:root {
  --bg: #121114;
  --panel: #1c1a21;
  --border: #302c39;
  --accent: #5b4a85;
  --accent-strong: #8672bb;
  --accent-soft: #322947;
  --text: #edebf2;
  --text-dim: #948e9f;
  --error: #c96a6a;
  --note-red: #8a4f4f;

  --font-display: 'Familjen Grotesk', 'Inter', sans-serif;
  --font-sans: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  overflow: hidden;
}

.scene {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

/* ---------- backdrop ---------- */

.backdrop {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  opacity: 0;
  animation: backdrop-in 1.8s ease-out 0.1s forwards;
}

@keyframes backdrop-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.mark-logo {
  position: absolute;
  right: -6vw;
  bottom: -10vh;
  top: auto;
  transform: none;
  width: 62vw;
  max-width: 1100px;
  min-width: 480px;
  height: auto;
  user-select: none;
  pointer-events: none;
  mask-image: linear-gradient(135deg, transparent 0%, transparent 15%, black 55%);
  -webkit-mask-image: linear-gradient(135deg, transparent 0%, transparent 15%, black 55%);
  transition: opacity 0.7s ease;
}

.mark-shine {
  mask-image:
    linear-gradient(135deg, transparent 0%, transparent 15%, black 55%),
    linear-gradient(70deg, transparent 44%, black 50%, transparent 56%);
  -webkit-mask-image:
    linear-gradient(135deg, transparent 0%, transparent 15%, black 55%),
    linear-gradient(70deg, transparent 44%, black 50%, transparent 56%);
  mask-composite: intersect;
  -webkit-mask-composite: source-in;
  mask-size: 100% 100%, 320% 100%;
  -webkit-mask-size: 100% 100%, 320% 100%;
  mask-repeat: no-repeat, no-repeat;
  -webkit-mask-repeat: no-repeat, no-repeat;
  mask-position: 0 0, -130% 0;
  -webkit-mask-position: 0 0, -130% 0;
  animation: shine-sweep 6.5s ease-in-out 1.8s infinite;
}

@keyframes shine-sweep {
  0%, 8% {
    mask-position: 0 0, -130% 0;
    -webkit-mask-position: 0 0, -130% 0;
  }
  100% {
    mask-position: 0 0, 130% 0;
    -webkit-mask-position: 0 0, 130% 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mark-shine {
    animation: none;
    display: none;
  }
}

.grid-lines {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, var(--border) 1px, transparent 1px);
  background-size: 120px 100%;
  opacity: 0.25;
  mask-image: linear-gradient(to right, black, transparent 70%);
  -webkit-mask-image: linear-gradient(to right, black, transparent 70%);
  transition: filter 0.8s ease, opacity 0.8s ease;
}

.backdrop.dim .mark-logo {
  opacity: 0;
}

.backdrop.dim .grid-lines {
  filter: blur(5px);
  opacity: 0.14;
}

/* ---------- auth panel ---------- */

.auth {
  position: relative;
  z-index: 2;
  width: min(380px, 88vw);
  margin-left: min(12vw, 140px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.auth-tilt {
  will-change: transform;
}

.brand {
  margin-bottom: 3.5rem;
  opacity: 0;
  animation: fade-up 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) 0.15s forwards;
}

.form .field:nth-of-type(1) {
  opacity: 0;
  animation: fade-up 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) 0.32s forwards;
}

.form .field:nth-of-type(2) {
  opacity: 0;
  animation: fade-up 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) 0.42s forwards;
}

.submit {
  opacity: 0;
  animation: fade-up 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) 0.54s forwards;
}

.footnote {
  opacity: 0;
  animation: fade-up 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) 0.66s forwards;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .backdrop,
  .brand,
  .form .field,
  .submit,
  .footnote {
    animation: none;
    opacity: 1;
  }
  .auth-tilt {
    transition: none;
  }
  .loading-line-fill.play {
    animation: none;
    width: 100%;
  }
}

