/* TON product site — visual system aligned with kimi.com/code (dark theme). */

:root {
  color-scheme: dark;

  --Colors-KMBlue: #1a88ff;
  --Colors-KMBlue-hover: rgba(37, 142, 255, 1);
  --Colors-Yellow: #ffd230;
  --Colors-Red: #ff4756;
  --Colors-PositiveGreen: #16c456;
  --Others-KMBlue10: rgba(26, 136, 255, 0.12);

  --Bg-Primary: #121212;
  --Bg-Secondary: #1f1f1f;
  --Bg-Tertiary: #292929;
  --Bg-Quaternary: #4d4d4d;
  --Bg-Ground: #181817;

  --Labels-Primary: rgba(255, 255, 255, 0.84);
  --Labels-Primary-solid: #f2f2f2;
  --Labels-Secondary: rgba(255, 255, 255, 0.56);
  --Labels-Tertiary: rgba(255, 255, 255, 0.42);
  --Labels-Quaternary: rgba(255, 255, 255, 0.26);

  --Fills-F1: rgba(255, 255, 255, 0.05);
  --Fills-F2: rgba(255, 255, 255, 0.1);
  --Separators-S1: rgba(255, 255, 255, 0.12);
  --Always-White: #ffffff;

  --font-sans: "PingFang SC", "SF Pro Text", "Segoe UI", "Noto Sans SC",
    system-ui, -apple-system, sans-serif;
  --font-mono: "Geist Mono", "SF Mono", "JetBrains Mono", "Cascadia Code",
    ui-monospace, Menlo, Consolas, monospace;

  --max: 1440px;
  --pad-x: 80px;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--Labels-Primary);
  background: var(--Bg-Primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

button {
  font: inherit;
}

.page {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
}

/* —— Header —— */
.ton-header {
  position: sticky;
  top: 0;
  z-index: 20;
  width: 100%;
  background: var(--Bg-Primary);
  border-bottom: 0.5px solid var(--Separators-S1);
}

.ton-nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ton-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--Labels-Primary);
}

.ton-logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  object-fit: cover;
  display: block;
  flex-shrink: 0;
}

.ton-nav-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.ton-nav-link {
  color: var(--Labels-Secondary);
  background: none;
  border: none;
  border-radius: 8px;
  padding: 4px 8px;
  font-size: 16px;
  line-height: 24px;
  cursor: pointer;
  transition: color 0.2s ease;
}

.ton-nav-link:hover {
  color: var(--Labels-Primary);
  font-weight: 500;
}

/* —— Language switcher (Kimi-style icon + dropdown) —— */
.lang-switch {
  position: relative;
  display: flex;
  align-items: center;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0.5px solid var(--Separators-S1);
  border-radius: 10px;
  background: var(--Bg-Secondary);
  color: var(--Labels-Primary);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.lang-btn:hover,
.lang-btn[aria-expanded="true"] {
  background: var(--Bg-Tertiary, #2a2a2a);
  border-color: var(--Separators-S2, rgba(255, 255, 255, 0.16));
}

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 30;
  min-width: 168px;
  padding: 6px;
  border-radius: 12px;
  border: 0.5px solid var(--Separators-S1);
  background: var(--Bg-Secondary);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  display: none;
  flex-direction: column;
  gap: 2px;
}

.lang-menu.open {
  display: flex;
}

.lang-menu button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 10px 12px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--Labels-Primary);
  font-size: 14px;
  line-height: 20px;
  text-align: left;
  cursor: pointer;
}

.lang-menu button:hover {
  background: var(--Fills-F1);
}

.lang-menu button .lang-check {
  opacity: 0;
  color: var(--Colors-KMBlue);
  flex-shrink: 0;
}

.lang-menu button.active .lang-check,
.lang-menu button[aria-selected="true"] .lang-check {
  opacity: 1;
}

.ton-mobile-only {
  display: none;
}

.ton-desktop-only {
  display: flex;
}

.ton-mobile-menu-btn {
  display: none;
  border: none;
  background: none;
  color: var(--Labels-Primary);
  border-radius: 12px;
  padding: 4px;
  cursor: pointer;
}

.ton-mobile-menu-btn:hover {
  background: var(--Fills-F1);
}

.ton-mobile-panel {
  display: none;
  position: absolute;
  right: 20px;
  top: 64px;
  min-width: 160px;
  background: var(--Bg-Tertiary);
  border: 0.5px solid var(--Separators-S1);
  border-radius: 12px;
  padding: 6px;
  box-shadow: 0 4px 10px #0000001a;
}

