/* ============================================================
   ZYDROP — Apple Liquid Glass Design System
   Zylink Corp Design Language v1.0
   ============================================================ */

/* ---- Design Tokens ---- */
:root {
  /* Color System */
  --color-blue:       #007AFF;
  --color-blue-dark:  #0056CC;
  --color-green:      #34C759;
  --color-orange:     #FF9500;
  --color-red:        #FF3B30;
  --color-purple:     #AF52DE;
  --color-pink:       #FF2D55;
  --color-teal:       #5AC8FA;

  --color-bg:         #F2F2F7;
  --color-surface:    rgba(255, 255, 255, 0.72);
  --color-surface-hover: rgba(255, 255, 255, 0.88);
  --color-surface-solid: #FFFFFF;
  --color-text-primary:   #1D1D1F;
  --color-text-secondary: #86868B;
  --color-text-tertiary:  #AEAEB2;
  --color-separator:  rgba(60, 60, 67, 0.12);
  --color-overlay:    rgba(0, 0, 0, 0.08);

  /* Glass */
  --glass-blur:   blur(40px) saturate(180%);
  --glass-border: 1px solid rgba(255, 255, 255, 0.5);
  --glass-shadow: \
    0 0 0 0.5px rgba(0, 0, 0, 0.04),
    0 2px 8px rgba(0, 0, 0, 0.04),
    0 8px 24px rgba(0, 0, 0, 0.06),
    0 24px 48px rgba(0, 0, 0, 0.06);
  --glass-shadow-elevated: \
    0 0 0 0.5px rgba(0, 0, 0, 0.06),
    0 4px 12px rgba(0, 0, 0, 0.06),
    0 16px 40px rgba(0, 0, 0, 0.1),
    0 32px 64px rgba(0, 0, 0, 0.08);

  /* Squircle Radii (8pt grid) */
  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  24px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  /* Typography — SF Pro / Inter */
  --font-system: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', sans-serif;
  --font-mono:   'SF Mono', ui-monospace, 'Cascadia Code', monospace;

  --text-xs:   11px;
  --text-sm:   13px;
  --text-base: 15px;
  --text-md:   17px;
  --text-lg:   22px;
  --text-xl:   28px;
  --text-2xl:  34px;
  --text-3xl:  48px;

  --weight-regular: 400;
  --weight-medium:  500;
  --weight-semibold: 600;
  --weight-bold:    700;
  --weight-heavy:   800;

  --leading-tight:  1.15;
  --leading-normal: 1.35;
  --leading-relaxed: 1.55;

  /* Spring-Based Easing */
  --ease-spring:   cubic-bezier(0.175, 0.885, 0.32, 1.1);
  --ease-smooth:   cubic-bezier(0.25, 0.1, 0.25, 1.0);
  --ease-out:      cubic-bezier(0.0, 0.0, 0.2, 1.0);
  --ease-in-out:   cubic-bezier(0.42, 0, 0.58, 1.0);
  --ease-bounce:   cubic-bezier(0.34, 1.56, 0.64, 1.0);

  /* Spacing (8pt grid) */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Transitions */
  --duration-fast:   150ms;
  --duration-normal: 250ms;
  --duration-slow:   400ms;
  --duration-slower: 600ms;

  /* Safe areas */
  --safe-top:    env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left:   env(safe-area-inset-left, 0px);
  --safe-right:  env(safe-area-inset-right, 0px);
}

/* ---- Reset & Base ---- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
  height: 100%;
}

body {
  font-family: var(--font-system);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background: var(--color-bg);
  height: 100%;
  overflow: hidden;
  position: relative;
}

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
  outline: none;
  -webkit-user-select: none;
  user-select: none;
}

button:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---- Animated Background Mesh ---- */
.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  will-change: transform;
}

.bg-orb--1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 122, 255, 0.35), transparent 70%);
  top: -10%;
  right: -5%;
  animation: orbFloat1 20s ease-in-out infinite;
}

.bg-orb--2 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(175, 82, 222, 0.3), transparent 70%);
  bottom: -8%;
  left: -8%;
  animation: orbFloat2 25s ease-in-out infinite;
}

