:root {
  --ft-font-sans: "Inter", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --ft-font-mono: "DM Mono", "SFMono-Regular", "Menlo", "Monaco", "Consolas", monospace;
  --ft-font-display: "DM Serif Display", Georgia, serif;

  /* Dark theme */
  --ft-color-bg: #06090c;
  --ft-color-bg-deep: #04070a;
  --ft-color-surface: rgba(10, 16, 22, 0.94);
  --ft-color-surface-soft: rgba(10, 16, 22, 0.7);
  --ft-color-surface-alt: rgba(14, 20, 28, 0.9);
  --ft-color-surface-raised: rgba(16, 24, 32, 0.96);
  --ft-color-line: rgba(43, 127, 147, 0.1);
  --ft-color-line-strong: rgba(77, 184, 204, 0.2);
  --ft-color-text: #ebeff3;
  --ft-color-text-soft: rgba(235, 239, 243, 0.52);
  --ft-color-text-faint: rgba(235, 239, 243, 0.3);
  --ft-color-cyan: #2b7f93;
  --ft-color-cyan-strong: #3aa8b8;
  --ft-color-cyan-soft: rgba(43, 127, 147, 0.08);
  --ft-color-warning: #e0894a;
  --ft-color-danger: #e0605a;
  --ft-color-success: #4ade80;
  --ft-color-info: #6366f1;

  --ft-radius-sm: 6px;
  --ft-radius-md: 10px;
  --ft-radius-lg: 16px;
  --ft-container: min(1440px, calc(100% - 32px));
  --ft-shadow-soft: 0 2px 10px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --ft-shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --ft-shadow-modal: 0 4px 12px rgba(0, 0, 0, 0.5);

  --ft-report-line: rgba(43, 127, 147, 0.15);
  --ft-report-line-strong: rgba(43, 127, 147, 0.25);
  --ft-report-surface-strong: rgba(43, 127, 147, 0.08);

  --ft-transition: 240ms cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--ft-font-sans);
  font-size: 1rem;
  color: var(--ft-color-text);
  background-color: var(--ft-color-bg);
}

a {
  color: var(--ft-color-cyan);
  text-decoration: none;
  transition: opacity var(--ft-transition);
}
a:hover {
  opacity: 0.8;
}

input[type="text"],
input[type="search"],
input[type="number"],
input[type="email"],
input[type="password"],
input[type="file"],
select,
textarea {
  width: 100%;
  box-sizing: border-box;
  min-height: 40px;
  font-size: 1rem;
  line-height: 1.5;
  padding: 8px 12px;
  border: 1px solid var(--ft-color-line-strong);
  border-radius: var(--ft-radius-sm);
  background: var(--ft-color-surface);
  color: var(--ft-color-text);
  transition: all var(--ft-transition);
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

input[type="file"] {
  padding: 9px 12px;
}

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

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--ft-color-cyan);
  box-shadow: 0 0 0 3px rgba(43, 127, 147, 0.12);
}

button,
.button,
.submit-button,
.search-button,
.manual-button,
.bulk-button,
.nav-button,
.mode-button,
.btn-print-pdf,
.ft-button,
.ft-btn,
.admin-button,
.admin-quick-button {
  font-size: 0.9375rem;
  font-weight: 500;
  min-height: 40px;
  padding: 8px 16px;
  border-radius: var(--ft-radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--ft-color-cyan);
  background: var(--ft-color-cyan);
  color: #fff;
  transition: all var(--ft-transition);
  box-sizing: border-box;
  font-family: inherit;
  text-decoration: none;
}

button:hover,
.button:hover,
.submit-button:hover,
.search-button:hover,
.manual-button:hover,
.bulk-button:hover,
.nav-button:hover,
.mode-button:hover,
.btn-print-pdf:hover,
.ft-button:hover,
.ft-btn:hover,
.admin-button:hover,
.admin-quick-button:hover {
  border-color: var(--ft-color-cyan-strong);
  background: var(--ft-color-cyan-strong);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(43, 127, 147, 0.25);
  color: #fff;
}

button:disabled,
.button:disabled,
.submit-button:disabled,
.search-button:disabled,
.manual-button:disabled,
.bulk-button:disabled,
.nav-button:disabled,
.mode-button:disabled,
.btn-print-pdf:disabled,
.ft-button:disabled,
.admin-button:disabled,
.admin-quick-button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
  border-color: var(--ft-color-line);
  color: var(--ft-color-text-faint);
  background: transparent;
  transform: none;
  box-shadow: none;
}

