/* NOVACLASS — landing + login pages */
:root {
  --p: #5b4ee6; --p2: #7b6cff; --p3: #d9d4ff; --ink: #17153a; --tx: #4a4870; --mut: #8a88a8;
  --ok: #12a26b; --bad: #e0384f; --line: rgba(23, 21, 58, .1);
  --ease: cubic-bezier(.22, 1, .36, 1); --spring: cubic-bezier(.34, 1.56, .64, 1);
  --font: "Be Vietnam Pro", "Segoe UI", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body { font-family: var(--font); color: var(--tx); background: #f7f6ff; font-size: 15px; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: var(--p); }
button, input { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--p2); outline-offset: 2px; }
svg.i { width: 1.15em; height: 1.15em; vertical-align: middle; flex-shrink: 0; }

/* animated background */
.sky { position: fixed; inset: 0; z-index: 0; overflow: hidden; background: linear-gradient(160deg, #fbfaff 0%, #eeeaff 55%, #e2f4fb 100%); }
.sky i { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .55; animation: blob 22s ease-in-out infinite alternate; }
.sky .b1 { width: 52vmax; height: 52vmax; background: #b8afff; left: -14vmax; top: -18vmax; }
.sky .b2 { width: 44vmax; height: 44vmax; background: #9fe3f2; right: -12vmax; top: 18vmax; animation-duration: 28s; animation-direction: alternate-reverse; }
.sky .b3 { width: 40vmax; height: 40vmax; background: #ffc6e0; left: 30vmax; bottom: -26vmax; animation-duration: 34s; }
.sky .grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(91, 78, 230, .06) 1px, transparent 1px), linear-gradient(90deg, rgba(91, 78, 230, .06) 1px, transparent 1px); background-size: 46px 46px; mask-image: radial-gradient(circle at 50% 40%, #000 0, transparent 75%); }
.sky .star { position: absolute; width: 6px; height: 6px; border-radius: 50%; background: #fff; box-shadow: 0 0 12px 3px rgba(123, 108, 255, .55); animation: twinkle 4s ease-in-out infinite; }
@keyframes blob { 50% { transform: translate(5vmax, 4vmax) scale(1.08); } 100% { transform: translate(-4vmax, 7vmax) scale(.95); } }
@keyframes twinkle { 50% { opacity: .2; transform: scale(.6); } }
@keyframes rise { from { opacity: 0; transform: translateY(18px); filter: blur(6px); } }
@keyframes pop { from { opacity: 0; transform: scale(.92) translateY(14px); } }
.rise { animation: rise .8s var(--ease) both; animation-delay: calc(var(--d, 0) * 90ms + 80ms); }

