:root {

  --bg:        #ffffff;
  --bg-2:      #f5f6f8;
  --surface:   #ffffff;
  --surface-2: #f4f5f7;

  --ink:    oklch(0.28 0.035 265);
  --fg-2:   oklch(0.44 0.028 265);
  --fg-3:   oklch(0.58 0.022 265);
  --fg-4:   oklch(0.70 0.016 265);

  --line:   oklch(0.92 0.006 265);
  --line-2: oklch(0.87 0.010 265);

  --accent:        oklch(0.635 0.205 33);
  --accent-deep:   oklch(0.555 0.190 32);
  --accent-soft:   oklch(0.965 0.022 45);
  --accent-line:   oklch(0.88 0.060 45);
  --accent-ink:    oklch(0.99 0.01 70);

  --saff: oklch(0.60 0.13 60);

  --green: oklch(0.58 0.13 150);

  --font-ui:   system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
  --font-deva: 'Nirmala UI', 'Mangal', sans-serif;
  --font-mono: 'Kruti Dev 010', 'Kruti Dev', ui-monospace, 'Consolas', monospace;

  --r-sm:  10px;
  --r-md:  16px;
  --r-lg:  24px;
  --r-xl:  32px;
  --pill:  9999px;

  --sh-sm: 0 1px 2px oklch(0.28 0.035 265 / .06);
  --sh-md: 0 4px 16px -6px oklch(0.28 0.035 265 / .12);
  --sh-lg: 0 24px 60px -28px oklch(0.28 0.035 265 / .22);

  --max:    1357px;
  --prose:  720px;
  --pad-x:  clamp(20px, 5vw, 48px);

  --gap-section: clamp(64px, 9vw, 124px);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur:  0.22s;

  --u2k-glass: rgba(255,255,255,.95);
  --u2k-line: #ebeef5;
  --u2k-pad-x: 40px;
  --u2k-pill: 9999px;
  --u2k-logo-red: #d7262f;
  --u2k-logo-red-glow: rgba(215,38,47,.28);
  --u2k-saffron: #d97742;
  --u2k-saffron-deep: #8f4218;
  --u2k-ink: #1c2540;
  --u2k-ink-soft: #2c3654;
  --u2k-fg-4: #969db4;
  --u2k-teal: #ff3b16;
  --u2k-display: var(--font-ui);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
img, svg { display: block; max-width: 100%; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--accent-soft); color: var(--accent-deep); }

.u2k-nav {
  position: sticky; top: 0; z-index: 50;

  background: var(--u2k-glass);
  border-bottom: 1px solid var(--u2k-line);
  padding: 7px var(--u2k-pad-x);
  display: flex; align-items: center; gap: 28px;
}
.u2k-brand { display: flex; align-items: center; gap: 10px; }
.u2k-brand-mark {
  position: relative;
  width: 31px; height: 31px; border-radius: var(--u2k-pill);
  background: var(--u2k-logo-red);
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 1px 0 rgba(255,255,255,.32) inset, 0 18px 40px -22px var(--u2k-logo-red-glow);
  font-family: var(--u2k-display);
  font-weight: 900; font-size: 11px; color: #fff;
  letter-spacing: -.3px; flex-shrink: 0;
}
.u2k-brand-mark::after {
  content: ""; position: absolute; top: 2px; right: 2px;
  width: 7px; height: 7px; border-radius: var(--u2k-pill);
  background: var(--u2k-saffron);
  box-shadow: 0 0 0 2px #fff;
}
.u2k-brand-mark span { display: none; }
.u2k-brand-mark .mark-text {
  display: inline-block;
  font-family: var(--u2k-display);
  font-weight: 900; font-size: 11px; letter-spacing: -.3px;
  color: #fff; line-height: 1;
}
.u2k-brand-name {
  font-family: var(--u2k-display); font-weight: 800;
  font-size: 17px; letter-spacing: -.3px; color: var(--u2k-ink);
}
.u2k-brand-name .accent { color: var(--u2k-saffron-deep); }
.u2k-brand-name .tld { font-weight: 600; color: var(--u2k-fg-4); font-size: 11px; margin-left: 2px; }