.bg-orb--3 {
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(90, 200, 250, 0.3), transparent 70%);
  top: 40%;
  left: 50%;
  animation: orbFloat3 18s ease-in-out infinite;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(-40px, 60px) scale(1.1); }
  66%      { transform: translate(30px, -30px) scale(0.95); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(50px, -40px) scale(1.05); }
  66%      { transform: translate(-30px, 50px) scale(0.9); }
}

@keyframes orbFloat3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(-60px, 40px) scale(1.15); }
}

/* ---- App Shell ---- */
#app {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* ---- View System ---- */
.view {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transform: translateX(32px) scale(0.96);
  transition:
    opacity var(--duration-slow) var(--ease-spring),
    visibility var(--duration-slow) var(--ease-spring),
    transform var(--duration-slow) var(--ease-spring);
  will-change: transform, opacity;
}

.view--active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0) scale(1);
}

.view--slide-out {
  opacity: 0;
  transform: translateX(-32px) scale(0.96);
}

.view-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  padding: var(--space-4) var(--space-4) calc(var(--space-16) + var(--safe-bottom));
}

/* ---- Navigation Header ---- */
.nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  padding-top: calc(var(--space-3) + var(--safe-top));
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  background: var(--color-surface);
  border-bottom: var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-title {
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  letter-spacing: -0.2px;
}

.nav-spacer {
  width: 40px;
}

.btn-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  font-size: var(--text-md);
  color: var(--color-blue);
  transition: background var(--duration-fast) var(--ease-smooth);
}

.btn-icon:active {
  background: var(--color-overlay);
}

/* ---- Glass Card ---- */
.glass-card {
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-shadow);
  padding: var(--space-6);
}

/* ============ HOME VIEW ============ */
.home-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  padding: var(--space-8) var(--space-6);
  gap: var(--space-10);
}

.home-brand {
  text-align: center;
  animation: fadeSlideUp var(--duration-slower) var(--ease-spring) both;
}

.home-icon {
  width: 96px;
  height: 96px;
  border-radius: 23%;
  background: linear-gradient(145deg, var(--color-blue), var(--color-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
  box-shadow:
    0 8px 32px rgba(0, 122, 255, 0.3),
    0 2px 8px rgba(0, 0, 0, 0.1);
  animation: iconPulse 3s ease-in-out infinite;
}

.home-icon i {
  font-size: 40px;
  color: white;
}

@keyframes iconPulse {
  0%, 100% { transform: scale(1); box-shadow: 0 8px 32px rgba(0, 122, 255, 0.3), 0 2px 8px rgba(0, 0, 0, 0.1); }
  50%      { transform: scale(1.04); box-shadow: 0 12px 40px rgba(0, 122, 255, 0.4), 0 4px 12px rgba(0, 0, 0, 0.12); }
}

.home-title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-heavy);
  letter-spacing: -1.5px;
  line-height: var(--leading-tight);
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.home-subtitle {
  font-size: var(--text-md);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
  font-weight: var(--weight-regular);
}

.home-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
  max-width: 380px;
  animation: fadeSlideUp var(--duration-slower) var(--ease-spring) 100ms both;
}

.action-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-5);
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-shadow);
  text-align: left;
  transition:
    transform var(--duration-normal) var(--ease-spring),
    box-shadow var(--duration-normal) var(--ease-smooth),
    background var(--duration-fast) var(--ease-smooth);
  will-change: transform;
}

.action-card:active {
  transform: scale(0.97);
  background: var(--color-surface-hover);
}

.action-card__icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: white;
  flex-shrink: 0;
}

.action-card--send .action-card__icon {
  background: linear-gradient(145deg, var(--color-blue), var(--color-teal));
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
}

.action-card--receive .action-card__icon {
  background: linear-gradient(145deg, var(--color-green), #30D158);
  box-shadow: 0 4px 16px rgba(52, 199, 89, 0.3);
}

.action-card__text {
  flex: 1;
  min-width: 0;
}

.action-card__label {
  display: block;
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  letter-spacing: -0.2px;
}

.action-card__desc {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.action-card__chevron {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.home-hint {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  text-align: center;
  animation: fadeSlideUp var(--duration-slower) var(--ease-spring) 200ms both;
}

