@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  /* LIGHT THEME (Default - Softer & friendlier to the eyes) */
  --bg-body: #F4F5F7;
  --bg-card: #FFFFFF;
  --bg-navbar: rgba(255, 255, 255, 0.95);
  --border-subtle: rgba(0, 0, 0, 0.08);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.05);
  
  --primary-color: #1B3A5C;
  --primary-hover: #11253d;
  --accent-color: #C9A84C;
  --accent-hover: #b0913f;
  
  --text-main: #1E293B;
  --text-secondary: #475569;
  --text-inverse: #FFFFFF;
  
  --input-bg: #FFFFFF;
  --input-border: #CBD5E1;
  
  --success: #10B981;
  --error: #EF4444;
  --info: #3B82F6;
  --warning: #F59E0B;
  
  --dropzone-bg: rgba(27, 58, 92, 0.02);
  --dropzone-border: rgba(27, 58, 92, 0.15);
  --dropzone-hover: rgba(27, 58, 92, 0.05);
  
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  
  --transition-speed: 0.3s;

  /* Custom variables for Verification Certificate */
  --bg-cert-card: #FFFFFF;
  --border-cert-card: rgba(0, 0, 0, 0.06);
  --bg-cert-hash: #F8FAFC;
  --border-cert-hash: #E2E8F0;
  --text-cert-hash: #0F172A;
}

body.dark-theme {
  /* DARK THEME */
  --bg-body: #0F172A;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-navbar: rgba(15, 23, 42, 0.95);
  --border-subtle: rgba(255, 255, 255, 0.1);
  --shadow-card: none;
  
  --primary-color: #38BDF8;
  --primary-hover: #0EA5E9;
  --accent-color: #C9A84C;
  --accent-hover: #E2C06A;
  
  --text-main: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-inverse: #0F172A;
  
  --input-bg: rgba(15, 23, 42, 0.6);
  --input-border: rgba(255, 255, 255, 0.1);
  
  --dropzone-bg: rgba(255, 255, 255, 0.02);
  --dropzone-border: rgba(255, 255, 255, 0.15);
  --dropzone-hover: rgba(255, 255, 255, 0.05);

  /* Custom variables for Verification Certificate (Dark Theme) */
  --bg-cert-card: rgba(30, 41, 59, 0.5);
  --border-cert-card: rgba(255, 255, 255, 0.08);
  --bg-cert-hash: rgba(15, 23, 42, 0.8);
  --border-cert-hash: rgba(255, 255, 255, 0.1);
  --text-cert-hash: #E2E8F0;
}

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

body {
  background-color: var(--bg-body);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Layout */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  flex: 1;
  width: 100%;
}

.hidden {
  display: none !important;
}

/* Typography Classes */
.primary-text {
  color: var(--text-main);
}

.secondary-text {
  color: var(--text-secondary);
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--bg-navbar);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo img, .logo-icon {
  max-height: 40px;
  border-radius: 8px;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  color: #475569; /* Slate 600 en tema claro */
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 700; /* Letras gruesas */
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.nav-links a:hover {
  color: #0F172A;
  text-shadow: 0 0 8px rgba(15, 23, 42, 0.2);
}

.nav-links a.active {
  color: var(--primary-color);
  background: rgba(99, 102, 241, 0.08);
}

body.dark-theme .nav-links a {
  color: #94A3B8; /* Slate claro en modo oscuro para contraste */
}

body.dark-theme .nav-links a:hover {
  color: #FFFFFF;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5); /* Contorno brillante en modo oscuro */
}

body.dark-theme .nav-links a.active {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.15);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  border-radius: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
}

body.dark-theme .btn-primary {
  color: var(--text-inverse);
}

body.dark-theme .btn-primary:hover {
  color: var(--text-inverse);
}

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

.btn-secondary:hover {
  background-color: var(--bg-card);
  border-color: var(--text-secondary);
}

.btn-block {
  width: 100%;
}

.btn-remove {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--error);
  padding: 0.5rem 1rem;
}

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

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  background-color: var(--border-subtle);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 1rem;
  animation: fadeIn 0.8s ease forwards;
}

.hero-title {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: #1B3A5C;
}

body.dark-theme .hero-title {
  background: linear-gradient(135deg, #FFFFFF 0%, #94A3B8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem auto;
}

/* Trust Badges */
.trust-badges {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 3rem;
}

.trust-badge-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: 50px;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-card);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Cards (Glass Card equivalent) */
.glass-card {
  background-color: var(--bg-card);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-subtle);
  transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease, transform 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}
body.dark-theme .glass-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.card-header {
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1rem;
}

/* Forms */
.grid-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .grid-form {
    grid-template-columns: 1fr 1fr;
  }
}

.form-inputs {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.input-group label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-main);
}

.input-group input,
.input-group textarea,
.input-group select {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--input-border);
  background-color: var(--input-bg);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-group input:focus,
.input-group textarea:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(27, 58, 92, 0.1);
}

body.dark-theme .input-group input:focus,
body.dark-theme .input-group textarea:focus,
body.dark-theme .input-group select:focus {
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

/* Upload Dropzone */
.upload-zone-container {
  margin-top: 1rem;
}

.upload-dropzone {
  border: 2px dashed var(--dropzone-border);
  border-radius: 12px;
  background-color: var(--dropzone-bg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

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

.dropzone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.upload-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
}

.file-hidden {
  display: none;
}

/* Hash Preview Box */
.hash-preview-box {
  background-color: var(--bg-body);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 1rem;
}

