/* Concepto Forge — auth & onboarding (dark sci-fi) */
:root {
  --cf-bg: #070b14;
  --cf-bg2: #0d1324;
  --cf-card: rgba(14, 20, 38, 0.88);
  --cf-border: rgba(120, 180, 255, 0.18);
  --cf-text: #e8edf7;
  --cf-muted: #8b9bb8;
  --cf-accent: #5ce1ff;
  --cf-accent2: #a855f7;
  --cf-glow: 0 0 24px rgba(92, 225, 255, 0.25);
  --cf-radius: 16px;
  --cf-font: "Segoe UI", system-ui, sans-serif;
  --cf-display: "Playfair Display", Georgia, serif;
}

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

body.cf-auth {
  font-family: var(--cf-font);
  background: var(--cf-bg);
  color: var(--cf-text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(92, 225, 255, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(168, 85, 247, 0.08), transparent),
    linear-gradient(180deg, #070b14 0%, #0a1020 100%);
}

.cf-wrap {
  width: 100%;
  max-width: 440px;
}

.cf-wrap--wide { max-width: 720px; }

.cf-brand {
  text-align: center;
  margin-bottom: 28px;
}

.cf-brand h1 {
  font-family: var(--cf-display);
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 700;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, var(--cf-accent), var(--cf-accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cf-brand p {
  color: var(--cf-muted);
  margin-top: 8px;
  font-size: 15px;
}

.cf-card {
  background: var(--cf-card);
  border: 1px solid var(--cf-border);
  border-radius: var(--cf-radius);
  padding: 28px 24px;
  backdrop-filter: blur(12px);
  box-shadow: var(--cf-glow), 0 20px 60px rgba(0, 0, 0, 0.45);
}

.cf-social {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.cf-btn-social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--cf-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--cf-text);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, transform 0.15s;
}

.cf-btn-social:hover {
  border-color: rgba(92, 225, 255, 0.45);
  background: rgba(92, 225, 255, 0.08);
  transform: translateY(-1px);
}

.cf-btn-social.is-disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.cf-btn-social svg { width: 20px; height: 20px; flex-shrink: 0; }

.cf-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0;
  color: var(--cf-muted);
  font-size: 13px;
}

.cf-divider::before,
.cf-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--cf-border);
}

.cf-field {
  margin-bottom: 14px;
}

.cf-field label {
  display: block;
  font-size: 13px;
  color: var(--cf-muted);
  margin-bottom: 6px;
}

.cf-field input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--cf-border);
  background: rgba(0, 0, 0, 0.35);
  color: var(--cf-text);
  font-size: 16px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.cf-field input:focus {
  border-color: rgba(92, 225, 255, 0.55);
  box-shadow: 0 0 0 3px rgba(92, 225, 255, 0.12);
}

.cf-btn-primary {
  width: 100%;
  margin-top: 8px;
  padding: 13px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, #2dd4f0, #7c3aed);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
}

.cf-btn-primary:hover { opacity: 0.92; transform: translateY(-1px); }

.cf-alert {
  padding: 12px 14px;
  border-radius: 10px;
  margin-bottom: 16px;
  font-size: 14px;
}

.cf-alert--error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fca5a5;
}

.cf-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: var(--cf-muted);
}

.cf-footer a {
  color: var(--cf-accent);
  text-decoration: none;
}

.cf-footer a:hover { text-decoration: underline; }

/* Onboarding interests grid */
.cf-interests {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin: 20px 0;
}

.cf-interest {
  position: relative;
  cursor: pointer;
}

.cf-interest input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.cf-interest-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--cf-border);
  background: rgba(0, 0, 0, 0.25);
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.cf-interest input:checked + .cf-interest-box {
  border-color: var(--cf-accent);
  background: rgba(92, 225, 255, 0.1);
  box-shadow: 0 0 16px rgba(92, 225, 255, 0.2);
}

.cf-interest-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(168, 85, 247, 0.2);
  color: var(--cf-accent);
  font-size: 16px;
}

.cf-skip {
  display: inline-block;
  margin-top: 12px;
  color: var(--cf-muted);
  font-size: 13px;
  text-decoration: none;
}

.cf-skip:hover { color: var(--cf-text); }