/* One UI 8.5 UI Design System */
:root {
  --bg-color: #000000;         /* Pure AMOLED Black background */
  --panel-bg: #1c1c1e;         /* Rounded group card background */
  --card-bg: #2c2c2e;          /* Individual inner card background */
  --card-border: transparent;  /* Borderless design matching screenshots */
  --text-primary: #f5f6fa;
  --text-secondary: #9ea2b5;
  --text-muted: #5f6377;
  --accent-color: #0381fe;      /* Samsung core blue */
  --accent-light: rgba(3, 129, 254, 0.16);
  --danger-color: #ff3b30;
  --success-color: #34c759;
  
  --border-radius-squircle: 35%; /* Perfect CSS squircle approximation */
  --border-radius-panel: 28px;   /* Standard One UI card container radius */
  --border-radius-card: 22px;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition-smooth: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-fast: all 0.2s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  outline: none;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-family);
  overflow-x: hidden;
  padding-bottom: 84px; /* Leave space for bottom navigation bar */
  letter-spacing: -0.3px;
  min-height: 100vh;
  user-select: none;
  -webkit-user-select: none;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 5px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 99px;
}

/* --- One UI 8.5 Collapsible Header --- */
.oneui-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 56px 24px 20px 24px;
  background-color: var(--bg-color);
  transition: var(--transition-smooth);
}

.oneui-header.collapsed {
  padding: 14px 24px;
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border-bottom: 1px solid var(--card-border);
}

.header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  transition: var(--transition-smooth);
}

.oneui-header.collapsed .header-inner {
  align-items: flex-start;
}

.header-text-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: var(--transition-smooth);
}

.oneui-header.collapsed .header-text-group {
  align-items: flex-start;
  text-align: left;
}

.header-title {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.8px;
  color: var(--text-primary);
  transition: var(--transition-smooth);
}

.oneui-header.collapsed .header-title {
  font-size: 19px;
  transform: translateY(0);
}

.header-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
  font-weight: 500;
  transition: var(--transition-smooth);
}

.oneui-header.collapsed .header-subtitle {
  opacity: 0;
  transform: translateY(-8px);
  height: 0;
  margin-top: 0;
  overflow: hidden;
}

.mini-status {
  position: absolute;
  right: 0;
  bottom: 4px;
  opacity: 0;
  transform: scale(0.8);
  transition: var(--transition-smooth);
}

.oneui-header.collapsed .mini-status {
  opacity: 1;
  transform: scale(1);
}

.header-search {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  color: var(--text-primary);
  opacity: 0.8;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
}

.header-search:active {
  background-color: rgba(255, 255, 255, 0.08);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.status-indicator.online {
  background-color: var(--success-color);
  box-shadow: 0 0 6px var(--success-color);
}

/* --- Layout & Grid Structure --- */
.oneui-content {
  padding: 0 16px;
  max-width: 600px;
  margin: 0 auto;
  animation: oneuiFadeIn 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes oneuiFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.tab-pane {
  display: none;
}
.tab-pane.active {
  display: block;
}

/* --- Group Cards and Labels --- */
.oneui-card-group {
  margin-bottom: 24px;
  animation: slideUpItem 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.oneui-card-group:nth-child(1) { animation-delay: 0s; }
.oneui-card-group:nth-child(2) { animation-delay: 0.05s; }
.oneui-card-group:nth-child(3) { animation-delay: 0.1s; }

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

.group-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-left: 16px;
  margin-bottom: 8px;
  display: block;
  letter-spacing: 0.2px;
}

.oneui-card {
  background-color: var(--panel-bg);
  border-radius: var(--border-radius-panel);
  padding: 22px;
  margin-bottom: 12px;
  transition: var(--transition-smooth);
}

/* Card split layouts */
.card-split {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.card-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
  margin-top: 3px;
  line-height: 1.4;
}

h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

/* --- Interactive list container (Samsung Settings Style) --- */
.oneui-list-container {
  background-color: var(--panel-bg);
  border-radius: var(--border-radius-panel);
  overflow: hidden;
  padding: 6px 0;
}

