/* ============================================================
   REVVY — Login Page
   Split-screen: Dark automotive stage × warm paper form
   Requires: design-system.css loaded first
   ============================================================ */

/* ── Page-level tokens ──────────────────────────────────── */
:root {
  --stage-bg:    #141210;
  --stage-light: rgba(255,255,255,0.025);
  --grain-url: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='256' height='256'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
}

/* ══════════════════════════════════════════════════════════
   SPLIT LAYOUT
══════════════════════════════════════════════════════════ */
.login-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
}

/* ══════════════════════════════════════════════════════════
   LEFT: DARK STAGE
══════════════════════════════════════════════════════════ */
.login-stage {
  position: relative;
  background: var(--stage-bg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(2rem, 4vw, 3.5rem);
  overflow: hidden;
}

.stage-grain {
  position: absolute;
  inset: 0;
  background: var(--grain-url) repeat;
  opacity: 0.035;
  pointer-events: none;
  z-index: 1;
}

.stage-light {
  position: absolute;
  top: 0; left: 0;
  width: 80%; height: 70%;
  background: radial-gradient(ellipse at 15% 20%, rgba(212,168,42,0.06) 0%, transparent 60%);
  pointer-events: none;
  z-index: 1;
}

.stage-type {
  position: absolute;
  bottom: -0.08em;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--f-display);
  font-size: clamp(10rem, 20vw, 24rem);
  font-weight: var(--fw-bold);
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,0.03);
  white-space: nowrap;
  pointer-events: none;
  z-index: 0;
  line-height: 1;
  user-select: none;
}

@keyframes carFloat {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(-6px); }
}

.stage-content {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: space-between;
}

/* Logo */
.stage-logo {
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1;
  opacity: 0;
  transform: translateY(14px);
  animation: loginFadeUp 0.6s var(--ease-out) 0.1s forwards;
}

.stage-logo-mark {
  font-family: var(--f-display);
  font-size: 24px;
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-wide);
  color: #fff;
}

.stage-logo-sub {
  font-family: var(--f-mono);
  font-size: 8px;
  letter-spacing: var(--ls-extreme);
  color: rgba(255,255,255,0.28);
  text-transform: uppercase;
}

/* Stage pitch */
.stage-pitch {
  padding: clamp(3rem, 6vh, 6rem) 0;
}

.stage-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: clamp(1.2rem, 2vw, 2rem);
  opacity: 0;
  transform: translateY(14px);
  animation: loginFadeUp 0.6s var(--ease-out) 0.2s forwards;
}

.stage-kicker-rule {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--color-red);
  flex-shrink: 0;
}

.stage-kicker-text {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
}

.stage-heading {
  display: flex;
  flex-direction: column;
  line-height: 0.92;
}

.stage-h-line {
  display: block;
  font-family: var(--f-display);
  font-size: clamp(3rem, 6.5vw, 6.5rem);
  font-weight: var(--fw-bold);
  letter-spacing: -0.025em;
  text-transform: uppercase;
  color: #fff;
  line-height: 0.93;
  opacity: 0;
  transform: translateY(18px);
  animation: loginFadeUp 0.65s var(--ease-out) forwards;
}

.stage-h-line:nth-child(1) { animation-delay: 0.3s; }
.stage-h-line:nth-child(2) { animation-delay: 0.4s; }
.stage-h-line:nth-child(3) { animation-delay: 0.5s; }

.stage-h-dash {
  font-style: normal;
  color: var(--color-red);
}

.stage-h-line--outline {
  -webkit-text-stroke: 1.5px rgba(255,255,255,0.5);
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.stage-accent {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-red);
  z-index: 4;
}

/* ══════════════════════════════════════════════════════════
   RIGHT: FORM SIDE
══════════════════════════════════════════════════════════ */
.login-form-side {
  display: flex;
  flex-direction: column;
  padding: clamp(1.5rem, 3vw, 2.5rem) clamp(2rem, 5vw, 5rem);
  background: var(--color-bg);
  position: relative;
}

