:root {
  color-scheme: light;
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-soft: #f9fafc;
  --surface-raised: #ffffff;
  --text: #18202f;
  --muted: #747d8d;
  --muted-2: #9ca3af;
  --border: #e5e8ef;
  --border-strong: #d9dee8;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-soft: #eff6ff;
  --success: #1a9b62;
  --success-soft: #eaf8f2;
  --warning: #d89018;
  --danger: #e05260;
  --shadow-sm: 0 1px 2px rgba(19, 28, 48, .04), 0 3px 10px rgba(19, 28, 48, .03);
  --shadow-md: 0 12px 34px rgba(23, 31, 49, .09);
  --radius: 14px;
  --subject-1: #2563eb;
  --subject-2: #198acb;
  --subject-3: #ef7b45;
  --subject-4: #22a078;
  --subject-5: #d9609a;
  --subject-6: #bc8527;
  --subject-7: #5c78d5;
  --subject-8: #7a61ae;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #11141b;
  --surface: #191d26;
  --surface-soft: #151922;
  --surface-raised: #202530;
  --text: #f1f3f7;
  --muted: #a3abba;
  --muted-2: #747d8e;
  --border: #2c323e;
  --border-strong: #39404d;
  --accent: #60a5fa;
  --accent-dark: #93c5fd;
  --accent-soft: #172554;
  --success: #45c98d;
  --success-soft: #193a30;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .2);
  --shadow-md: 0 16px 40px rgba(0, 0, 0, .3);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font: inherit;
}

button {
  color: inherit;
}

button,
select {
  cursor: pointer;
}

svg {
  display: block;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  height: 68px;
  padding: 0 30px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -.45px;
  width: fit-content;
}

.brand > span:last-child span {
  color: var(--accent);
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: #fff;
  border-radius: 10px;
  background: linear-gradient(145deg, #3b82f6, #2563eb);
  box-shadow: 0 7px 16px rgba(37, 99, 235, .22);
}

.brand-mark svg {
  width: 25px;
  height: 25px;
}

.topbar-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 14px;
}

.autosave-status {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 550;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--success) 12%, transparent);
}

.icon-btn {
  width: 36px;
  height: 36px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: .2s ease;
}

.icon-btn:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.icon-btn svg {
  width: 18px;
  height: 18px;
}

.moon-icon,
[data-theme="dark"] .sun-icon {
  display: none;
}

[data-theme="dark"] .moon-icon {
  display: block;
}

.workspace {
  min-height: calc(100vh - 68px);
  display: grid;
  grid-template-columns: minmax(390px, 430px) minmax(700px, 1fr);
}

.setup-panel {
  padding: 28px 28px 38px;
  background: var(--surface);
  border-right: 1px solid var(--border);
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 26px;
}

.eyebrow {
  display: block;
  margin-bottom: 7px;
  color: var(--accent);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.45px;
}

.panel-heading h1,
.preview-top h2 {
  margin: 0;
  letter-spacing: -.55px;
}

.panel-heading h1 {
  font-size: 23px;
}

.panel-heading p,
.preview-top p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.step-badge {
  padding: 6px 9px;
  flex: 0 0 auto;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 23%, var(--border));
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: 10px;
  font-weight: 700;
}

.form-section {
  padding: 22px 0;
  border-top: 1px solid var(--border);
}

.section-label,
.section-label-row {
  display: flex;
  align-items: center;
}

.section-label {
  gap: 9px;
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 750;
}

.section-label-row {
  justify-content: space-between;
  gap: 12px;
}

.section-label-row .section-label {
  margin-bottom: 14px;
}

.section-icon {
  width: 25px;
  height: 25px;
  display: grid;
  place-items: center;
  color: var(--accent);
  border-radius: 7px;
  background: var(--accent-soft);
}