.ton-mobile-panel.open {
  display: block;
}

.ton-mobile-panel a {
  display: block;
  padding: 10px 8px;
  border-radius: 6px;
  font-size: 14px;
}

.ton-mobile-panel a:hover {
  background: var(--Fills-F1);
}

/* —— Banner —— */
.ton-banner {
  margin: 96px auto 0;
  display: flex;
  justify-content: center;
  padding: 0 24px;
}

.ton-banner-content {
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: 1200px;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--Others-KMBlue10);
  backdrop-filter: blur(1px);
}

.ton-banner-text,
.ton-banner-action {
  margin: 0;
  color: var(--Colors-KMBlue);
  font-size: 14px;
  line-height: 20px;
}

.ton-banner-action {
  font-weight: 500;
  white-space: nowrap;
}

/* —— Hero —— */
.ton-hero {
  width: 100%;
  margin-top: 32px;
  padding: 0 24px;
  display: flex;
  justify-content: center;
}

.ton-hero-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.ton-hero-title {
  margin: 0;
  font-size: 48px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.96px;
  color: var(--Labels-Primary);
}

.ton-hero-subtitle {
  margin: 0;
  max-width: 800px;
  font-size: 20px;
  line-height: 30px;
  color: var(--Labels-Secondary);
}

/* —— Install —— */
.ton-install {
  width: 100%;
  max-width: 590px;
  margin: 0 auto 96px;
  padding: 32px 24px 0;
  display: flex;
  justify-content: center;
}

.install-options {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.install-hint {
  margin: 0;
  padding: 0 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--Labels-Tertiary, #8e8e93);
}

.install-hint code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--Labels-Secondary, #aeaeb2);
}

.install-input {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px;
  border-radius: 14px;
  background: var(--Bg-Secondary);
}

.install-select-wrap {
  position: relative;
  flex-shrink: 0;
}

.install-select {
  flex-shrink: 0;
  height: 32px;
  padding: 0 8px 0 10px;
  border-radius: 10px;
  background: var(--Labels-Primary-solid);
  color: var(--Bg-Primary);
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  border: none;
}

.install-select svg {
  width: 12px;
  height: 12px;
  color: var(--Bg-Primary);
}

.install-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  padding: 6px;
  border-radius: 12px;
  background: var(--Bg-Tertiary);
  box-shadow: 0 4px 10px #0000001a;
  z-index: 30;
  border: 0.5px solid var(--Separators-S1);
}

.install-menu.open {
  display: block;
}

.install-menu button {
  width: 100%;
  text-align: left;
  border: none;
  background: none;
  border-radius: 6px;
  padding: 10px 8px;
  font-size: 14px;
  color: var(--Labels-Primary);
  cursor: pointer;
}

.install-menu button:hover,
.install-menu button.active {
  background: var(--Fills-F1);
}

.command-display {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.command-text {
  flex: 1;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 20px;
  color: var(--Labels-Secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.copy-btn {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--Labels-Secondary);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: color 0.2s, background-color 0.2s;
}

.copy-btn:hover {
  color: var(--Labels-Primary);
  background: var(--Fills-F1);
}

.copy-btn.copied {
  color: var(--Colors-PositiveGreen);
}

.ton-cta-row {
  display: none;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin: 32px 0 80px;
}

.ton-btn {
  height: 40px;
  padding: 0 16px;
  border-radius: 12px;
  border: none;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s, color 0.2s, opacity 0.2s;
}

.ton-btn.primary {
  background: var(--Labels-Primary-solid);
  color: var(--Bg-Primary);
}

.ton-btn.primary:hover {
  opacity: 0.88;
}

.ton-btn.plain {
  background: var(--Bg-Secondary);
  color: var(--Labels-Primary);
}

.ton-btn.plain:hover {
  background: var(--Bg-Tertiary);
}

.ton-cta-desktop {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin: -64px auto 80px;
  padding: 0 24px;
}

/* —— Feature tabs —— */
.feature-section {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  padding: 0 24px 96px;
}

.section-title {
  margin: 0;
  text-align: center;
  font-size: 24px;
  font-weight: 600;
  color: var(--Labels-Primary);
}

