/* Zenter-aligned UI for CodeTest */

:root {
  --bg: #f8fafc;
  --bg-soft: #f1f5f9;
  --surface: #ffffff;
  --surface-tint: #f8fbff;
  --ink: #0f172a;
  --ink-2: #334155;
  --ink-3: #64748b;
  --ink-4: #94a3b8;
  --border: #e2e8f0;
  --border-soft: #edf2f7;

  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1e40af;
  --accent: #10b981;
  --accent-dark: #059669;
  --danger: #ef4444;
  --warning: #f59e0b;

  --radius: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --gradient-primary: linear-gradient(135deg, #1e40af 0%, #2563eb 55%, #60a5fa 100%);
  --gradient-accent: linear-gradient(135deg, #059669, #10b981);
  --gradient-soft: linear-gradient(180deg, #ffffff, #f8fbff);

  --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 60px rgba(37, 99, 235, 0.14);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  width: 100%;
  height: 100%;
  min-height: 100vh;
  font-family: 'DM Sans', system-ui, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 0% 0%, rgba(37, 99, 235, 0.1), transparent 38%),
    radial-gradient(circle at 95% 8%, rgba(16, 185, 129, 0.11), transparent 34%),
    var(--bg);
  line-height: 1.55;
  overflow: hidden;
}

.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(148, 163, 184, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.14) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: radial-gradient(circle at center, rgba(0, 0, 0, 0.75), transparent 80%);
}

.scanline {
  display: none;
}

@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.2;
  }
}

@keyframes rise {
  from {
    transform: translateY(12px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes pulse-ring {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.15);
  }

  50% {
    box-shadow: 0 0 0 9px rgba(37, 99, 235, 0);
  }
}

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

@keyframes bg-scroll {
  from {
    transform: translateY(-50%) translateX(0);
  }

  to {
    transform: translateY(-50%) translateX(-30%);
  }
}

/* Landing */
.landing-body {
  height: 100dvh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.landing-wrap {
  --fit-scale: 1;
  position: relative;
  z-index: 1;
  width: min(96vw, 1360px);
  max-width: 1360px;
  margin: 0 auto;
  padding: clamp(16px, 3vh, 46px) clamp(14px, 2.7vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  align-items: center;
  gap: clamp(28px, 3vw, 56px);
  transform: scale(var(--fit-scale));
  transform-origin: center center;
}

.hero-watermark {
  position: absolute;
  top: 50%;
  left: -10%;
  right: -10%;
  transform: translateY(-50%);
  font-family: 'Plus Jakarta Sans', 'DM Sans', sans-serif;
  font-size: clamp(56px, 8vw, 130px);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(15, 23, 42, 0.08);
  white-space: nowrap;
  pointer-events: none;
  animation: bg-scroll 35s linear infinite;
}

.landing-left,
.landing-right {
  position: relative;
  min-width: 0;
  z-index: 1;
  animation: rise 0.55s ease-out both;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 30px;
  font-family: 'Plus Jakarta Sans', 'DM Sans', sans-serif;
}

.logo-bracket {
  font-size: 1.86rem;
  font-weight: 700;
  color: var(--primary);
}

.logo-text {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.landing-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink-3);
  font-size: 12px;
  font-weight: 600;
  padding: 7px 13px;
  margin-bottom: 14px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-primary);
  box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.12);
}

.landing-hero-title {
  max-width: 620px;
  font-family: 'Plus Jakarta Sans', 'DM Sans', sans-serif;
  font-size: clamp(2rem, 4.8vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -0.04em;
  color: var(--ink);
  margin-bottom: 14px;
}

.landing-hero-title .gradient-word {
  display: block;
  background: linear-gradient(95deg, #1e40af, #2563eb, #60a5fa);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.landing-hero-copy {
  max-width: 540px;
  color: var(--ink-3);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 18px;
}

.terminal-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  margin-bottom: 24px;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-soft);
  background: linear-gradient(180deg, #ffffff, #f9fbff);
}

.t-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.t-red {
  background: #fb7185;
}

.t-yellow {
  background: #f59e0b;
}

.t-green {
  background: #22c55e;
}

.t-title {
  margin-left: 8px;
  color: var(--ink-3);
  font-size: 12px;
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-weight: 600;
}

