:root {
  --rosewater: #f5e0dc;
  --flamingo: #f2cdcd;
  --pink: #f5c2e7;
  --mauve: #cba6f7;
  --red: #f38ba8;
  --maroon: #eba0ac;
  --peach: #fab387;
  --yellow: #f9e2af;
  --green: #a6e3a1;
  --teal: #94e2d5;
  --sky: #89dceb;
  --sapphire: #74c7ec;
  --blue: #89b4fa;
  --lavender: #b4befe;
  --text: #ffffff;
  --subtext1: #e6e9f5;
  --subtext0: #cdd3e6;
  --overlay2: #aeb7d0;
  --overlay1: #8f99b7;
  --overlay0: #707a98;
  --surface2: #585b70;
  --surface1: #45475a;
  --surface0: #313244;
  --base: #1e1e2e;
  --mantle: #181825;
  --crust: #11111b;
  --primary-bg: #33476b;
  --primary-border: #89b4fa;
  --success-bg: #2f4a38;
  --success-border: #a6e3a1;
  --danger-bg: #5a3140;
  --danger-border: #f38ba8;
  --warning-bg: #5a4a26;
  --warning-border: #f9e2af;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: var(--crust);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  padding: 24px 16px 40px;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
.flash-card:focus-visible,
.tab:focus-visible,
.format-box:focus-visible {
  outline: 3px solid rgba(137, 180, 250, 0.45);
  outline-offset: 2px;
}

code,
pre,
textarea,
.format-box {
  font-family: "SFMono-Regular", ui-monospace, "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;
}

h1,
h2,
h3,
p {
  margin: 0;
  color: var(--text);
}

h1 {
  font-size: clamp(2rem, 3vw, 2.8rem);
  line-height: 1.05;
}

h2 {
  font-size: 1.05rem;
}

.app-shell {
  width: min(1380px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.card,
.subcard,
.stat,
.table-wrap,
.editor-card,
.flash-card {
  background: var(--mantle);
  border: 1px solid var(--surface1);
}

.card,
.subcard {
  border-radius: var(--radius-lg);
}

.hero,
.sidebar,
.content,
.subcard {
  padding: 18px;
}

.hero {
  display: grid;
  gap: 14px;
}

.hero-text {
  display: grid;
  gap: 8px;
}

.hero-text p {
  color: var(--subtext1);
  max-width: 70ch;
  line-height: 1.5;
}

.tabs,
.btn-row,
.hotkeys,
.card-tags,
.two-col,
.stats-grid,
.make-grid,
.study-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.main-grid {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 16px;
}

.stack {
  display: grid;
  gap: 14px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.compact {
  gap: 8px;
}

.content {
  min-width: 0;
}

.tab,
.btn {
  border: 1px solid var(--surface1);
  background: var(--surface0);
  color: var(--text);
  border-radius: 14px;
  padding: 11px 14px;
  min-height: 44px;
  transition: background-color 0.12s ease, border-color 0.12s ease;
}

.tab:hover,
.btn:hover {
  border-color: var(--overlay2);
}

.tab.active {
  background: var(--primary-bg);
  border-color: var(--primary-border);
  color: var(--text);
}

.btn.primary {
  background: var(--primary-bg);
  border-color: var(--primary-border);
  color: var(--text);
}

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

.btn.danger {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--text);
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  color: var(--subtext1);
  font-size: 0.95rem;
}

input,
textarea,
select {
  width: 100%;
  background: var(--base);
  color: var(--text);
  border: 1px solid var(--surface1);
  border-radius: 14px;
  padding: 12px 14px;
}

input::placeholder,
textarea::placeholder {
  color: var(--overlay2);
}

textarea {
  resize: vertical;
  line-height: 1.5;
}

.notice {
  border-radius: 14px;
  background: var(--surface0);
  border: 1px solid var(--surface1);
  color: var(--text);
  padding: 12px 14px;
  line-height: 1.5;
}

.notice.warn {
  background: var(--warning-bg);
  border-color: var(--warning-border);
  color: var(--text);
}

.message {
  border-radius: 16px;
  padding: 13px 16px;
  background: var(--surface0);
  border: 1px solid var(--surface1);
  color: var(--text);
}

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

.message.warn {
  background: var(--warning-bg);
  border-color: var(--warning-border);
  color: var(--text);
}

.message.error {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--text);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.stat {
  border-radius: 16px;
  padding: 14px;
  display: grid;
  gap: 6px;
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  word-break: break-word;
}

.stat-label {
  color: var(--subtext1);
  font-size: 0.84rem;
}

.format-box {
  margin: 0;
  overflow: auto;
  background: var(--base);
  border: 1px solid var(--surface1);
  border-radius: 16px;
  padding: 14px;
  color: var(--text);
  line-height: 1.5;
}

.panel {
  display: none;
}

.panel.active {
  display: grid;
  gap: 16px;
}

.study-grid {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.hotkeys {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.hotkeys span {
  border-radius: 12px;
  background: var(--surface0);
  border: 1px solid var(--surface1);
  color: var(--text);
  padding: 10px 12px;
  font-size: 0.92rem;
}

.flash-card {
  width: 100%;
  min-height: 320px;
  border-radius: 24px;
  padding: 24px;
  display: grid;
  gap: 18px;
  text-align: left;
  align-content: start;
  background: var(--mantle);
}

.card-face-label {
  display: inline-flex;
  width: fit-content;
  border-radius: 999px;
  background: var(--surface0);
  color: var(--text);
  border: 1px solid var(--surface1);
  padding: 8px 12px;
  font-size: 0.92rem;
}

.card-text {
  font-size: clamp(1.15rem, 2vw, 1.6rem);
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 24px;
}

.tag {
  border-radius: 999px;
  padding: 7px 10px;
  background: var(--surface0);
  border: 1px solid var(--surface1);
  color: var(--text);
  font-size: 0.84rem;
}

.card-actions {
  justify-content: stretch;
}

.table-wrap {
  border-radius: 18px;
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
  color: var(--text);
}

th,
td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--surface1);
  vertical-align: top;
}

th {
  color: var(--text);
  background: var(--base);
  position: sticky;
  top: 0;
}

.editor-list {
  display: grid;
  gap: 14px;
}

.editor-card {
  border-radius: 18px;
  padding: 16px;
  display: grid;
  gap: 12px;
}

.editor-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.editor-top strong {
  color: var(--text);
}

.editor-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.make-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.file-list {
  display: grid;
  gap: 10px;
}

.hidden {
  display: none !important;
}

@media (max-width: 1120px) {
  .main-grid,
  .study-grid,
  .make-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: 2;
  }
}

@media (max-width: 720px) {
  body {
    padding: 16px 12px 28px;
  }

  .card,
  .subcard,
  .hero,
  .sidebar,
  .content {
    padding: 14px;
  }

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

  .flash-card {
    min-height: 240px;
    padding: 18px;
  }

  .tab,
  .btn {
    width: 100%;
  }

  .tabs,
  .btn-row {
    display: grid;
    grid-template-columns: 1fr;
  }
}