/* ----- Reset ----- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 100%;
  height: 100vh;
}

html {
  scrollbar-width: thin;
  scrollbar-color: var(--color-gray-600) transparent;
}

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

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background-color: var(--color-gray-700);
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-gray-600);
  background-clip: content-box;
}

body {
  line-height: 1.5;
  font-family:
    "Inter", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  letter-spacing: -0.005em;
}

ul,
ol {
  list-style: none;
}

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

table {
  border-collapse: collapse;
  width: 100%;
}

img {
  max-width: 100%;
  height: auto;
}

input,
button,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

button:focus,
input:focus {
  outline: none;
}

/* ----- Navbar ----- */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--navbar-height);
  padding: 0 var(--space-5);
  background: rgba(11, 15, 26, 0.72);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), #8b5cf6 60%, var(--color-accent));
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.12),
    0 6px 16px rgba(99, 102, 241, 0.35);
}

.brand-mark::after {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.92);
  transform: rotate(45deg);
  box-shadow: 0 0 0 1.5px rgba(0, 0, 0, 0.18);
}

.brand-name {
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
}

.brand-name .accent {
  background: linear-gradient(90deg, var(--color-primary-hover), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.burger:hover {
  background: var(--color-hover);
}

.burger svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
}

.burger-toggle {
  display: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.nav-links a:hover {
  background: var(--color-hover);
  color: var(--color-text);
}

.nav-links a.active {
  background: var(--color-primary-soft);
  color: var(--color-primary-hover);
}

.nav-links .nav-help {
  position: relative;
}

.nav-links .nav-help > summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.nav-links .nav-help > summary::-webkit-details-marker {
  display: none;
}

.nav-links .nav-help > summary:hover,
.nav-links .nav-help[open] > summary {
  background: var(--color-hover);
  color: var(--color-text);
}

.nav-help-panel {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  width: min(420px, calc(100vw - 32px));
  padding: 14px 16px;
  background: rgba(20, 22, 26, 0.97);
  color: #cbd1d8;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  font-size: 13.5px;
  line-height: 1.55;
  backdrop-filter: blur(6px);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.35);
  max-height: min(60vh, 520px);
  overflow-y: auto;
  z-index: 120;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

@media (max-width: 768px) {
  .burger {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    padding: var(--space-2);
    background: var(--color-panel-background);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
  }

  .burger-toggle:checked ~ .nav-links {
    display: flex;
  }

  .nav-links li {
    margin: 0;
  }

  .nav-links a {
    padding: 10px 12px;
  }

  .nav-links .nav-help > summary {
    padding: 10px 12px;
  }

  .nav-help-panel {
    position: static;
    width: auto;
    max-height: none;
    margin: 8px 0 0;
  }
}

/* ----- Components ----- */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
}

section {
  margin-bottom: 16px;
  padding-inline: 20px;
}

.container {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

footer {
  padding: 20px;
  text-align: center;
}

.footer-nav a {
  margin: 0 10px;
  text-decoration: none;
}

.column {
  flex: 1;
  padding: 20px;
}

.hero {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 60px 20px;
}

.hero h1 {
  font-size: 2.5em;
}

.testimonials {
  padding: 40px 20px;
  text-align: center;
}

.testimonial-list blockquote {
  font-style: italic;
  margin: 15px 0;
}

form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 400px;
  margin: 0 auto;
}

input,
textarea {
  padding: 10px 12px;
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}

input:focus,
textarea:focus {
  border-color: var(--color-primary);
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text);
  font-weight: 500;
  cursor: pointer;
  min-width: 36px;
  min-height: 36px;
  padding: 0 10px;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}

.btn:hover {
  background: var(--color-hover);
}

.btn:active {
  transform: translateY(1px);
}

.btn img {
  width: 18px;
  height: 18px;
  opacity: 0.85;
}

.btn:hover img {
  opacity: 1;
}

.btn-sm {
  padding: 4px 10px;
  font-size: 0.8rem;
  min-height: 30px;
}

.btn-md {
  padding: 8px 16px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 12px 22px;
  font-size: 1rem;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-gray-900);
  border-color: var(--color-accent);
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
}

/* ----- Cards ----- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-sizing: border-box;
}

.card-title {
  padding-inline: 16px;
  padding-top: 12px;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card-content {
  padding-inline: 16px;
  padding-block: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cards .card {
  flex: 1 1 calc(33.33% - 32px);
}

.border {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

@media (max-width: 600px) {
  .container.cards .card {
    flex: 1 1 auto;
    min-width: 100%;
  }

  .column {
    flex: 1 1 auto;
  }
}