/* =========================================================
   LOGIN - login.html
   Five little friends gate the form: pat all 5, the door opens (js/login.js).
   ========================================================= */

:root {
  --login-bg: #07060d;
  --login-panel: rgba(21, 13, 33, .74);
  --login-line: rgba(216, 184, 255, .18);
  --login-line-strong: rgba(216, 184, 255, .48);
  --login-purple: #b778ff;
  --login-purple-soft: #d8b4ff;
  --login-text: #fbf7ff;
  --login-muted: rgba(236, 224, 250, .58);
  --login-error: #ff9db8;
  --login-ok: #b9f3d0;
}

* { box-sizing: border-box; }

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  color: var(--login-text);
  background: var(--login-bg);
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  overflow-x: hidden;
}

/* ---------- background: the living room, blurred into a night sky ---------- */
.login-sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: var(--login-bg);
  animation: top-fade-in var(--dur-xl) var(--ease-out) both;
}

.login-sky::before {
  content: "";
  position: absolute;
  inset: -48px;
  background:
    radial-gradient(circle at 50% 18%, rgba(140, 82, 214, .30), transparent 46%),
    radial-gradient(circle at 12% 88%, rgba(98, 52, 160, .26), transparent 40%),
    linear-gradient(180deg, rgba(9, 6, 18, .55), rgba(7, 5, 13, .92)),
    url("../image/previews/homepage.webp?v=2") center / cover no-repeat;
  filter: blur(20px) saturate(1.1);
}

.login-sky::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1.4px 1.4px at 12% 18%, rgba(255, 255, 255, .85), transparent 60%),
    radial-gradient(1px 1px at 28% 42%, rgba(255, 255, 255, .7), transparent 60%),
    radial-gradient(1.6px 1.6px at 46% 12%, rgba(230, 205, 255, .9), transparent 60%),
    radial-gradient(1px 1px at 64% 30%, rgba(255, 255, 255, .7), transparent 60%),
    radial-gradient(1.4px 1.4px at 82% 16%, rgba(255, 255, 255, .8), transparent 60%),
    radial-gradient(1px 1px at 90% 52%, rgba(230, 205, 255, .7), transparent 60%),
    radial-gradient(1.2px 1.2px at 8% 64%, rgba(255, 255, 255, .6), transparent 60%),
    radial-gradient(1px 1px at 72% 76%, rgba(255, 255, 255, .55), transparent 60%);
  animation: login-twinkle 4.8s ease-in-out infinite alternate;
}

@keyframes login-twinkle {
  from { opacity: .55; }
  to   { opacity: 1; }
}

/* ---------- layout ---------- */
.login-page {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: calc(var(--nav-h, 84px) + 28px) 16px 48px;
}

.login-card {
  position: relative;
  z-index: 20;
  width: min(420px, 100%);
  padding: 30px 28px 26px;
  border: 1px solid var(--login-line);
  border-radius: 28px;
  background: var(--login-panel);
  box-shadow:
    0 30px 80px rgba(3, 1, 8, .55),
    0 0 0 1px rgba(255, 255, 255, .03) inset,
    0 0 60px rgba(170, 100, 255, .10);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  animation: login-card-in var(--dur-xl) var(--ease-out) both;
}

@keyframes login-card-in {
  from { opacity: 0; transform: translateY(18px) scale(.97); }
  to   { opacity: 1; transform: none; }
}

.login-card[data-leaving] {
  animation: login-card-out var(--dur-l) var(--ease-in) both;
}

@keyframes login-card-out {
  from { opacity: 1; transform: none; }
  to   { opacity: 0; transform: translateY(-10px) scale(.97); }
}

.login-head > *,
.login-forms > *,
.login-welcome {
  animation: top-rise-in var(--dur-l) var(--ease-out) both;
}
.login-head > :nth-child(2) { animation-delay: 60ms; }
.login-head > :nth-child(3) { animation-delay: 110ms; }
.login-forms > :nth-child(1) { animation-delay: 160ms; }
.login-forms > :nth-child(2) { animation-delay: 210ms; }
.login-forms > :nth-child(3) { animation-delay: 260ms; }

.login-kicker {
  color: var(--login-purple);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .3em;
}

.login-title {
  margin: 10px 0 8px;
  font-family: "Noto Serif SC", "Songti SC", Georgia, serif;
  font-size: clamp(30px, 7vw, 38px);
  font-weight: 500;
  letter-spacing: .04em;
}

.login-lead {
  margin: 0 0 22px;
  color: var(--login-muted);
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- tabs with a sliding pill ---------- */
.login-tabs {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 4px;
  border: 1px solid var(--login-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .04);
}

.login-tabs-pill {
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 4px;
  width: calc(50% - 4px);
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(183, 120, 255, .38), rgba(140, 86, 230, .30));
  box-shadow: 0 6px 18px rgba(150, 90, 240, .25);
  transition: transform var(--dur-l) var(--ease-spring);
}

.login-forms[data-mode="signup"] .login-tabs-pill {
  transform: translateX(100%);
}

