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

:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --surface-2: #f0f0f2;
  --border: #e0e0e4;
  --border-soft: #ececf0;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --accent: #f24b3d;
  --accent-hover: #d93a2d;
  --accent-light: #fef2f2;
  --muted: #6e6e73;
  --white: #ffffff;
  --black: #1d1d1f;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.dark {
  --bg: #111113;
  --surface: #1c1c1e;
  --surface-2: #252527;
  --border: #38383a;
  --border-soft: #2c2c2e;
  --text: #f5f5f7;
  --text-secondary: #98989d;
  --accent: #f24b3d;
  --accent-hover: #e84a3c;
  --accent-light: #2d1515;
  --muted: #98989d;
  --white: #1c1c1e;
  --black: #f5f5f7;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.4);
}

body.dark {
  background: var(--bg);
}

button,
input {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.auth-showcase {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  position: relative;
  overflow: hidden;
}

.auth-showcase::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(242, 75, 61, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.03) 0%, transparent 50%);
}

.showcase-inner {
  max-width: 480px;
  position: relative;
  z-index: 1;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 40px;
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}

.brand-name {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: rgba(255,255,255,0.6);
}

.showcase-copy .quote-text {
  font-size: 28px;
  line-height: 1.35;
  font-style: italic;
  letter-spacing: -0.3px;
  color: rgba(255,255,255,0.95);
  margin-bottom: 16px;
  font-weight: 400;
}

.showcase-copy .quote-author {
  font-size: 15px;
  color: rgba(255,255,255,0.5);
  font-weight: 400;
}

.showcase-copy h1 {
  font-size: 48px;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: #ffffff;
  margin-bottom: 20px;
  font-weight: 700;
}

.lead {
  font-size: 17px;
  line-height: 1.6;
  color: rgba(255,255,255,0.55);
  max-width: 420px;
}

.auth-panel-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.auth-panel {
  width: 100%;
  max-width: 420px;
}

.auth-panel-head {
  margin-bottom: 28px;
}

.auth-panel-head h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
}

.auth-panel-head p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.5;
}

.auth-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 28px;
}

.switch-btn {
  height: 40px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
}

.switch-btn.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.auth-form {
  display: none;
}

.auth-form.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.input-shell {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  min-height: 48px;
  padding: 0 14px;
  transition: all 0.2s ease;
}

.input-shell i {
  color: var(--text-secondary);
  font-size: 15px;
  width: 16px;
  text-align: center;
}

.input-shell input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 15px;
}

.input-shell input::placeholder {
  color: var(--text-secondary);
}

.input-shell:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(242, 75, 61, 0.1);
}

.forgot-link-wrap {
  text-align: right;
  margin-top: -8px;
  margin-bottom: 12px;
}

.forgot-link {
  font-size: 13px;
  color: var(--accent);
  cursor: pointer;
  transition: opacity 0.2s;
}

.forgot-link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.primary-btn {
  width: 100%;
  height: 48px;
  border: none;
  background: var(--accent);
  color: #ffffff;
  cursor: pointer;
  transition: all 0.2s ease;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  margin-top: 4px;
}

.primary-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.primary-btn:active {
  transform: translateY(0);
}

.auth-message {
  min-height: 24px;
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.6;
}

.auth-message.success {
  color: #10B981;
}

.auth-message.error {
  color: var(--accent);
}

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

  .auth-showcase {
    display: none;
  }

  .auth-panel-wrap {
    padding: 24px 20px;
  }
}