.tabs-switcher {
  display: flex;
  align-items: center;
  height: 36px;
  padding: 3px;
  border-radius: 8px;
  background: var(--Fills-F2);
  border: 0.5px solid var(--Separators-S1);
}

.tab-item {
  min-width: 80px;
  height: 100%;
  padding: 3px 16px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--Labels-Secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  background: transparent;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.tab-item:hover {
  color: var(--Labels-Primary);
}

.tab-item.active {
  /* Kimi dark: active chip uses Quaternary (#4D4D4D) on F2 track */
  background: var(--Bg-Quaternary);
  color: var(--Labels-Primary);
  font-weight: 500;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
}

.content-display {
  width: min(1000px, 100%);
  aspect-ratio: 775 / 415;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}

.content-wrapper {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: 100px;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(26, 136, 255, 0.18), transparent 60%),
    linear-gradient(180deg, #1a1f2a 0%, #141414 45%, #121212 100%);
}

.content-wrapper.drivers {
  background:
    radial-gradient(ellipse 70% 50% at 50% 10%, rgba(161, 107, 255, 0.16), transparent 55%),
    linear-gradient(180deg, #1c1826 0%, #141414 50%, #121212 100%);
}

.panel {
  display: none;
  width: 100%;
  height: 100%;
  justify-content: center;
  align-items: flex-start;
  padding-top: 100px;
}

.panel.active {
  display: flex;
}

.terminal-window {
  width: min(800px, calc(100% - 96px));
  height: min(492px, 90%);
  background: var(--Bg-Secondary);
  border: 0.5px solid var(--Separators-S1);
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 18px 25px 6px #00000066;
}

.window-header {
  height: 40px;
  padding: 8px 9px;
  border-bottom: 0.5px solid var(--Separators-S1);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.controls {
  width: 60px;
  padding-left: 4px;
  display: flex;
  gap: 8px;
}

.control-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.control-dot.red {
  background: var(--Colors-Red);
}

.control-dot.yellow {
  background: var(--Colors-Yellow);
}

.control-dot.green {
  background: var(--Colors-PositiveGreen);
}

.window-title {
  flex: 1;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--Labels-Secondary);
}

.header-spacer {
  width: 60px;
}

.window-content {
  flex: 1;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 22px;
  overflow: auto;
}

.welcome-box {
  border: 0.5px solid var(--Colors-KMBlue);
  border-radius: 14px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.box-row {
  display: flex;
  gap: 13px;
}

.ton-brand-badge {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  line-height: 0;
}

.ton-brand-badge img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  display: block;
  vertical-align: top;
}

.welcome-text {
  color: var(--Labels-Secondary);
  display: flex;
  flex-direction: column;
}

.welcome-text p {
  margin: 0;
}

.model-line {
  color: var(--Labels-Secondary);
}

.cli-output {
  color: var(--Labels-Secondary);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cmd-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}

.prompt-user {
  color: var(--Labels-Primary);
}

.prompt-input {
  color: var(--Labels-Secondary);
  margin-left: 4px;
}

.input-box {
  border: 0.5px solid var(--Colors-KMBlue);
  border-radius: 6px;
  padding: 4px 8px;
  color: var(--Labels-Primary);
  width: fit-content;
  max-width: 100%;
}

.thinking-line,
.response-line {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.bullet {
  color: var(--Colors-Yellow);
  flex-shrink: 0;
  font-size: 10px;
  line-height: 22px;
}

.thinking-text {
  color: var(--Labels-Tertiary);
  font-style: italic;
}

.response-text {
  color: var(--Labels-Primary);
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.feature-item {
  display: flex;
  gap: 8px;
  color: var(--Labels-Secondary);
}

.bullet-small {
  color: var(--Labels-Quaternary);
  font-size: 8px;
  line-height: 22px;
}

.drivers-card {
  width: min(800px, calc(100% - 96px));
  background: var(--Bg-Secondary);
  border: 0.5px solid var(--Separators-S1);
  border-radius: 14px;
  padding: 28px 32px;
  box-shadow: 0 18px 25px 6px #00000066;
}

.drivers-card h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 600;
}

.drivers-card p {
  margin: 0 0 20px;
  color: var(--Labels-Secondary);
  font-size: 15px;
  line-height: 24px;
}

.driver-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.driver-chip {
  background: var(--Bg-Tertiary);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.driver-chip strong {
  font-size: 15px;
}

