@import url("https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800;1,9..40,400&family=Syne:wght@700;800&display=swap");

*, *::before, *::after {
  margin: 0; padding: 0;
  box-sizing: border-box;
  text-decoration: none;
  list-style: none;
}

:root {
  --primary: #6C47FF;
  --primary-2: #8B6DFF;
  --primary-dark: #5035D4;
  --accent: #FF6B6B;
  --bg: #0D0E1A;
  --card: #13141F;
  --card-2: #1A1B2E;
  --input: #1E1F32;
  --input-border: rgba(108,71,255,0.18);
  --text: #C8C9D6;
  --heading: #F0F0FF;
  --muted: #7B7C9A;
  --toggle-bg: #6C47FF;
  --border: rgba(255,255,255,0.07);
}

body {
  font-family: 'DM Sans', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100svh;
  padding: 20px;
  background: var(--bg);
  overflow: hidden;
  position: relative;
}

/* Animated background */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 60% 50% at 20% -10%, rgba(108,71,255,0.22), transparent),
    radial-gradient(ellipse 55% 45% at 85% 110%, rgba(139,109,255,0.15), transparent),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(255,107,107,0.04), transparent);
}

/* Floating orbs */
body::after {
  content: "";
  position: fixed;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108,71,255,0.12), transparent 70%);
  top: -100px; right: -80px;
  animation: floatOrb 12s ease-in-out infinite;
  pointer-events: none; z-index: 0;
}

@keyframes floatOrb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, 30px) scale(1.1); }
}

.page {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 1;
}

.container {
  position: relative;
  width: min(920px, 100%);
  height: 580px;
  background: var(--card);
  border-radius: 28px;
  border: 1px solid var(--border);
  box-shadow:
    0 0 0 1px rgba(108,71,255,0.08),
    0 40px 80px rgba(0,0,0,0.55),
    0 0 120px rgba(108,71,255,0.08);
  overflow: hidden;
}

/* Typography */
.container h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  color: var(--heading);
  letter-spacing: -0.5px;
  margin-bottom: 4px;
  line-height: 1.15;
}

.sub {
  color: var(--muted);
  font-size: clamp(13px, 1.5vw, 14px);
  margin: 8px 0 20px;
  font-weight: 400;
}

.tiny {
  color: var(--muted);
  font-size: 12px;
  margin-top: 16px;
  opacity: 0.75;
}

form { width: 100%; }

/* Form Boxes */
.form-box {
  position: absolute;
  top: 0; right: 0;
  width: 50%; height: 100%;
  background: var(--card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  text-align: center;
  padding: clamp(20px, 4vw, 48px);
  z-index: 3;
  transition: transform 0.65s cubic-bezier(0.76, 0, 0.24, 1), visibility 0s 0.32s;
}

.form-box form {
  width: 100%;
  max-width: 360px;
}

.container.active .form-box.login {
  transform: translateX(-100%);
}

.form-box.register {
  transform: translateX(100%);
  visibility: hidden;
  pointer-events: none;
}

.container.active .form-box.register {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
  transition: transform 0.65s cubic-bezier(0.76, 0, 0.24, 1), visibility 0s 0s;
}

/* Status messages */
.status {
  min-height: 16px;
  font-size: 13px;
  margin: 4px 0 10px;
  color: var(--text);
  border-radius: 10px;
  transition: all 0.2s;
}

.status.show {
  padding: 10px 14px;
  border: 1px solid transparent;
}

.status.show.ok {
  color: #4ade80;
  border-color: rgba(74,222,128,0.25);
  background: rgba(74,222,128,0.08);
}

.status.show.err {
  color: #f87171;
  border-color: rgba(248,113,113,0.25);
  background: rgba(248,113,113,0.08);
}

/* Input Box */
.input-box {
  position: relative;
  margin: 14px 0;
}

.input-box input {
  width: 100%;
  padding: 14px 48px 14px 18px;
  background: var(--input);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
  outline: none;
  font-size: 15px;
  font-family: 'DM Sans', sans-serif;
  color: var(--heading);
  font-weight: 500;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-box input:focus {
  border-color: rgba(108,71,255,0.55);
  box-shadow: 0 0 0 4px rgba(108,71,255,0.14);
}

