: 1rem 1.5rem;
  background: rgba(255, 255, 255, 0.56);
  border-bottom: 1px solid rgba(84, 95, 114, 0.08);
  backdrop-filter: var(--blur-nav);
  -webkit-backdrop-filter: var(--blur-nav);
}

.header-logo {
  font-family: var(--font-headline);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  white-space: nowrap;
}

.header-logo span {
  color: var(--color-text-soft);
  font-weight: 600;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
}

.nav-link {
  position: relative;
  padding: 0.7rem 0.95rem;
  border-radius: 999px;
  color: var(--color-text-soft);
  font-size: 0.88rem;
  font-weight: 500;
  transition: background var(--trans), color var(--trans), transform var(--trans);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow-line);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-left: auto;
}

.two-col,
.chat-shell,
.admin-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: calc(100vh - var(--header-height));
}

.sidebar,
.admin-sidebar {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.55));
  border-right: 1px solid var(--color-border);
  backdrop-filter: var(--blur-card);
  -webkit-backdrop-filter: var(--blur-card);
  overflow-y: auto;
}

.sidebar-section {
  padding: 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-label {
  margin-bottom: 0.85rem;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-text-faint);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.card,
.modal,
.inbox-card,
.inbox-detail,
.admin-msg,
.dir-key-card,
.key-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card), var(--shadow-line);
  backdrop-filter: var(--blur-card);
  -webkit-backdrop-filter: var(--blur-card);
}

.card {
  padding: 1.35rem;
}

.card + .card {
  margin-top: var(--sp-4);
}

.card-title {
  margin-bottom: 1rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.8rem 1.15rem;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--trans), box-shadow var(--trans), background var(--trans), border-color var(--trans);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  transform: none;
}

.btn-primary {
  color: #f6f7ff;
  background: linear-gradient(180deg, var(--color-primary), var(--color-primary-dim));
  box-shadow: 0 12px 28px rgba(72, 83, 102, 0.22);
}

.btn-ghost {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(84, 95, 114, 0.12);
}

.btn-danger {
  color: #fff;
  background: linear-gradient(180deg, #ca6464, var(--color-danger));
}

.btn-sm {
  padding: 0.55rem 0.9rem;
  font-size: 0.82rem;
}

.w-full {
  width: 100%;
}

.field {
  display: grid;
  gap: 0.55rem;
  margin-bottom: 1rem;
}

.field-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-soft);
}

.input,
.textarea,
.select {
  width: 100%;
  border: 1px solid rgba(84, 95, 114, 0.12);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  font: inherit;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.82);
  outline: none;
  transition: border-color var(--trans), box-shadow var(--trans), background var(--trans);
}

.input:focus,
.textarea:focus,
.select:focus {
  border-color: rgba(84, 95, 114, 0.3);
  box-shadow: 0 0 0 4px rgba(216, 227, 250, 0.55);
  background: var(--color-card-strong);
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border-radius: 999px;
  padding: 0.3rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 700;
}

.badge-grey {
  background: rgba(80, 97, 108, 0.08);
  color: var(--color-text-soft);
}

.badge-amber {
  background: rgba(155, 109, 45, 0.12);
  color: var(--color-warning);
}

.badge-green {
  background: rgba(53, 122, 88, 0.12);
  color: var(--color-success);
}

.badge-red {
  background: rgba(182, 76, 76, 0.12);
  color: var(--color-danger);
}

.alert {
  border-radius: var(--radius-md);
  padding: 0.95rem 1rem;
  border: 1px solid transparent;
  font-size: 0.92rem;
}

.alert-success {
  color: var(--color-success);
  background: rgba(53, 122, 88, 0.1);
  border-color: rgba(53, 122, 88, 0.18);
}

.alert-warning {
  color: var(--color-warning);
  background: rgba(155, 109, 45, 0.1);
  border-color: rgba(155, 109, 45, 0.18);
}

.alert-error {
  color: var(--color-danger);
  background: rgba(182, 76, 76, 0.1);
  border-color: rgba(182, 76, 76, 0.18);
}

.alert-info {
  color: var(--color-info);
  background: rgba(53, 110, 159, 0.1);
  border-color: rgba(53, 110, 159, 0.18);
}

.divider {
  height: 1px;
  margin: 1.25rem 0;
  background: var(--color-border);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(35, 53, 63, 0.32);
  backdrop-filter: blur(8px);
  z-index: 200;
}

.modal {
  width: min(100%, 460px);
  overflow: hidden;
}

.modal-header,
.modal-body {
  padding: 1.2rem 1.25rem;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-family: var(--font-headline);
  font-size: 1.2rem;
  font-weight: 700;
}

.modal-close {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--color-text-soft);
  font-size: 1.35rem;
  cursor: pointer;
}

.modal-tabs {
  display: flex;
  gap: 0.4rem;
  padding: 0 1.25rem 1rem;
}

.modal-tab {
  appearance: none;
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.75);
  color: var(--color-text-soft);
  border-radius: 999px;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
  font: inherit;
  font-size: 0.86rem;
  font-weight: 600;
}

.modal-tab.active {
  background: var(--color-primary-soft);
  color: var(--color-primary-dim);
}

.spinner {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: currentColor;
  animation: spin 0.8s linear infinite;
}

.text-small { font-size: 0.92rem; }
.text-tiny { font-size: 0.76rem; }
.text-dim { color: var(--color-text-soft); }
.text-accent { color: var(--color-primary); }
.hidden { display: none !important; }
.mb-4 { margin-bottom: 1rem; }
.mt-4 { margin-top: 1rem; }

.page-enter {
  animation: pageEnter 0.6s var(--trans-slow) both;
}

@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 980px) {
  .two-col,
  .chat-shell,
  .admin-layout {
    grid-template-columns: 1fr;
  }

  .sidebar,
  .admin-sidebar {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
}

@media (max-width: 720px) {
  .header {
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 0.8rem;
  }

  .header-nav {
    width: 100%;
    order: 3;
    overflow-x: auto;
  }

  .header-right {
    width: 100%;
    justify-content: space-between;
  }
}