.u2k-nav .u2k-brand-name {
  background: linear-gradient(95deg, #e0123a 0%, #c81d9e 34%, #7c3aed 56%, #2563eb 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.u2k-nav .u2k-brand-name .accent { -webkit-text-fill-color: transparent; }
.u2k-nav .u2k-brand-name .tld { -webkit-text-fill-color: #f7941d; color: #f7941d; }

.u2k-brand-mark {
  width: 34px; height: 34px; border-radius: 0;
  background: url("/logo.png?v=20260610") center / contain no-repeat;
  box-shadow: none;
}
.u2k-brand-mark::after { display: none; }
.u2k-brand-mark .mark-text { display: none; }

.u2k-nav-links { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.u2k-nav-links a {
  font-size: 13.5px; font-weight: 600; color: var(--u2k-ink-soft);
  position: relative; padding: 4px 0;
}
.u2k-nav-links a:hover { color: var(--u2k-teal); }
.u2k-nav-links a.active { color: var(--u2k-ink); font-size: 16.5px; font-weight: 800; }
.u2k-nav-links a.active:hover { color: var(--u2k-ink); }
.u2k-nav-links a.active::after { display: none; }
.u2k-nav-actions { display: flex; align-items: center; justify-content: flex-end; gap: 10px; }
.u2k-nav-actions > .u2k-btn--ghost { display: none; }

.u2k-trust--tabs {
  margin: 0; padding: 3px var(--pad-x);
  background: var(--surface-2);
  border-bottom: 1px solid var(--line-2);
  text-align: center;
}
.u2k-tabs {
  display: inline-flex; flex-wrap: wrap; justify-content: center;
  gap: 2px; padding: 0;
  background: transparent;
  border: none;
}
.u2k-tabs a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: var(--pill);
  font-size: 12.5px; font-weight: 600; color: var(--fg-2);
  background: transparent;
  border: 1px solid transparent;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.u2k-tabs a:hover { color: var(--ink); background: #fff; }
.u2k-tabs a.active {
  color: var(--accent-ink);
  background: linear-gradient(150deg, var(--accent), var(--accent-deep));
  border-color: transparent;
  box-shadow: var(--sh-sm);
}
.u2k-tabs .ext-ico { width: 11px; height: 11px; opacity: 0.45; }
.u2k-tabs .u2k-ico { width: 13px; height: 13px; }
.u2k-badge { display: none; }
.u2k-tabs a.active .u2k-badge { background: oklch(1 0 0 / .22); color: var(--accent-ink); }

.u2k-main { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad-x); }

.u2k-hero {
  text-align: center;
  padding: clamp(24px, 3.2vw, 40px) 0 clamp(11px, 1.6vw, 16px);
}
.u2k-hero h1 {
  font-size: clamp(1.7rem, 4.4vw, 3.1rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.u2k-hero-lead { font-weight: 700; color: var(--fg-3); }
.u2k-hero h1 .underline-saff {
  position: relative; display: inline-block; padding-bottom: 8px;
  background: none;
  -webkit-text-fill-color: var(--ink); color: var(--ink);
}
.u2k-hero h1 .underline-saff::after {
  content: ""; position: absolute; left: 4px; right: 4px; bottom: 2px;
  height: 2.5px; border-radius: 999px;
  background: linear-gradient(92deg, #ef4b22 0%, #f0a830 45%, #ff4aa2 100%);
  opacity: .95;
}
.u2k-hero-answer {
  max-width: 900px; margin: clamp(12px, 1.8vw, 18px) auto 0;
  font-size: clamp(0.9rem, 1.2vw, 1.0625rem);
  font-weight: 400; line-height: 1.5; color: oklch(0.36 0.025 265);
}

.u2k-converter-wrap {
  max-width: var(--max); margin: clamp(12px, 1.7vw, 20px) auto 0;
  padding: 0 var(--pad-x);
}

.u2k-main .u2k-converter-wrap { padding: 0; }
.u2k-converter {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  box-shadow: var(--sh-lg);
  overflow: hidden;
}