.section-icon svg {
  width: 15px;
  height: 15px;
}

.field-grid {
  display: grid;
  gap: 10px;
}

.field-grid.two-col {
  grid-template-columns: 1.3fr 1fr;
}

.field-grid.three-col {
  grid-template-columns: 1fr 1fr 1fr;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.field > span {
  color: var(--muted);
  font-size: 10px;
  font-weight: 650;
}

.field input,
.field select,
.subject-row input,
.subject-row select {
  width: 100%;
  height: 38px;
  padding: 0 11px;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  outline: 0;
  background: var(--surface);
  font-size: 12px;
  transition: border-color .16s, box-shadow .16s;
}

.field input:focus,
.field select:focus,
.subject-row input:focus,
.subject-row select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}

.field select,
.subject-row select {
  appearance: none;
  padding-right: 28px;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 14px) 16px, calc(100% - 10px) 16px;
  background-size: 4px 4px, 4px 4px;
  background-repeat: no-repeat;
}

.lunch-field {
  margin-top: 10px;
}

.output-heading-field {
  margin-top: 10px;
}

.output-heading-field > span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.output-heading-field em {
  padding: 2px 5px;
  color: var(--accent);
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: 7px;
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: .35px;
}

.output-heading-field small {
  color: var(--muted-2);
  font-size: 8px;
  line-height: 1.4;
}

.lunch-field small {
  color: var(--muted-2);
  font-size: 9px;
}

.time-editor-toggle {
  width: 100%;
  min-height: 52px;
  margin-top: 12px;
  padding: 9px 11px;
  display: grid;
  grid-template-columns: 31px 1fr 18px;
  align-items: center;
  gap: 9px;
  color: var(--text);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, var(--border));
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent-soft) 48%, var(--surface));
  text-align: left;
  transition: .16s ease;
}

.time-editor-toggle:hover {
  border-color: color-mix(in srgb, var(--accent) 42%, var(--border));
}

.time-editor-toggle > span:nth-child(2) {
  min-width: 0;
}

.time-editor-toggle strong,
.time-editor-toggle small {
  display: block;
}

.time-editor-toggle strong {
  font-size: 10px;
}

.time-editor-toggle small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 8px;
}

.time-editor-toggle-icon {
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  color: var(--accent);
  border-radius: 8px;
  background: var(--accent-soft);
}

.time-editor-toggle-icon svg,
.time-editor-chevron {
  width: 16px;
  height: 16px;
}

.time-editor-chevron {
  color: var(--muted);
  transition: transform .2s ease;
}

.time-editor-toggle[aria-expanded="true"] .time-editor-chevron {
  transform: rotate(180deg);
}

.time-editor {
  margin-top: 8px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-soft);
}

.time-editor-head {
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.time-editor-head strong,
.time-editor-head span {
  display: block;
}

.time-editor-head strong {
  font-size: 10px;
}

.time-editor-head span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 8px;
}

.period-time-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.period-time-row,
.lunch-time-editor {
  min-height: 36px;
  display: grid;
  grid-template-columns: 62px 1fr 18px 1fr;
  align-items: center;
  gap: 5px;
}

.period-time-row {
  padding: 3px 7px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.period-time-row > span:first-child {
  color: var(--text);
  font-size: 9px;
  font-weight: 700;
}

.period-time-row input,
.lunch-time-editor input {
  width: 100%;
  min-width: 0;
  height: 28px;
  padding: 0 5px;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  outline: 0;
  background: var(--surface);
  font-size: 9px;
}

.period-time-row input:focus,
.lunch-time-editor input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 12%, transparent);
}

.time-separator {
  color: var(--muted-2);
  font-size: 8px;
  text-align: center;
}

.lunch-time-editor {
  margin-top: 8px;
  padding: 5px 7px;
  color: var(--warning);
  border: 1px solid color-mix(in srgb, var(--warning) 25%, var(--border));
  border-radius: 8px;
  background: color-mix(in srgb, var(--warning) 7%, var(--surface));
}