.brand-mark {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.brand-mark .reg {
  font-size: 22px;
  font-weight: 500;
  vertical-align: super;
  margin-left: 4px;
  color: var(--text-dim);
}

.brand-sub {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

.form {
  transition: transform 0.25s ease;
}

.form.shake {
  animation: shake 0.4s ease;
}

@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-6px); }
  40%, 60% { transform: translateX(6px); }
}

.field {
  margin-bottom: 0.8rem;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.field-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 10px;
}

.field-row label {
  margin-bottom: 0;
}

.forgot-link {
  background: none;
  border: none;
  padding: 0 0 2px;
  font-size: 12px;
  font-family: var(--font-sans);
  color: var(--accent-strong);
  cursor: pointer;
  background-image: linear-gradient(var(--accent-strong), var(--accent-strong));
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0% 1px;
  transition: background-size 0.25s ease, color 0.25s ease;
}

.forgot-link:hover {
  color: var(--text);
  background-size: 100% 1px;
}

.forgot-note {
  max-height: 0;
  overflow: hidden;
  font-size: 12px;
  color: var(--note-red);
  margin: 0;
  opacity: 0;
  transition: max-height 0.3s ease, opacity 0.3s ease, margin 0.3s ease;
}

.forgot-note.visible {
  max-height: 60px;
  opacity: 1;
  margin: 0.7rem 0 0.9rem;
}

.field input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 16px;
  font-family: var(--font-sans);
  padding: 8px 0 10px;
  outline: none;
  transition: border-color 0.3s ease;
}

.field input:focus {
  border-color: var(--accent-strong);
}

.error {
  min-height: 18px;
  font-size: 13px;
  color: var(--error);
  margin: -0.2rem 0 0.5rem;
}

.submit {
  position: relative;
  width: 100%;
  padding: 15px 0;
  background: var(--accent);
  border: none;
  border-radius: 3px;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background 0.25s ease, transform 0.15s ease;
}

.submit:hover {
  background: var(--accent-strong);
}

.submit:active {
  transform: scale(0.99);
}

.submit-label {
  display: inline-block;
  transition: opacity 0.2s ease;
}

.submit-loader {
  display: none;
}

.submit.loading .submit-label {
  opacity: 0;
}

.submit.loading .submit-loader {
  display: flex;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.submit-loader span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text);
  opacity: 0.3;
  animation: pulse 1s infinite ease-in-out;
}

.submit-loader span:nth-child(2) { animation-delay: 0.15s; }
.submit-loader span:nth-child(3) { animation-delay: 0.3s; }

@keyframes pulse {
  0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
  40% { opacity: 1; transform: scale(1); }
}

.footnote {
  margin-top: 1.4rem;
  font-size: 12px;
  color: var(--text-dim);
}

/* ---------- loading screen ---------- */

.loading-screen {
  position: fixed;
  inset: 0;
  z-index: 15;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  opacity: 0;
  transform: scale(0.97);
  pointer-events: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.loading-screen.active {
  opacity: 1;
  transform: scale(1);
}

.loading-line-track {
  width: min(260px, 60vw);
  height: 1px;
  background: var(--border);
  position: relative;
  overflow: hidden;
}

.loading-line-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  background: var(--accent-strong);
}

.loading-line-fill.play {
  animation: line-fill 2s cubic-bezier(0.65, 0, 0.35, 1) forwards;
}

@keyframes line-fill {
  to { width: 100%; }
}

.loading-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin: 0;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.loading-screen.active .loading-caption {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.9s;
}

/* ---------- responsive ---------- */

@media (max-width: 720px) {
  .auth {
    margin-left: 0;
    padding: 0 8vw;
  }
  .mark-logo {
    right: -18vw;
    bottom: -6vh;
    width: 110vw;
    min-width: 0;
    opacity: 0.6;
  }
}

/* ---------- custom scrollbar ---------- */

* {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 5px;
  border: 2px solid var(--bg);
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-strong);
  background-clip: padding-box;
}

::-webkit-scrollbar-corner {
  background: transparent;
}