.driver-chip span {
  font-size: 13px;
  color: var(--Labels-Secondary);
  line-height: 18px;
}

.feature-install {
  width: min(590px, 100%);
  margin-top: 8px;
}

.feature-install .ton-btn {
  display: none;
}

/* —— Loop section (replaces pricing) —— */
.loop-section {
  width: 100%;
  padding: 48px 24px 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden; /* scroll lives on .loop-flow-scroll */
}

.loop-section h2 {
  margin: 0 0 8px;
  text-align: center;
  font-size: 24px;
  font-weight: 600;
}

.loop-section .sub {
  margin: 0 0 32px;
  text-align: center;
  color: var(--Labels-Secondary);
  font-size: 16px;
  line-height: 24px;
}

/* Full-bleed scrollport so one row never wraps; swipe/scroll on narrow viewports. */
.loop-flow-scroll {
  width: 100%;
  max-width: 1200px;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--Fills-F3, rgba(255, 255, 255, 0.18)) transparent;
  padding-bottom: 4px;
}

.loop-flow {
  display: flex;
  flex-wrap: nowrap;
  align-items: stretch;
  justify-content: center;
  gap: 8px;
  width: max-content;
  min-width: 100%;
  margin: 0 auto;
  padding: 0 8px;
  box-sizing: border-box;
}

.loop-step {
  background: var(--Bg-Secondary);
  border: 0.5px solid var(--Separators-S1);
  border-radius: 12px;
  padding: 12px 14px;
  min-width: 108px;
  flex: 0 0 auto;
  text-align: center;
}

.loop-step strong {
  display: block;
  font-size: 13px;
  margin-bottom: 4px;
}

.loop-step span {
  font-size: 11px;
  color: var(--Labels-Secondary);
  line-height: 1.35;
  white-space: nowrap;
}

.loop-arrow {
  align-self: center;
  color: var(--Labels-Quaternary);
  font-size: 16px;
  flex: 0 0 auto;
  line-height: 1;
}

/* —— Footer —— */
.ton-footer {
  width: 100%;
  background: #0a0a0a;
  color: #fff;
  padding: 56px 0 24px;
  display: flex;
  justify-content: center;
  border-top: 0.5px solid var(--Separators-S1);
}

.footer-container {
  width: 100%;
  max-width: var(--max);
  padding: 0 var(--pad-x);
  display: flex;
  flex-direction: column;
}

.footer-main {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 56px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand .name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.footer-brand .tag {
  color: #fff9;
  font-size: 14px;
  max-width: 280px;
  line-height: 22px;
}

.footer-cols {
  display: flex;
  flex-wrap: wrap;
  gap: 64px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 130px;
}

.footer-col .head {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
}

.footer-col a {
  color: #fff9;
  font-size: 14px;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid #ffffff1a;
  padding-top: 24px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  color: #fff6;
  font-size: 13px;
}

.footer-bottom a {
  color: #fff6;
}

.footer-bottom a:hover {
  color: #fffc;
}

/* —— Responsive —— */
@media (max-width: 1200px) {
  :root {
    --pad-x: 40px;
  }
}

@media (max-width: 1000px) {
  .content-wrapper,
  .panel {
    padding-top: 24px;
  }

  .terminal-window,
  .drivers-card {
    width: calc(100% - 96px);
  }

  .driver-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  :root {
    --pad-x: 20px;
  }

  .ton-desktop-only {
    display: none !important;
  }

  .ton-mobile-menu-btn {
    display: flex;
  }

  .ton-banner {
    margin-top: 80px;
  }

  .ton-banner-content {
    gap: 16px;
  }

  .ton-install {
    display: none;
  }

  .ton-cta-desktop {
    display: none;
  }

  .ton-cta-row {
    display: flex;
  }

  .feature-install .install-input {
    display: none;
  }

  .feature-install .ton-btn {
    display: inline-flex;
  }
}

@media (max-width: 600px) {
  .ton-hero-title {
    font-size: 40px;
  }

  .ton-hero-subtitle {
    font-size: 16px;
    line-height: 24px;
  }

  .terminal-window,
  .drivers-card {
    width: calc(100% - 48px);
  }

  .footer-main {
    flex-direction: column;
    gap: 48px;
  }

  .footer-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px 24px;
  }

  .ton-footer {
    padding: 48px 0 24px;
  }
}