.hash-header {
  background-color: rgba(0,0,0,0.02);
  padding: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
body.dark-theme .hash-header {
  background-color: rgba(255,255,255,0.02);
}

.hash-body {
  padding: 1rem;
}

.hash-label {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.hash-code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.95rem;
  word-break: break-all;
  color: var(--primary-color);
  background: var(--input-bg);
  padding: 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
}

.file-name {
  font-weight: 600;
  color: var(--text-main);
}

.file-size {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.form-actions {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

/* Records Table */
.table-container {
  overflow-x: auto;
  margin-top: 1.5rem;
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
}

.records-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}

.records-table th,
.records-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.records-table th {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background-color: rgba(0,0,0,0.02);
}
body.dark-theme .records-table th {
  background-color: rgba(255,255,255,0.02);
}

.table-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.hash-short {
  font-family: 'Courier New', Courier, monospace;
  color: var(--text-secondary);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-blue {
  background-color: rgba(59, 130, 246, 0.1);
  color: #3B82F6;
}

.badge-purple {
  background-color: rgba(139, 92, 246, 0.1);
  color: #8B5CF6;
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: #10B981;
}

/* Audience Section */
.audience-section {
  padding: 4rem 0;
}

.audience-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .audience-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.audience-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.audience-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
}

/* FAQ Section */
.faq-section {
  padding: 4rem 0;
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border-subtle);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-main);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  outline: none;
}

.faq-answer {
  padding-bottom: 1.5rem;
  color: var(--text-secondary);
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
  animation: fadeIn 0.3s ease forwards;
}

.faq-arrow {
  transition: transform 0.3s ease;
}

.faq-item.active .faq-arrow {
  transform: rotate(180deg);
}

/* Auth Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal-content {
  width: 100%;
  max-width: 400px;
  margin: 1rem;
}

/* Gradient Background */
.gradient-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  overflow: hidden;
  opacity: 0.15; /* Subtle in light mode */
  pointer-events: none;
}

body.dark-theme .gradient-bg {
  opacity: 0.5; /* More visible in dark mode */
}

.g1, .g2 {
  position: absolute;
  filter: blur(100px);
  border-radius: 50%;
  animation: float 20s infinite ease-in-out;
}

.g1 {
  width: 40vw;
  height: 40vw;
  background: radial-gradient(circle, var(--accent-color) 0%, rgba(201, 168, 76, 0) 70%);
  top: -10vw;
  left: -10vw;
}

.g2 {
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, var(--primary-color) 0%, rgba(27, 58, 92, 0) 70%);
  bottom: -20vw;
  right: -10vw;
  animation-delay: -5s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(5%, 5%); }
  66% { transform: translate(-5%, 2%); }
}

/* Footer */
.footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-subtle);
  margin-top: auto;
}

/* Section Titles */
.section-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.8rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Comparison Table */
.comparison-table-container {
  margin-top: 4rem;
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 2.5rem;
  box-shadow: var(--shadow-card);
}

.comparison-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  text-align: center;
  margin-bottom: 2rem;
  color: var(--text-main);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.comparison-table thead tr {
  border-bottom: 2px solid var(--border-subtle);
}

.comparison-table th {
  padding: 1rem 1.2rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
}

.comparison-table th.highlight-col {
  color: var(--accent-color);
}

.comparison-table td {
  padding: 0.9rem 1.2rem;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table td:first-child {
  font-weight: 500;
}

.comparison-table tbody tr:hover {
  background: rgba(27, 58, 92, 0.03);
}

body.dark-theme .comparison-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

/* Privacy Guarantee */
.privacy-guarantee {
  margin-top: 3rem;
  text-align: center;
  background: rgba(27, 58, 92, 0.04);
  border: 1px dashed rgba(27, 58, 92, 0.2);
  padding: 1.5rem 2rem;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  font-weight: 500;
  color: var(--text-main);
}

body.dark-theme .privacy-guarantee {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.1);
}

.privacy-guarantee-desc {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 400;
}

/* Scarcity Badge */
.scarcity-badge {
  display: inline-block;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #dc2626;
  padding: 0.5rem 1.2rem;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
}

body.dark-theme .scarcity-badge {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

/* Pricing Cards */
.pricing-card {
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-radius: 20px;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.pricing-card-featured {
  border: 1px solid var(--accent-color) !important;
}

.pricing-card-popular {
  border: 2px solid var(--primary-color) !important;
  transform: scale(1.02);
}

.pricing-card-popular:hover {
  transform: scale(1.02) translateY(-4px);
}

.pricing-tag {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
  padding: 4px 16px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #fff;
  white-space: nowrap;
}

.pricing-popular-tag {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-color);
  padding: 4px 16px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #fff;
  white-space: nowrap;
}

.pricing-card-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.pricing-card-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.pricing-card-price {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  font-family: var(--font-heading);
  color: var(--text-main);
}

.pricing-card-period {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  color: var(--text-main);
  line-height: 2.2;
}

/* Step Cards */
.step-card {
  padding: 2.5rem;
  border-radius: 20px;
  text-align: left;
  transition: transform var(--transition-speed);
}

.step-card:hover {
  transform: translateY(-4px);
}

.step-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 0.8rem;
  color: var(--text-main);
}

.step-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.step-icon {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

/* Language Select */
.lang-select {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 0.5rem;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
}

.lang-select option {
  background: var(--bg-card);
  color: var(--text-main);
}

/* Logo Image */
.logo-img {
  max-height: 40px;
  border-radius: 8px;
}

/* Auth Card */
.auth-card {
  background: var(--bg-card) !important;
  border: 1px solid var(--border-subtle) !important;
}