@import "tailwindcss";

:root {
  --bg-canvas: #f0f0f0;
  --bg-primary: #ffffff;
  --bg-secondary: #fafafc;
  --bg-tertiary: #f0f0f4;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-muted: #888888;
  --border-color: #e0e0e0;
  --link-color: var(--text-primary);
  --link-visited: var(--text-secondary);
  --accent: #333333;
  --accent-muted: #666666;

  --background: 0 0% 100%;
  --foreground: 0 0% 20%;
  --card: 240 20% 99%;
  --card-foreground: 0 0% 20%;
  --popover: 0 0% 100%;
  --popover-foreground: 0 0% 20%;
  --primary: 0 0% 20%;
  --primary-foreground: 0 0% 100%;
  --secondary: 240 20% 98%;
  --secondary-foreground: 0 0% 20%;
  --muted: 240 20% 98%;
  --muted-foreground: 0 0% 53%;
  --accent: 240 20% 98%;
  --accent-foreground: 0 0% 20%;
  --destructive: 0 84% 60%;
  --destructive-foreground: 0 0% 98%;
  --border: 0 0% 88%;
  --input: 0 0% 88%;
  --ring: 0 0% 20%;
  --radius: 0.125rem;

  --topbar-height: 48px;

  --font-body: system-ui, -apple-system, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", Menlo, monospace;
}

.dark {
  --bg-canvas: hsl(0 0% 5%);
  --bg-primary: hsl(0 0% 9%);
  --bg-secondary: hsl(0 0% 12%);
  --bg-tertiary: hsl(0 0% 16%);
  --text-primary: hsl(0 0% 100%);
  --text-secondary: hsl(0 0% 75%);
  --text-muted: hsl(0 0% 50%);
  --border-color: hsl(0 0% 20%);
  --link-color: var(--text-primary);
  --link-visited: var(--text-secondary);
  --accent: hsl(0 0% 100%);
  --accent-muted: hsl(0 0% 75%);

  --background: 0 0% 9%;
  --foreground: 0 0% 100%;
  --card: 0 0% 9%;
  --card-foreground: 0 0% 100%;
  --popover: 0 0% 9%;
  --popover-foreground: 0 0% 100%;
  --primary: 0 0% 100%;
  --primary-foreground: 0 0% 9%;
  --secondary: 0 0% 12%;
  --secondary-foreground: 0 0% 100%;
  --muted: 0 0% 12%;
  --muted-foreground: 0 0% 50%;
  --accent: 0 0% 12%;
  --accent-foreground: 0 0% 100%;
  --destructive: 0 84% 60%;
  --destructive-foreground: 0 0% 100%;
  --border: 0 0% 20%;
  --input: 0 0% 20%;
  --ring: 0 0% 100%;
}

@theme inline {
  --color-background: hsl(var(--background));
  --color-foreground: hsl(var(--foreground));
  --color-card: hsl(var(--card));
  --color-card-foreground: hsl(var(--card-foreground));
  --color-popover: hsl(var(--popover));
  --color-popover-foreground: hsl(var(--popover-foreground));
  --color-primary: hsl(var(--primary));
  --color-primary-foreground: hsl(var(--primary-foreground));
  --color-secondary: hsl(var(--secondary));
  --color-secondary-foreground: hsl(var(--secondary-foreground));
  --color-muted: hsl(var(--muted));
  --color-muted-foreground: hsl(var(--muted-foreground));
  --color-accent: hsl(var(--accent));
  --color-accent-foreground: hsl(var(--accent-foreground));
  --color-destructive: hsl(var(--destructive));
  --color-destructive-foreground: hsl(var(--destructive-foreground));
  --color-border: hsl(var(--border));
  --color-input: hsl(var(--input));
  --color-ring: hsl(var(--ring));
  --radius: var(--radius);
  --font-sans: var(--font-sans);
  --font-mono: var(--font-mono);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  --font-body: var(--font-geist-sans), system-ui, -apple-system, sans-serif;
  --font-sans: var(--font-geist-sans), system-ui, -apple-system, sans-serif;
  --font-mono: var(--font-geist-mono), "JetBrains Mono", "Fira Code", Menlo, monospace;
  background: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.7;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: none;
}

button,
input {
  font: inherit;
}

.math-display {
  display: block;
  font-family: var(--font-mono);
  overflow-x: auto;
  white-space: nowrap;
}