.lunch-time-editor[hidden] {
  display: none;
}

.lunch-time-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 9px;
  font-weight: 750;
}

.lunch-time-label svg {
  width: 13px;
  height: 13px;
}

.field-hint {
  color: var(--muted-2);
  font-size: 10px;
}

.day-picker {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 7px;
}

.day-chip {
  min-width: 0;
  height: 49px;
  padding: 5px 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-soft);
  transition: .16s ease;
}

.day-chip:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}

.day-chip span {
  font-size: 12px;
  font-weight: 750;
}

.day-chip small {
  font-size: 8px;
}

.day-chip.is-selected {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 8%, transparent);
}

.text-btn {
  padding: 0;
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--accent);
  border: 0;
  background: none;
  font-size: 10px;
  font-weight: 750;
}

.text-btn svg {
  width: 14px;
  height: 14px;
}

.subject-list-head {
  padding: 0 27px 7px 19px;
  display: grid;
  grid-template-columns: minmax(110px, 1fr) 55px 74px 18px;
  gap: 7px;
  color: var(--muted-2);
  font-size: 8px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.subject-list {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.subject-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(110px, 1fr) 55px 74px 18px;
  align-items: center;
  gap: 7px;
}

.subject-color {
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 24px;
  border-radius: 2px;
  background: var(--row-color);
}

.subject-name-group {
  min-width: 0;
  padding-left: 17px;
}

.subject-row .subject-name {
  height: 26px;
  padding: 1px 8px 0;
  border-radius: 7px 7px 0 0;
  border-bottom: 0;
  font-size: 11px;
  font-weight: 700;
}

.subject-row .teacher-name {
  height: 23px;
  padding: 0 8px 2px;
  color: var(--muted);
  border-radius: 0 0 7px 7px;
  font-size: 9px;
}

.subject-row .weekly-count,
.subject-row .subject-type {
  height: 38px;
  padding-left: 8px;
  padding-right: 5px;
  text-align: center;
  font-size: 10px;
}

.subject-row .subject-type {
  padding-right: 22px;
  text-align: left;
  background-position: calc(100% - 12px) 16px, calc(100% - 8px) 16px;
}

.remove-subject {
  width: 18px;
  height: 30px;
  padding: 0;
  display: grid;
  place-items: center;
  color: var(--muted-2);
  border: 0;
  background: none;
  opacity: .45;
  transition: .15s;
}

.remove-subject:hover {
  color: var(--danger);
  opacity: 1;
}

.remove-subject svg {
  width: 14px;
  height: 14px;
}

.subject-total {
  margin-top: 10px;
  padding: 9px 11px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--success);
  border-radius: 8px;
  background: var(--success-soft);
  font-size: 9px;
  font-weight: 650;
}

.subject-total i {
  width: 15px;
  height: 15px;
  margin-right: 5px;
  display: inline-grid;
  place-items: center;
  color: #fff;
  border-radius: 50%;
  background: var(--success);
  font-size: 9px;
  font-style: normal;
}

.subject-total.is-warning {
  color: var(--warning);
  background: color-mix(in srgb, var(--warning) 10%, var(--surface));
}

.subject-total.is-warning i {
  background: var(--warning);
}

.generate-btn {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  color: white;
  border: 0;
  border-radius: 11px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  box-shadow: 0 10px 22px rgba(37, 99, 235, .23);
  font-weight: 750;
  font-size: 12px;
  transition: .2s ease;
}

.generate-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 13px 26px rgba(37, 99, 235, .3);
}

.generate-btn:active {
  transform: translateY(0);
}

.generate-btn .sparkle-icon,
.generate-btn .sparkle-icon svg {
  width: 19px;
  height: 19px;
}

