:root {
  --bg: #08111f;
  --bg-elevated: rgba(12, 25, 43, 0.86);
  --surface: rgba(19, 35, 58, 0.82);
  --surface-strong: #122743;
  --border: rgba(146, 179, 221, 0.18);
  --text: #f4f8ff;
  --muted: #b1c1d9;
  --accent: #5eead4;
  --accent-strong: #2dd4bf;
  --accent-soft: rgba(94, 234, 212, 0.14);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --container: 1180px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(45, 212, 191, 0.2), transparent 28%),
    radial-gradient(circle at 85% 15%, rgba(56, 189, 248, 0.16), transparent 22%),
    linear-gradient(180deg, #07101c 0%, #091524 45%, #06101a 100%);
  min-height: 100vh;
}

img {
  max-width: 100%;
  display: block;
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-shell {
  position: relative;
  overflow: hidden;
}

.page-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.35), transparent 85%);
  pointer-events: none;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 1.25rem 0;
  backdrop-filter: blur(18px);
  background: rgba(6, 16, 26, 0.52);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
}

.brand-mark {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border-radius: 16px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  color: #052b2e;
  background: linear-gradient(135deg, #8bf3e1 0%, #60a5fa 100%);
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.22);
}

.brand-text {
  display: grid;
  gap: 0.15rem;
  line-height: 1;
}

.brand-text strong {
  font-size: 0.98rem;
  letter-spacing: -0.02em;
}

.brand-text span {
  color: var(--muted);
  font-size: 0.82rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.96rem;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  transition: color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-1px);
}

.hero-section {
  padding: 4rem 0 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
  gap: 2rem;
  align-items: center;
}

.hero-copy,
.hero-panel,
.feature-card,
.value-card {
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-flex;
  margin: 0 0 1rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid rgba(94, 234, 212, 0.18);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin: 0;
  max-width: 11ch;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2.8rem, 6vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: -0.06em;
}

.hero-text {
  max-width: 62ch;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.5rem;
  padding: 0.95rem 1.4rem;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  color: #04191a;
  background: linear-gradient(135deg, #8bf3e1 0%, #5eead4 45%, #67e8f9 100%);
  box-shadow: 0 18px 40px rgba(35, 186, 176, 0.24);
}

.btn-secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

.hero-highlights li {
  padding: 0.85rem 1rem;
  border-radius: 999px;
  color: #d4e3f5;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.92rem;
}

.hero-panel {
  display: grid;
  gap: 1rem;
}

.panel-card {
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(16, 34, 56, 0.9), rgba(11, 22, 38, 0.94));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.panel-main {
  min-height: 26rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.panel-label {
  margin: 0;
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 700;
}

.panel-main h2 {
  margin: 1rem 0 0;
  max-width: 12ch;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

.panel-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.panel-stats div {
  padding: 1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.panel-stats span {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 2rem;
  font-weight: 700;
}

.panel-stats p,
.panel-mini p,
.panel-mini span,
.section-heading p,
.feature-card p,
.value-card p {
  margin: 0;
  color: var(--muted);
}

.panel-mini p {
  color: var(--text);
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.features-section {
  padding: 3rem 0;
}

.section-heading {
  max-width: 46rem;
  margin-bottom: 2rem;
}

.section-heading h2,
.value-card h2 {
  margin: 0 0 0.9rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2rem, 3vw, 3rem);
  letter-spacing: -0.05em;
  line-height: 1.08;
}

.section-heading p,
.value-card p {
  line-height: 1.8;
  font-size: 1rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.6rem;
  min-height: 18rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(18, 39, 67, 0.9), rgba(11, 21, 36, 0.92));
  border: 1px solid var(--border);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.2);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.feature-card:hover,
.feature-card:focus-within {
  transform: translateY(-8px);
  border-color: rgba(94, 234, 212, 0.32);
  box-shadow: 0 26px 50px rgba(0, 0, 0, 0.28);
}

.feature-icon {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: var(--accent);
  background: rgba(94, 234, 212, 0.1);
  border: 1px solid rgba(94, 234, 212, 0.16);
  font-weight: 700;
}

.feature-card h3 {
  margin: 0;
  font-size: 1.3rem;
}

.feature-card p {
  line-height: 1.75;
}

.feature-link {
  margin-top: auto;
  width: fit-content;
  color: var(--accent);
  font-weight: 700;
}

.feature-link:hover,
.feature-link:focus-visible {
  color: #9af7eb;
}

.value-section {
  padding: 0 0 5rem;
}

.value-card {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: start;
  padding: 2rem;
  border-radius: calc(var(--radius-lg) + 4px);
  background: linear-gradient(180deg, rgba(17, 36, 62, 0.92), rgba(10, 21, 36, 0.96));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.tool-page {
  padding: 2.25rem 0 5rem;
}

.tool-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.25rem;
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}

.tool-page-header h1 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2.4rem, 4.5vw, 4rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

.tool-page-header p {
  margin: 1rem 0 0;
  max-width: 58ch;
  color: var(--muted);
  line-height: 1.8;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.1rem;
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.back-link:hover,
.back-link:focus-visible {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(94, 234, 212, 0.24);
}