@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ DROP ZONE ============ */
.drop-zone {
  border: 2px dashed var(--color-separator);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-6);
  text-align: center;
  cursor: pointer;
  transition:
    border-color var(--duration-fast) var(--ease-smooth),
    background var(--duration-fast) var(--ease-smooth),
    transform var(--duration-normal) var(--ease-spring);
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.drop-zone:active,
.drop-zone.drag-over {
  border-color: var(--color-blue);
  background: rgba(0, 122, 255, 0.06);
  transform: scale(0.98);
}

.drop-zone__icon {
  font-size: 48px;
  color: var(--color-blue);
  margin-bottom: var(--space-4);
  display: block;
}

.drop-zone__text {
  font-size: var(--text-md);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}

.drop-zone__hint {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* ============ FILE LIST ============ */
.file-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin: var(--space-4) 0;
  max-height: 240px;
  overflow-y: auto;
}

.file-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  animation: fileSlideIn var(--duration-normal) var(--ease-spring) both;
}

@keyframes fileSlideIn {
  from {
    opacity: 0;
    transform: translateX(-12px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

.file-item__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.file-item__icon--image  { background: rgba(255, 45, 85, 0.12);  color: var(--color-pink); }
.file-item__icon--video  { background: rgba(175, 82, 222, 0.12); color: var(--color-purple); }
.file-item__icon--audio  { background: rgba(255, 149, 0, 0.12);  color: var(--color-orange); }
.file-item__icon--pdf    { background: rgba(255, 59, 48, 0.12);  color: var(--color-red); }
.file-item__icon--doc    { background: rgba(0, 122, 255, 0.12);  color: var(--color-blue); }
.file-item__icon--zip    { background: rgba(52, 199, 89, 0.12);  color: var(--color-green); }
.file-item__icon--code   { background: rgba(90, 200, 250, 0.12); color: var(--color-teal); }
.file-item__icon--other  { background: var(--color-overlay);     color: var(--color-text-secondary); }

.file-item__info {
  flex: 1;
  min-width: 0;
}

.file-item__name {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-item__size {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: 1px;
}

.file-item__remove {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
  transition: color var(--duration-fast) var(--ease-smooth), background var(--duration-fast) var(--ease-smooth);
  flex-shrink: 0;
}

.file-item__remove:active {
  color: var(--color-red);
  background: rgba(255, 59, 48, 0.1);
}

/* ============ BUTTONS ============ */
.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  height: 52px;
  border-radius: var(--radius-lg);
  background: var(--color-blue);
  color: white;
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  letter-spacing: -0.2px;
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.08),
    0 4px 12px rgba(0, 122, 255, 0.3);
  transition:
    transform var(--duration-normal) var(--ease-spring),
    box-shadow var(--duration-normal) var(--ease-smooth),
    opacity var(--duration-fast) var(--ease-smooth);
  margin-top: var(--space-4);
}

.btn-primary:active {
  transform: scale(0.97);
}

.btn-primary:disabled {
  opacity: 0.4;
  pointer-events: none;
}

.btn-secondary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  color: var(--color-red);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  box-shadow: var(--glass-shadow);
  transition:
    transform var(--duration-normal) var(--ease-spring),
    background var(--duration-fast) var(--ease-smooth);
  margin-top: var(--space-3);
}

.btn-secondary:active {
  transform: scale(0.97);
  background: var(--color-surface-hover);
}

/* ============ STEP INDICATOR ============ */
.step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: var(--space-4);
}

.step-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--color-text-tertiary);
  transition: all var(--duration-normal) var(--ease-spring);
}

.step-dot--active {
  background: var(--color-blue);
  box-shadow: 0 0 8px rgba(0, 122, 255, 0.4);
  transform: scale(1.2);
}

.step-dot--done {
  background: var(--color-green);
  box-shadow: 0 0 8px rgba(52, 199, 89, 0.4);
}

.step-line {
  width: 48px;
  height: 2px;
  background: var(--color-separator);
  margin: 0 var(--space-2);
  border-radius: 1px;
  transition: background var(--duration-normal) var(--ease-smooth);
}

