/* ==================================================

   SIGN IN PAGE — Page-specific styles

   ================================================== */

.signin-page {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: calc(56px + 64px) 24px 80px;
}

.signin-card {
  width: 100%;
  max-width: 380px;
}

.signin-header {
  text-align: center;
  margin-bottom: 36px;
}

.signin-header__logo {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--carbon);
  margin-bottom: 20px;
}

.signin-header__title {
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--carbon);
  margin-bottom: 8px;
}

.signin-header__title strong {
  font-weight: 500;
}

.signin-header__subtitle {
  font-size: 14px;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Social auth buttons */
.signin-social {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.signin-social__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 13px 20px;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s;
  min-height: 48px;
  text-decoration: none;
}

.signin-social__btn svg {
  flex-shrink: 0;
}

/* Google button */
.signin-social__btn--google {
  background: #fff;
  color: var(--carbon);
  border: 1px solid var(--border-solid);
}

.signin-social__btn--google:hover {
  border-color: var(--carbon);
}

/* Apple button */
.signin-social__btn--apple {
  background: var(--carbon);
  color: var(--bg);
  border: 1px solid var(--carbon);
}

.signin-social__btn--apple:hover {
  background: var(--carbon);
}

/* Divider */
.signin-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.signin-divider__line {
  flex: 1;
  height: 1px;
  background: var(--border-solid);
}

.signin-divider__text {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
}

/* Tab switcher */
.signin-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.signin-tabs__tab {
  flex: 1;
  padding: 10px 16px;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
}

.signin-tabs__tab--active {
  background: var(--carbon);
  color: var(--bg);
}

.signin-tabs__tab:not(.signin-tabs__tab--active):hover {
  color: var(--carbon);
  background: rgba(42, 42, 42, 0.04);
}

/* Tab content */
.signin-tab-content {
  display: none;
}

.signin-tab-content--active {
  display: block;
}

/* Magic link explainer */
.signin-magic-explainer {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: rgba(235, 98, 46, 0.06);
  border: 1px solid rgba(235, 98, 46, 0.12);
  border-radius: 12px;
  margin-bottom: 20px;
}

.signin-magic-explainer__icon {
  flex-shrink: 0;
  color: var(--catalyst-teal);
  margin-top: 1px;
}

.signin-magic-explainer__text {
  font-size: 13px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-secondary, #555);
  letter-spacing: -0.01em;
}

.signin-magic-explainer__text strong {
  font-weight: 600;
  color: var(--carbon);
}

/* Magic link form */
.signin-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.signin-form__input {
  font-family: var(--font);
  font-size: 15px;
  font-weight: 400;
  color: var(--carbon);
  background: var(--white);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  outline: none;
  width: 100%;
  transition: border-color 0.2s;
}

.signin-form__input::placeholder {
  color: var(--text-disabled);
  font-weight: 300;
}

.signin-form__input:focus {
  border-color: var(--carbon);
}

.signin-form__input--error {
  border-color: #d32f2f;
  background-color: rgba(211, 47, 47, 0.04);
}

.signin-form__input--error:focus {
  border-color: #d32f2f;
}

.signin-form__error {
  font-size: 13px;
  color: #d32f2f;
  font-weight: 400;
  line-height: 1.4;
  margin-top: -8px;
}

.signin-form__submit {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 13px 28px;
  border: 1px solid var(--carbon);
  border-radius: var(--radius-pill);
  background: var(--carbon);
  color: var(--bg);
  cursor: pointer;
  transition: all 0.3s;
  min-height: 48px;
}

.signin-form__submit:hover {
  background: transparent;
  color: var(--carbon);
}

/* Success state */
.signin-success {
  display: none;
  text-align: center;
  padding: 24px 0;
}

.signin-success.visible {
  display: block;
}

.signin-success__icon {
  width: 48px;
  height: 48px;
  stroke: var(--catalyst-teal);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  margin: 0 auto 16px;
}

.signin-success__title {
  font-size: 18px;
  font-weight: 500;
  color: var(--carbon);
  margin-bottom: 8px;
}

.signin-success__desc {
  font-size: 13px;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Help link */
.signin-help {
  text-align: center;
  margin-top: 28px;
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 300;
}

.signin-help a {
  color: var(--carbon);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.signin-help a:hover {
  color: var(--catalyst-orange);
}

/* Secondary help link (forgot password) */
.signin-help--secondary {
  margin-top: 8px;
}

.signin-help--secondary a {
  font-weight: 400;
  color: var(--text-muted);
}

.signin-help--secondary a:hover {
  color: var(--carbon);
}

/* RUO disclaimer */
.signin-disclaimer {
  text-align: center;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  font-weight: 300;
  color: var(--text-muted);
  line-height: 1.6;
}

.signin-disclaimer a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: var(--border-solid);
}

.signin-disclaimer a:hover {
  color: var(--carbon);
}

/* ==================================================
   RESPONSIVE
   ================================================== */
@media (width <= 600px) {
  .signin-page {
    padding: calc(56px + 16px) 20px 32px;
    align-items: flex-start;
    min-height: auto;
  }

  .signin-card {
    max-width: 100%;
  }

  .signin-header {
    margin-bottom: 28px;
  }

  .signin-header__title {
    font-size: 28px;
  }

  /* Touch targets */
  .signin-social__btn {
    min-height: 52px;
    padding: 14px 20px;
  }

  .signin-form__submit {
    min-height: 52px;
  }

  .signin-form__input {
    min-height: 48px;
    padding: 14px 16px;
    font-size: 16px; /* prevents iOS zoom */
  }

  .signin-help a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
}