.ft-button--secondary,
.ft-btn--secondary,
.nav-button,
.mode-button,
.btn-print-pdf,
.admin-button,
.admin-quick-button {
  border-color: var(--ft-color-line-strong);
  color: var(--ft-color-text);
  background: transparent;
}

.ft-button--secondary:hover,
.ft-btn--secondary:hover,
.nav-button:hover,
.mode-button:hover,
.btn-print-pdf:hover,
.admin-button:hover,
.admin-quick-button:hover {
  border-color: rgba(43, 127, 147, 0.2);
  background: rgba(43, 127, 147, 0.06);
  color: var(--ft-color-cyan);
  box-shadow: none;
  transform: none;
}

.mode-button.selected,
.mode-button.is-active,
.ft-button--accent {
  border-color: rgba(43, 127, 147, 0.2);
  background: var(--ft-color-cyan-soft);
  color: var(--ft-color-cyan);
}

.ft-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ft-color-text-soft);
  letter-spacing: 0.02em;
  margin-bottom: 4px;
}

.ft-section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--ft-color-text);
  line-height: 1.2;
}

.ft-card {
  border: 1px solid var(--ft-color-line);
  border-radius: var(--ft-radius-md);
  background: var(--ft-color-surface);
  box-shadow: var(--ft-shadow-card);
  padding: 24px;
}

/* ——— Minimal header (403/404 error pages) ——— */

.ft-minimal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  border-bottom: 1px solid var(--ft-color-line);
  background: var(--ft-color-surface);
}

.ft-minimal-header__logo {
  font-family: var(--ft-font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--ft-color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.ft-minimal-header__dot {
  color: var(--ft-color-cyan);
}

.ft-minimal-header__signin {
  font-size: 14px;
  font-weight: 500;
  color: var(--ft-color-cyan);
  text-decoration: none;
  padding: 6px 16px;
  border: 1px solid var(--ft-color-cyan);
  border-radius: var(--ft-radius-sm);
  transition: background 0.15s, color 0.15s;
}

.ft-minimal-header__signin:hover {
  background: var(--ft-color-cyan);
  color: #fff;
}

/* ——— Breadcrumb ——— */

.ft-breadcrumb {
  padding: 8px 0;
  border-bottom: 1px solid var(--ft-color-line);
}

.ft-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0 24px;
  max-width: var(--ft-container);
}

.ft-breadcrumb li {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--ft-color-text-faint);
}

.ft-breadcrumb li + li::before {
  content: "/";
  color: var(--ft-color-line-strong);
  margin-right: 4px;
}

.ft-breadcrumb a {
  color: var(--ft-color-text-soft);
  text-decoration: none;
  transition: color 0.15s;
}

.ft-breadcrumb a:hover {
  color: var(--ft-color-cyan);
}

.ft-breadcrumb [aria-current="page"] {
  color: var(--ft-color-text);
  font-weight: 500;
}

/* ——— Footer multi-column layout ——— */

.ft-footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--ft-color-line);
  margin-bottom: 16px;
}

.ft-footer-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ft-footer-col__title {
  font-size: 13px;
  font-weight: 600;
  color: var(--ft-color-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.ft-footer-col a {
  font-size: 13px;
  color: var(--ft-color-text-soft);
  text-decoration: none;
  transition: color 0.15s;
}

.ft-footer-col a:hover {
  color: var(--ft-color-cyan);
}

.ft-footer-bottom {
  font-size: 12px;
  color: var(--ft-color-text-faint);
  margin-top: 14px;
  padding-top: 6px;
  padding-bottom: 4px;
  text-align: center;
}

@media (max-width: 760px) {
  .ft-footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .ft-footer-grid {
    grid-template-columns: 1fr;
  }
}