.tool-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
  gap: 1.25rem;
  position: relative;
  z-index: 1;
}

.tool-card {
  padding: 1.75rem;
  border-radius: calc(var(--radius-lg) + 2px);
  background: linear-gradient(180deg, rgba(16, 34, 56, 0.9), rgba(10, 20, 35, 0.96));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.tool-card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.tool-card-title h2,
.tool-card-title h3 {
  margin: 0;
  font-size: 1.35rem;
}

.tool-card-title p {
  margin: 0.45rem 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid rgba(94, 234, 212, 0.18);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  white-space: nowrap;
}

.tool-stack {
  display: grid;
  gap: 1rem;
}

.tool-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.metric-card,
.mini-panel,
.list-item,
.empty-state,
.result-card,
.task-row {
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.metric-card span,
.result-number {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

.metric-card p,
.mini-panel p,
.list-item p,
.empty-state p,
.result-card p,
.task-row p,
.field-hint,
.subject-meta {
  margin: 0.45rem 0 0;
  color: var(--muted);
  line-height: 1.7;
}

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

.field-group {
  display: grid;
  gap: 0.55rem;
}

.field-group label {
  font-size: 0.92rem;
  color: #d5e3f5;
  font-weight: 600;
}

.field-group input,
.field-group select,
.tool-textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
  background: rgba(3, 11, 20, 0.55);
  color: var(--text);
  font: inherit;
  padding: 1rem 1rem;
  outline: none;
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.field-group input::placeholder,
.tool-textarea::placeholder {
  color: #7f95b4;
}

.field-group input:focus,
.field-group select:focus,
.tool-textarea:focus {
  border-color: rgba(94, 234, 212, 0.35);
  box-shadow: 0 0 0 4px rgba(94, 234, 212, 0.08);
}

.tool-textarea {
  min-height: 19rem;
  resize: vertical;
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.btn-ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.btn-outline {
  color: var(--accent);
  background: transparent;
  border: 1px solid rgba(94, 234, 212, 0.22);
}

.btn-ghost:hover,
.btn-outline:hover,
.btn-ghost:focus-visible,
.btn-outline:focus-visible {
  box-shadow: 0 16px 35px rgba(0, 0, 0, 0.18);
}

.list-stack {
  display: grid;
  gap: 0.85rem;
}

.list-item,
.task-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.list-item strong,
.task-row strong,
.result-card strong {
  font-size: 1rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  background: rgba(96, 165, 250, 0.12);
  color: #9cc9ff;
  border: 1px solid rgba(96, 165, 250, 0.18);
  font-size: 0.82rem;
  font-weight: 700;
}

.task-content {
  min-width: 0;
}

.task-delete {
  min-height: auto;
  padding: 0.8rem 1rem;
  white-space: nowrap;
}

.is-hidden {
  display: none;
}

.empty-state {
  min-height: 12rem;
  display: grid;
  place-items: center;
  text-align: center;
}

.empty-state strong {
  display: block;
  font-size: 1.05rem;
}

.result-card {
  display: grid;
  gap: 0.45rem;
}

.aside-stack {
  display: grid;
  gap: 1rem;
}

.aside-list {
  display: grid;
  gap: 0.8rem;
}

.aside-list li {
  color: var(--muted);
  line-height: 1.7;
}

.timer-display {
  padding: 1.5rem;
  border-radius: calc(var(--radius-lg) + 4px);
  background:
    radial-gradient(circle at top, rgba(94, 234, 212, 0.18), transparent 48%),
    rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(94, 234, 212, 0.16);
  text-align: center;
}

.timer-display span {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(4rem, 10vw, 7rem);
  line-height: 1;
  letter-spacing: -0.08em;
}

.timer-display p {
  margin: 0.85rem 0 0;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.84rem;
}

@media (max-width: 960px) {
  .hero-grid,
  .value-card,
  .feature-grid,
  .tool-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    max-width: 13ch;
  }

  .panel-main {
    min-height: auto;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
  }

  .navbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .tool-page-header,
  .nav-links {
    width: 100%;
  }

  .tool-page-header {
    flex-direction: column;
    flex-wrap: wrap;
  }

  .nav-links a {
    padding-left: 0;
  }

  .hero-section {
    padding-top: 2.5rem;
  }

  .hero-copy h1 {
    max-width: 100%;
  }

  .hero-highlights {
    flex-direction: column;
  }

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

  .tool-metrics,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .value-card,
  .panel-card,
  .tool-card {
    border-radius: 22px;
  }
}

@media (max-width: 480px) {
  .container {
    width: min(calc(100% - 1.25rem), var(--container));
  }

  .brand {
    align-items: flex-start;
  }

  .brand-mark {
    width: 2.7rem;
    height: 2.7rem;
  }

  .btn {
    width: 100%;
  }

  .feature-card,
  .value-card,
  .panel-card,
  .tool-card {
    padding: 1.25rem;
  }

  .tool-actions .btn,
  .back-link {
    width: 100%;
  }

  .list-item,
  .task-row,
  .tool-card-title {
    align-items: flex-start;
    flex-direction: column;
  }
}