.step-line--active {
  background: var(--color-blue);
}

.step-label {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
}

/* ============ QR CODE DISPLAY ============ */
.qr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-8);
  animation: scaleIn var(--duration-slow) var(--ease-spring) both;
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to   { opacity: 1; transform: scale(1); }
}

.qr-container {
  background: white;
  border-radius: var(--radius-md);
  padding: var(--space-3);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-container canvas,
.qr-container img {
  display: block !important;
  border-radius: 4px;
}

.qr-hint {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-align: center;
}

/* ============ SCANNER ============ */
.scanner-card {
  overflow: hidden;
  padding: var(--space-3);
  animation: scaleIn var(--duration-slow) var(--ease-spring) both;
}

.scanner-container {
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

.scanner-container video {
  border-radius: var(--radius-md) !important;
  width: 100% !important;
  object-fit: cover !important;
}

.scanner-hint {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-3);
  padding-bottom: var(--space-2);
}

/* Hide html5-qrcode default UI elements */
#send-scanner__dashboard_section,
#receive-scanner__dashboard_section,
#send-scanner__header_message,
#receive-scanner__header_message {
  display: none !important;
}

/* ============ TRANSFER CARD ============ */
.transfer-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  animation: scaleIn var(--duration-slow) var(--ease-spring) both;
  max-width: 360px;
  margin: 0 auto;
}

.transfer-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: var(--space-5);
}

.transfer-icon--sending {
  background: linear-gradient(145deg, var(--color-blue), var(--color-teal));
  color: white;
  box-shadow: 0 6px 24px rgba(0, 122, 255, 0.35);
  animation: pulseSend 1.5s ease-in-out infinite;
}

.transfer-icon--receiving {
  background: linear-gradient(145deg, var(--color-green), #30D158);
  color: white;
  box-shadow: 0 6px 24px rgba(52, 199, 89, 0.35);
  animation: pulseReceive 1.5s ease-in-out infinite;
}

.transfer-icon--done {
  background: linear-gradient(145deg, var(--color-green), #30D158);
  color: white;
  box-shadow: 0 6px 24px rgba(52, 199, 89, 0.35);
  animation: bounceIn var(--duration-slow) var(--ease-bounce) both;
}

@keyframes pulseSend {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

@keyframes pulseReceive {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(6px); }
}

@keyframes bounceIn {
  0%   { transform: scale(0.3); opacity: 0; }
  50%  { transform: scale(1.1); }
  70%  { transform: scale(0.95); }
  100% { transform: scale(1); opacity: 1; }
}

.transfer-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  letter-spacing: -0.3px;
  margin-bottom: var(--space-6);
  width: 100%;
}

.progress-track {
  width: 100%;
  height: 8px;
  background: rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-blue), var(--color-teal));
  transition: width var(--duration-normal) var(--ease-smooth);
  box-shadow: 0 0 12px rgba(0, 122, 255, 0.3);
}

.progress-fill--receive {
  background: linear-gradient(90deg, var(--color-green), #30D158);
  box-shadow: 0 0 12px rgba(52, 199, 89, 0.3);
}

.transfer-stats {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  width: 100%;
  margin-top: var(--space-3);
}

.stat-percent {
  font-size: var(--text-md);
  font-weight: var(--weight-bold);
  color: var(--color-blue);
  font-variant-numeric: tabular-nums;
}

.stat-speed {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
}

.transfer-current {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.transfer-summary {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
}

.transfer-card--success {
  padding: var(--space-10) var(--space-6);
}

.transfer-card--success .btn-primary {
  margin-top: var(--space-3);
}

.transfer-card--success .btn-secondary {
  color: var(--color-blue);
}

/* ============ RECEIVED FILES LIST ============ */
.received-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  margin-bottom: var(--space-5);
  max-height: 300px;
  overflow-y: auto;
}

.received-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-lg);
  animation: fileSlideIn var(--duration-normal) var(--ease-spring) both;
}

.received-item__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  background: rgba(52, 199, 89, 0.12);
  color: var(--color-green);
}

