:root {
  --bg: #f2f2f7;
  --card: #ffffff;
  --text: #1d1d1f;
  --secondary: #86868b;
  --tertiary: #aeaeb2;
  --primary: #007aff;
  --primary-hover: #0066d6;
  --primary-active: #0055b3;
  --separator: rgba(60, 60, 67, 0.12);
  --fill: #f2f2f7;
  --fill-secondary: #e5e5ea;
  --danger: #ff3b30;
  --danger-hover: #e0352b;
  --success-bg: #e8f8ed;
  --success-text: #248a3d;
  --error-bg: #ffebee;
  --error-text: #d70015;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

* { box-sizing: border-box; -webkit-font-smoothing: antialiased; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "PingFang SC", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.47059;
  font-size: 17px;
  letter-spacing: -0.022em;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.panel-form,
.panel-list {
  margin-bottom: 0;
}

.panel-list {
  display: flex;
  flex-direction: column;
  min-height: 520px;
}

.record-count {
  font-size: 13px;
  color: var(--secondary);
  font-weight: 500;
}

/* ── Auth ── */
.auth-box {
  max-width: 400px;
  margin: 12vh auto 0;
  padding: 0 4px;
}

.auth-box h1 {
  margin: 0 0 6px;
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.04em;
  text-align: center;
}

.auth-box .subtitle {
  color: var(--secondary);
  margin: 0 0 32px;
  font-size: 17px;
  text-align: center;
}

.auth-box form {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 4px 16px 16px;
  box-shadow: var(--shadow);
}

.auth-box button[type="submit"] {
  margin-top: 8px;
}

.register-fields label {
  display: block;
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--secondary);
}

.code-row {
  display: flex;
  gap: 10px;
  margin-top: 6px;
}

.code-row input {
  flex: 1;
  min-width: 0;
}

.btn-send-code {
  flex-shrink: 0;
  width: auto;
  padding: 11px 14px;
  background: var(--fill-secondary);
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  white-space: nowrap;
}

.btn-send-code:hover:not(:disabled) {
  background: #d1d1d6;
}

.btn-send-code:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── Topbar ── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  background: rgba(242, 242, 247, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 0.5px solid var(--separator);
}

.topbar h1 {
  font-size: 20px;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.024em;
}

.user-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: var(--secondary);
}

/* ── Panels ── */
.panel {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.panel h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.024em;
}

/* ── Form ── */
.grid-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.grid-form .full { grid-column: 1 / -1; }

.grid-form > label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--secondary);
  letter-spacing: -0.008em;
  margin: 0;
}

input:not([type="checkbox"]), select, textarea {
  width: 100%;
  padding: 11px 14px;
  border: none;
  border-radius: 10px;
  font-size: 17px;
  font-family: inherit;
  color: var(--text);
  background: var(--fill);
  transition: background 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance: none;
}

input:focus:not([type="checkbox"]), select:focus, textarea:focus {
  outline: none;
  background: var(--card);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.25);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2386868b' d='M1.41 0L6 4.58 10.59 0 12 1.41l-6 6-6-6z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

textarea { resize: vertical; min-height: 72px; }

.fieldset {
  grid-column: 1 / -1;
  border: none;
  margin: 0;
  padding: 16px;
  background: var(--fill);
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
}

.fieldset legend {
  grid-column: 1 / -1;
  padding: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--secondary);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 2px;
}

.fieldset label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--secondary);
  margin: 0;
}

.fieldset input:not([type="checkbox"]) {
  background: var(--card);
}

.reminder-preview {
  grid-column: 1 / -1;
  margin: 0;
  padding: 10px 12px;
  font-size: 13px;
  color: var(--secondary);
  line-height: 1.4;
  background: var(--card);
  border-radius: 8px;
}

.reminder-preview.off {
  color: var(--tertiary);
}

.reminder-fields {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
  transition: opacity 0.2s;
}

.reminder-fields.disabled {
  opacity: 0.45;
  pointer-events: none;
}

.checkbox {
  grid-column: 1 / -1;
  flex-direction: row !important;
  align-items: center;
  gap: 10px !important;
  font-size: 17px !important;
  color: var(--text) !important;
  font-weight: 400 !important;
  cursor: pointer;
}

