/* Shared tokens — selaras dengan pos-cost-calculator.html */
:root {
  --sidebar-bg: #1a1a1a;
  --sidebar-text: #e8e8e8;
  --sidebar-muted: #9a9a9a;
  --sidebar-active: #2a2a2a;
  --sidebar-accent: #f5a623;
  --content-bg: #f4f4f5;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-muted: #5c5c5c;
  --border: #ddd;
  --success: #2e7d1e;
  --danger: #c0392b;
  --warning: #b7770d;
  --radius: 10px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* Alias untuk komponen sedia ada */
  --accent: var(--sidebar-accent);
  --accent-hover: #ffc44d;
  --accent-active: #d4921a;
  --accent-soft: rgba(245, 166, 35, 0.18);
  --accent-ring: rgba(245, 166, 35, 0.35);
  --bg-page: var(--content-bg);
  --surface-muted: #fafafa;
  --border-strong: #ccc;
  --radius-lg: var(--radius);
  --radius-md: 6px;
  --shadow-sm: var(--shadow);
  --shadow-md: var(--shadow);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1);

  /* Kawalan permukaan / segmen — seragam dengan .btn--outline & .kb-surface-btn */
  --kb-control-surface: var(--surface);
  --kb-control-surface-hover: var(--surface-muted);
  --kb-control-border: var(--border);
  --kb-control-border-strong: var(--border-strong);
  --kb-control-active-bar: var(--sidebar-accent);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--content-bg);
  color: var(--text);
  line-height: 1.55;
}

.app-wrap {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem;
}

.brand__name-accent {
  color: var(--sidebar-accent);
}

.brand__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius);
  background: var(--sidebar-bg);
  color: var(--sidebar-accent);
  font-size: 1.35rem;
  box-shadow: var(--shadow);
}

.brand__name {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.brand__tag {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

.card {
  width: 100%;
  max-width: 26.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 1.85rem 1.85rem;
}

.card--wide {
  max-width: 52rem;
}

.card__title {
  margin: 0 0 0.4rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.card__lead {
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.field {
  margin-bottom: 1.1rem;
}

.field__label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.field__input {
  width: 100%;
  padding: 0.55rem 0.65rem;
  font: inherit;
  font-size: 1rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field__input:hover {
  border-color: #bbb;
}

.field__input:focus {
  border-color: var(--sidebar-accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.field__input::placeholder {
  color: #888;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.65rem 1rem;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s, background 0.15s;
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--sidebar-bg);
  color: #fff;
}

.btn--primary:hover:not(:disabled) {
  opacity: 0.92;
}

.btn--primary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.btn--primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* Butang putih / sisi — sama corak hover, tekan, fokus seperti utama */
.btn--outline {
  background: var(--kb-control-surface);
  color: var(--text);
  border: 1px solid var(--kb-control-border-strong);
  box-shadow: none;
  transition:
    opacity 0.15s ease,
    transform 0.1s ease,
    background 0.15s ease,
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}

.btn--outline:hover:not(:disabled) {
  background: var(--kb-control-surface-hover);
  border-color: var(--text-muted);
  color: var(--text);
}

.btn--outline:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.btn--outline:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn--ghost {
  margin-top: 0.75rem;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--kb-control-border);
  transition:
    opacity 0.15s ease,
    transform 0.1s ease,
    background 0.15s ease,
    border-color 0.15s ease,
    color 0.15s ease,
    box-shadow 0.15s ease;
}

.btn--ghost:hover:not(:disabled) {
  background: var(--kb-control-surface-hover);
  color: var(--text);
  border-color: var(--kb-control-border-strong);
}

.btn--ghost:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.btn--ghost:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/**
 * Butang segmen / tab lebar permukaan (penapis papan pemuka, tab laporan, dll.)
 * Gabung dengan .is-active atau aria-selected="true" untuk keadaan pilihan.
 */
.kb-surface-btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  font: inherit;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    background 0.15s ease,
    color 0.15s ease,
    border-color 0.15s ease,
    box-shadow 0.15s ease,
    transform 0.1s ease;
}

.kb-surface-btn:hover:not(:disabled):not(.is-active):not([aria-selected="true"]) {
  color: var(--text);
  background: rgba(0, 0, 0, 0.045);
  border-color: transparent;
}

.kb-surface-btn:active:not(:disabled) {
  transform: scale(0.98);
}

.kb-surface-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.kb-surface-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.kb-surface-btn.is-active,
.kb-surface-btn[aria-selected="true"] {
  color: var(--text);
  background: var(--kb-control-surface);
  border-color: var(--kb-control-border);
  box-shadow:
    0 1px 3px rgba(0, 0, 0, 0.08),
    inset 0 -2px 0 0 var(--kb-control-active-bar);
}

.form-footer {
  margin-top: 1.25rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.form-footer a {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  border-bottom: 2px solid var(--sidebar-accent);
}

.form-footer a:hover {
  color: var(--sidebar-accent);
}

.hint {
  margin: 0.75rem 0 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.45;
}

.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;
}

/* Tajuk halaman standard — tajuk + pemisah + perihalan ringkas (BO / embed) */
.kb-page-header {
  margin-bottom: 0.85rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border);
}

.kb-page-header__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  margin-bottom: 0.5rem;
}

.kb-page-title {
  margin: 0;
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
}

.kb-page-lead {
  margin: 0;
  max-width: 46rem;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.kb-page-lead strong {
  color: var(--text);
  font-weight: 600;
}

@media (max-width: 480px) {
  .card {
    padding: 1.5rem 1.25rem;
  }
}