.login-form-side::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(14,12,10,0.04) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
  z-index: 0;
}

.login-form-side > * {
  position: relative;
  z-index: 1;
}

/* Top bar */
.form-topbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  margin-bottom: auto;
  opacity: 0;
  animation: loginFadeIn 0.5s var(--ease-out) 0.3s forwards;
}

.form-topbar-text {
  font-family: var(--f-body);
  font-size: 13px;
  color: var(--color-ink-dim);
}

.form-topbar-link {
  font-family: var(--f-body);
  font-size: 13px;
  font-weight: var(--fw-semi);
  color: var(--color-red);
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s;
  text-decoration: none;
}

.form-topbar-link:hover {
  border-color: var(--color-red);
}

/* Form container */
.form-container {
  width: 100%;
  max-width: 400px;
  margin: auto 0;
  padding: clamp(2rem, 4vh, 4rem) 0;
}

/* Form header */
.form-header {
  margin-bottom: clamp(1.5rem, 3vh, 2.5rem);
  opacity: 0;
  transform: translateY(16px);
  animation: loginFadeUp 0.6s var(--ease-out) 0.15s forwards;
}

.form-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 1rem;
}

.form-kicker-rule {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-red);
  flex-shrink: 0;
}

.form-kicker-text {
  font-family: var(--f-mono);
  font-size: 9px;
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-ink-dim);
}

.form-title {
  font-family: var(--f-serif);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: var(--fw-bold);
  line-height: 1.15;
  color: var(--color-ink);
}

.form-title em {
  font-style: italic;
  color: var(--color-red);
}

/* Flash messages (server-rendered alerts for success/verification) */
.login-alert {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  font-family: var(--f-body);
  font-size: 13px;
  animation: loginShakeIn 0.4s var(--ease-out);
}

.login-alert--success {
  background: rgba(34, 139, 34, 0.06);
  border: 1px solid rgba(34, 139, 34, 0.18);
  border-left: 3px solid #228b22;
  color: #228b22;
}

.login-alert--error {
  background: rgba(198, 26, 20, 0.06);
  border: 1px solid rgba(198, 26, 20, 0.18);
  border-left: 3px solid var(--color-red);
  color: var(--color-red);
}

/* AJAX error message */
.form-error[hidden] {
  display: none;
}

.form-error {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(198, 26, 20, 0.06);
  border: 1px solid rgba(198, 26, 20, 0.18);
  border-left: 3px solid var(--color-red);
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  font-family: var(--f-body);
  font-size: 13px;
  color: var(--color-red);
  animation: loginShakeIn 0.4s var(--ease-out);
}

/* ── Form fields ──────────────────────────────────────── */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field--email    { opacity: 0; transform: translateY(14px); animation: loginFadeUp 0.5s 0.3s var(--ease-out) forwards; }
.field--password { opacity: 0; transform: translateY(14px); animation: loginFadeUp 0.5s 0.45s var(--ease-out) forwards; }

.field-label-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.field-label {
  font-family: var(--f-mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-ink-dim);
}

.field-forgot {
  font-family: var(--f-body);
  font-size: 12px;
  color: var(--color-ink-dim);
  transition: color 0.18s;
  text-decoration: none;
}

.field-forgot:hover {
  color: var(--color-red);
}

/* Input wrapper */
.field-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.field-icon {
  position: absolute;
  left: 14px;
  width: 16px;
  height: 16px;
  color: var(--color-ink-dim);
  pointer-events: none;
  flex-shrink: 0;
  transition: color 0.2s;
}

.field-input {
  width: 100%;
  padding: 13px 14px 13px 42px;
  background: var(--color-surface);
  border: 1.5px solid var(--color-rule);
  border-radius: var(--radius-sm);
  font-family: var(--f-body);
  font-size: 16px;
  color: var(--color-ink);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.field-input::placeholder {
  color: var(--color-ink-xdim);
  font-weight: var(--fw-regular);
}

.field-input:focus {
  border-color: var(--color-ink);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(14,12,10,0.06);
}