.generate-btn kbd {
  margin-left: auto;
  padding: 3px 6px;
  color: rgba(255, 255, 255, .82);
  border: 1px solid rgba(255, 255, 255, .23);
  border-radius: 5px;
  background: rgba(255, 255, 255, .1);
  font-family: inherit;
  font-size: 9px;
  font-weight: 600;
}

.preview-panel {
  min-width: 0;
  padding: 34px clamp(24px, 3vw, 48px) 0;
  display: flex;
  flex-direction: column;
}

.ai-chat-panel {
  width: 100%;
  min-height: calc(100vh - 102px);
  display: none;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 16px 16px 0 0;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.preview-panel.is-chat-mode {
  padding-bottom: 0;
}

.preview-panel.is-chat-mode > :not(.ai-chat-panel) {
  display: none;
}

.preview-panel.is-chat-mode .ai-chat-panel {
  display: flex;
}

.ai-chat-header {
  min-height: 78px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent-soft) 62%, var(--surface)), var(--surface));
}

.ai-chat-title {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.ai-avatar {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  color: #fff;
  border-radius: 13px;
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  box-shadow: 0 8px 18px rgba(37, 99, 235, .24);
}

.ai-avatar svg {
  width: 22px;
  height: 22px;
}

.ai-title-line {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ai-title-line h2 {
  margin: 0;
  color: var(--text);
  font-size: 17px;
  letter-spacing: -.35px;
}

.ai-chat-title p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 9px;
}

.ai-live-badge {
  padding: 4px 7px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, var(--border));
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: 7px;
  font-weight: 750;
}

.ai-live-badge i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}

.ai-close-btn {
  flex: 0 0 auto;
}

.ai-settings-bar {
  min-height: 39px;
  padding: 7px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-soft);
}

.ai-connection-status {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 650;
}

.ai-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--warning);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--warning) 11%, transparent);
}

.ai-status-dot.is-ready {
  background: var(--success);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--success) 11%, transparent);
}

.ai-settings-toggle svg {
  width: 13px;
  height: 13px;
}

.ai-settings {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--accent-soft) 35%, var(--surface));
}

.ai-settings[hidden] {
  display: none;
}

.ai-settings-grid {
  display: grid;
  grid-template-columns: minmax(220px, 420px);
  gap: 10px;
}

.ai-settings .field small {
  color: var(--muted-2);
  font-size: 8px;
  line-height: 1.4;
}

.ai-system-prompt-field {
  margin-top: 10px;
}

.ai-system-prompt-field > span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ai-system-prompt-field em {
  padding: 2px 5px;
  color: var(--accent);
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: 7px;
  font-style: normal;
  letter-spacing: .3px;
  text-transform: uppercase;
}

.ai-settings textarea {
  width: 100%;
  min-height: 76px;
  padding: 9px 10px;
  resize: vertical;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  outline: 0;
  background: var(--surface);
  font-size: 9px;
  line-height: 1.55;
}

.ai-settings textarea:focus,
.ai-composer textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}

.ai-chat-messages {
  min-height: 330px;
  padding: 22px max(18px, 8%);
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
  background:
    radial-gradient(circle at 12% 8%, color-mix(in srgb, var(--accent) 5%, transparent), transparent 24%),
    var(--surface);
  scrollbar-color: var(--border-strong) transparent;
}

.ai-message {
  max-width: min(82%, 680px);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  animation: message-in .2s ease both;
}

.ai-message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.ai-message-avatar {
  width: 27px;
  height: 27px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  color: var(--accent);
  border-radius: 8px;
  background: var(--accent-soft);
}

.ai-message.user .ai-message-avatar {
  color: #fff;
  background: var(--accent);
}

.ai-message-avatar svg {
  width: 14px;
  height: 14px;
}

.ai-message-bubble {
  min-width: 0;
  padding: 10px 12px;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px 12px 12px 12px;
  background: var(--surface-soft);
  font-size: 10px;
  line-height: 1.55;
}