.u2k-status { display: none; }
.u2k-panel:last-child:has(.u2k-editor.kruti:not(:placeholder-shown)) .u2k-panel-title::after {
  content: "Converted";
  font-family: var(--font-ui); font-weight: 700; font-size: 11px; letter-spacing: 0.02em;
  background: linear-gradient(95deg, #e0123a 0%, #c81d9e 34%, #7c3aed 56%, #2563eb 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.u2k-status:empty { display: none; }

.u2k-panels { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0; }
.u2k-panel { position: relative; padding: 12px 24px 0; min-width: 0; }
.u2k-panel:first-child { border-right: 1px solid var(--line); }

.u2k-panel-head {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  margin: -12px -24px 0; gap: 8px 14px; padding: 9px 24px 8px;
  background: var(--surface-2); border-bottom: 1px solid var(--line);
}
.u2k-panel-head > div:first-child { min-width: 0; }
.u2k-panel-title {
  font-family: var(--font-ui); font-weight: 750; font-size: 18px;
  color: var(--ink); line-height: 1.15;
  display: flex; align-items: baseline; gap: 7px;
}
.u2k-panel-title-muted { color: var(--fg-4); font-size: .72em; font-weight: 600; white-space: nowrap; }
.u2k-panel-tools { display: flex; gap: 6px; flex-wrap: nowrap; align-items: center; justify-content: flex-end; }

.u2k-tool {
  padding: 7px 12px; border: 1px solid var(--line-2); border-radius: var(--pill);
  background: var(--surface); font-size: 12.5px; font-weight: 600; color: var(--fg-2);
  display: inline-flex; align-items: center; gap: 6px; transition: all .15s ease;
}
.u2k-tool:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.u2k-tool .u2k-ico { width: 14px; height: 14px; flex: none; }
.u2k-tool:disabled, .u2k-tool:disabled:hover {
  color: var(--fg-4); background: var(--surface-2); border-color: var(--line);
  cursor: not-allowed; opacity: .65; box-shadow: none;
}
.u2k-tool:disabled .u2k-ico { color: var(--fg-4); }

.u2k-tool--copy:not(:disabled) { background: #fff; border-color: var(--line-2); color: #15803d; }
.u2k-tool--copy:not(:disabled) .u2k-ico { color: #16a34a; }
.u2k-tool--copy:not(:disabled):hover { border-color: #16a34a; color: #15803d; }

.u2k-tool--paste, .u2k-tool--paste .u2k-ico { color: var(--accent); }

.u2k-textarea-wrap { position: relative; margin: 0 -24px; transition: background .15s ease; }
.u2k-textarea-wrap::after {
  content: ""; position: absolute; inset: 6px 14px;
  border: 2px solid transparent; border-radius: 14px;
  pointer-events: none; transition: border-color .15s ease;
}
.u2k-panel:first-child .u2k-textarea-wrap:focus-within { background: #fbfdff; }
.u2k-panel:first-child .u2k-textarea-wrap:focus-within::after { border-color: var(--accent); }
.u2k-panel:nth-child(2) .u2k-textarea-wrap { background: #f8fbff; }
.u2k-editor {
  width: 100%; min-height: 359px; border: none; outline: none; resize: none;
  padding: 16px 28px 18px; font-size: 15.5px; line-height: 1.6;
  color: var(--ink); background: transparent;
}
.u2k-editor.unicode { font-family: var(--font-deva); font-weight: 500; }
.u2k-editor.kruti { font-family: var(--font-mono); font-size: 15.5px; letter-spacing: .2px; background: #f8fbff; color: #2f343a; }
.u2k-editor.unicode.u2k-editor--default { color: var(--fg-4); font-family: var(--font-deva); }
.u2k-editor::placeholder { color: var(--fg-4); font-family: var(--font-deva); }

