/* =========================================================
   PaperDesk — Professional PDF Tools
   ========================================================= */

:root {
  --bg: #f7f8fc;
  --white: #ffffff;
  --text: #171a24;
  --muted: #697386;
  --primary: #e53935;
  --primary-dark: #c62828;
  --primary-soft: #fff1f0;
  --border: #e5e7eb;
  --shadow: 0 12px 35px rgba(20, 24, 40, 0.08);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

button,
input {
  font: inherit;
}

/* ================= HEADER ================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.navbar {
  max-width: 1180px;
  margin: auto;
  min-height: 72px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
}

.logo {
  font-size: 25px;
  font-weight: 800;
  letter-spacing: -0.8px;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: #4b5563;
  font-size: 15px;
  font-weight: 600;
  transition: 0.2s ease;
}

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

.nav-button {
  background: var(--primary);
  color: white !important;
  padding: 10px 17px;
  border-radius: 10px;
}

.nav-button:hover {
  background: var(--primary-dark);
}

/* ================= HERO ================= */

.hero {
  max-width: 1180px;
  margin: auto;
  padding: 90px 24px 70px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 22px;
}

.hero h1 {
  max-width: 850px;
  margin: 0 auto 20px;
  font-size: clamp(42px, 6vw, 70px);
  line-height: 1.04;
  letter-spacing: -2.8px;
}

.hero h1 span {
  color: var(--primary);
}

.hero p {
  max-width: 680px;
  margin: 0 auto 32px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 0 22px;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 700;
  transition: 0.2s ease;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 8px 20px rgba(229, 57, 53, 0.2);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-secondary {
  background: white;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: #cbd5e1;
  transform: translateY(-1px);
}

/* ================= TOOLS ================= */

.section {
  max-width: 1180px;
  margin: auto;
  padding: 30px 24px 85px;
}

.section-heading {
  text-align: center;
  margin-bottom: 35px;
}

.section-heading h2 {
  margin: 0 0 8px;
  font-size: 34px;
  letter-spacing: -1px;
}

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

.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tool-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: 0.25s ease;
}

.tool-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 18px 45px rgba(20, 24, 40, 0.12);
}

.tool-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 24px;
  margin-bottom: 20px;
}

.tool-card h3 {
  margin: 0 0 9px;
  font-size: 20px;
}

.tool-card p {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 14px;
}

.tool-link {
  color: var(--primary);
  font-weight: 700;
  font-size: 14px;
}

/* ================= TRUST ================= */

.trust-section {
  max-width: 900px;
  margin: 0 auto 80px;
  padding: 0 24px;
}

.trust-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
}

.trust-box h2 {
  margin-top: 0;
}

.trust-box p {
  color: var(--muted);
  margin-bottom: 0;
}

/* ================= TOOL PAGE ================= */

.tool-page {
  max-width: 900px;
  margin: auto;
  padding: 65px 24px 90px;
}

.tool-header {
  text-align: center;
  margin-bottom: 35px;
}

.tool-header h1 {
  font-size: clamp(34px, 5vw, 52px);
  margin: 0 0 12px;
  letter-spacing: -1.5px;
}

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

.upload-box {
  background: white;
  border: 2px dashed #d5dae3;
  border-radius: 20px;
  padding: 55px 25px;
  text-align: center;
  transition: 0.2s ease;
}

.upload-box:hover {
  border-color: var(--primary);
  background: #fffafa;
}

.upload-box h3 {
  margin: 10px 0 6px;
}

.upload-box p {
  color: var(--muted);
  margin: 0 0 22px;
}

.upload-icon {
  font-size: 42px;
}

.file-input {
  display: none;
}

.file-list {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

.file-item {
  background: white;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 13px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
}

.action-area {
  margin-top: 22px;
  text-align: center;
}

/* ================= NOTICE ================= */

.privacy-note {
  margin-top: 25px;
  padding: 18px 20px;
  border-radius: 14px;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #166534;
  text-align: center;
  font-size: 14px;
}

/* ================= FOOTER ================= */

.site-footer {
  background: #171a24;
  color: white;
  margin-top: 20px;
}

.footer-inner {
  max-width: 1180px;
  margin: auto;
  padding: 45px 24px;
  display: flex;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.footer-brand {
  max-width: 400px;
}

.footer-brand h3 {
  margin: 0 0 10px;
}

.footer-brand p {
  margin: 0;
  color: #aeb4c2;
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #d7dbe4;
  font-size: 14px;
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  padding: 18px 24px;
  color: #9ca3af;
  font-size: 13px;
}

/* ================= MOBILE ================= */

@media (max-width: 800px) {
  .nav-links {
    gap: 12px;
  }

  .nav-links a:not(.nav-button) {
    display: none;
  }

  .hero {
    padding-top: 65px;
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    letter-spacing: -1.8px;
  }
}

@media (max-width: 480px) {
  .navbar {
    padding: 0 16px;
  }

  .logo {
    font-size: 22px;
  }

  .hero,
  .section,
  .tool-page {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero p {
    font-size: 16px;
  }

  .tool-card {
    padding: 22px;
  }

  .upload-box {
    padding: 40px 18px;
  }
}