.ai-message.user .ai-message-bubble {
  color: #fff;
  border-color: var(--accent);
  border-radius: 12px 4px 12px 12px;
  background: var(--accent);
}

.ai-message-bubble p {
  margin: 0;
  white-space: pre-wrap;
}

.ai-message-meta {
  margin-top: 6px;
  display: block;
  color: var(--muted-2);
  font-size: 7px;
}

.ai-message.user .ai-message-meta {
  color: rgba(255, 255, 255, .7);
}

.ai-result-summary {
  margin-top: 9px;
  padding-top: 9px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-top: 1px solid var(--border);
}

.ai-result-summary span {
  color: var(--success);
  font-size: 8px;
  font-weight: 700;
}

.ai-result-summary button {
  height: 29px;
  padding: 0 10px;
  color: #fff;
  border: 0;
  border-radius: 7px;
  background: var(--accent);
  font-size: 8px;
  font-weight: 700;
}

.ai-thinking {
  display: flex;
  align-items: center;
  gap: 4px;
}

.ai-thinking i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  animation: thinking 1s ease-in-out infinite;
}

.ai-thinking i:nth-child(2) {
  animation-delay: .14s;
}

.ai-thinking i:nth-child(3) {
  animation-delay: .28s;
}

@keyframes thinking {
  0%, 60%, 100% { opacity: .3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-3px); }
}

@keyframes message-in {
  from { opacity: 0; transform: translateY(5px); }
}

.ai-prompt-suggestions {
  padding: 8px 16px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.ai-prompt-suggestions button {
  padding: 6px 9px;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, var(--border));
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: 8px;
  font-weight: 650;
}

.ai-prompt-suggestions button:hover {
  border-color: var(--accent);
}

.ai-composer {
  margin: 9px 16px 0;
  padding: 9px;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 7px 22px rgba(22, 31, 49, .07);
}

.ai-composer:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 10%, transparent), 0 7px 22px rgba(22, 31, 49, .07);
}

.ai-composer textarea {
  width: 100%;
  min-height: 58px;
  max-height: 150px;
  padding: 4px 5px;
  resize: vertical;
  color: var(--text);
  border: 0;
  outline: 0;
  background: transparent;
  font-size: 10px;
  line-height: 1.5;
}

.ai-composer textarea:focus {
  box-shadow: none;
}

.ai-composer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.ai-composer-footer > span {
  color: var(--muted-2);
  font-size: 7px;
}

.ai-composer-footer kbd {
  padding: 2px 4px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface-soft);
  font-family: inherit;
}

.ai-send-btn {
  height: 34px;
  padding: 0 13px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #fff;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  box-shadow: 0 6px 14px rgba(37, 99, 235, .2);
  font-size: 9px;
  font-weight: 750;
}

.ai-send-btn:hover:not(:disabled) {
  background: var(--accent-dark);
}

.ai-send-btn:disabled {
  cursor: wait;
  opacity: .65;
}

.ai-send-btn svg {
  width: 14px;
  height: 14px;
}

.ai-privacy-note {
  margin: 7px 16px 11px;
  color: var(--muted-2);
  font-size: 7px;
  line-height: 1.4;
  text-align: center;
}

.preview-top {
  margin-bottom: 22px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.preview-title-line {
  display: flex;
  align-items: center;
  gap: 10px;
}

.preview-top h2 {
  font-size: 22px;
}

.ready-badge {
  padding: 5px 8px;
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--success);
  border-radius: 999px;
  background: var(--success-soft);
  font-size: 9px;
  font-weight: 700;
}

.ready-badge span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--success);
}

.preview-actions {
  display: flex;
  gap: 7px;
}

.secondary-btn,
.export-btn {
  height: 35px;
  padding: 0 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--muted);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface);
  font-size: 10px;
  font-weight: 650;
  transition: .16s ease;
}

.secondary-btn:hover:not(:disabled),
.export-btn:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
  transform: translateY(-1px);
}