.oneui-list-item {
  display: flex;
  align-items: center;
  padding: 14px 20px;
  transition: var(--transition-fast);
}

/* Tactile click animation */
button:active, 
.oneui-list-item:active, 
.oneui-card.interactive-card:active,
.nav-btn:active {
  transform: scale(0.97);
  transition: transform 0.08s cubic-bezier(0.25, 1, 0.5, 1);
}

.item-icon-squircle {
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius-squircle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 16px;
  flex-shrink: 0;
}

.item-body {
  flex: 1;
  min-width: 0;
}

.item-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.item-text {
  display: flex;
  flex-direction: column;
}

.item-input-row {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  width: 100%;
}

.item-input-row input {
  flex: 1;
}

/* Divider offset to match One UI text alignment */
.item-divider {
  height: 1px;
  background-color: rgba(255, 255, 255, 0.04);
  margin: 0 20px 0 72px; /* Starts exactly where the text body starts */
}

/* --- One UI Pill Buttons & Inputs --- */
.oneui-btn-pill {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: 999px; /* Pill shape */
  cursor: pointer;
  transition: var(--transition-smooth);
}

.oneui-btn-pill-small {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.accent-pill {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: #ffffff;
}

.grey-pill {
  background-color: #2c2d3a;
  border-color: #2c2d3a;
}

.oneui-input-field {
  display: flex;
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 4px 6px 4px 16px;
  margin-top: 12px;
  align-items: center;
  transition: var(--transition-smooth);
}

.oneui-input-field:focus-within {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.oneui-input-field input {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 14.5px;
  flex: 1;
  padding: 8px 0;
  outline: none;
}

.oneui-input-btn {
  background-color: var(--accent-color);
  border: none;
  color: #ffffff;
  font-weight: 700;
  font-size: 13px;
  padding: 8px 16px;
  border-radius: 16px;
  cursor: pointer;
}

input[type="text"], input[type="number"], textarea {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  border-radius: 18px;
  padding: 10px 16px;
  font-size: 14.5px;
  outline: none;
}

/* Pair Code View */
.pair-code-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--card-bg);
  border: 1px dashed var(--accent-color);
  border-radius: var(--border-radius-card);
  padding: 18px;
  margin-top: 14px;
  animation: expandSquircle 0.4s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

@keyframes expandSquircle {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.pair-code-text {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 6px;
  color: var(--accent-color);
  text-indent: 6px;
}

.pair-code-timer {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* --- One UI Settings Switch Toggle --- */
.oneui-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.oneui-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #31333f;
  transition: .3s cubic-bezier(0.2, 0.8, 0.2, 1);
  border-radius: 99px;
}

.switch-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: #ffffff;
  transition: .3s cubic-bezier(0.2, 0.8, 0.2, 1);
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

input:checked + .switch-slider {
  background-color: var(--accent-color);
}

input:checked + .switch-slider:before {
  transform: translateX(20px);
}

/* --- Devices status cards --- */
.status-card {
  padding: 16px 20px;
}
.status-left {
  display: flex;
  align-items: center;
  gap: 16px;
}
.status-pulse {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  position: relative;
}
.status-pulse.online {
  background-color: var(--success-color);
}
.status-pulse.online::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: var(--success-color);
  animation: pulseLight 2s infinite ease-in-out;
}

@keyframes pulseLight {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(2.4); opacity: 0; }
}

.status-details h4 {
  font-size: 15.5px;
  font-weight: 700;
}

/* Device Row inside Lists */
.device-row-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--border-radius-squircle);
  background-color: var(--card-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-color);
  margin-right: 14px;
}

/* Info Cards */
.info-card {
  padding: 14px 20px;
}
.info-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  font-size: 13.5px;
  font-weight: 500;
}
.info-label {
  color: var(--text-secondary);
}
.info-value {
  color: var(--text-primary);
  font-weight: 600;
}
.info-divider {
  height: 1px;
  background-color: rgba(255,255,255,0.03);
}

