/* ===================================================
   Face2R — Dark Theme CSS
   Mobile-first, full-viewport camera UI
   All sizing in rem/% for dynamic scaling
   =================================================== */

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --color-bg: #0a0a0f;
  --color-surface: #1e1e2e;
  --color-text: #e0e0e0;
  --color-text-dim: #888;
  --color-green: #4caf50;
  --color-red: #f44336;
  --color-orange: #ff9800;
  --color-blue: #2196f3;

  /* Border radii */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 100%;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, textarea {
  font-family: inherit;
  color: inherit;
  user-select: text;
}

/* --- Camera Container --- */
#camera-container {
  position: fixed;
  inset: 0;
  background: #000;
}

#camera-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

#face-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* --- Face Boxes --- */
.face-box {
  position: absolute;
  border-radius: 0.25rem;
  pointer-events: auto;
}

.face-box.known {
  border: 0.125rem solid var(--color-green);
}

.face-box.unknown {
  border: 0.125rem dashed var(--color-orange);
}

.face-box.risk {
  border: 0.125rem solid var(--color-red);
}

/* --- Face Labels --- */
.face-label {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 0.25rem;
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.7);
  color: var(--color-text);
  text-align: center;
  pointer-events: none;
}

/* --- Risk Badges --- */
.badge-red {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  background: var(--color-red);
  color: #fff;
}

.badge-green {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  background: var(--color-green);
  color: #fff;
}

.badge-neutral {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.15);
  color: #ccc;
}

/* --- Status Bar (fixed top) --- */
#status-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  padding-top: calc(0.75rem + env(safe-area-inset-top, 0px));
  background: rgba(10, 10, 15, 0.65);
  backdrop-filter: blur(0.75rem);
  -webkit-backdrop-filter: blur(0.75rem);
  font-size: 0.8125rem;
}

.status-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-center {
  display: flex;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--color-text-dim);
}

.status-right {
  display: flex;
  align-items: center;
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

/* Sync dot indicator */
.sync-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-green);
  flex-shrink: 0;
}

.sync-dot.syncing {
  animation: pulse 1.2s ease-in-out infinite;
}

.sync-dot.offline {
  background: var(--color-red);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* --- Toolbar (fixed bottom) --- */
#toolbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  padding-bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  background: rgba(10, 10, 15, 0.65);
  backdrop-filter: blur(0.75rem);
  -webkit-backdrop-filter: blur(0.75rem);
}

.toolbar-btn {
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-text);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  transition: background 0.2s;
}

.toolbar-btn:active {
  background: rgba(255, 255, 255, 0.2);
}

/* Capture button */
.capture-btn {
  width: 3.75rem;
  height: 3.75rem;
  border-radius: 50%;
  border: 0.1875rem solid #fff;
  background: transparent;
  position: relative;
  transition: background 0.15s;
}

.capture-btn:active {
  background: rgba(255, 255, 255, 0.25);
}

.capture-btn::after {
  content: "";
  position: absolute;
  inset: 0.25rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
}

/* --- PIN Screen --- */
#pin-screen {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
}

#pin-screen .pin-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 2rem;
  letter-spacing: 0.125rem;
}

#pin-screen .pin-input {
  width: 60%;
  max-width: 12.5rem;
  padding: 0.875rem 1rem;
  font-size: 1.5rem;
  letter-spacing: 0.5rem;
  text-align: center;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color 0.2s;
}

#pin-screen .pin-input:focus {
  border-color: var(--color-blue);
}

#pin-screen .pin-submit {
  margin-top: 1.25rem;
  padding: 0.75rem 2.5rem;
  font-size: 1rem;
  font-weight: 600;
  background: var(--color-blue);
  color: #fff;
  border-radius: var(--radius-md);
  transition: opacity 0.2s;
}

#pin-screen .pin-submit:active {
  opacity: 0.8;
}

#pin-screen .pin-error {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--color-red);
  min-height: 1.25rem;
}

/* --- Loading Screen --- */
#loading-screen {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
}

.loading-bar-track {
  width: 60%;
  max-width: 15rem;
  height: 0.375rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 0.1875rem;
  overflow: hidden;
}

.loading-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-blue), var(--color-green));
  border-radius: 0.1875rem;
  transition: width 0.3s ease;
}

.loading-status {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--color-text-dim);
}

/* --- Low-Light Warning --- */
#low-light-warning {
  position: fixed;
  top: calc(3rem + env(safe-area-inset-top, 0px));
  left: 1rem;
  right: 1rem;
  z-index: 110;
  padding: 0.625rem 1rem;
  text-align: center;
  font-size: 0.8125rem;
  font-weight: 500;
  color: #fff;
  background: rgba(255, 152, 0, 0.85);
  border-radius: var(--radius-sm);
  pointer-events: none;
}