.u2k-panel:nth-child(2) .u2k-editor::placeholder { color: transparent; }
.u2k-panel:nth-child(2) .u2k-textarea-wrap { position: relative; }
.u2k-panel:nth-child(2) .u2k-textarea-wrap:has(.u2k-editor:placeholder-shown)::before {
  content: "Automatic conversion:";
  position: absolute; top: 16px; left: 28px; pointer-events: none;
  font-family: var(--font-ui); font-weight: 600; font-size: 15.5px; line-height: 1.6;
  color: var(--fg-2);
}
.u2k-panel:nth-child(2) .u2k-textarea-wrap:has(.u2k-editor:placeholder-shown)::after {
  content: "कृति देव आउटपुट यहाँ दिखाई देगा...";
  position: absolute; top: 16px; left: 191px; pointer-events: none;
  font-family: var(--font-deva); font-size: 15.5px; line-height: 1.6; color: var(--fg-2);
}

.u2k-panel-foot { margin: 0; padding: 0; border: 0; min-height: 0; }
.u2k-panel:nth-child(2) .u2k-editor { padding-bottom: 56px; }
.u2k-output-actions {
  position: absolute; left: 50%; transform: translateX(-50%); bottom: 12px; z-index: 2;
  display: flex; flex-wrap: nowrap; gap: 2px;
  padding: 4px 6px; border-radius: var(--pill);
  background: #fff;
  border: 1.5px solid var(--line-2);
  box-shadow: 0 10px 26px -10px rgba(28,37,64,.32);
}

.u2k-output-actions .u2k-tool {
  padding: 6px 9px; white-space: nowrap;
  background: transparent; border-color: transparent; box-shadow: none;
}
.u2k-output-actions .u2k-tool:hover:not(:disabled) { background: var(--surface-2); border-color: transparent; color: var(--ink); }
.u2k-output-actions .u2k-tool:disabled,
.u2k-output-actions .u2k-tool:disabled:hover {
  background: transparent; border-color: transparent; opacity: 1; color: #b4bdc9;
}
.u2k-output-actions .u2k-tool:disabled .u2k-ico { color: #b4bdc9; }
.u2k-output-actions .u2k-tool:not(:disabled) { color: #1d1d20; }
.u2k-output-actions .u2k-tool:not(:disabled) .u2k-ico { color: var(--accent); }
.u2k-counts { display: flex; gap: 18px; font-size: 13px; color: var(--fg-3); }
.u2k-counts b { font-family: var(--font-mono); font-weight: 700; color: var(--ink); font-size: 14px; }

.u2k-page-jumps {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px 14px;
  margin: clamp(16px, 2.4vw, 26px) auto 0;
  padding: 14px 20px; border-radius: var(--pill);
  background: var(--surface-2); border: 1px solid var(--line);
  font-size: 13.5px;
}
.u2k-page-jumps span { color: var(--fg-4); font-weight: 600; }
.u2k-page-jumps a {
  color: var(--fg-2); font-weight: 600;
  transition: color var(--dur) var(--ease);
}
.u2k-page-jumps a:hover { color: var(--accent-deep); }

.u2k-section { padding-top: var(--gap-section); }

.u2k-section, .u2k-footer { content-visibility: auto; contain-intrinsic-size: auto 500px; }
.u2k-section-head { max-width: var(--prose); margin: 0 auto clamp(28px, 4vw, 44px); text-align: center; }
.u2k-kicker {
  display: inline-block; margin-bottom: 14px;
  font-size: 12px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent-deep);
}
.u2k-section-title {
  font-size: clamp(1.7rem, 3.6vw, 2.7rem);
  font-weight: 750; line-height: 1.08; letter-spacing: -0.025em; color: var(--ink);
}
.u2k-section-title .saff, .saff { color: var(--accent); }
.u2k-section-sub {
  margin-top: 16px; font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.65; color: var(--fg-2);
}

.u2k-guide-main h3 { margin-top: 36px; font-size: 1.3rem; font-weight: 700; letter-spacing: -0.02em; color: var(--ink); }
.u2k-guide-main h3:first-child { margin-top: 0; }
.u2k-guide-main p { margin-top: 14px; color: var(--fg-2); line-height: 1.75; }
.u2k-guide-main p b, .u2k-format-options b { color: var(--ink); font-weight: 700; }