.secondary-btn:disabled {
  cursor: not-allowed;
  opacity: .45;
}

.secondary-btn svg,
.export-btn svg {
  width: 15px;
  height: 15px;
}

.secondary-btn.accent-outline,
.secondary-btn.is-active {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 36%, var(--border));
  background: var(--accent-soft);
}

.timetable-card {
  position: relative;
  min-height: 300px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.output-heading-preview {
  padding: 20px 18px 18px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  font-size: clamp(18px, 2vw, 25px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.45px;
  text-align: center;
}

.output-heading-preview[hidden] {
  display: none;
}

.table-toolbar {
  min-height: 48px;
  padding: 11px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--border);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.legend-item {
  padding: 4px 7px;
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  border-radius: 5px;
  background: var(--surface-soft);
  font-size: 8px;
  font-weight: 650;
}

.legend-item i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--legend-color);
}

.edit-hint {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--muted-2);
  font-size: 8px;
  white-space: nowrap;
}

.edit-hint svg {
  width: 13px;
  height: 13px;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  scrollbar-color: var(--border-strong) transparent;
}

#timetableTable {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  table-layout: fixed;
}

#timetableTable th,
#timetableTable td {
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

#timetableTable th:last-child,
#timetableTable td:last-child {
  border-right: 0;
}

#timetableTable tbody tr:last-child td,
#timetableTable tbody tr:last-child th {
  border-bottom: 0;
}

#timetableTable thead th {
  height: 47px;
  padding: 6px 4px;
  color: var(--muted);
  background: var(--surface-soft);
  font-size: 8px;
  font-weight: 750;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: .3px;
}

#timetableTable thead th span {
  margin-top: 3px;
  display: block;
  color: var(--muted-2);
  font-size: 7px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

#timetableTable .day-head {
  width: 76px;
}

#timetableTable .lunch-head,
#timetableTable .lunch-cell {
  width: 54px;
  color: var(--warning);
  background: color-mix(in srgb, var(--warning) 7%, var(--surface));
}

#timetableTable .lunch-head {
  padding: 4px 2px;
}

#timetableTable .lunch-head span {
  margin: 0;
  font-size: 6px;
  letter-spacing: .5px;
  text-transform: uppercase;
}

#timetableTable .lunch-head small {
  margin-top: 3px;
  display: block;
  color: var(--warning);
  font-size: 5px;
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: 0;
}

#timetableTable tbody th {
  padding: 0 8px 0 12px;
  color: var(--text);
  background: var(--surface-soft);
  font-size: 9px;
  font-weight: 750;
  text-align: left;
}

#timetableTable tbody td {
  height: 69px;
  padding: 5px;
  background: var(--surface);
  vertical-align: middle;
}

.period-card {
  height: 55px;
  padding: 7px 5px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  border: 1px solid color-mix(in srgb, var(--cell-color) 22%, transparent);
  border-radius: 7px;
  background: color-mix(in srgb, var(--cell-color) 8%, var(--surface));
  text-align: center;
  transition: .16s ease;
}

.period-card strong {
  width: 100%;
  overflow: hidden;
  color: color-mix(in srgb, var(--cell-color) 83%, var(--text));
  font-size: 9px;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.period-card span {
  width: 100%;
  overflow: hidden;
  color: var(--muted);
  font-size: 7px;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.period-card.is-free {
  --cell-color: var(--muted-2) !important;
  border-style: dashed;
  opacity: .72;
}

.period-card select {
  width: 100%;
  height: 30px;
  padding: 0 17px 0 5px;
  color: var(--text);
  border: 1px solid color-mix(in srgb, var(--cell-color) 40%, var(--border));
  border-radius: 5px;
  outline: 0;
  background-color: var(--surface);
  font-size: 8px;
}

.period-card.is-editable {
  border-color: var(--cell-color);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--cell-color) 8%, transparent);
}