.login-tab {
  position: relative;
  z-index: 1;
  height: 38px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--login-muted);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .12em;
  cursor: pointer;
  transition: color var(--dur-m) var(--ease-out), transform var(--dur-s) var(--ease-out);
}

.login-tab[aria-selected="true"] { color: var(--login-text); }
.login-tab:active { transform: scale(.96); }

/* ---------- friends gate ---------- */
.flower-gate {
  display: grid;
  justify-items: center;
  gap: 8px;
  margin: 20px 0 6px;
}

/* the 5 friends, placed as in the original picture (2 above, 3 below) */
.friend-stage {
  position: relative;
  width: min(100%, 330px);
  aspect-ratio: 1321 / 938;
}

.friend {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--w);
  padding: 0;
  border: 0;
  border-radius: 14px;
  background: transparent;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  animation: top-rise-in var(--dur-l) var(--ease-out) both;
  transition: transform var(--dur-s) var(--ease-spring);
}

.friend:nth-child(2) { animation-delay: 60ms; }
.friend:nth-child(3) { animation-delay: 120ms; }
.friend:nth-child(4) { animation-delay: 180ms; }
.friend:nth-child(5) { animation-delay: 240ms; }

.friend img {
  display: block;
  width: 100%;
  height: auto;
  image-rendering: pixelated;
  transform-origin: 60% 100%;
  user-select: none;
  -webkit-user-drag: none;
  transition: filter var(--dur-m) var(--ease-out);
}

/* not patted yet: a quiet little breath */
.friend:not(.is-awake) img { animation: friend-breathe 2.4s ease-in-out infinite; }
.friend:nth-child(2n) img { animation-delay: -1.2s; }

@media (hover: hover) {
  .friend:hover { transform: scale(1.06); }
}
.friend:active { transform: scale(.94); }

.friend:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* patted: wide awake and glowing in its own colour */
.friend.is-awake img {
  filter: drop-shadow(0 0 10px color-mix(in srgb, var(--glow, #d8b4ff) 70%, transparent)) brightness(1.08);
}
.friend[data-friend="1"] { --glow: #6f9bff; }
.friend[data-friend="2"] { --glow: #ff6b6b; }
.friend[data-friend="3"] { --glow: #7dd67f; }
.friend[data-friend="4"] { --glow: #ffe066; }
.friend[data-friend="5"] { --glow: #ffb15e; }

@keyframes friend-breathe {
  0%, 100% { transform: scale(1, 1); }
  50%      { transform: scale(1.015, .975); }
}

.friend-bit {
  position: fixed;
  z-index: 60;
  width: 6px;
  height: 6px;
  background: var(--bit, #d8b4ff);
  pointer-events: none;
}

.flower-hint {
  margin: 0;
  color: var(--login-muted);
  font-size: 12px;
  letter-spacing: .04em;
  text-align: center;
  transition: color var(--dur-m) var(--ease-out);
}

.flower-gate.is-open .flower-hint { color: var(--login-purple-soft); }

/* ---------- form ---------- */
.login-form {
  display: grid;
  gap: 14px;
  margin-top: 14px;
}

.login-field {
  display: grid;
  gap: 7px;
}

.login-field > span:first-child {
  color: var(--login-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
}

.login-field input,
.login-select select {
  width: 100%;
  height: 46px;
  padding: 0 15px;
  border: 1px solid var(--login-line);
  border-radius: 14px;
  background: rgba(255, 255, 255, .055);
  color: var(--login-text);
  font: inherit;
  font-size: 15px;
  outline: none;
  transition:
    border-color var(--dur-s) var(--ease-out),
    background-color var(--dur-s) var(--ease-out),
    box-shadow var(--dur-s) var(--ease-out);
}

.login-field input:hover,
.login-select select:hover {
  border-color: rgba(216, 184, 255, .32);
}

.login-field input:focus,
.login-select select:focus {
  border-color: var(--login-purple);
  background: rgba(255, 255, 255, .08);
  box-shadow: 0 0 0 4px rgba(183, 120, 255, .16);
}

.login-field input[aria-invalid="true"] {
  border-color: rgba(255, 157, 184, .7);
}

.login-select {
  position: relative;
  display: block;
}

.login-select select {
  padding-right: 40px;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.login-select select option {
  background: #1a1027;
  color: var(--login-text);
}

.login-select .icon {
  position: absolute;
  right: 14px;
  top: 50%;
  color: var(--login-muted);
  transform: translateY(-50%);
  transition: transform var(--dur-s) var(--ease-out), color var(--dur-s) var(--ease-out);
}

.login-select:focus-within .icon {
  color: var(--login-purple-soft);
  transform: translateY(-50%) rotate(180deg);
}

.login-note {
  min-height: 0;
  color: var(--login-muted);
  font-size: 11px;
  transition: color var(--dur-s) var(--ease-out);
}

.login-note:empty { display: none; }
.login-note.is-ok { color: var(--login-ok); }
.login-note.is-bad { color: var(--login-error); }