.terminal-body {
  padding: 18px 20px 20px;
  font-family: 'Fira Code', monospace;
  font-size: 12px;
  line-height: 1.9;
  background: linear-gradient(180deg, #f9fbff, #f5f9ff);
}

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

.t-prompt {
  color: var(--accent-dark);
  font-weight: 700;
}

.t-cmd {
  color: var(--primary);
}

.t-arg {
  color: #0ea5e9;
}

.t-out {
  padding-left: 18px;
  color: var(--ink-3);
}

.t-cursor {
  display: inline-block;
  width: 8px;
  height: 14px;
  background: var(--primary);
  border-radius: 2px;
  animation: blink 0.9s infinite;
}

.feature-list {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(226, 232, 240, 0.75);
}

.f-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-top: 6px;
  background: var(--gradient-primary);
  flex-shrink: 0;
}

.f-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.f-desc {
  margin-top: 1px;
  font-size: 12px;
  color: var(--ink-3);
}

.lang-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.landing-stats {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 22px;
}

.ls-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ls-value {
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  background: linear-gradient(120deg, var(--ink), var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.ls-label {
  color: var(--ink-4);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.ls-divider {
  width: 1px;
  height: 34px;
  background: var(--border);
}

.lang-badge {
  border: 1px solid;
  border-radius: var(--radius-pill);
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
}

.lang-badge.python {
  color: #1d4ed8;
  border-color: rgba(29, 78, 216, 0.2);
  background: rgba(29, 78, 216, 0.08);
}

.lang-badge.cpp {
  color: #0f766e;
  border-color: rgba(15, 118, 110, 0.22);
  background: rgba(15, 118, 110, 0.09);
}

.lang-badge.c {
  color: #334155;
  border-color: rgba(51, 65, 85, 0.2);
  background: rgba(148, 163, 184, 0.12);
}

.lang-badge.java {
  color: #c2410c;
  border-color: rgba(194, 65, 12, 0.22);
  background: rgba(251, 146, 60, 0.12);
}

.form-card {
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 34px;
  background: var(--gradient-soft);
  box-shadow: var(--shadow-lg);
}

.form-kicker {
  font-size: 11px;
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  margin-bottom: 10px;
}

.form-card-header {
  margin-bottom: 20px;
}

.form-card-header h2 {
  font-size: clamp(1.4rem, 2.2vw, 2rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-family: 'Plus Jakarta Sans', 'DM Sans', sans-serif;
  color: var(--ink);
}

.form-card-header p {
  margin-top: 8px;
  color: var(--ink-3);
  font-size: 14px;
}

.error-alert {
  margin-bottom: 16px;
  padding: 10px 12px;
  font-size: 13px;
  border-radius: 10px;
  border: 1px solid rgba(239, 68, 68, 0.34);
  color: #b91c1c;
  background: rgba(254, 226, 226, 0.75);
}

.field-group {
  margin-bottom: 14px;
}

.field-group label {
  display: block;
  margin-bottom: 7px;
  color: var(--ink-3);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.req {
  color: var(--danger);
}

.opt {
  color: var(--ink-4);
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
}

.field-group input {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--ink);
  font-size: 14px;
  padding: 11px 13px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field-group input::placeholder {
  color: var(--ink-4);
}

.field-group input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.14);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.test-info-box {
  margin: 18px 0;
  padding: 12px 14px;
  border: 1px solid rgba(37, 99, 235, 0.16);
  border-radius: 14px;
  background: rgba(239, 246, 255, 0.9);
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.info-row-item {
  font-size: 12px;
  color: var(--primary-dark);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.consent-row {
  margin-bottom: 20px;
}

.check-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  color: var(--ink-3);
  font-size: 13px;
}

.check-label input {
  display: none;
}

.checkmark {
  width: 19px;
  min-width: 19px;
  height: 19px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  margin-top: 1px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.check-label input:checked + .checkmark {
  background: var(--primary);
  border-color: var(--primary);
}

.check-label input:checked + .checkmark::after {
  content: '✓';
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

.btn-begin {
  width: 100%;
  border: none;
  border-radius: 14px;
  padding: 13px 14px;
  color: #fff;
  background: var(--gradient-primary);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.28);
}

