* { box-sizing: border-box; }

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

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Inter", "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 24px;
  -webkit-font-smoothing: antialiased;
}

button, input, select, textarea { font: inherit; }
a { color: var(--color-primary); text-underline-offset: 3px; }

h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { font-size: 32px; line-height: 40px; font-weight: 700; }
h2 { font-size: 24px; line-height: 32px; font-weight: 700; }
h3 { font-size: 18px; line-height: 26px; font-weight: 600; }

.skip-link {
  position: fixed;
  top: var(--space-sm);
  left: var(--space-sm);
  z-index: 1100;
  transform: translateY(-160%);
  padding: 10px 12px;
  border-radius: var(--radius-control);
  background: var(--color-primary);
  color: #fff;
}

.skip-link:focus { transform: translateY(0); }

.eyebrow {
  margin: 0 0 var(--space-sm);
  color: var(--color-primary);
  font-size: 13px;
  line-height: 18px;
  font-weight: 700;
  letter-spacing: .08em;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 18px;
  border-radius: var(--radius-control);
  font-size: 14px;
  line-height: 20px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--motion-fast), background var(--motion-fast), border-color var(--motion-fast), box-shadow var(--motion-fast);
}

.button-primary {
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-button);
}

.button-primary:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary-hover);
  background: var(--color-primary-hover);
  color: #fff;
  box-shadow: 0 7px 16px rgba(64, 50, 200, .20);
}

.button-secondary {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}

.button-secondary:hover { border-color: var(--color-primary); background: var(--color-accent-bg); color: var(--color-text); }
.button-ghost { border: 1px solid transparent; background: transparent; color: var(--color-primary); }
.button-ghost:hover { background: var(--color-accent-bg); color: var(--color-primary); }
.button-danger { border: 1px solid var(--color-error); background: var(--color-error); color: #fff; }
.button-danger:hover { filter: brightness(.94); }

.button svg, .nav-link svg, .utility-link svg, .icon-button svg { width: 20px; height: 20px; stroke-width: 1.8; }

button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, dialog:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.form-control, .form-select {
  min-height: 44px;
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  color: var(--color-text);
}

.form-control:focus, .form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.form-control::placeholder { color: var(--color-placeholder); }

.message-list { margin-bottom: var(--space-lg); }
.notice { margin-top: var(--space-sm); padding: 12px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-control); }
.notice-success { border-color: var(--color-success); background: var(--color-success-bg); color: var(--color-success); }
.notice-error { border-color: var(--color-error); background: var(--color-error-bg); color: var(--color-error); }
.notice-info { background: var(--color-accent-bg); }

.section-error { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-md); margin: 0 0 var(--space-lg); }
.section-error[hidden] { display: none; }
.section-error p { margin: var(--space-xs) 0 0; }
.operation-id { color: var(--color-muted); font: 500 13px/18px ui-monospace, SFMono-Regular, Consolas, monospace; }

.loading-bar {
  position: fixed;
  top: var(--space-md);
  left: 50%;
  z-index: 1090;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  transform: translate(-50%, -150%);
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  box-shadow: var(--shadow-card-hover);
  transition: transform var(--motion-notice);
}

.loading-bar.is-visible { transform: translate(-50%, 0); }

.confirm-dialog {
  width: min(480px, calc(100% - 32px));
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-card-hover);
}

.confirm-dialog::backdrop { background: rgba(6, 27, 49, .48); }
.confirm-dialog form { margin: 0; padding: var(--space-lg); }
.confirm-dialog h2 { margin: var(--space-md) 0 var(--space-sm); }
.confirm-dialog p { margin: 0; color: var(--color-muted); }
.confirm-icon { display: grid; width: 44px; height: 44px; place-items: center; border-radius: 50%; background: var(--color-danger-surface); color: var(--color-error); }
.dialog-actions { display: flex; justify-content: flex-end; gap: var(--space-sm); margin-top: var(--space-lg); }

.session-dialog-icon { background: var(--color-accent-bg); color: var(--color-primary); }
.session-dialog .operation-id { margin-top: var(--space-md); overflow-wrap: anywhere; }
.session-dialog .dialog-actions { flex-wrap: wrap; }

.standalone-state {
  width: min(560px, calc(100% - 32px));
  margin: 10vh auto;
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.standalone-state h1 { margin: 0; }
.standalone-state > p:not(.eyebrow) { margin: var(--space-sm) 0 var(--space-lg); color: var(--color-muted); }

@media (max-width: 390px) {
  h1 { font-size: 24px; line-height: 32px; }
  h2 { font-size: 20px; line-height: 28px; }
  .section-error, .dialog-actions { align-items: stretch; flex-direction: column; }
  .dialog-actions .button { width: 100%; }
  .standalone-state { width: calc(100% - 16px); padding: var(--space-lg); }
}