/* --- Samsung Notification Shade Style Feed --- */
.section-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px 12px 12px;
}
.section-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
}
.oneui-text-btn {
  background: none;
  border: none;
  color: var(--accent-color);
  font-weight: 700;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.notif-feed {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Samsung Quick Panel Styled Notification Alert */
.notif-card {
  background-color: var(--panel-bg);
  border-radius: var(--border-radius-card);
  padding: 14px 16px;
  display: flex;
  align-items: flex-start;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  animation: slideUpItem 0.35s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.notif-icon-col {
  margin-right: 14px;
}

.notif-app-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius-squircle);
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-color);
  font-weight: 700;
  font-size: 14px;
}

.notif-content-col {
  flex: 1;
  min-width: 0;
}

.notif-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2px;
}

.notif-app-name {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.notif-time {
  font-size: 11px;
  color: var(--text-muted);
}

.notif-title {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.notif-text {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.4;
  word-break: break-all;
}

.notif-sender {
  font-size: 10px;
  color: var(--accent-color);
  background-color: var(--accent-light);
  padding: 2px 8px;
  border-radius: 6px;
  display: inline-block;
  margin-top: 8px;
  font-weight: 700;
}

/* Empty notifications page state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  text-align: center;
}

.empty-icon-wrap {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background-color: var(--panel-bg);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.empty-state p {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.empty-subtext {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 6px;
  max-width: 260px;
  line-height: 1.4;
}

/* --- Floating Capsule Bottom Navigation Bar (One UI 8.5 Style) --- */
.oneui-nav-bar {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 72px);
  max-width: 500px;
  height: 66px;
  background-color: rgba(18, 18, 24, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border-radius: 33px; /* Capsule shape */
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 0 12px;
  z-index: 999;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: #8e8e93; /* Neutral grey for inactive items */
  cursor: pointer;
  flex: 1;
  height: 100%;
  transition: var(--transition-fast);
  padding: 6px 0;
}

.nav-btn.active {
  color: var(--accent-color);
}

.nav-btn-icon {
  width: 56px;
  height: 30px;
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
  transition: var(--transition-smooth);
}

.nav-btn.active .nav-btn-icon {
  background-color: transparent; /* Remove background indicator pill */
  color: var(--accent-color);
}

.nav-btn-label {
  font-size: 11px;
  font-weight: 600;
  transition: var(--transition-fast);
}

.nav-btn.active .nav-btn-label {
  font-weight: 700;
}

/* --- One UI Bottom Drawer (Sheet Modal) --- */
.oneui-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 10000;
  visibility: hidden;
  transition: visibility 0.4s;
}

.oneui-drawer.open {
  visibility: visible;
}

.drawer-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.oneui-drawer.open .drawer-overlay {
  opacity: 1;
}

.drawer-sheet {
  position: absolute;
  bottom: 0;
  width: 100%;
  background-color: var(--panel-bg);
  border-top-left-radius: var(--border-radius-panel);
  border-top-right-radius: var(--border-radius-panel);
  padding: 10px 24px 44px 24px;
  transform: translate(-50%, 100%);
  transition: transform 0.45s cubic-bezier(0.15, 0.9, 0.25, 1);
  box-shadow: 0 -4px 30px rgba(0,0,0,0.3);
  max-width: 600px;
  left: 50%;
}

.oneui-drawer.open .drawer-sheet {
  transform: translate(-50%, 0);
}

.drawer-pill-handle {
  width: 36px;
  height: 4px;
  background-color: var(--card-border);
  border-radius: 2px;
  margin: 0 auto 16px auto;
}

.drawer-sheet h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 3px;
}

.drawer-subtitle {
  font-size: 12.5px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.drawer-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.drawer-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.drawer-form-group label {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-left: 4px;
}

.drawer-actions {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.drawer-actions button {
  flex: 1;
}

.hidden {
  display: none !important;
}

.online-text {
  color: var(--success-color) !important;
}