.math-display-inline {
  display: inline;
  overflow: visible;
  white-space: normal;
}

.math-display-block {
  border: 1px solid var(--surface-line, var(--border-color));
  border-radius: 8px;
  color: var(--surface-strong, var(--text-primary));
  margin: 22px 0;
  padding: 16px 18px;
}

.math-display-render {
  display: none;
}

.auth-shell {
  align-items: center;
  background: #080808;
  display: flex;
  justify-content: center;
  min-height: 100vh;
  padding: 28px;
}

.surface-nav {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin: 0 0 48px;
}

.surface-brand {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-decoration: none;
  text-transform: uppercase;
}

.surface-nav-links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: flex-end;
}

.surface-nav-links a,
.surface-theme-toggle,
.surface-auth-button {
  align-items: center;
  background: transparent;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  font-family: var(--font-mono);
  font-size: 12px;
  height: 36px;
  justify-content: center;
  line-height: 1;
  padding: 0 14px;
  text-decoration: none;
  text-transform: uppercase;
}

.surface-theme-toggle {
  padding: 0;
  width: 36px;
}

.surface-user-avatar {
  height: 36px;
  width: 36px;
}

.surface-user-popover {
  border-radius: 8px;
}

.surface-nav-dark .surface-brand {
  color: var(--surface-strong, #f4f2ee);
}

.surface-nav-dark .surface-nav-links a,
.surface-nav-dark .surface-theme-toggle,
.surface-nav-dark .surface-auth-button {
  border: 1px solid var(--surface-line, #dedede);
  color: var(--surface-muted, #aaa);
}

.surface-nav-dark .surface-nav-links a:hover,
.surface-nav-dark .surface-theme-toggle:hover,
.surface-nav-dark .surface-auth-button:hover {
  border-color: var(--surface-muted, #666);
  color: var(--surface-strong, #f4f2ee);
}

.surface-nav-light .surface-brand {
  color: var(--surface-strong, #333);
}

.dark .surface-nav-light .surface-brand {
  color: var(--surface-strong, #fff);
}

.surface-nav-light .surface-nav-links a,
.surface-nav-light .surface-theme-toggle,
.surface-nav-light .surface-auth-button {
  border: 1px solid var(--surface-line, #dedede);
  color: var(--surface-muted, #555);
}

.surface-nav-light .surface-nav-links a:hover,
.surface-nav-light .surface-theme-toggle:hover,
.surface-nav-light .surface-auth-button:hover {
  border-color: var(--surface-muted, #777);
  color: var(--surface-strong, #333);
}

.dark .surface-nav-light .surface-nav-links a,
.dark .surface-nav-light .surface-theme-toggle,
.dark .surface-nav-light .surface-auth-button {
  border-color: var(--surface-line, #2a2a2a);
  color: var(--surface-muted, #aaa);
}

.dark .surface-nav-light .surface-nav-links a:hover,
.dark .surface-nav-light .surface-theme-toggle:hover,
.dark .surface-nav-light .surface-auth-button:hover {
  border-color: var(--surface-muted, #666);
  color: var(--surface-strong, #fff);
}

@media (max-width: 900px) {
  .surface-nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
    margin-bottom: 38px;
  }

  .surface-nav-links {
    justify-content: flex-start;
  }
}

.sumtex-dark-shell {
  min-height: calc(100vh - var(--topbar-height));
  background: #080808;
  color: #f4f2ee;
}

.ma-shell {
  min-height: calc(100vh - var(--topbar-height));
  background: #080808;
  color: #f4f2ee;
  padding: 34px 5vw 56px;
}

.ma-frame {
  margin: 0 auto;
  max-width: 1440px;
}

.ma-hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  margin: 0 0 46px;
}

.ma-kicker {
  color: #777;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  line-height: 1;
  margin: 0 0 22px;
  text-transform: uppercase;
}

