:root {
  --bg: #1a1a1a;
  --panel: #1a1a1a;
  --input: #252525;
  --input-border: #333;
  --text: #ffffff;
  --muted: #a0a0a0;
  --yellow: #fbbd08;
  --yellow-hover: #e5ac00;
  --error: #ff6b6b;
  --success: #51cf66;
  --warning: #fcc419;
  --font: 'DM Sans', system-ui, sans-serif;
}

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

html, body {
  height: 100%;
}

.login-body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.login-shell {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(280px, 1.1fr);
  min-height: 100vh;
}

.login-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px clamp(32px, 8vw, 96px);
  max-width: 560px;
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 48px;
}

.brand-mark {
  display: block;
  width: 64px;
  height: 48px;
  flex-shrink: 0;
  object-fit: contain;
  background: transparent;
}

.brand-name {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-name .accent {
  color: var(--yellow);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.login-form label:not(.remember) {
  font-size: 0.95rem;
  font-weight: 500;
  margin-top: 8px;
}

.login-form input[type="email"],
.login-form input[type="text"]:not(.otp-digit) {
  background: var(--input);
  border: 1px solid var(--input-border);
  border-radius: 6px;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  padding: 14px 16px;
  outline: none;
  transition: border-color 0.15s ease;
}

.login-form input:focus {
  border-color: var(--yellow);
}

.step-email {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--yellow);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  margin-bottom: 20px;
}

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

.otp-timer {
  margin: 4px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.otp-timer strong {
  color: var(--yellow);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.otp-timer-warn strong {
  color: var(--error);
}

.otp-expired-msg {
  margin: 4px 0 0;
  font-size: 0.9rem;
  color: var(--error);
}

.muted-note {
  color: var(--muted);
  font-size: 0.85rem;
}

.btn-login:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.otp-digit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.otp-boxes {
  display: flex;
  gap: 10px;
  margin: 4px 0 8px;
}

.otp-digit {
  width: 48px;
  height: 56px;
  background: var(--input);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 1.35rem;
  font-weight: 700;
  text-align: center;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  caret-color: var(--yellow);
}

.otp-digit:focus {
  border-color: var(--yellow);
  box-shadow: 0 0 0 3px rgba(251, 189, 8, 0.18);
}

.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 12px 0 20px;
  gap: 12px;
}

.form-row-end {
  justify-content: flex-start;
}

.form-row .link-btn,
a.link-btn {
  background: none;
  border: none;
  color: var(--yellow);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  text-decoration: none;
}

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

@media (max-width: 420px) {
  .otp-boxes {
    gap: 6px;
  }
  .otp-digit {
    width: 42px;
    height: 50px;
    font-size: 1.2rem;
  }
}

.remember {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}

.remember input {
  width: 16px;
  height: 16px;
  accent-color: var(--yellow);
}

.link-btn {
  background: none;
  border: none;
  color: var(--yellow);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

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

.btn-login {
  width: 100%;
  background: var(--yellow);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 700;
  padding: 16px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.btn-login:hover {
  background: var(--yellow-hover);
}

.btn-login:active {
  transform: scale(0.99);
}

.hint {
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.85rem;
}

.footer-text {
  margin-top: 28px;
  font-size: 0.95rem;
  color: var(--text);
}

.footer-text a {
  color: var(--yellow);
  font-weight: 600;
  text-decoration: none;
}

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

.alert {
  border-radius: 6px;
  padding: 12px 14px;
  margin-bottom: 18px;
  font-size: 0.9rem;
  line-height: 1.4;
}

.alert-error {
  background: rgba(255, 107, 107, 0.12);
  color: var(--error);
  border: 1px solid rgba(255, 107, 107, 0.35);
}

.alert-success {
  background: rgba(81, 207, 102, 0.12);
  color: var(--success);
  border: 1px solid rgba(81, 207, 102, 0.35);
}

.alert-warning {
  background: rgba(252, 196, 25, 0.12);
  color: var(--warning);
  border: 1px solid rgba(252, 196, 25, 0.35);
}

.visual-panel {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 60% 45%, rgba(251, 189, 8, 0.07), transparent 55%),
    linear-gradient(155deg, #141414 0%, #1a1a1a 50%, #0e0e0e 100%);
}

.ai-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

.visual-fade {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(26, 26, 26, 0.85) 0%, rgba(26, 26, 26, 0.2) 18%, transparent 40%);
}

@media (max-width: 900px) {
  .login-shell {
    grid-template-columns: 1fr;
  }

  .visual-panel {
    display: none;
  }

  .login-panel {
    max-width: 480px;
    margin: 0 auto;
    padding: 40px 24px;
  }
}