.lunch-cell {
  padding: 0 !important;
}

.lunch-cell div {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
}

.lunch-cell svg {
  width: 14px;
  height: 14px;
}

.loading-state {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(5px);
  opacity: 0;
  visibility: hidden;
  transition: .2s;
}

.loading-state.is-visible {
  opacity: 1;
  visibility: visible;
}

.loading-state strong {
  margin-top: 14px;
  font-size: 13px;
}

.loading-state p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 10px;
}

.loader-orbit {
  width: 38px;
  height: 38px;
  padding: 4px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent, var(--accent));
  animation: spin .8s linear infinite;
}

.loader-orbit::before {
  content: "";
  width: 30px;
  height: 30px;
  display: block;
  border-radius: 50%;
  background: var(--surface);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.schedule-insights {
  margin: 14px 0 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.insight-card {
  min-width: 0;
  padding: 13px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}

.insight-icon {
  width: 31px;
  height: 31px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 8px;
}

.insight-icon svg {
  width: 17px;
  height: 17px;
}

.insight-icon.success {
  color: var(--success);
  background: var(--success-soft);
}

.insight-icon.purple {
  color: var(--accent);
  background: var(--accent-soft);
}

.insight-icon.amber {
  color: var(--warning);
  background: color-mix(in srgb, var(--warning) 10%, var(--surface));
}

.insight-card div {
  min-width: 0;
}

.insight-card strong,
.insight-card span {
  display: block;
}

.insight-card strong {
  margin-bottom: 3px;
  font-size: 10px;
}

.insight-card span {
  overflow: hidden;
  color: var(--muted);
  font-size: 8px;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.export-bar {
  min-height: 68px;
  margin: auto calc(clamp(24px, 3vw, 48px) * -1) 0;
  padding: 12px clamp(24px, 3vw, 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.export-copy strong,
.export-copy span {
  display: block;
}

.export-copy strong {
  margin-bottom: 3px;
  font-size: 11px;
}

.export-copy span {
  color: var(--muted);
  font-size: 9px;
}

.export-actions {
  display: flex;
  gap: 7px;
}

.export-btn {
  box-shadow: var(--shadow-sm);
}

.export-btn.primary {
  color: #fff;
  border-color: var(--accent);
  background: var(--accent);
}

.toast-region {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 9px;
  pointer-events: none;
}

.toast {
  min-width: 260px;
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-raised);
  box-shadow: var(--shadow-md);
  animation: toast-in .25s ease both;
  pointer-events: auto;
}

.toast.is-leaving {
  animation: toast-out .2s ease both;
}

.toast i {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  color: #fff;
  border-radius: 50%;
  background: var(--success);
  font-size: 11px;
  font-style: normal;
}

.toast.error i {
  background: var(--danger);
}

.toast strong,
.toast span {
  display: block;
}

.toast strong {
  font-size: 10px;
}

.toast span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 8px;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px) scale(.98); }
}

@keyframes toast-out {
  to { opacity: 0; transform: translateY(5px) scale(.98); }
}

@media (max-width: 1150px) {
  .workspace {
    grid-template-columns: 360px minmax(620px, 1fr);
  }

  .setup-panel {
    padding-inline: 22px;
  }

  .secondary-btn span {
    display: none;
  }

  .secondary-btn {
    width: 35px;
    padding: 0;
  }
}

@media (max-width: 900px) {
  .topbar {
    padding: 0 18px;
  }

  .workspace {
    display: block;
  }

  .setup-panel {
    padding: 26px max(20px, 5vw) 28px;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .preview-panel {
    padding: 28px max(18px, 4vw) 0;
  }

  .export-bar {
    margin-inline: calc(max(18px, 4vw) * -1);
    padding-inline: max(18px, 4vw);
  }
}