/* --- Modal Overlay (Bottom Sheet) --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-sheet {
  position: relative;
  width: 100%;
  max-width: 31.25rem;
  max-height: 85vh;
  overflow-y: auto;
  background: var(--color-surface);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: 1.5rem 1.25rem;
  padding-bottom: calc(1.5rem + env(safe-area-inset-bottom, 0px));
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active .modal-sheet {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-text-dim);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  transition: background 0.2s;
}

.modal-close:active {
  background: rgba(255, 255, 255, 0.15);
}

/* --- Modal Form Inputs --- */
.modal-sheet input[type="text"],
.modal-sheet textarea {
  width: 100%;
  padding: 0.75rem 0.875rem;
  margin-bottom: 0.75rem;
  font-size: 0.9375rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  outline: none;
  transition: border-color 0.2s;
}

.modal-sheet input[type="text"]:focus,
.modal-sheet textarea:focus {
  border-color: var(--color-blue);
}

.modal-sheet textarea {
  min-height: 5rem;
  resize: vertical;
}

.modal-sheet input::placeholder,
.modal-sheet textarea::placeholder {
  color: var(--color-text-dim);
}

/* Captured face preview */
.captured-face-preview {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

.captured-face-preview canvas {
  width: 5rem;
  height: 5rem;
  border-radius: var(--radius-sm);
  border: 0.125rem solid rgba(255, 255, 255, 0.1);
}

/* Risk selector buttons */
.risk-selector {
  display: flex;
  gap: 0.5rem;
  margin: 0.75rem 0;
}

.risk-btn {
  flex: 1;
  padding: 0.625rem 0;
  font-size: 0.8125rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-sm);
  border: 0.125rem solid transparent;
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-dim);
  transition: all 0.2s;
}

.risk-btn.selected {
  color: #fff;
}

.risk-btn[data-risk="green"].selected {
  background: rgba(76, 175, 80, 0.2);
  border-color: var(--color-green);
  color: var(--color-green);
}

.risk-btn[data-risk="neutral"].selected {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--color-text);
}

.risk-btn[data-risk="red"].selected {
  background: rgba(244, 67, 54, 0.2);
  border-color: var(--color-red);
  color: var(--color-red);
}

.risk-btn:active {
  opacity: 0.8;
}

/* Save button */
.btn-save {
  width: 100%;
  padding: 0.875rem;
  margin-top: 1rem;
  font-size: 1rem;
  font-weight: 600;
  background: var(--color-blue);
  color: #fff;
  border-radius: var(--radius-md);
  transition: opacity 0.2s;
}

.btn-save:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-save:not(:disabled):active {
  opacity: 0.8;
}

/* Confidence notice */
.confidence-notice {
  margin-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--color-text-dim);
  text-align: center;
  min-height: 1rem;
}

/* --- Known-Face Quick Panel --- */
#known-face-panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 400;
  max-width: 31.25rem;
  margin: 0 auto;
  background: var(--color-surface);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: 1.25rem;
  padding-bottom: calc(1.25rem + env(safe-area-inset-bottom, 0px));
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#known-face-panel.active {
  transform: translateY(0);
}

.qp-header {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 0.5rem;
}

.qp-name {
  font-size: 1.125rem;
  font-weight: 700;
}

.qp-match {
  font-size: 0.8125rem;
  color: var(--color-text-dim);
  margin-left: auto;
}

.qp-notes {
  font-size: 0.8125rem;
  color: var(--color-text-dim);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

/* Confidence bar */
.confidence-bar {
  width: 100%;
  height: 0.375rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 0.1875rem;
  overflow: hidden;
  margin-bottom: 0.25rem;
}

.confidence-bar-fill {
  height: 100%;
  border-radius: 0.1875rem;
  background: linear-gradient(90deg, var(--color-orange), var(--color-green));
  transition: width 0.3s ease;
}

.confidence-percentage {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
}

.confidence-recommendation {
  font-size: 0.75rem;
  color: var(--color-text-dim);
  margin-top: 0.125rem;
  margin-bottom: 0.75rem;
}

/* Quick panel action buttons */
.qp-actions {
  display: flex;
  gap: 0.5rem;
}

.qp-actions button {
  flex: 1;
  padding: 0.625rem 0;
  font-size: 0.8125rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
  transition: background 0.2s;
}

.qp-actions button:active {
  background: rgba(255, 255, 255, 0.15);
}

/* --- Toast Notification --- */
#toast {
  position: fixed;
  bottom: 15%;
  left: 50%;
  transform: translateX(-50%) translateY(1.25rem);
  z-index: 600;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #fff;
  background: rgba(30, 30, 46, 0.92);
  border-radius: var(--radius-md);
  max-width: calc(100% - 3rem);
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
}

#toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* --- Utility --- */
.hidden {
  display: none !important;
}