.u2k-kb-card {
  display: grid; grid-template-columns: 320px 1fr; gap: clamp(24px, 4vw, 48px);
  padding: clamp(24px, 3vw, 40px);
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-xl); box-shadow: var(--sh-md);
}
.u2k-kb-title { font-size: 1.6rem; font-weight: 750; line-height: 1.1; letter-spacing: -0.02em; }
.u2k-kb-title .saff { color: var(--accent); }
.u2k-kb-card > div > p { margin-top: 14px; color: var(--fg-2); line-height: 1.7; }
.u2k-kb-emphasis { color: var(--ink); font-weight: 600; }
.u2k-kb-toggle { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 20px; }
.u2k-kb-toggle button {
  padding: 8px 14px; border-radius: var(--pill);
  font-size: 13px; font-weight: 600; color: var(--fg-2);
  background: var(--surface-2); border: 1px solid transparent;
  transition: all var(--dur) var(--ease);
}
.u2k-kb-toggle button:hover { color: var(--ink); border-color: var(--line-2); }
.u2k-kb-toggle button.active {
  color: var(--accent-ink); background: linear-gradient(150deg, var(--accent), var(--accent-deep));
}
.u2k-kb-legend { display: flex; gap: 18px; margin-top: 20px; font-size: 12.5px; color: var(--fg-3); }
.u2k-kb-legend span { display: inline-flex; align-items: center; gap: 7px; }
.u2k-kb-legend i { width: 12px; height: 12px; border-radius: 4px; border: 1px solid var(--line-2); }

.u2k-kb-stage { min-width: 0; }
.u2k-kb-pad { border: 1px solid var(--line); border-radius: var(--r-md); padding: 14px; background: var(--bg); margin-bottom: 16px; }
.u2k-kb-pad-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.u2k-kb-pad-kicker { display: block; font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent-deep); }
.u2k-kb-pad-context { display: block; font-size: 12.5px; color: var(--fg-3); font-weight: 500; margin-top: 2px; }
.u2k-kb-pad-actions { display: flex; gap: 6px; }
.u2k-kb-pad-actions button {
  padding: 6px 11px; border-radius: var(--pill); font-size: 12px; font-weight: 600;
  color: var(--fg-2); background: var(--surface-2); border: 1px solid transparent;
  transition: all var(--dur) var(--ease);
}
.u2k-kb-pad-actions button:hover { color: var(--ink); border-color: var(--line-2); }
.u2k-kb-pad-editor {
  width: 100%; border: 0; background: transparent; resize: vertical;
  font-family: var(--font-deva); font-size: 15px; line-height: 1.6; color: var(--ink);
}
.u2k-kb-pad-editor:focus { outline: none; }

.u2k-kb-grid { display: flex; flex-direction: column; gap: 7px; }
.u2k-kb-row { display: flex; gap: 7px; justify-content: center; }
.u2k-kb-row.r2 { padding-left: 28px; }
.u2k-kb-row.r3 { padding-left: 42px; }
.u2k-key {
  position: relative; flex: 0 0 auto; min-width: 54px; height: 60px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border: 1px solid var(--line); border-radius: 14px; padding: 6px 4px;
  background: var(--surface); box-shadow: var(--sh-sm);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.u2k-key:hover { transform: translateY(-1px); border-color: var(--accent-line); box-shadow: var(--sh-md); }
.u2k-key .deva-glyph { font-family: var(--font-deva); font-size: 20px; font-weight: 600; color: var(--ink); line-height: 1; }
.u2k-key .ascii-glyph { font-family: var(--font-mono); font-size: 11px; color: var(--saff); margin-top: 4px; }
.u2k-key--special { min-width: 88px; }
.u2k-key--special .deva-glyph { font-family: var(--font-ui); font-size: 13px; color: var(--fg-3); font-weight: 600; }