.received-item__info {
  flex: 1;
  min-width: 0;
}

.received-item__name {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.received-item__size {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.received-item__save {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-blue);
  font-size: var(--text-base);
  transition: background var(--duration-fast) var(--ease-smooth);
}

.received-item__save:active {
  background: rgba(0, 122, 255, 0.1);
}

/* ============ STEP VISIBILITY ============ */
.step--hidden {
  display: none !important;
}

/* ============ TOAST NOTIFICATIONS ============ */
.toast-container {
  position: fixed;
  top: calc(var(--space-4) + var(--safe-top));
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  pointer-events: none;
  width: calc(100% - var(--space-8));
  max-width: 400px;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-solid);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow-elevated);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  pointer-events: auto;
  animation: toastIn var(--duration-normal) var(--ease-spring) both;
  width: 100%;
}

.toast--error {
  border-color: rgba(255, 59, 48, 0.2);
}

.toast--error i {
  color: var(--color-red);
}

.toast--success {
  border-color: rgba(52, 199, 89, 0.2);
}

.toast--success i {
  color: var(--color-green);
}

.toast--info i {
  color: var(--color-blue);
}

.toast--exit {
  animation: toastOut var(--duration-normal) var(--ease-smooth) both;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(-16px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateY(-16px) scale(0.95);
  }
}

/* ============ HOME LAYOUT ============ */
.home-section {
  width: 100%;
  max-width: 380px;
  animation: fadeSlideUp var(--duration-slower) var(--ease-spring) both;
}

.home-section:nth-child(2) { animation-delay: 100ms; }
.home-section:nth-child(3) { animation-delay: 200ms; }

.section-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-1);
}

.section-desc {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.home-actions--row {
  flex-direction: row;
  gap: var(--space-3);
}

.home-actions--row .action-card {
  flex: 1;
  flex-direction: column;
  padding: var(--space-5) var(--space-4);
  gap: var(--space-3);
  text-align: center;
}

.home-actions--row .action-card__chevron { display: none; }

.action-card--beam-send .action-card__icon {
  background: linear-gradient(145deg, var(--color-orange), #FF6B00);
  box-shadow: 0 4px 16px rgba(255, 149, 0, 0.35);
}

.action-card--beam-receive .action-card__icon {
  background: linear-gradient(145deg, var(--color-purple), #8B5CF6);
  box-shadow: 0 4px 16px rgba(175, 82, 222, 0.35);
}

/* ============ CODE DISPLAY ============ */
.code-display-card,
.code-input-card {
  text-align: center;
  padding: var(--space-10) var(--space-6);
  animation: scaleIn var(--duration-slow) var(--ease-spring) both;
}

.code-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-5);
}

.code-digits {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  font-family: 'SF Mono', ui-monospace, 'Cascadia Code', monospace;
}

.code-digits span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 68px;
  font-size: 32px;
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  background: rgba(0, 0, 0, 0.03);
  border-radius: var(--radius-md);
  letter-spacing: 0;
}

.code-hint {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-top: var(--space-5);
}

/* ============ CODE INPUT ============ */
.code-input-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.code-separator {
  font-size: 24px;
  font-weight: var(--weight-bold);
  color: var(--color-text-tertiary);
  width: var(--space-3);
  text-align: center;
}

.code-digit-input {
  width: 48px;
  height: 62px;
  text-align: center;
  font-size: 28px;
  font-weight: var(--weight-bold);
  font-family: 'SF Mono', ui-monospace, 'Cascadia Code', monospace;
  border: 2px solid var(--color-separator);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.02);
  color: var(--color-text-primary);
  outline: none;
  transition:
    border-color var(--duration-fast) var(--ease-smooth),
    box-shadow var(--duration-fast) var(--ease-smooth),
    transform var(--duration-normal) var(--ease-spring);
  caret-color: var(--color-blue);
}

.code-digit-input:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.15);
  transform: scale(1.04);
}

.code-digit-input.filled {
  border-color: var(--color-blue);
  background: rgba(0, 122, 255, 0.04);
}

/* ============ WAITING PULSE ============ */
.waiting-pulse {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.waiting-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-blue);
  animation: waitingPulse 1.5s ease-in-out infinite;
}