.btn-begin:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.34);
}

.btn-begin:disabled {
  opacity: 0.72;
  cursor: not-allowed;
}

.form-rules {
  margin-top: 16px;
  display: grid;
  gap: 4px;
}

.form-rules div {
  font-size: 12px;
  color: var(--ink-4);
}

/* Test */
.test-body {
  overflow: hidden;
  height: 100vh;
}

.test-header {
  position: sticky;
  top: 0;
  z-index: 200;
  height: 64px;
  min-height: 64px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.hdr-left,
.hdr-right {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.hdr-left {
  flex: 1 1 auto;
}

.hdr-center {
  flex: 0 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}

.hdr-right {
  flex: 0 1 auto;
  justify-content: flex-end;
}

.logo-sm {
  font-family: 'Plus Jakarta Sans', 'DM Sans', sans-serif;
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.logo-sm span {
  color: var(--primary);
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.brand-subtitle {
  font-size: 10px;
  color: var(--ink-4);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-weight: 700;
  white-space: nowrap;
}

.candidate-chip {
  max-width: 200px;
  flex-shrink: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(37, 99, 235, 0.18);
  background: rgba(239, 246, 255, 0.92);
  color: var(--primary-dark);
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 700;
}

.q-nav-bar {
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}

.q-nav-bar::-webkit-scrollbar {
  display: none;
}

.q-nav-btn {
  width: 33px;
  height: 30px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink-3);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.q-nav-btn:hover {
  border-color: rgba(37, 99, 235, 0.48);
  color: var(--primary);
}

.q-nav-btn.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.q-nav-btn.solved {
  border-color: rgba(16, 185, 129, 0.5);
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-dark);
}

.q-nav-btn.attempted {
  border-color: rgba(245, 158, 11, 0.5);
  background: rgba(245, 158, 11, 0.12);
  color: #b45309;
}

.timer-wrap {
  border-radius: 11px;
  border: 1px solid var(--border);
  background: #fff;
  padding: 7px 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-weight: 700;
  font-size: 14px;
  color: var(--ink-2);
}

.timer-wrap.warning {
  border-color: rgba(245, 158, 11, 0.46);
  color: #b45309;
}

.timer-wrap.critical {
  border-color: rgba(239, 68, 68, 0.46);
  color: #b91c1c;
  animation: pulse-ring 1s infinite;
}

.btn-submit-final {
  border: none;
  border-radius: 11px;
  padding: 8px 14px;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  background: var(--gradient-accent);
  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.26);
  transition: transform 0.2s;
}

.btn-submit-final:hover {
  transform: translateY(-1px);
}

.test-layout {
  height: calc(100vh - 64px);
  display: flex;
  overflow: hidden;
  min-height: 0;
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.84), rgba(241, 245, 249, 0.84));
}

.problem-panel {
  width: 430px;
  min-width: 280px;
  max-width: 660px;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  min-height: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
}

.problem-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 20px 24px 14px;
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.prob-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.prob-num {
  font-size: 11px;
  color: var(--ink-4);
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-weight: 700;
}

.prob-diff {
  font-size: 11px;
  font-weight: 700;
  border-radius: var(--radius-pill);
  padding: 3px 10px;
}

.prob-diff.Easy {
  color: var(--accent-dark);
  background: rgba(16, 185, 129, 0.14);
}

.prob-diff.Intermediate,
.prob-diff.Medium {
  color: #b45309;
  background: rgba(245, 158, 11, 0.14);
}

.prob-diff.Hard {
  color: #b91c1c;
  background: rgba(239, 68, 68, 0.13);
}

.prob-cat {
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  background: var(--bg-soft);
  color: var(--ink-3);
  font-size: 11px;
  font-weight: 700;
}

.prob-title {
  font-family: 'Plus Jakarta Sans', 'DM Sans', sans-serif;
  color: var(--ink);
  font-size: 1.13rem;
  line-height: 1.3;
}

.prob-body {
  padding: 4px 24px 24px;
}

.prob-section {
  margin-top: 18px;
}

.prob-section-title {
  margin-bottom: 7px;
  color: var(--ink-4);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.prob-text {
  color: var(--ink-2);
  font-size: 14px;
  white-space: pre-wrap;
}

.prob-mono {
  font-family: 'Fira Code', monospace;
  font-size: 12px;
}

.sample-case {
  border: 1px solid var(--border);
  background: var(--surface-tint);
  border-radius: 12px;
  padding: 11px 12px;
  margin-bottom: 10px;
}