.ma-title {
  color: #f5f3ef;
  font-size: clamp(44px, 6vw, 92px);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 0.95;
  margin: 0;
}

.ma-subtitle {
  color: #8d8d8d;
  font-size: 18px;
  line-height: 1.5;
  margin: 22px 0 0;
  max-width: 620px;
}

.ma-primary-action {
  align-items: center;
  background: transparent;
  border: 1px solid #3a3a3a;
  border-radius: 999px;
  color: #f1eee8;
  cursor: pointer;
  display: inline-flex;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  justify-content: center;
  letter-spacing: 0.14em;
  min-height: 54px;
  padding: 0 28px;
  text-transform: uppercase;
  transition: border-color 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

.ma-primary-action:hover {
  background: #151515;
  border-color: #686868;
}

.ma-layout {
  align-items: start;
  display: grid;
  gap: 44px;
  grid-template-columns: minmax(260px, 360px) minmax(0, 1fr);
}

.ma-rail {
  border-left: 1px solid #242424;
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-left: 26px;
}

.ma-group {
  display: grid;
  gap: 12px;
}

.ma-label {
  color: #777;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  line-height: 1;
  text-transform: uppercase;
}

.ma-category-list {
  display: grid;
  gap: 1px;
}

.ma-line-option,
.ma-toggle-row,
.ma-number-row {
  background: transparent;
  border: 0;
  border-bottom: 1px solid #1d1d1d;
  color: #d8d5ce;
  cursor: pointer;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  min-height: 46px;
  padding: 12px 0;
  text-align: left;
}

.ma-line-option:hover,
.ma-line-option.active {
  color: #fff;
}

.ma-line-option.active .ma-option-name::before {
  background: #f4f2ee;
}

.ma-option-name {
  align-items: center;
  display: inline-flex;
  font-size: 15px;
  gap: 10px;
}

.ma-option-name::before {
  background: #363636;
  border-radius: 999px;
  content: "";
  display: inline-block;
  height: 7px;
  width: 7px;
}

.ma-option-meta {
  color: #6f6f6f;
  font-size: 12px;
  max-width: 130px;
  text-align: right;
}

.ma-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ma-pill {
  background: transparent;
  border: 1px solid #343434;
  border-radius: 999px;
  color: #b8b4ad;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  min-height: 36px;
  padding: 0 14px;
  text-transform: uppercase;
}

.ma-pill.active {
  background: #f1eee8;
  border-color: #f1eee8;
  color: #080808;
}

.ma-stage {
  border-left: 1px solid #242424;
  min-height: 650px;
  padding-left: clamp(28px, 5vw, 76px);
}

.ma-metrics {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0 0 42px;
}

.ma-metric {
  border-top: 1px solid #242424;
  padding: 18px 22px 0 0;
}

.ma-metric-label {
  color: #777;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.ma-metric-value {
  color: #f1eee8;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1.2;
  margin-top: 8px;
}

.ma-problem-wrap {
  margin: 0 auto;
  max-width: 760px;
  text-align: center;
}

.ma-expression {
  color: #f7f4ef;
  font-family: var(--font-mono);
  font-size: clamp(46px, 7vw, 96px);
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.05;
  margin: 50px 0 34px;
  min-height: 110px;
}

.ma-expression.correct {
  color: #7fb68d;
}

.ma-expression.wrong {
  color: #c98462;
}

.ma-answer {
  background: #111;
  border: 1px solid #2f2f2f;
  border-radius: 999px;
  color: #f4f2ee;
  font-family: var(--font-mono);
  font-size: 28px;
  height: 66px;
  outline: none;
  padding: 0 26px;
  text-align: center;
  width: min(100%, 560px);
}

.ma-answer:focus {
  border-color: #777;
}

.ma-keypad {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 24px auto 0;
  max-width: 560px;
}

.ma-key {
  background: #101010;
  border: 1px solid #292929;
  border-radius: 999px;
  color: #d8d5ce;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 15px;
  height: 52px;
}

