:root {
  --bg: #F0F4FF;
  --surface: #FFFFFF;
  --surface2: #F8FAFF;
  --border: rgba(37,99,235,0.1);
  --border-strong: rgba(37,99,235,0.18);
  --accent: #2563EB;
  --accent-light: #3B82F6;
  --accent-bg: rgba(37,99,235,0.07);
  --success: #059669;
  --success-bg: rgba(5,150,105,0.08);
  --warning: #D97706;
  --warning-bg: rgba(217,119,6,0.08);
  --danger: #DC2626;
  --danger-bg: rgba(220,38,38,0.08);
  --text: #0F172A;
  --text-muted: #94A3B8;
  --text-secondary: #475569;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 1px 4px rgba(37,99,235,0.08), 0 4px 16px rgba(37,99,235,0.06);
  --shadow-lg: 0 4px 24px rgba(37,99,235,0.12);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #EEF2FF 0%, #F0F7FF 50%, #EFF6FF 100%);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

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

/* NAV */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 64px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 0 rgba(37,99,235,0.08);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 16px;
  color: var(--text);
  text-decoration: none;
}
.nav-logo svg { color: var(--accent-light); }
.nav-links { display: flex; gap: 1.5rem; }
.nav-links a {
  color: var(--text-secondary);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s;
  font-weight: 500;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a.active { color: var(--accent); font-weight: 600; }
.nav-badge {
  font-size: 11px;
  background: #DBEAFE;
  color: #1D4ED8;
  border: 1px solid #BFDBFE;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 500;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-light); color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { background: var(--surface2); color: var(--text); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; color: #fff; }
.btn-lg { padding: 14px 28px; font-size: 15px; }
.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

/* CARDS */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.card-sm { padding: 1rem; }

/* FORM */
textarea, input[type=text], input[type=email], select {
  width: 100%;
  background: #FFFFFF;
  border: 1px solid #C7D2FE;
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  padding: 10px 14px;
  font-family: inherit;
  transition: all 0.2s;
  outline: none;
  resize: vertical;
  box-shadow: 0 1px 2px rgba(37,99,235,0.05);
}
textarea:focus, input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
textarea::placeholder, input::placeholder { color: var(--text-muted); }
label { font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; display: block; }

/* UPLOAD ZONE */
.upload-zone {
  border: 2px dashed #C7D2FE;
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: #F8FAFF;
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--accent);
  background: #EEF2FF;
}
.upload-zone svg { color: var(--text-muted); margin-bottom: 0.75rem; }
.upload-zone p { color: var(--text-secondary); font-size: 14px; margin-top: 0.5rem; }
.upload-zone strong { color: var(--text); font-size: 15px; }

/* BADGES */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 20px;
  font-weight: 500;
}
.badge-blue { background: #DBEAFE; color: #1D4ED8; border: 1px solid #BFDBFE; }
.badge-green { background: #D1FAE5; color: #065F46; border: 1px solid #A7F3D0; }
.badge-yellow { background: #FEF3C7; color: #92400E; border: 1px solid #FDE68A; }
.badge-red { background: #FEE2E2; color: #991B1B; border: 1px solid #FECACA; }

/* PROGRESS RING */
.score-ring {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.score-ring svg { transform: rotate(-90deg); }
.score-ring .score-text {
  position: absolute;
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
}
.score-ring .score-label {
  position: absolute;
  bottom: -20px;
  font-size: 11px;
  color: var(--text-muted);
}

/* STEP INDICATOR */
.steps {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 2rem;
}
.step {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.step.active { color: var(--accent-light); }
.step.done { color: var(--success); }
.step-num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}
.step.active .step-num { background: var(--accent); border-color: var(--accent); color: #fff; }
.step.done .step-num { background: var(--success); border-color: var(--success); color: #fff; }
.step-line { flex: 1; height: 1px; background: var(--border); margin: 0 12px; min-width: 30px; }

/* LOADER */
.loader {
  display: inline-flex;
  gap: 4px;
  align-items: center;
}
.loader span {
  width: 6px; height: 6px;
  background: var(--accent-light);
  border-radius: 50%;
  animation: bounce 1s infinite;
}
.loader span:nth-child(2) { animation-delay: 0.15s; }
.loader span:nth-child(3) { animation-delay: 0.3s; }
@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* TOAST */
#toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 18px;
  font-size: 14px;
  z-index: 9999;
  display: none;
  align-items: center;
  gap: 8px;
  max-width: 320px;
  box-shadow: var(--shadow-lg);
}
#toast.show { display: flex; }
#toast.success { border-color: var(--success); color: var(--success); }
#toast.error { border-color: var(--danger); color: var(--danger); }

/* LAYOUT HELPERS */
.container { max-width: 900px; margin: 0 auto; padding: 0 1.5rem; }
.container-wide { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-sm { font-size: 13px; }
.text-xs { font-size: 12px; }
.font-500 { font-weight: 500; }
.font-600 { font-weight: 600; }

/* CHIP LIST */
.chip-list { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 20px;
  background: #EEF2FF;
  border: 1px solid #C7D2FE;
  color: #3730A3;
}

/* SECTION TITLE */
.section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

@media (max-width: 640px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  nav { padding: 0 1rem; }
  .nav-links { display: none; }
  .container, .container-wide { padding: 0 1rem; }
}