@keyframes waitingPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%      { transform: scale(1.6); opacity: 0.4; }
}

/* ============ BEAM MODE ============ */
.beam-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-4) !important;
  animation: scaleIn var(--duration-slow) var(--ease-spring) both;
  overflow: hidden;
}

.beam-qr-wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.04);
}

.beam-qr-container {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.beam-qr-container canvas {
  width: 100% !important;
  height: 100% !important;
  border-radius: var(--radius-sm);
}

.beam-info {
  width: 100%;
  margin-top: var(--space-5);
}

.beam-stats-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.beam-stat {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
}

.beam-stat--dim {
  color: var(--color-text-tertiary);
}

.beam-scan-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.beam-scan-hint i {
  color: var(--color-orange);
  font-size: var(--text-md);
}

.progress-track--beam {
  margin-bottom: var(--space-1);
}

.progress-fill--beam {
  background: linear-gradient(90deg, var(--color-orange), #FF6B00);
  box-shadow: 0 0 12px rgba(255, 149, 0, 0.35);
}

.drop-zone__icon--beam {
  color: var(--color-orange) !important;
}

/* ============ BEAM RECEIVE ============ */
.beam-recv-info {
  padding: var(--space-5) var(--space-4);
  text-align: center;
}

.br-status {
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.br-detail {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
  font-variant-numeric: tabular-nums;
}

.br-file-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-lg);
  width: 100%;
  margin-bottom: var(--space-5);
}

.br-file-info__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(175, 82, 222, 0.12);
  color: var(--color-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.br-file-info__text {
  flex: 1;
  min-width: 0;
  text-align: left;
}

.br-file-info__name {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.br-file-info__size {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

/* ============ RESPONSIVE ============ */
@media (min-width: 768px) {
  .home-actions--row { max-width: 420px; }
  .code-digits span { width: 60px; height: 76px; font-size: 38px; }
  .code-digit-input { width: 56px; height: 70px; font-size: 34px; }
  .beam-qr-wrapper { max-width: 400px; }
  .beam-qr-container { max-width: 380px; }
}

/* ============ DARK MODE ============ */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:         #000000;
    --color-surface:    rgba(44, 44, 46, 0.72);
    --color-surface-hover: rgba(58, 58, 60, 0.8);
    --color-surface-solid: #1C1C1E;
    --color-text-primary:   #F5F5F7;
    --color-text-secondary: #98989D;
    --color-text-tertiary:  #636366;
    --color-separator:  rgba(84, 84, 88, 0.36);
    --color-overlay:    rgba(255, 255, 255, 0.08);
    --glass-border: 1px solid rgba(255, 255, 255, 0.08);
    --glass-shadow: \
      0 0 0 0.5px rgba(255, 255, 255, 0.04),\
      0 2px 8px rgba(0, 0, 0, 0.2),\
      0 8px 24px rgba(0, 0, 0, 0.3),\
      0 24px 48px rgba(0, 0, 0, 0.2);
    --glass-shadow-elevated: \
      0 0 0 0.5px rgba(255, 255, 255, 0.06),\
      0 4px 12px rgba(0, 0, 0, 0.3),\
      0 16px 40px rgba(0, 0, 0, 0.4),\
      0 32px 64px rgba(0, 0, 0, 0.3);
  }
  .drop-zone { background: rgba(44, 44, 46, 0.4); }
  .drop-zone.drag-over { background: rgba(0, 122, 255, 0.12); }
  .qr-container { background: #2C2C2E; }
  .received-item { background: rgba(44, 44, 46, 0.5); border-color: rgba(255, 255, 255, 0.06); }
  .toast { background: var(--color-surface-solid); }
  .bg-orb { opacity: 0.3; }
  .code-digits span { background: rgba(255, 255, 255, 0.06); }
  .code-digit-input { background: rgba(255, 255, 255, 0.06); }
  .code-digit-input.filled { background: rgba(0, 122, 255, 0.1); }
  .beam-qr-wrapper { background: #1C1C1E; }
  .br-file-info { background: rgba(44, 44, 46, 0.5); border-color: rgba(255, 255, 255, 0.06); }
}

/* ============ UTILITY ============ */
.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;
}