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

:root {
  --blue: #0A84FF;
  --blue-pressed: #0070E0;
  --bg: #F2F2F7;
  --surface: #FFFFFF;
  --text-primary: #1C1C1E;
  --text-secondary: #6C6C70;
  --text-tertiary: #AEAEB2;
  --separator: #E5E5EA;
  --destructive: #FF3B30;
  --radius-card: 16px;
  --radius-btn: 14px;
  --radius-row: 12px;
  --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Roboto Mono', 'Menlo', monospace;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  background-color: var(--bg);
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: var(--bg);
  min-height: 100svh;
  padding-bottom: env(safe-area-inset-bottom, 20px);
}

/* ===== App layout ===== */
#app {
  max-width: 430px;
  margin: 0 auto;
}

/* ===== Header ===== */
.app-header {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 16px 20px 0;
  padding-top: calc(16px + env(safe-area-inset-top, 0px));
}

.app-title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--text-primary);
}

.btn-icon {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  transition: background 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.btn-icon:hover {
  background: rgba(10, 132, 255, 0.08);
}

.btn-icon:active {
  background: rgba(10, 132, 255, 0.16);
}

.app-header .btn-icon {
  position: absolute;
  right: 16px;
  top: calc(12px + env(safe-area-inset-top, 0px));
}

/* ===== Main content ===== */
.app-main {
  padding: 16px 16px 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ===== URL input section ===== */
.input-section {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.url-input {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--text-primary);
  background: var(--bg);
  border: 1px solid var(--separator);
  border-radius: 10px;
  padding: 10px 12px;
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}

.url-input:focus {
  border-color: var(--blue);
}

.url-input::placeholder {
  color: var(--text-tertiary);
}

.input-hint {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ===== Action buttons ===== */
.actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-primary {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: var(--blue);
  border: none;
  border-radius: var(--radius-btn);
  padding: 15px 20px;
  width: 100%;
  cursor: pointer;
  transition: background 0.12s, transform 0.08s;
  -webkit-tap-highlight-color: transparent;
  letter-spacing: -0.2px;
}

.btn-primary:hover {
  background: var(--blue-pressed);
}

.btn-primary:active {
  background: var(--blue-pressed);
  transform: scale(0.98);
}

.btn-primary:disabled {
  background: var(--text-tertiary);
  cursor: not-allowed;
  transform: none;
}

.btn-primary.syncing {
  background: var(--blue);
  opacity: 0.7;
}

/* ===== Clock card ===== */
.clock-card {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 24px 20px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.clock-display {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  /* Keep width stable */
  min-width: 10ch;
  text-align: center;
}

.clock-display.synced {
  color: var(--text-primary);
}

.clock-display.idle {
  color: var(--text-tertiary);
}

.clock-stats {
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.4;
  letter-spacing: 0;
}

/* ===== Sites section ===== */
.sites-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Segmented control */
.segmented-control {
  display: flex;
  background: var(--separator);
  border-radius: 10px;
  padding: 2px;
  gap: 2px;
}

.segment-btn {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  flex: 1;
  padding: 7px 12px;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: background 0.15s, color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.segment-btn.active {
  background: var(--surface);
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* Sites list */
.sites-list {
  list-style: none;
  background: var(--surface);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.sites-list li {
  display: flex;
  align-items: center;
}

.site-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  width: 100%;
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--text-primary);
  cursor: pointer;
  text-align: left;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.1s;
  gap: 8px;
}

.site-row:active {
  background: var(--bg);
}

.site-row .site-label {
  flex: 1;
  font-weight: 500;
}

.site-row .site-url {
  font-size: 12px;
  color: var(--text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 140px;
}

.sites-list li + li {
  border-top: 1px solid var(--separator);
}

/* Add site button */
.btn-add-site {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--blue);
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 4px;
  -webkit-tap-highlight-color: transparent;
}

.btn-add-site:hover {
  opacity: 0.7;
}

/* ===== Settings sheet ===== */
.sheet-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 100;
  display: flex;
  align-items: flex-end;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.sheet-overlay[hidden] {
  display: none;
}

.sheet {
  background: var(--surface);
  border-radius: 20px 20px 0 0;
  width: 100%;
  max-width: 430px;
  margin: 0 auto;
  padding-bottom: calc(24px + env(safe-area-inset-bottom, 0px));
  animation: slideUp 0.28s cubic-bezier(0.32, 0.72, 0, 1);
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

.sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--separator);
}

.sheet-header h2 {
  font-size: 17px;
  font-weight: 600;
}

.sheet-body {
  padding: 8px 0;
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  font-size: 15px;
  cursor: pointer;
  border-bottom: 1px solid var(--separator);
  gap: 12px;
}

.setting-row:last-child {
  border-bottom: none;
}

.setting-row span {
  color: var(--text-primary);
  flex: 1;
}

.setting-row select,
.setting-row input[type="time"] {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--text-secondary);
  background: none;
  border: none;
  outline: none;
  text-align: right;
  cursor: pointer;
}

.setting-row input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--blue);
  cursor: pointer;
}

/* ===== Sync status indicator ===== */
.sync-status {
  font-size: 13px;
  text-align: center;
  padding: 4px 0;
  color: var(--text-secondary);
}

.sync-status.error {
  color: var(--destructive);
}

.sync-status.success {
  color: #34C759;
}

/* ===== Spinner ===== */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}

/* ===== Responsive: larger screens ===== */
@media (min-width: 431px) {
  body {
    padding-top: 20px;
  }

  .app-header {
    border-radius: var(--radius-card) var(--radius-card) 0 0;
  }
}