.u2k-font-card {
  display: grid; grid-template-columns: 1fr; gap: clamp(24px, 4vw, 40px);
  align-items: center;
  padding: clamp(28px, 4vw, 52px);
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-xl); box-shadow: var(--sh-md);
}
.u2k-font-eyebrow { font-size: 12.5px; color: var(--fg-3); margin-bottom: 14px; letter-spacing: 0.02em; }
.u2k-font-eyebrow b { color: var(--accent-deep); font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; }
.u2k-font-left h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 750; line-height: 1.06; letter-spacing: -0.025em; }
.u2k-font-left > p { margin-top: 16px; color: var(--fg-2); line-height: 1.7; }
.u2k-steps { margin-top: 26px; display: flex; flex-direction: column; gap: 16px; }
.u2k-step { display: flex; gap: 14px; align-items: flex-start; }
.u2k-step .num {
  flex: none; width: 30px; height: 30px; border-radius: var(--pill);
  display: grid; place-items: center; font-size: 14px; font-weight: 800;
  color: var(--accent-deep); background: var(--accent-soft);
}
.u2k-step .step-label { font-weight: 650; color: var(--ink); line-height: 1.4; }
.u2k-step .sub { display: block; font-weight: 400; font-size: 13px; color: var(--fg-3); margin-top: 2px; }
.u2k-install-ctas { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 10px; }

.u2k-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: var(--pill);
  font-size: 14px; font-weight: 650;
  border: 1px solid transparent;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.u2k-btn--primary { color: var(--accent-ink); background: linear-gradient(150deg, var(--accent), var(--accent-deep)); box-shadow: var(--sh-md); }
.u2k-btn--primary:hover { transform: translateY(-2px); box-shadow: var(--sh-lg); }
.u2k-btn--ghost { color: var(--ink); background: var(--surface-2); border-color: var(--line-2); }
.u2k-btn--ghost:hover { background: var(--surface); border-color: var(--fg-4); }

.u2k-font-preview {
  padding: clamp(24px, 3vw, 36px); border-radius: var(--r-lg);
  background: var(--bg-2); border: 1px solid var(--line); text-align: center;
}
.u2k-font-preview .ttl { font-size: 12px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--fg-4); }
.u2k-font-preview .specimen { font-family: var(--font-mono); font-size: clamp(1.8rem, 4vw, 2.6rem); color: var(--ink); margin-top: 18px; }
.u2k-font-preview .specimen-dev { font-family: var(--font-deva); font-size: clamp(1.6rem, 3.5vw, 2.2rem); color: var(--accent); margin-top: 10px; font-weight: 600; }
.u2k-font-preview .meta { margin-top: 18px; display: flex; gap: 8px; justify-content: center; font-size: 12px; color: var(--fg-4); }

.u2k-byline { padding-top: var(--gap-section); font-size: 13.5px; color: var(--fg-3); }
.u2k-byline a { color: var(--accent-deep); font-weight: 600; }
.u2k-byline a:hover { text-decoration: underline; }
.u2k-byline + .u2k-section { padding-top: clamp(36px, 5vw, 56px); }

.u2k-authority-article { max-width: 760px; margin: 0 auto; }
.u2k-authority-article .u2k-section-head { max-width: none; }

.u2k-guide-grid { display: block; }
.u2k-guide-side { margin-top: 28px; }
.u2k-example-media { margin: 28px 0 0; }
.u2k-example-media img { width: 100%; height: auto; border-radius: var(--r-lg); border: 1px solid var(--line); }
.u2k-example-media figcaption { margin-top: 12px; font-size: 13px; color: var(--fg-3); line-height: 1.6; }

.u2k-howto-card, .u2k-content-card {
  margin-top: 28px; padding: clamp(22px, 3vw, 32px);
  background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--r-lg);
}
.u2k-howto-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--ink); }
.u2k-content-card h2 { font-size: 1.3rem; font-weight: 700; letter-spacing: -0.02em; }
.u2k-content-card p { margin-top: 12px; color: var(--fg-2); }
.u2k-ordered { margin: 14px 0 0; padding-left: 20px; }
.u2k-ordered li { margin-top: 10px; color: var(--fg-2); line-height: 1.6; }

.u2k-guide-side {
  position: static;
  padding: clamp(22px, 3vw, 30px);
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  box-shadow: var(--sh-sm);
}
.u2k-guide-side h3 { font-size: 1.1rem; font-weight: 700; color: var(--ink); }
.u2k-format-options { margin-top: 14px; display: flex; flex-direction: column; gap: 12px; }
.u2k-format-options p { font-size: 14px; color: var(--fg-2); line-height: 1.6; }
.u2k-mini-link {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 18px;
  font-size: 14px; font-weight: 650; color: var(--accent-deep);
}
.u2k-mini-link::after { content: "→"; transition: transform var(--dur) var(--ease); }
.u2k-mini-link:hover::after { transform: translateX(3px); }

