/* ====== RESET & BASE ====== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1a5276;
  --primary-light: #2e86c1;
  --accent: #2a9d8f;
  --accent-light: #8dd4c8;
  --bg: #ffffff;
  --bg-alt: #f4f7fa;
  --text: #2c3e50;
  --text-light: #6c757d;
  --border: #dee2e6;
  --success: #28a745;
  --error: #dc3545;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ====== HEADER ====== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon { font-size: 28px; }
.logo-icon-svg { flex-shrink: 0; }

.logo-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  display: block;
  line-height: 1.2;
}

.logo-subtitle {
  font-size: 11px;
  color: var(--text-light);
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav a {
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}

.nav a:hover { color: var(--primary); text-decoration: none; }

/* ====== BUTTONS ====== */
.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-decoration: none;
}

.btn:hover { text-decoration: none; }

.btn-primary,
.btn-primary:link,
.btn-primary:visited,
.btn-primary:active {
  background: var(--accent);
  color: #ffffff !important;
}

.btn-primary:hover {
  background: #238b7e;
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(42,157,143,0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

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

.btn-nav,
.btn-nav:link,
.btn-nav:visited,
.btn-nav:active {
  background: var(--primary);
  color: #ffffff !important;
  padding: 8px 18px;
  border-radius: 20px;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.btn-nav:hover { background: #143d5a; color: #ffffff !important; }

.btn-full { width: 100%; text-align: center; padding: 14px; font-size: 16px; }

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ====== HERO ====== */
.hero {
  background: linear-gradient(135deg, #0d2137 0%, #1a5276 50%, #0d3b4f 100%);
  padding: 80px 0;
  color: white;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
}

.highlight { color: var(--accent-light); }

.hero-desc {
  font-size: 16px;
  color: #b0c4d8;
  line-height: 1.7;
  margin-bottom: 28px;
}

.hero-actions { display: flex; gap: 16px; }

/* Layers diagram */
.layers-diagram {
  perspective: 800px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transform: rotateX(15deg) rotateY(-10deg);
}

.layer {
  padding: 14px 24px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  transform: translateZ(0);
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.layer-1 { background: linear-gradient(90deg, #e74c3c, #c0392b); }
.layer-2 { background: linear-gradient(90deg, #e67e22, #d35400); margin-left: 10px; }
.layer-3 { background: linear-gradient(90deg, #f1c40f, #d4ac0d); color: #333; margin-left: 20px; }
.layer-4 { background: linear-gradient(90deg, #2ecc71, #27ae60); margin-left: 30px; }
.layer-5 { background: linear-gradient(90deg, #3498db, #2980b9); margin-left: 40px; }
.layer-6 { background: linear-gradient(90deg, #9b59b6, #8e44ad); margin-left: 50px; }

/* ====== SECTIONS ====== */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }

.section-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  text-align: center;
}

.section-intro {
  font-size: 16px;
  color: var(--text-light);
  text-align: center;
  max-width: 700px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

/* ====== FEATURES GRID ====== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.feature-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.feature-icon { font-size: 32px; margin-bottom: 12px; }
.feature-card h3 { font-size: 18px; color: var(--primary); margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

/* ====== OBJECTIVES ====== */
.objectives {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: var(--shadow);
}

.objectives h3 {
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 16px;
}

.objectives ul { list-style: none; }
.objectives li {
  padding: 8px 0 8px 28px;
  position: relative;
  font-size: 14px;
  line-height: 1.6;
}
.objectives li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

/* ====== USE CASES ====== */
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.usecase-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

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

.usecase-number {
  display: inline-block;
  background: var(--primary);
  color: white;
  font-size: 12px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.usecase-card h4 { font-size: 15px; color: var(--primary); margin-bottom: 8px; }
.usecase-card p { font-size: 13px; color: var(--text-light); line-height: 1.5; }

/* ====== ECOSYSTEM ====== */
.ecosystem-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.ecosystem-col h3 {
  font-size: 16px;
  color: var(--primary);
  margin-bottom: 16px;
  font-weight: 600;
}

.tags { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  background: #e8f4f8;
  color: var(--primary);
  border: 1px solid #c8dfe8;
}

.tag-eu {
  background: #e8f5e9;
  color: #1b5e20;
  border-color: #c8e6c9;
}

/* ====== ONBOARDING ====== */
.section-onboarding {
  background: linear-gradient(180deg, #f4f7fa 0%, #e8f4f8 100%);
  padding: 80px 0;
}

.onboarding-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.onboarding-info h3 {
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 28px;
}

.steps { display: flex; flex-direction: column; gap: 20px; }

.step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.step-content h4 { font-size: 15px; color: var(--primary); margin-bottom: 4px; }
.step-content p { font-size: 13px; color: var(--text-light); line-height: 1.5; }

/* ====== FORM ====== */
.onboarding-form-wrapper {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 32px;
}

.onboarding-form { display: flex; flex-direction: column; gap: 16px; }

.form-section-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  margin-top: 4px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--accent-light);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-group { display: flex; flex-direction: column; gap: 6px; }

