/* ===== Sign In / Sign Up Page ===== */

.si-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.si-header-inner {
  max-width: 72rem; margin: 0 auto; padding: 0 1.5rem;
  height: 3.75rem; display: flex; align-items: center; justify-content: space-between;
}
.si-back-link {
  display: flex; align-items: center; gap: 0.25rem;
  font-size: 0.8125rem; color: var(--muted-fg);
  transition: color 0.15s;
}
.si-back-link:hover { color: var(--primary); }

/* Main */
.si-main {
  min-height: calc(100vh - 3.75rem - 10rem);
  display: flex; align-items: center; justify-content: center;
  padding: 2.5rem 1.25rem;
}

/* Layout */
.si-layout {
  display: grid; grid-template-columns: 1fr;
  gap: 2.5rem; max-width: 64rem; width: 100%;
}
@media (min-width: 960px) {
  .si-layout { grid-template-columns: 1fr 1fr; align-items: center; }
}

/* ===== Auth Card ===== */
.si-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2rem 1.75rem;
  box-shadow: 0 4px 24px -4px rgba(0,0,0,0.06);
}

.si-card-header { margin-bottom: 1.5rem; }
.si-heading {
  font-size: 1.25rem; font-weight: 700; letter-spacing: -0.01em;
  margin-bottom: 0.375rem;
}
.si-subtext { font-size: 0.8125rem; color: var(--muted-fg); line-height: 1.5; }

/* Tabs */
.si-tabs {
  display: flex; gap: 0; margin-bottom: 1.5rem;
  background: var(--muted); border-radius: 0.625rem; padding: 0.25rem;
}
.si-tab {
  flex: 1; padding: 0.5rem 0; font-size: 0.8125rem; font-weight: 500;
  border-radius: 0.5rem; color: var(--muted-fg);
  transition: all 0.2s;
}
.si-tab.active {
  background: var(--card); color: var(--fg);
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* Form */
.si-form { display: flex; flex-direction: column; gap: 1rem; }

.si-field { display: flex; flex-direction: column; gap: 0.375rem; }
.si-field label {
  font-size: 0.75rem; font-weight: 500; color: var(--muted-fg);
  letter-spacing: 0.01em;
}
.si-field input {
  height: 2.625rem; padding: 0 0.875rem;
  border: 1px solid var(--border); border-radius: 0.5rem;
  background: var(--bg); font-size: 0.875rem; color: var(--fg);
  outline: none; transition: all 0.2s;
}
.si-field input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px hsla(174, 55%, 40%, 0.12);
  background: var(--card);
}
.si-field input::placeholder { color: hsl(210, 10%, 70%); }

/* OTP toggle link */
.si-otp-toggle {
  font-size: 0.75rem; color: var(--primary); font-weight: 500;
  text-align: left; transition: opacity 0.15s; padding: 0;
}
.si-otp-toggle:hover { opacity: 0.7; }

/* OTP Section */
.si-otp-section {
  padding: 1rem; background: var(--muted); border-radius: 0.625rem;
  animation: siFadeIn 0.25s ease;
}
.si-otp-section label {
  font-size: 0.75rem; font-weight: 500; color: var(--muted-fg);
  display: block; margin-bottom: 0.5rem;
}
.si-otp-inputs {
  display: flex; gap: 0.5rem; justify-content: center; margin-bottom: 0.5rem;
}
.si-otp-digit {
  width: 2.75rem; height: 3rem;
  border: 1px solid var(--border); border-radius: 0.5rem;
  background: var(--card); text-align: center;
  font-size: 1.125rem; font-weight: 600; color: var(--fg);
  outline: none; transition: all 0.2s;
}
.si-otp-digit:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px hsla(174, 55%, 40%, 0.15);
}

.si-otp-meta {
  display: flex; justify-content: center; gap: 0.75rem; align-items: center;
}
.si-otp-timer { font-size: 0.6875rem; color: var(--muted-fg); }
.si-otp-resend {
  font-size: 0.6875rem; color: var(--primary); font-weight: 500;
  transition: opacity 0.15s; padding: 0;
}
.si-otp-resend:hover { opacity: 0.7; }

@keyframes siFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Submit */
.si-submit {
  height: 2.75rem; border-radius: 0.625rem;
  background: var(--primary); color: var(--primary-fg);
  font-size: 0.875rem; font-weight: 600;
  transition: opacity 0.15s;
}
.si-submit:hover { opacity: 0.92; }
.si-submit:disabled {
  opacity: 0.5; cursor: not-allowed;
}

.si-send-otp { background: var(--primary); }

/* Terms */
.si-terms-check {
  display: flex; align-items: flex-start; gap: 0.5rem;
  font-size: 0.75rem; color: var(--muted-fg); line-height: 1.5;
  cursor: pointer; animation: siFadeIn 0.25s ease;
}
.si-terms-check input { margin-top: 0.125rem; accent-color: var(--primary); flex-shrink: 0; }
.si-terms-check a { color: var(--primary); text-decoration: underline; }

/* Reassurance */
.si-reassurance {
  display: flex; align-items: center; gap: 0.375rem;
  font-size: 0.6875rem; color: var(--muted-fg);
  animation: siFadeIn 0.25s ease;
}

/* Footer links */
.si-form-footer { display: flex; justify-content: flex-end; }
.si-forgot {
  font-size: 0.75rem; color: var(--primary); font-weight: 500;
  transition: opacity 0.15s;
}
.si-forgot:hover { opacity: 0.7; }

/* Divider */
.si-divider {
  display: flex; align-items: center; gap: 0.75rem;
  margin: 0.5rem 0;
}
.si-divider::before, .si-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
.si-divider span { font-size: 0.6875rem; color: var(--muted-fg); white-space: nowrap; }

/* Switch button */
.si-switch-btn {
  height: 2.5rem; border-radius: 0.625rem;
  border: 1px solid var(--border);
  font-size: 0.8125rem; font-weight: 500; color: var(--fg);
  transition: all 0.15s;
}
.si-switch-btn:hover { background: var(--muted); border-color: hsla(174, 55%, 40%, 0.3); }

/* ===== Benefits Panel ===== */
.si-benefits {
  display: none;
  flex-direction: column; gap: 2rem;
  padding: 1rem 0;
}
@media (min-width: 960px) {
  .si-benefits { display: flex; padding-left: 2rem; }
}

.si-benefit {
  display: flex; gap: 1rem; align-items: flex-start;
}
.si-benefit-icon {
  width: 2.75rem; height: 2.75rem; border-radius: 0.75rem;
  background: var(--secondary); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.si-benefit h3 { font-size: 0.9375rem; font-weight: 600; margin-bottom: 0.25rem; }
.si-benefit p { font-size: 0.8125rem; color: var(--muted-fg); line-height: 1.5; }