.u2k-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-lg); }
.u2k-info-table { width: 100%; border-collapse: collapse; min-width: 640px; font-size: 14.5px; }
.u2k-info-table th {
  text-align: left; padding: 16px 18px; background: var(--surface-2);
  font-weight: 700; color: var(--ink); border-bottom: 1px solid var(--line-2);
}
.u2k-info-table td { padding: 16px 18px; color: var(--fg-2); border-bottom: 1px solid var(--line); line-height: 1.55; vertical-align: top; }
.u2k-info-table tbody tr:last-child td { border-bottom: 0; }
.u2k-info-table tbody tr:hover td { background: var(--surface-2); }
.u2k-info-table td:first-child { color: var(--ink); font-weight: 650; }

.u2k-problem-grid, .u2k-workflow-grid {
  display: grid; grid-template-columns: 1fr; gap: 16px;
}
.u2k-problem-card, .u2k-workflow-card {
  padding: clamp(22px, 2.5vw, 30px);
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.u2k-problem-card:hover, .u2k-workflow-card:hover { transform: translateY(-3px); box-shadow: var(--sh-md); border-color: var(--line-2); }
.u2k-problem-card h3, .u2k-workflow-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--ink); letter-spacing: -0.01em; }
.u2k-problem-card p, .u2k-workflow-card p { margin-top: 12px; font-size: 14.5px; color: var(--fg-2); line-height: 1.65; }
.u2k-card-num {
  display: inline-block; margin-bottom: 14px;
  font-size: 13px; font-weight: 800; letter-spacing: 0.04em;
  color: var(--accent); font-variant-numeric: tabular-nums;
}

.u2k-check-card {
  padding: clamp(28px, 4vw, 48px);
  background: linear-gradient(160deg, var(--surface), var(--accent-soft));
  border: 1px solid var(--accent-line); border-radius: var(--r-xl);
}
.u2k-check-list { margin: clamp(24px, 3vw, 32px) 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.u2k-check-list li {
  position: relative; padding-left: 34px; color: var(--fg-2); line-height: 1.6;
}
.u2k-check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  width: 22px; height: 22px; border-radius: var(--pill);
  display: grid; place-items: center; font-size: 12px; font-weight: 800;
  color: var(--accent-ink); background: var(--accent);
}

.u2k-source-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 10px; }
.u2k-source-grid a {
  display: block; padding: 16px 18px;
  background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--r-md);
  font-size: 14px; font-weight: 600; color: var(--fg-2);
  transition: all var(--dur) var(--ease);
}
.u2k-source-grid a:hover { color: var(--accent-deep); border-color: var(--accent-line); background: var(--surface); transform: translateY(-2px); }

.u2k-support-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.u2k-support-card {
  display: block; padding: clamp(22px, 3vw, 30px);
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.u2k-support-card:hover { transform: translateY(-3px); box-shadow: var(--sh-md); border-color: var(--accent-line); }
.u2k-support-card-title { display: block; font-size: 1.1rem; font-weight: 700; color: var(--ink); }
.u2k-support-card-text { display: block; margin-top: 10px; font-size: 14px; color: var(--fg-2); line-height: 1.6; }
.u2k-mini-link-grid { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 16px; }

.u2k-seo-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.u2k-seo-card {
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--surface); padding: clamp(22px, 2.5vw, 30px);
}
.u2k-seo-card h3 { font-family: var(--font-ui); font-weight: 700; color: var(--ink); font-size: 1.1rem; line-height: 1.25; letter-spacing: -0.01em; }
.u2k-seo-card > p { margin-top: 12px; color: var(--fg-2); font-size: 14.5px; line-height: 1.65; }
.u2k-seo-card li { color: var(--fg-2); font-size: 14.5px; line-height: 1.65; }
.u2k-seo-card ul { padding-left: 18px; margin-top: 10px; display: grid; gap: 6px; }
.u2k-seo-card p a, .u2k-seo-card li a { color: var(--accent-deep); font-weight: 600; }
.u2k-seo-card--links { display: flex; flex-direction: column; gap: 12px; }
.u2k-seo-card--links a {
  display: flex; justify-content: space-between; gap: 12px;
  color: var(--accent-deep); font-weight: 650; text-decoration: none;
}
.u2k-seo-card--links a:hover { text-decoration: underline; text-underline-offset: 3px; }
.u2k-seo-card--links a span { color: var(--fg-4); font-weight: 500; font-size: 12px; white-space: nowrap; }