.sample-label {
  margin-bottom: 6px;
  color: var(--ink-4);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.sample-row {
  display: flex;
  gap: 10px;
}

.sample-col {
  flex: 1;
}

.sample-key {
  color: var(--ink-4);
  font-size: 11px;
  margin-bottom: 4px;
}

.sample-val {
  border-radius: 9px;
  background: #fff;
  border: 1px solid var(--border-soft);
  color: var(--ink-2);
  font-size: 12px;
  padding: 6px 8px;
  white-space: pre-wrap;
}

.sample-io {
  font-family: 'Fira Code', monospace;
}

.sample-exp {
  margin-top: 8px;
  color: var(--ink-3);
  font-size: 12px;
  font-style: italic;
}

.panel-divider {
  width: 4px;
  background: var(--border);
  cursor: col-resize;
  transition: background-color 0.2s;
}

.panel-divider:hover {
  background: rgba(37, 99, 235, 0.5);
}

.editor-panel {
  flex: 1;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.editor-toolbar {
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(8px);
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-select {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink-2);
  border-radius: 10px;
  padding: 7px 10px;
  font-size: 13px;
  font-weight: 600;
  outline: none;
}

.lang-select:focus {
  border-color: var(--primary-light);
}

.btn-toolbar {
  border-radius: 10px;
  border: 1px solid;
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: transform 0.18s, background-color 0.18s;
}

.btn-toolbar:hover {
  transform: translateY(-1px);
}

.btn-reset {
  border-color: var(--border);
  background: #fff;
  color: var(--ink-3);
}

.btn-run {
  border-color: rgba(37, 99, 235, 0.35);
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-dark);
}

.btn-validate {
  border-color: rgba(16, 185, 129, 0.35);
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-dark);
}

.autosave-indicator {
  color: var(--accent-dark);
  font-size: 11px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

#monacoEditor {
  background: #ffffff;
  flex: 1 1 auto;
  min-height: 260px;
  height: auto !important;
}

.io-panel {
  flex-shrink: 0;
  height: 210px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
  background: #fff;
}

.io-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: #fbfdff;
}

.io-tab {
  border: none;
  border-bottom: 2px solid transparent;
  padding: 9px 16px;
  background: transparent;
  color: var(--ink-3);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.io-tab:hover {
  color: var(--ink-2);
}

.io-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.io-content {
  flex: 1;
  overflow: auto;
}

#customInput {
  width: 100%;
  height: 100%;
  border: none;
  outline: none;
  resize: none;
  background: #fff;
  color: var(--ink-2);
  padding: 12px 14px;
  font-family: 'Fira Code', monospace;
  font-size: 12px;
}

#customInput::placeholder {
  color: var(--ink-4);
}

.output-area {
  min-height: 100%;
  white-space: pre-wrap;
  padding: 12px 14px;
  font-family: 'Fira Code', monospace;
  font-size: 12px;
  line-height: 1.65;
  color: var(--ink-3);
}

.output-area.success {
  color: #0f766e;
}

.output-area.error {
  color: #b91c1c;
}

.output-area.timeout {
  color: #b45309;
}

.tc-result {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-soft);
  font-size: 13px;
}

.tc-result.pass {
  background: rgba(16, 185, 129, 0.08);
}

.tc-result.fail {
  background: rgba(239, 68, 68, 0.07);
}

.tc-icon {
  flex-shrink: 0;
  font-size: 15px;
}

.tc-info {
  flex: 1;
}

.tc-label {
  margin-bottom: 3px;
  font-weight: 700;
  color: var(--ink-2);
}

.tc-detail {
  color: var(--ink-3);
  font-family: 'Fira Code', monospace;
  font-size: 11px;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.36);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal-box {
  width: min(92%, 460px);
  border-radius: 20px;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow-lg);
  padding: 30px;
  text-align: center;
  transform: translateY(8px) scale(0.98);
  transition: transform 0.22s ease;
}

.modal-overlay.open .modal-box {
  transform: translateY(0) scale(1);
}

.modal-title-row {
  font-size: 11px;
  color: var(--ink-4);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 700;
  margin-bottom: 4px;
}