.checkbox input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin: 0;
  padding: 0;
  accent-color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
}

/* ── Time picker ── */
.time-label {
  grid-column: span 1;
}

.time-row {
  display: flex;
  align-items: center;
  gap: 20px;
}

.time-unit {
  display: flex;
  align-items: center;
  gap: 8px;
}

.time-unit input {
  width: 56px;
  margin: 0;
  padding: 11px 8px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  background: var(--card);
}

.time-unit span {
  font-size: 17px;
  color: var(--text);
  line-height: 1;
  flex-shrink: 0;
  user-select: none;
}

.hint {
  grid-column: 1 / -1;
  font-size: 13px;
  color: var(--tertiary);
  margin: 0;
  line-height: 1.4;
}

/* ── Buttons ── */
button {
  border: none;
  border-radius: 12px;
  font-family: inherit;
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, opacity 0.15s;
}

button:active { transform: scale(0.98); }

button[type="submit"],
.grid-form > button.full {
  width: 100%;
  padding: 14px;
  background: var(--primary);
  color: #fff;
  letter-spacing: -0.022em;
}

button[type="submit"]:hover,
.grid-form > button.full:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  padding: 7px 14px;
  background: var(--fill-secondary);
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  border-radius: 980px;
}

.btn-secondary:hover { background: #d1d1d6; }

/* ── Event list ── */
.event-list {
  display: flex;
  flex-direction: column;
  flex: 1;
  border-radius: var(--radius);
  overflow: hidden;
  overflow-y: auto;
  background: var(--fill);
  max-height: calc(100vh - 240px);
  min-height: 200px;
}

.empty-hint {
  margin: 0;
  padding: 32px 16px;
  text-align: center;
  font-size: 15px;
  color: var(--tertiary);
  background: var(--fill);
  border-radius: var(--radius);
}

.event-card {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--card);
  border-bottom: 0.5px solid var(--separator);
}

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

.event-countdown {
  font-size: 15px;
  font-weight: 500;
  color: var(--primary);
  margin: 2px 0 6px;
  letter-spacing: -0.01em;
}

.event-card:first-child { border-radius: var(--radius) var(--radius) 0 0; }
.event-card:last-child {
  border-bottom: none;
  border-radius: 0 0 var(--radius) var(--radius);
}
.event-card:only-child { border-radius: var(--radius); }

.event-card h3 {
  margin: 0 0 3px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.022em;
}

.event-meta {
  font-size: 13px;
  color: var(--secondary);
  line-height: 1.4;
}

.event-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.event-actions button {
  padding: 6px 14px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 980px;
}

.btn-danger {
  background: rgba(255, 59, 48, 0.12);
  color: var(--danger);
}

.btn-danger:hover {
  background: rgba(255, 59, 48, 0.2);
}

/* ── Pagination ── */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: auto;
  padding-top: 16px;
}

.page-info {
  font-size: 13px;
  color: var(--secondary);
  font-variant-numeric: tabular-nums;
  min-width: 88px;
  text-align: center;
}

.page-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.page-btn:disabled:active {
  transform: none;
}

/* ── Alert ── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 15px;
  font-weight: 500;
}

.alert.error {
  background: var(--error-bg);
  color: var(--error-text);
}

.alert.success {
  background: var(--success-bg);
  color: var(--success-text);
}

.hidden { display: none !important; }

.switch-mode {
  text-align: center;
  margin-top: 24px;
  font-size: 15px;
  color: var(--secondary);
}

.switch-mode a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.switch-mode a:hover { text-decoration: underline; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .panel-list { min-height: auto; }
  .event-list { max-height: none; }
}

@media (max-width: 640px) {
  .grid-form { grid-template-columns: 1fr; }
  .time-label { grid-column: 1 / -1; }
  .event-card { flex-direction: column; align-items: flex-start; }
  .event-actions { width: 100%; justify-content: flex-end; }
}