:root {
  --primary: #d62828;
  --primary-dark: #a71e1e;
  --accent: #fff5f5;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #fde2e2;
  --surface: #ffffff;
  --shadow: 0 15px 35px rgba(214, 40, 40, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: linear-gradient(180deg, #fff8f8 0%, #ffffff 100%);
}

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

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.15rem;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.8rem;
  background: var(--primary);
  color: white;
}

.nav-links {
  display: flex;
  gap: 1.2rem;
  color: var(--muted);
  font-weight: 600;
}

.hero {
  padding: 4.5rem 0 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.75rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 3.4vw, 3.3rem);
  margin: 0 0 1rem;
}

.hero-text,
.section-heading p,
.info-card p,
.tool-card p,
.tool-intro p,
.upload-meta,
.result-box p {
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1.4rem 0 1.2rem;
}

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

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

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

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

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.hero-points li {
  background: white;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.5rem 0.8rem;
  color: var(--text);
}

.hero-card,
.tool-card,
.info-card,
.upload-card,
.workflow-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 1.5rem;
}

.hero-card ul {
  padding-left: 1.1rem;
  color: var(--muted);
}

.section {
  padding: 2.5rem 0 3rem;
}

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

.section-heading h2 {
  font-size: clamp(1.6rem, 2.3vw, 2.1rem);
  margin: 0 0 0.4rem;
}

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

.tool-card {
  display: block;
  padding: 1.2rem;
  transition: transform 180ms ease, border-color 180ms ease;
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
}

.tool-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.process-section {
  padding-bottom: 4rem;
}

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

.info-card {
  padding: 1.2rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.2rem 0 2rem;
  color: var(--muted);
}

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

.tool-page {
  padding: 2.5rem 0 4rem;
}

.tool-shell {
  display: grid;
  gap: 1.4rem;
}

.tool-intro h1 {
  margin-bottom: 0.4rem;
}

.tool-layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 1.2rem;
}

.upload-card,
.workflow-card {
  padding: 1.25rem;
}

.dropzone {
  margin-top: 1rem;
  border: 2px dashed var(--primary);
  background: linear-gradient(135deg, #fff7f7, #ffe8e8);
  padding: 2rem;
  border-radius: 1rem;
  text-align: center;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.dropzone:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.dropzone input {
  display: none;
}

.dropzone-title {
  margin: 0 0 0.4rem;
  font-weight: 700;
  color: var(--primary);
}

.upload-meta {
  margin-top: 0.9rem;
  padding: 0.8rem 1rem;
  border-radius: 0.9rem;
  background: #fffaf5;
  border: 1px solid var(--border);
}

.steps-list {
  display: grid;
  gap: 0.7rem;
  margin: 1rem 0;
}

.step {
  padding: 0.7rem 0.85rem;
  border-radius: 0.9rem;
  background: #f8f9fb;
  color: var(--muted);
  transition: all 180ms ease;
}

.step.active {
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
}

.step.done {
  background: #eaf7ea;
  color: #247a2d;
}

.progress-track {
  width: 100%;
  height: 0.7rem;
  background: #f3f4f6;
  border-radius: 999px;
  overflow: hidden;
  margin: 1rem 0;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), #ff6b6b);
  transition: width 220ms ease;
}

.result-box {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 0.9rem;
  background: #f6fff7;
  border: 1px solid #c9e9ce;
}

.hidden {
  display: none;
}

@media (max-width: 900px) {
  .hero-grid,
  .tool-layout,
  .steps-grid,
  .tool-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-bar,
  .footer-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 0.7rem;
  }

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