.modal-box h3 {
  font-family: 'Plus Jakarta Sans', 'DM Sans', sans-serif;
  font-size: 1.3rem;
  margin-bottom: 14px;
}

.modal-summary {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 14px;
}

.ms-item {
  text-align: center;
}

.ms-val {
  font-size: 1.65rem;
  line-height: 1;
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-weight: 700;
}

.ms-lbl {
  margin-top: 4px;
  font-size: 10px;
  color: var(--ink-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.modal-warn {
  color: var(--ink-3);
  font-size: 13px;
  margin-bottom: 18px;
}

.modal-btns {
  display: flex;
  gap: 10px;
}

.btn-modal-cancel,
.btn-modal-go {
  flex: 1;
  padding: 10px;
  border-radius: 11px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.btn-modal-cancel {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink-3);
}

.btn-modal-go {
  border: none;
  color: #fff;
  background: var(--gradient-primary);
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.32);
  backdrop-filter: blur(2px);
}

.loading-overlay.show {
  display: flex;
}

.loading-box {
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow-md);
  padding: 20px 26px;
  text-align: center;
  color: var(--ink-3);
  font-size: 14px;
}

.spinner {
  width: 30px;
  height: 30px;
  margin: 0 auto 10px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  animation: spin 0.8s linear infinite;
}

/* Result */
.result-body {
  height: 100dvh;
  overflow: hidden;
}

.result-wrap {
  --fit-scale: 1;
  position: relative;
  z-index: 1;
  height: 100%;
  max-height: 100%;
  max-width: 940px;
  margin: 0 auto;
  padding: 22px 22px 18px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(var(--fit-scale));
  transform-origin: top center;
}

.result-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  color: var(--ink-3);
  font-size: 14px;
}

.score-hero {
  padding: 40px 24px;
  border-radius: 24px;
  border: 1px solid var(--border);
  text-align: center;
  margin-bottom: 20px;
  box-shadow: var(--shadow-md);
  background: #fff;
}

.hero-excellent {
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.09), #ffffff 70%);
}

.hero-good {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.09), #ffffff 70%);
}

.hero-average {
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.1), #ffffff 70%);
}

.hero-poor {
  background: linear-gradient(180deg, rgba(239, 68, 68, 0.09), #ffffff 70%);
}

.score-ring-wrap {
  display: inline-block;
  position: relative;
  margin-bottom: 10px;
}

.score-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.score-arc {
  stroke: var(--primary);
}

.score-pct {
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--ink);
}

.score-lbl {
  font-size: 10px;
  color: var(--ink-4);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.score-msg {
  color: var(--ink-3);
  font-size: 1rem;
}

.score-name {
  margin-top: 6px;
  font-size: 1.16rem;
  font-weight: 700;
  color: var(--ink);
}

.res-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.res-stat {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
  padding: 18px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.rs-val {
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 2px;
  color: var(--ink);
}

.rs-lbl {
  font-size: 10px;
  color: var(--ink-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.res-stat.accepted .rs-val {
  color: #0f766e;
}

.res-stat.wrong .rs-val {
  color: #b91c1c;
}

.res-stat.time .rs-val {
  color: var(--primary-dark);
  font-size: 1.15rem;
}

.res-section {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
  padding: 24px;
  box-shadow: var(--shadow-sm);
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.res-section-title {
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-soft);
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

#submissionsBreakdown {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding-right: 4px;
}

.sub-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 12px;
}

.sub-card-header {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-soft);
  background: #fbfdff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.sub-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sub-num {
  color: var(--ink-4);
  font-size: 11px;
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-weight: 700;
}

.sub-title {
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 700;
}

.sub-lang {
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink-3);
  padding: 3px 8px;
  font-size: 10px;
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-weight: 700;
}

.sub-status {
  font-size: 12px;
  font-weight: 700;
}

.sub-code {
  margin: 0;
  max-height: 240px;
  overflow: auto;
  background: #f8fafc;
  color: var(--ink-2);
  padding: 12px 14px;
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.sub-error {
  border-top: 1px solid rgba(239, 68, 68, 0.2);
  background: rgba(254, 226, 226, 0.7);
  color: #b91c1c;
  padding: 10px 14px;
  font-size: 11px;
  font-family: 'Fira Code', monospace;
  white-space: pre-wrap;
}