@media (max-width: 640px) {
  .topbar {
    height: 60px;
  }

  .autosave-copy {
    display: none;
  }

  .workspace {
    min-height: calc(100vh - 60px);
  }

  .panel-heading,
  .preview-top {
    align-items: flex-start;
  }

  .preview-top {
    flex-direction: column;
  }

  .preview-actions {
    width: 100%;
  }

  .ai-chat-panel {
    min-height: calc(100vh - 88px);
    border-radius: 12px 12px 0 0;
  }

  .ai-chat-header {
    align-items: flex-start;
  }

  .ai-chat-title p,
  .ai-live-badge {
    display: none;
  }

  .ai-close-btn {
    width: 35px;
    flex: 0 0 35px;
  }

  .ai-close-btn span {
    display: none;
  }

  .ai-settings-grid {
    grid-template-columns: 1fr;
  }

  .ai-chat-messages {
    min-height: 300px;
    padding-inline: 12px;
  }

  .ai-message {
    max-width: 94%;
  }

  .ai-prompt-suggestions {
    flex-wrap: nowrap;
    overflow-x: auto;
  }

  .ai-prompt-suggestions button {
    flex: 0 0 auto;
  }

  .ai-composer {
    margin-inline: 10px;
  }

  .ai-privacy-note {
    margin-inline: 10px;
  }

  .secondary-btn {
    width: auto;
    flex: 1;
    padding: 0 9px;
  }

  .secondary-btn span {
    display: inline;
  }

  .schedule-insights {
    grid-template-columns: 1fr;
  }

  .insight-card span {
    white-space: normal;
  }

  .export-bar {
    padding-block: 14px;
    align-items: flex-start;
    flex-direction: column;
  }

  .export-actions {
    width: 100%;
  }

  .export-btn {
    flex: 1;
    padding-inline: 8px;
    font-size: 9px;
  }

  .field-grid.two-col,
  .field-grid.three-col {
    grid-template-columns: 1fr 1fr;
  }

  .field-grid.three-col .field:last-child {
    grid-column: 1 / -1;
  }

  .day-picker {
    gap: 5px;
  }

  .subject-list-head {
    display: none;
  }

  .subject-row {
    grid-template-columns: minmax(120px, 1fr) 54px 69px 18px;
    gap: 5px;
  }

  .table-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .toast-region {
    right: 14px;
    bottom: 14px;
    left: 14px;
  }

  .toast {
    min-width: 0;
    width: 100%;
  }
}

@media (max-width: 430px) {
  .setup-panel,
  .preview-panel {
    padding-inline: 14px;
  }

  .export-bar {
    margin-inline: -14px;
    padding-inline: 14px;
  }

  .panel-heading h1,
  .preview-top h2 {
    font-size: 20px;
  }

  .subject-row {
    grid-template-columns: minmax(110px, 1fr) 49px 64px 15px;
  }

  .remove-subject {
    width: 15px;
  }

  .secondary-btn span {
    font-size: 9px;
  }
}

@media print {
  @page {
    size: landscape;
    margin: 12mm;
  }

  body {
    background: #fff !important;
    color: #111 !important;
  }

  .topbar,
  .setup-panel,
  .preview-actions,
  .preview-top,
  .table-toolbar,
  .schedule-insights,
  .export-bar,
  .toast-region {
    display: none !important;
  }

  .workspace {
    display: block;
  }

  .preview-panel {
    padding: 0;
  }

  .timetable-card {
    border: 1px solid #cfd3dc;
    box-shadow: none;
  }

  .output-heading-preview {
    padding: 10px 10px 18px;
    color: #111 !important;
    border-bottom: 0;
    background: #fff !important;
    font-size: 24px;
  }

  .table-scroll {
    overflow: visible;
  }

  #timetableTable {
    min-width: 100%;
  }

  #timetableTable thead th,
  #timetableTable tbody th {
    background: #f7f7f9 !important;
  }

  #timetableTable tbody td,
  .period-card {
    background: #fff !important;
  }
}