/* sign-up-only fields and the province row open and close smoothly */
.login-signup-only,
.login-province {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition:
    grid-template-rows var(--dur-l) var(--ease-out),
    opacity var(--dur-m) var(--ease-out),
    margin var(--dur-l) var(--ease-out);
  margin-top: -14px;
  visibility: hidden;
}

.login-signup-inner,
.login-province-inner {
  display: grid;
  gap: 14px;
  min-height: 0;
  overflow: hidden;
}

.login-province { margin-top: -14px; }

.login-form[data-mode="signup"] .login-signup-only,
.login-province.is-open {
  grid-template-rows: 1fr;
  opacity: 1;
  margin-top: 0;
  visibility: visible;
}

/* focus rings need room inside the clipped area */
.login-signup-inner { padding: 4px; margin: -4px; }
.login-province-inner { padding: 4px; margin: -4px; }

.login-error {
  margin: 0;
  color: var(--login-error);
  font-size: 12.5px;
  text-align: center;
  animation: top-rise-in var(--dur-m) var(--ease-out) both;
}

.login-error:empty { display: none; }

/* ---------- buttons ---------- */
.login-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 50px;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, #c48dff, #8f56f0);
  box-shadow: 0 12px 30px rgba(140, 80, 235, .38);
  color: #fff;
  font: inherit;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .16em;
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  transition:
    transform var(--dur-s) var(--ease-out),
    box-shadow var(--dur-m) var(--ease-out),
    background var(--dur-l) var(--ease-out),
    color var(--dur-m) var(--ease-out),
    opacity var(--dur-s) var(--ease-out);
}

@media (hover: hover) {
  .login-button:not(.is-locked):hover {
    transform: translateY(-2px) scale(1.015);
    box-shadow: 0 16px 36px rgba(150, 90, 245, .48);
  }
}

.login-button:not(.is-locked):active { transform: scale(.97); }

.login-submit { width: 100%; }

.login-submit.is-locked {
  background: rgba(255, 255, 255, .07);
  box-shadow: none;
  color: var(--login-muted);
  cursor: not-allowed;
}

.login-submit.is-busy {
  opacity: .72;
  cursor: progress;
}

.login-submit-label {
  display: inline-block;
  transition: opacity var(--dur-s) var(--ease-out), transform var(--dur-s) var(--ease-out);
}

.login-submit-label.is-swapping {
  opacity: 0;
  transform: translateY(6px);
}

/* shine sweep when the door opens */
.login-submit.is-unlocking::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, .55) 50%, transparent 70%);
  transform: translateX(-100%);
  animation: login-shine 900ms var(--ease-out) both;
}

@keyframes login-shine {
  to { transform: translateX(100%); }
}

.login-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  height: 46px;
  padding: 0 18px;
  border: 1px solid var(--login-line);
  border-radius: 999px;
  background: transparent;
  color: var(--login-muted);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  cursor: pointer;
  transition:
    transform var(--dur-s) var(--ease-out),
    color var(--dur-s) var(--ease-out),
    border-color var(--dur-s) var(--ease-out);
}

@media (hover: hover) {
  .login-ghost:hover {
    color: var(--login-text);
    border-color: var(--login-line-strong);
  }
}

.login-ghost:active { transform: scale(.96); }

/* ---------- signed in ---------- */
.login-welcome {
  display: grid;
  justify-items: center;
  gap: 14px;
  text-align: center;
}

.login-avatar {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border: 1px solid var(--login-line-strong);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(214, 170, 255, .45), rgba(110, 60, 190, .35));
  box-shadow: 0 0 30px rgba(180, 120, 255, .35);
  font-size: 28px;
  animation: login-slot-pop var(--dur-xl) var(--ease-spring) both;
}

.login-welcome-copy {
  display: grid;
  gap: 4px;
}

.login-welcome-copy strong {
  font-size: 20px;
  letter-spacing: .04em;
}

.login-welcome-copy small {
  color: var(--login-muted);
  font-size: 12px;
  letter-spacing: .08em;
}

.login-welcome-actions {
  display: grid;
  width: 100%;
  gap: 10px;
  margin-top: 4px;
}

.login-notice {
  margin: 18px 0 0;
  padding: 12px 14px;
  border: 1px solid var(--login-line);
  border-radius: 14px;
  background: rgba(255, 255, 255, .04);
  color: var(--login-muted);
  font-size: 12.5px;
  line-height: 1.6;
  text-align: center;
  animation: top-rise-in var(--dur-m) var(--ease-out) both;
}

@media (prefers-reduced-motion: reduce) {
  .login-sky::after { animation: none; }
  .login-tabs-pill,
  .login-signup-only,
  .login-province { transition-duration: 1ms; }
  .friend,
  .friend img { animation: none; }
}

@media (max-width: 480px) {
  .login-page { padding-top: calc(var(--nav-h, 76px) + 16px); }
  .login-card { padding: 24px 18px 20px; border-radius: 24px; }
}