.u2k-faq-list { margin-top: 8px; border-top: 1px solid var(--line); }
.u2k-faq-item { padding: clamp(20px, 2.5vw, 28px) 0; border-bottom: 1px solid var(--line); }
.u2k-faq-q { font-size: 1.15rem; font-weight: 700; color: var(--ink); letter-spacing: -0.015em; }
.u2k-faq-a { margin-top: 12px; color: var(--fg-2); line-height: 1.75; }
.u2k-faq-a b { color: var(--ink); font-weight: 700; }

.u2k-back-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 60;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 16px; border-radius: var(--pill);
  color: var(--accent-ink); background: linear-gradient(150deg, var(--accent), var(--accent-deep));
  border: 0; box-shadow: var(--sh-lg);
  opacity: 0; transform: translateY(12px); pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.u2k-back-top[data-visible], .u2k-back-top.is-visible, .u2k-back-top:not([aria-hidden="true"]) {
  opacity: 1; transform: none; pointer-events: auto;
}
.u2k-back-top-icon svg { width: 16px; height: 16px; }
.u2k-back-top-label { font-size: 13px; font-weight: 650; }

.u2k-footer {
  margin-top: var(--gap-section);
  background: var(--ink); color: oklch(0.9 0.01 265);
}
.u2k-footer-inner {
  max-width: var(--max); margin: 0 auto;
  padding: clamp(48px, 6vw, 72px) var(--pad-x) clamp(32px, 4vw, 44px);
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px;
}
.u2k-footer .u2k-brand-name { color: #fff; }
.u2k-footer .u2k-brand-name .tld { color: oklch(0.7 0.01 265); }
.u2k-footer-tagline { margin-top: 16px; max-width: 320px; font-size: 14px; line-height: 1.6; color: oklch(0.72 0.012 265); }
.u2k-footer-tagline b { color: #fff; font-weight: 700; }
.u2k-footer-heading { font-size: 12px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: oklch(0.62 0.012 265); margin-bottom: 16px; }
.u2k-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.u2k-footer ul a { font-size: 14px; color: oklch(0.82 0.01 265); transition: color var(--dur) var(--ease); }
.u2k-footer ul a:hover { color: #fff; }
.u2k-footer-bottom {
  max-width: var(--max); margin: 0 auto;
  padding: 22px var(--pad-x); border-top: 1px solid oklch(0.4 0.02 265);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px;
  font-size: 13px; color: oklch(0.68 0.012 265);
}
.u2k-flag { display: inline-flex; align-items: center; gap: 8px; }
.u2k-flag i { width: 14px; height: 9px; border-radius: 2px; }
.u2k-flag .b1 { background: oklch(0.68 0.17 50); }
.u2k-flag .b2 { background: #fff; }
.u2k-flag .b3 { background: var(--green); }

@keyframes u2k-rise {
  from { transform: translateY(16px); }
  to   { transform: none; }
}

@media (max-width: 900px) {
  .u2k-panels { grid-template-columns: 1fr; }
  .u2k-panel:first-child { border-right: 0; border-bottom: 1px solid var(--line); }
  .u2k-kb-card { grid-template-columns: 1fr; }
  .u2k-guide-grid { grid-template-columns: 1fr; }
  .u2k-guide-side { position: static; }
  .u2k-font-card { grid-template-columns: 1fr; }
  .u2k-footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 720px) {
  .u2k-hero h1, .u2k-hero-answer { white-space: normal; }
}
@media (max-width: 560px) {
  .u2k-nav-links { display: none; }
  .u2k-footer-inner { grid-template-columns: 1fr; }
  .u2k-back-top-label { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}