/* Signup page — Apple-inspired */

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

:root {
  --black: #000000;
  --near-black: #1d1d1f;
  --light-gray: #f5f5f7;
  --white: #ffffff;
  --apple-blue: #0071e3;
  --link-blue: #0066cc;
  --bright-blue: #2997ff;
  --error-red: #d70015;
  --success-green: #1db954;
  --text-secondary: rgba(0, 0, 0, 0.72);
  --text-tertiary: rgba(0, 0, 0, 0.56);
  --text-quaternary: rgba(0, 0, 0, 0.36);
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-default: rgba(0, 0, 0, 0.12);
  --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-text: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

body {
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.022em;
  color: var(--near-black);
  background: var(--light-gray);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

[hidden] { display: none !important; }

a {
  color: var(--link-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ═══════ Nav ═══════ */
.nav {
  background: var(--black);
  height: 48px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-inner {
  max-width: 980px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.018em;
}

.nav-logo:hover {
  text-decoration: none;
}

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

.nav-links a {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.8);
  letter-spacing: -0.01em;
}

.nav-links a:hover {
  color: #ffffff;
  text-decoration: none;
}

/* ═══════ Main / card ═══════ */
.signup-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  min-height: calc(100vh - 48px);
}

.signup-card {
  width: 100%;
  max-width: 480px;
  background: var(--white);
  border-radius: 22px;
  padding: 56px 48px;
}

.signup-step {
  /* identical structure for each step */
}

.signup-headline {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 600;
  line-height: 1.11;
  letter-spacing: -0.005em;
  color: var(--near-black);
  margin-bottom: 16px;
}

.signup-sub {
  font-size: 17px;
  line-height: 1.47;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.signup-email-display {
  color: var(--near-black);
  font-weight: 600;
}

.signup-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.signup-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.016em;
  color: var(--text-secondary);
  margin-bottom: -4px;
}

.signup-input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border-default);
  border-radius: 12px;
  font-family: var(--font-text);
  font-size: 16px;
  letter-spacing: -0.022em;
  background: var(--white);
  color: var(--near-black);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.signup-input:focus {
  outline: none;
  border-color: var(--apple-blue);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
}

.signup-otp {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  letter-spacing: 0.2em;
  text-align: center;
  font-size: 22px;
  font-weight: 600;
}

.signup-error {
  margin-top: 8px;
  padding: 12px 14px;
  background: rgba(255, 59, 48, 0.08);
  color: var(--error-red);
  border-radius: 8px;
  font-size: 14px;
}

.signup-info {
  margin-top: 8px;
  padding: 12px 14px;
  background: rgba(29, 185, 84, 0.10);
  color: var(--success-green);
  border-radius: 8px;
  font-size: 14px;
}

.signup-foot {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-top: 8px;
}

/* ═══════ Buttons ═══════ */
.btn-primary {
  display: inline-block;
  padding: 14px 28px;
  border: none;
  border-radius: 980px;
  background: var(--apple-blue);
  color: #ffffff;
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.022em;
  cursor: pointer;
  transition: background-color 0.15s;
  text-decoration: none;
  text-align: center;
}

.btn-primary:hover:not(:disabled) {
  background: #0077ed;
  text-decoration: none;
}

.btn-primary:disabled {
  background: var(--text-quaternary);
  cursor: not-allowed;
}

.btn-primary-block {
  display: block;
  width: 100%;
}

.btn-link {
  background: none;
  border: none;
  color: var(--link-blue);
  font-family: var(--font-text);
  font-size: 14px;
  cursor: pointer;
  padding: 4px 0;
  text-align: center;
  letter-spacing: -0.016em;
}

.btn-link:hover {
  text-decoration: underline;
}

/* ═══════ Success ═══════ */
.signup-success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(29, 185, 84, 0.12);
  color: var(--success-green);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.signup-success-icon svg {
  width: 32px;
  height: 32px;
}

.signup-step#step3 {
  text-align: center;
}

.plan-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 980px;
  background: rgba(0, 113, 227, 0.1);
  color: var(--apple-blue);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.signup-next {
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
  text-align: left;
}

.signup-next-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.012em;
  color: var(--near-black);
  margin-bottom: 8px;
}

.signup-next-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

@media (max-width: 600px) {
  .signup-card {
    padding: 40px 28px;
  }

  .signup-headline {
    font-size: 28px;
  }
}