:root {
  --bg: #f5f5f7;
  --bg-alt: #ffffff;
  --fg: #111827;
  --fg-muted: #6b7280;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --border: #e5e7eb;
  --radius-lg: 16px;
  --radius-sm: 8px;
  --shadow-soft: 0 10px 25px rgba(15, 23, 42, 0.08);
  --max-width: 1120px;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

/* Layout / containers */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245, 245, 247, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--fg);
  font-weight: 600;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: 0.8rem;
}

.logo-text {
  font-size: 1.05rem;
}

.nav {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.nav a {
  text-decoration: none;
  color: var(--fg-muted);
  font-size: 0.95rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
}

.nav a:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.nav-highlight {
  background: var(--accent);
  color: #fff !important;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
}

/* Hero */

.hero {
  padding: 2.5rem 0 2.75rem;
}

.hero-small {
  padding: 2rem 0 1.75rem;
}

.hero-inner {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.hero-inner.hero-tool-inner {
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.1fr);
}

.hero-text h1 {
  font-size: 2rem;
  margin: 0 0 0.75rem;
}

.hero-subtitle {
  margin: 0 0 1.5rem;
  color: var(--fg-muted);
  max-width: 36rem;
}

.hero-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--fg-muted);
  font-size: 0.95rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.hero-meta {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: none;
  padding: 0.55rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  filter: brightness(1.05);
}

.btn-secondary {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--fg);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
}

.btn-block {
  width: 100%;
}

/* Hero tool card */

.hero-tool {
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 1.25rem 1.5rem 1.5rem;
}

.hero-tool-title {
  font-size: 1.1rem;
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.hero-tool-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-bottom: 0.5rem;
}

/* Sections */

.section {
  padding: 2.25rem 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-header {
  margin-bottom: 1.5rem;
}

.section-header h2 {
  margin: 0 0 0.3rem;
  font-size: 1.35rem;
}

.section-header p {
  margin: 0;
  color: var(--fg-muted);
}

/* Tool grid */

.tool-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.tool-card {
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  padding: 1rem;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tool-card h3 {
  margin: 0;
  font-size: 1.05rem;
}

.tool-card p {
  margin: 0 0 0.5rem;
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.tool-card-highlight {
  border-color: var(--accent);
  box-shadow: var(--shadow-soft);
}

.tool-badge {
  display: inline-flex;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  margin-bottom: 0.35rem;
}

/* Info grid */

.info-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.info-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 1rem;
  border: 1px solid var(--border);
}

.info-card h3 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}

/* Text blocks */

.text-block p {
  margin-top: 0;
  margin-bottom: 0.85rem;
  color: var(--fg-muted);
}

.text-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

/* Steps */

.steps-list {
  padding-left: 1.1rem;
  margin: 0;
}

.steps-list li {
  margin-bottom: 0.4rem;
}

/* FAQ */

.faq {
  display: grid;
  gap: 0.75rem;
}

.faq-item {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 0.85rem 1rem;
  background: #fff;
}

.faq-item h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

/* Category selection grid on homepage */
.category-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 1.5rem;
}

.category-card {
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.5rem;
}

.category-card h3 {
  margin-top: 0;
  margin-bottom: 0.4rem;
  font-size: 1.2rem;
}

.category-card p {
  margin: 0 0 0.75rem;
  color: var(--fg-muted);
  font-size: 0.9rem;
}

/* Tool forms */

.tool-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tool-form-large {
  gap: 0.75rem;
}

.dropzone {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1.5px dashed var(--border);
  padding: 0.85rem 0.9rem;
  background: #f9fafb;
  cursor: pointer;
}

.dropzone-large {
  padding: 1.2rem 1.1rem;
}

.dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.dropzone-text {
  font-size: 0.95rem;
}

.dropzone-link {
  color: var(--accent);
  text-decoration: underline;
}

.dropzone-subtext {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.8rem;
  color: var(--fg-muted);
}

.tool-note {
  margin: 0;
  font-size: 0.8rem;
  color: var(--fg-muted);
}

.tool-output {
  min-height: 1rem;
  font-size: 0.85rem;
  color: var(--fg-muted);
}

/* Tool page grid */

.tool-page-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.tool-page-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 1rem;
  border: 1px solid var(--border);
}

/* Fields */

.field-group {
  margin-top: 0.5rem;
}

.field-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.field-group input {
  width: 100%;
  margin-top: 0.2rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  padding: 0.4rem 0.5rem;
  font-size: 0.9rem;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  background: #f9fafb;
  padding: 1rem 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.footer-nav {
  display: flex;
  gap: 0.75rem;
}

.footer-nav a {
  color: var(--fg-muted);
  text-decoration: none;
}

.footer-nav a:hover {
  text-decoration: underline;
}

/* Responsive nav */

@media (max-width: 720px) {
  .hero-inner.hero-tool-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .nav-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    right: 1.25rem;
    top: 52px;
    flex-direction: column;
    align-items: flex-start;
    background: #fff;
    padding: 0.35rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-soft);
    display: none;
  }

  .nav.nav-open {
    display: flex;
  }
}