.input-box input::placeholder {
  color: var(--muted);
  font-weight: 400;
}

.input-box i {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--muted);
  transition: color 0.2s;
}

.input-box:focus-within i {
  color: var(--primary-2);
}

/* Buttons */
.btn {
  width: 100%;
  height: 50px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-radius: 12px;
  border: none;
  cursor: pointer;
  font-size: 15px;
  font-family: 'DM Sans', sans-serif;
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(108,71,255,0.32);
  transition: transform 0.22s ease, box-shadow 0.22s ease, opacity 0.2s;
}

.btn::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.14), transparent 60%);
  opacity: 0;
  transition: opacity 0.2s;
}

.btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(108,71,255,0.40);
}

.btn:hover:not(:disabled)::before { opacity: 1; }

.btn:active:not(:disabled) { transform: translateY(0); }

.btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

/* Ghost buttons (toggle panel) */
.btn.ghost {
  background: transparent;
  border: 2px solid rgba(255,255,255,0.85);
  box-shadow: none;
  font-family: 'DM Sans', sans-serif;
}

.btn.ghost:hover:not(:disabled) {
  background: rgba(255,255,255,0.12);
  box-shadow: none;
}

/* Loader */
.btn-loader {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 2.5px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  display: none;
  animation: spin 0.75s linear infinite;
}

.btn.loading .btn-loader { display: inline-block; }
.btn.loading .btn-text { opacity: 0.8; }

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

/* Toggle Box */
.toggle-box {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.toggle-box::before {
  content: "";
  position: absolute;
  left: -250%;
  width: 300%;
  height: 100%;
  background: linear-gradient(145deg, var(--primary), var(--primary-dark) 60%, #8B2FE0);
  border-radius: 150px;
  transition: left 1.15s cubic-bezier(0.76, 0, 0.24, 1);
  pointer-events: none;
}

.container.active .toggle-box::before {
  left: 50%;
}

.toggle-panel {
  position: absolute;
  width: 50%;
  height: 100%;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 20px;
  gap: 10px;
  pointer-events: none;
}

.toggle-panel h1 {
  font-family: 'Syne', sans-serif;
  color: #fff;
  font-size: clamp(20px, 2.8vw, 30px);
}

.toggle-panel p {
  color: rgba(255,255,255,0.85);
  font-size: 14px;
}

.toggle-panel .btn {
  pointer-events: auto;
  width: auto;
  padding: 0 28px;
}

.toggle-panel.toggle-left { left: 0; }
.toggle-panel.toggle-right { right: 0; }

/* ===================== MOBILE ===================== */
@media (max-width: 650px) {
  body { padding: 0; overflow: hidden; }

  .container {
    width: 100%;
    height: 100svh;
    border-radius: 0;
    border: none;
  }

  .form-box {
    width: 100%;
    height: 70%;
    top: auto; bottom: 0;
    transform: translateX(0);
    padding: 20px 24px 28px;
    border-radius: 28px 28px 0 0;
    background: var(--card);
    border-top: 1px solid var(--border);
  }

  .form-box.register {
    transform: translateY(110%);
    visibility: hidden;
    pointer-events: none;
  }

  .container.active .form-box.login {
    transform: translateY(110%);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.65s cubic-bezier(0.76, 0, 0.24, 1), visibility 0s 0.65s;
  }

  .container.active .form-box.register {
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.65s cubic-bezier(0.76, 0, 0.24, 1), visibility 0s 0s;
  }

  .toggle-box::before {
    left: 0; top: -280%;
    width: 100%; height: 300%;
    border-radius: 30vw;
    transition: top 1.15s cubic-bezier(0.76, 0, 0.24, 1);
  }

  .container.active .toggle-box::before {
    left: 0; top: 70%;
  }

  .toggle-panel {
    width: 100%;
    height: 30%;
  }

  .toggle-panel.toggle-left { top: 0; left: 0; }
  .toggle-panel.toggle-right { bottom: -30%; right: 0; }

  .container.active .toggle-panel.toggle-left { top: -30%; }
  .container.active .toggle-panel.toggle-right { bottom: 0; }
}

@media (max-width: 380px) {
  .input-box input { font-size: 14px; padding: 12px 44px 12px 14px; }
  .toggle-panel h1 { font-size: 20px; }
  .container h1 { font-size: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}