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.form-group input {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(42,157,143,0.15);
}

.form-group input::placeholder { color: #adb5bd; }

.form-group select {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  background: white;
  color: var(--text);
  transition: border-color 0.2s;
  appearance: auto;
}

.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(42,157,143,0.15);
}

.form-checks {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 4px;
}

.check-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-light);
  cursor: pointer;
}

.check-label input[type="checkbox"] {
  margin-top: 3px;
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

.check-label a { color: var(--accent); font-weight: 600; }

.form-message {
  margin-top: 12px;
  padding: 14px;
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.6;
}

.form-message.success {
  background: #d4edda;
  border: 1px solid #c3e6cb;
  color: #155724;
}

.form-message.error {
  background: #f8d7da;
  border: 1px solid #f5c6cb;
  color: #721c24;
}

.form-message a { color: var(--accent); font-weight: 600; }

/* ====== SUBMIT BUTTON SPINNER ====== */
.btn .btn-spinner {
  display: inline-flex;
  align-items: center;
  margin-left: 8px;
  animation: spin 1s linear infinite;
}

.btn.loading {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* ====== FORM TRANSITIONS ====== */
.onboarding-form {
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* ====== SUCCESS STATE ====== */
.form-success {
  text-align: center;
  padding: 20px 0;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.form-success.visible {
  opacity: 1;
  transform: translateY(0);
}

.success-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--success);
  color: white;
  font-size: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  animation: pop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) 0.1s both;
}

@keyframes pop {
  from { transform: scale(0); }
  to { transform: scale(1); }
}

.form-success h3 {
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 8px;
}

.form-success .success-detail {
  font-size: 15px;
  color: var(--text-light);
  margin-bottom: 28px;
}

.success-next {
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: left;
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 8px;
}

.success-step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.success-step-icon {
  font-size: 24px;
  flex-shrink: 0;
  margin-top: 2px;
}

.success-step strong {
  display: block;
  font-size: 14px;
  color: var(--text);
  margin-bottom: 2px;
}

.success-step p {
  font-size: 13px;
  color: var(--text-light);
  margin: 0;
}

.btn-link {
  display: block;
  margin-top: 16px;
  background: none;
  border: none;
  color: var(--accent);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: underline;
  width: 100%;
  text-align: center;
}

.btn-link:hover {
  color: #238b7e;
}

.form-hint {
  margin-top: 20px;
  padding: 14px;
  background: #fff3cd;
  border: 1px solid #ffc107;
  border-radius: var(--radius);
  font-size: 13px;
  color: #856404;
  line-height: 1.6;
}

.form-hint code {
  background: rgba(0,0,0,0.08);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 12px;
}

.form-hint a { color: #664d03; font-weight: 600; }

/* ====== FOOTER ====== */
.footer {
  background: #0d2137;
  color: #b0c4d8;
  padding: 48px 0 32px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer .logo-title {
  color: white;
  font-size: 18px;
  margin-bottom: 8px;
}

.footer-col p { font-size: 13px; line-height: 1.6; }
.footer-col h4 { color: white; font-size: 14px; margin-bottom: 12px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: var(--accent-light); font-size: 13px; }
.footer-col a:hover { color: white; }

.footer-funding {
  grid-column: 1 / -1;
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 12px;
  line-height: 1.8;
  color: #7f9cb8;
}

/* ====== RESPONSIVE ====== */
@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero h1 { font-size: 28px; }
  .features-grid { grid-template-columns: 1fr; }
  .usecases-grid { grid-template-columns: 1fr; }
  .ecosystem-content { grid-template-columns: 1fr; }
  .onboarding-layout { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .nav { gap: 12px; }
  .nav a { font-size: 12px; }
}

/* ====== AUTH NAV ====== */
.nav-auth {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-login-nav,
.btn-login-nav:link,
.btn-login-nav:visited {
  background: var(--accent);
  color: #ffffff !important;
  padding: 8px 20px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 14px;
  transition: background 0.2s;
  text-decoration: none;
  display: inline-block;
}

.btn-login-nav:hover { background: #238b7e; color: #ffffff !important; text-decoration: none; }

.user-menu {
  display: none;
  align-items: center;
  gap: 16px;
}

.user-menu.active { display: flex; }

.user-menu-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  padding-right: 16px;
  border-right: 1px solid var(--border);
}

.user-menu-links {
  display: flex;
  gap: 6px;
}

.user-menu-links a {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  background: #e8f4f8;
  color: var(--primary) !important;
  border: 1px solid #c8dfe8;
  transition: all 0.2s;
  text-decoration: none;
}

.user-menu-links a:hover {
  background: var(--primary);
  color: white !important;
  text-decoration: none;
  border-color: var(--primary);
}

.btn-logout-nav {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-light);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-logout-nav:hover { border-color: var(--error); color: var(--error); }

@media (max-width: 768px) {
  .user-menu-links { flex-wrap: wrap; }
  .nav-auth { flex-wrap: wrap; justify-content: flex-end; }
}