.ma-key:hover {
  background: #191919;
  border-color: #555;
}

.ma-empty {
  align-items: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 450px;
  text-align: center;
}

.ma-empty h2 {
  color: #f4f2ee;
  font-size: clamp(42px, 6vw, 82px);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1;
  margin: 0;
}

.ma-empty p {
  color: #8d8d8d;
  font-size: 17px;
  line-height: 1.5;
  margin: 20px 0 0;
  max-width: 520px;
}

.ma-recent {
  border-top: 1px solid #242424;
  margin-top: 52px;
  padding-top: 22px;
}

.ma-recent h3 {
  color: #777;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  margin: 0 0 14px;
  text-transform: uppercase;
}

.ma-recent-row {
  border-bottom: 1px solid #1c1c1c;
  color: #a8a39a;
  display: grid;
  font-family: var(--font-mono);
  font-size: 13px;
  gap: 16px;
  grid-template-columns: 1fr auto;
  padding: 12px 0;
}

.ma-number-row {
  align-items: center;
  color: #d8d5ce;
  cursor: default;
}

.ma-number-row input {
  background: #111;
  border: 1px solid #333;
  border-radius: 999px;
  color: #f4f2ee;
  height: 34px;
  padding: 0 12px;
  text-align: center;
  width: 78px;
}

.ma-toggle-row {
  align-items: center;
  color: #d8d5ce;
  cursor: default;
}

.ma-toggle-row input {
  accent-color: #f1eee8;
}

.act-shell {
  min-height: calc(100vh - var(--topbar-height));
  background: var(--bg-canvas);
  color: var(--text-primary);
}

.act-main {
  margin: 0 auto;
  max-width: 980px;
  padding: 44px 20px 72px;
}

.act-profile {
  align-items: center;
  display: flex;
  gap: 24px;
  justify-content: center;
  margin: 10px auto 34px;
  text-align: left;
}

.act-avatar {
  align-items: center;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  font-size: 42px;
  font-weight: 600;
  height: 104px;
  justify-content: center;
  overflow: hidden;
  width: 104px;
}

.act-identity h1 {
  color: var(--text-primary);
  font-size: 32px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.1;
  margin: 0 0 8px;
}

.act-identity p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.45;
  margin: 0;
}

.act-stats {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 0 0 28px;
}

.act-stat {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
}

.act-stat-badge {
  align-items: center;
  background: var(--bg-tertiary);
  border-radius: 999px;
  color: var(--text-secondary);
  display: flex;
  height: 30px;
  justify-content: center;
  margin-bottom: 12px;
  width: 30px;
}

.act-stat-value {
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.1;
}

.act-stat-label {
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.2;
  margin-top: 5px;
}

.act-feed {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.act-feed-tabs {
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  padding: 10px;
}

.act-tab {
  background: transparent;
  border: 0;
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 13px;
  padding: 8px 12px;
}

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

.act-feed-list {
  display: grid;
}

.act-feed-row {
  align-items: center;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr auto;
  padding: 16px 18px;
  text-align: left;
  width: 100%;
}

.act-feed-title {
  display: block;
  font-size: 15px;
  font-weight: 500;
}

.act-feed-time,
.act-pill {
  color: var(--text-muted);
  font-size: 12px;
}

.act-feed-side {
  align-items: center;
  display: flex;
  gap: 12px;
}

.act-feed-detail {
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.55;
  padding: 0 18px 18px;
}

.act-feed-empty {
  color: var(--text-secondary);
  padding: 24px 18px;
}

@media (max-width: 900px) {
  .ma-shell {
    padding: 28px 20px 48px;
  }

  .ma-hero {
    align-items: stretch;
    flex-direction: column;
    margin-bottom: 34px;
  }

  .ma-layout {
    grid-template-columns: 1fr;
  }

  .ma-rail,
  .ma-stage {
    border-left: 0;
    padding-left: 0;
  }

  .act-profile {
    align-items: center;
    flex-direction: column;
    text-align: center;
  }

  .act-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}