.res-footer {
  text-align: center;
  margin-top: 14px;
  color: var(--ink-3);
  font-size: 14px;
  flex-shrink: 0;
}

.btn-home {
  display: inline-block;
  margin-top: 12px;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid rgba(37, 99, 235, 0.3);
  background: rgba(239, 246, 255, 0.9);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
  padding: 9px 20px;
  transition: all 0.2s;
}

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

.result-cta {
  margin-top: 14px;
  border-radius: 22px;
  background: #0f172a;
  color: #fff;
  padding: 34px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.result-cta::before {
  content: '';
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.22);
  filter: blur(50px);
  top: -170px;
  right: -120px;
}

.result-cta::after {
  content: '';
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.14);
  filter: blur(56px);
  bottom: -180px;
  left: -90px;
}

.result-cta h3 {
  position: relative;
  z-index: 1;
  font-family: 'Plus Jakarta Sans', 'DM Sans', sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  letter-spacing: -0.03em;
  margin-bottom: 10px;
}

.result-cta p {
  position: relative;
  z-index: 1;
  color: rgba(255, 255, 255, 0.75);
  max-width: 640px;
  margin: 0 auto 18px;
}

.result-cta-actions {
  position: relative;
  z-index: 1;
}

.btn-home-dark {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.btn-home-dark:hover {
  border-color: rgba(255, 255, 255, 0.42);
}

@media (max-width: 1024px) {
  .landing-wrap {
    grid-template-columns: 1fr;
    gap: 24px;
    width: min(96vw, 920px);
    padding-top: 34px;
    padding-bottom: 28px;
  }

  .hero-watermark {
    display: none;
  }

  .terminal-card {
    margin-bottom: 18px;
  }

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

@media (max-height: 900px) {
  .landing-wrap {
    padding-top: 22px;
    padding-bottom: 22px;
    gap: 20px;
  }

  .landing-hero-title {
    font-size: clamp(1.6rem, 3.2vw, 2.8rem);
    margin-bottom: 10px;
  }

  .landing-hero-copy {
    margin-bottom: 12px;
    line-height: 1.55;
  }

  .terminal-card {
    margin-bottom: 12px;
  }

  .feature-list {
    gap: 6px;
    margin-bottom: 10px;
  }

  .form-card {
    padding: 20px;
  }

  .field-group {
    margin-bottom: 10px;
  }

  .form-rules {
    margin-top: 10px;
  }

  .score-hero {
    padding: 22px 18px;
    margin-bottom: 12px;
  }

  .res-stats {
    gap: 8px;
    margin-bottom: 12px;
  }

  .res-section {
    padding: 14px;
  }

  .res-footer {
    margin-top: 10px;
  }

  .result-cta {
    margin-top: 10px;
    padding: 22px 18px;
  }
}

@media (max-width: 820px) {
  .hdr-center {
    display: none;
  }

  .test-layout {
    flex-direction: column;
    height: auto;
    min-height: calc(100vh - 64px);
  }

  .problem-panel {
    width: 100%;
    max-width: none;
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 42vh;
  }

  .panel-divider {
    display: none;
  }

  #monacoEditor {
    min-height: 300px;
  }

  .io-panel {
    height: 230px;
  }
}

@media (max-width: 640px) {
  .landing-wrap {
    padding: 22px 14px 34px;
  }

  .form-card {
    padding: 22px;
  }

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

  .test-header {
    flex-wrap: nowrap;
    align-items: center;
    height: 56px;
    min-height: 56px;
    padding: 0 8px;
  }

  .hdr-right {
    width: auto;
    justify-content: flex-end;
  }

  .hdr-left {
    min-width: 0;
  }

  .candidate-chip {
    display: none;
  }

  .brand-subtitle {
    display: none;
  }

  .hdr-right {
    gap: 6px;
  }

  .btn-submit-final {
    padding: 7px 10px;
    font-size: 12px;
  }

  .landing-stats {
    gap: 8px;
  }

  .ls-divider {
    display: none;
  }

  .problem-panel {
    display: none;
  }

  .test-layout {
    height: calc(100vh - 56px);
    min-height: 0;
  }

  #monacoEditor {
    min-height: 260px;
  }

  .res-stats {
    grid-template-columns: 1fr;
  }

  .score-hero {
    padding: 30px 14px;
  }
}