.field-input:focus ~ .field-icon,
.field-input-wrap:focus-within .field-icon {
  color: var(--color-ink);
}

.field-input.error {
  border-color: var(--color-red);
  background: rgba(198, 26, 20, 0.03);
}

.field-input.error:focus {
  box-shadow: 0 0 0 3px rgba(198, 26, 20, 0.08);
}

/* Password toggle */
.field-toggle {
  position: absolute;
  right: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  color: var(--color-ink-dim);
  border-radius: var(--radius-xs);
  transition: color 0.18s, background 0.18s;
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
  padding: 0;
}

.field-toggle:hover {
  color: var(--color-ink);
  background: rgba(14,12,10,0.04);
}

/* Remember me */
.remember-row {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
  opacity: 0;
  transform: translateY(10px);
  animation: loginFadeUp 0.5s var(--ease-out) 0.55s forwards;
}

.remember-check {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.remember-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--color-rule);
  border-radius: 4px;
  background: var(--color-surface);
  color: transparent;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  flex-shrink: 0;
}

.remember-check:checked + .remember-box {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-bg);
}

.remember-check:focus-visible + .remember-box {
  box-shadow: 0 0 0 3px rgba(14,12,10,0.1);
}

.remember-text {
  font-family: var(--f-body);
  font-size: 13px;
  color: var(--color-ink-mid);
}

/* ── Submit button ───────────────────────────────────── */
.login-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 14px 24px;
  margin-top: 0.4rem;
  background: var(--color-ink);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--f-display);
  font-size: 14px;
  font-weight: var(--fw-semi);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #fff;
  cursor: pointer;
  transition: background 0.22s, box-shadow 0.22s, transform 0.18s;
  opacity: 0;
  transform: translateY(10px);
  animation: loginFadeUp 0.5s var(--ease-out) 0.65s forwards;
}

.login-btn:hover {
  background: var(--color-red);
  box-shadow: 0 6px 20px rgba(198,26,20,0.3);
  transform: translateY(-1px);
}

.login-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(198,26,20,0.2);
}

.login-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.login-btn:disabled:hover {
  background: var(--color-ink);
  box-shadow: none;
  transform: none;
}

.login-btn-spinner {
  animation: loginSpin 0.8s linear infinite;
}

@keyframes loginSpin {
  to { transform: rotate(360deg); }
}

/* ══════════════════════════════════════════════════════════
   ANIMATIONS
══════════════════════════════════════════════════════════ */
@keyframes loginFadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes loginFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes loginShakeIn {
  0%   { transform: translateX(-8px); opacity: 0; }
  40%  { transform: translateX(4px); }
  70%  { transform: translateX(-2px); }
  100% { transform: translateX(0); opacity: 1; }
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════════════ */

/* Tablet: stage becomes a top banner */
@media (max-width: 1024px) {
  .login-split {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    min-height: auto;
  }

  .login-stage {
    min-height: 340px;
    padding: clamp(1.5rem, 3vw, 2.5rem);
  }

  .stage-pitch {
    padding: 2rem 0 1rem;
  }

  .stage-h-line {
    font-size: clamp(2.5rem, 8vw, 5rem);
  }

  .stage-type {
    font-size: clamp(6rem, 16vw, 14rem);
  }

  .login-form-side {
    padding: clamp(1.5rem, 3vw, 2.5rem) clamp(2rem, 6vw, 6rem);
  }

  .form-container {
    max-width: 440px;
    margin: 0 auto;
    padding: 2rem 0;
  }
}

/* Mobile */
@media (max-width: 640px) {
  .login-stage {
    min-height: 260px;
    padding: 1.5rem;
  }

  .login-form-side {
    padding: 1.5rem;
  }

  .form-topbar {
    justify-content: center;
    margin-bottom: 0;
  }

  .stage-type {
    left: 75%;
  }
}

/* Small mobile */
@media (max-width: 400px) {
  .stage-h-line {
    font-size: 2.2rem;
  }

  .form-title {
    font-size: 1.6rem;
  }
}