/* brand */
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 800; font-size: 19px; letter-spacing: .03em; }
.brand b { color: var(--p); }
.logo { width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center; background: linear-gradient(140deg, #8b7dff, #3b2fc9); box-shadow: 0 8px 18px -8px #3b2fc9; }
.logo svg { width: 21px; fill: none; stroke: #fff; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 18px; border-radius: 12px; border: 1px solid var(--line); background: #fff; color: var(--ink); font-weight: 600; font-size: 15px; text-decoration: none; cursor: pointer; transition: transform .2s var(--ease), box-shadow .25s, border-color .2s, background .2s; position: relative; overflow: hidden; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 22px -12px rgba(23, 21, 58, .4); border-color: rgba(91, 78, 230, .35); }
.btn:active { transform: scale(.98); }
.btn.pri { background: linear-gradient(140deg, var(--p2), var(--p)); color: #fff; border-color: transparent; box-shadow: 0 10px 24px -10px var(--p); }
.btn.pri:hover { filter: brightness(1.06); }
.btn.full { width: 100%; }
.btn[disabled] { opacity: .65; pointer-events: none; }
.btn .spin { width: 18px; height: 18px; border: 2.5px solid rgba(255, 255, 255, .45); border-top-color: #fff; border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- login ---------- */
.auth { position: relative; z-index: 1; min-height: 100vh; display: grid; grid-template-columns: 1.1fr 1fr; }
.auth-side { padding: 44px 56px; display: flex; flex-direction: column; }
.auth-side h1 { font-size: clamp(30px, 3.6vw, 46px); line-height: 1.15; color: var(--ink); margin: auto 0 14px; letter-spacing: -.02em; }
.auth-side h1 em { font-style: normal; background: linear-gradient(90deg, #5b4ee6, #18a3c9); -webkit-background-clip: text; background-clip: text; color: transparent; }
.auth-side > p { max-width: 460px; line-height: 1.7; margin: 0 0 26px; }
.perks { display: grid; gap: 12px; margin-bottom: auto; max-width: 460px; }
.perk { display: flex; gap: 12px; align-items: center; padding: 12px 14px; border-radius: 14px; background: rgba(255, 255, 255, .7); border: 1px solid rgba(255, 255, 255, .9); box-shadow: 0 8px 22px -16px rgba(23, 21, 58, .4); backdrop-filter: blur(8px); }
.perk span { width: 36px; height: 36px; border-radius: 11px; display: grid; place-items: center; background: #efedff; color: var(--p); flex-shrink: 0; }
.perk b { display: block; color: var(--ink); font-size: 14.5px; }
.perk small { color: var(--mut); font-size: 13px; }
.auth-foot { font-size: 13px; color: var(--mut); margin-top: 30px; }
.auth-main { display: grid; place-items: center; padding: 30px 24px; }
.panel { width: min(440px, 100%); background: rgba(255, 255, 255, .92); border: 1px solid #fff; border-radius: 24px; padding: 30px 30px 26px; box-shadow: 0 40px 90px -40px rgba(43, 32, 140, .55), 0 2px 6px rgba(23, 21, 58, .05); backdrop-filter: blur(16px); animation: pop .7s var(--spring) both .1s; }
.panel h2 { margin: 0; font-size: 24px; color: var(--ink); letter-spacing: -.01em; }
.panel .lead { margin: 6px 0 18px; color: var(--mut); font-size: 14px; }
.tabs { position: relative; display: grid; grid-template-columns: 1fr 1fr; padding: 4px; border-radius: 14px; background: #f1f0fa; margin-bottom: 20px; }
.tabs button { position: relative; z-index: 1; border: 0; background: none; padding: 10px; font-weight: 600; font-size: 14px; color: var(--mut); cursor: pointer; transition: color .3s; border-radius: 10px; }
.tabs button.on { color: var(--ink); }
.tabs .thumb { position: absolute; top: 4px; bottom: 4px; left: 4px; width: calc(50% - 4px); border-radius: 10px; background: #fff; box-shadow: 0 4px 12px -6px rgba(23, 21, 58, .35); transition: transform .45s var(--spring); }
.tabs.reg .thumb { transform: translateX(100%); }
.social { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.social .btn { font-size: 14px; padding: 11px 12px; }
.social svg { width: 19px; height: 19px; }
.or { display: flex; align-items: center; gap: 12px; color: var(--mut); font-size: 12.5px; margin: 18px 0; }
.or::before, .or::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.forms { position: relative; overflow: hidden; transition: height .45s var(--ease); }
form { display: grid; gap: 12px; }
form.hide { position: absolute; inset: 0 0 auto; visibility: hidden; opacity: 0; pointer-events: none; }
form { transition: opacity .35s var(--ease), transform .45s var(--ease); }
form.hide.l { transform: translateX(-30px); }
form.hide.r { transform: translateX(30px); }
.fld { display: grid; gap: 6px; font-size: 13px; font-weight: 600; color: var(--ink); }
.inp { position: relative; }
.inp > svg { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); color: var(--mut); width: 18px; height: 18px; pointer-events: none; transition: color .2s; }
.inp input { width: 100%; height: 48px; border: 1.5px solid var(--line); border-radius: 12px; padding: 0 44px 0 42px; font-size: 15px; background: #fbfbff; outline: none; transition: border-color .2s, box-shadow .2s, background .2s; font-weight: 400; }
.inp input:focus { border-color: var(--p2); background: #fff; box-shadow: 0 0 0 4px rgba(123, 108, 255, .16); }
.inp input:focus ~ svg { color: var(--p); }
.inp .eye { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); width: 36px; height: 36px; border: 0; background: none; border-radius: 9px; color: var(--mut); cursor: pointer; display: grid; place-items: center; }
.inp .eye:hover { background: #f1f0fa; color: var(--ink); }
.inp.err input { border-color: var(--bad); }
.meter { height: 5px; border-radius: 5px; background: #eceaf6; overflow: hidden; margin-top: 2px; }
.meter i { display: block; height: 100%; width: 0; border-radius: 5px; transition: width .4s var(--ease), background .3s; }
.hint { font-size: 12px; color: var(--mut); font-weight: 400; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 10px; font-size: 13.5px; }
.chk { display: inline-flex; gap: 8px; align-items: center; cursor: pointer; font-weight: 400; color: var(--tx); }
.chk input { accent-color: var(--p); width: 16px; height: 16px; }
.msg { display: none; padding: 11px 13px; border-radius: 12px; font-size: 13.5px; line-height: 1.5; }
.msg.show { display: flex; gap: 8px; animation: pop .4s var(--spring); }
.msg.err { background: #fde8eb; color: #b3203a; }
.msg.ok { background: #e3f8ee; color: #0d6e48; }
.shake { animation: shake .4s ease; }
@keyframes shake { 20%, 60% { transform: translateX(-7px); } 40%, 80% { transform: translateX(7px); } }
.legal { font-size: 12px; color: var(--mut); text-align: center; margin: 16px 0 0; line-height: 1.6; }
.back { position: absolute; top: 22px; right: 26px; z-index: 2; font-size: 14px; text-decoration: none; color: var(--tx); display: inline-flex; gap: 6px; align-items: center; padding: 8px 12px; border-radius: 10px; background: rgba(255, 255, 255, .7); }

@media (max-width: 960px) {
  .auth { grid-template-columns: 1fr; }
  .auth-side { padding: 26px 22px 0; }
  .auth-side h1 { margin-top: 26px; font-size: 30px; }
  .perks, .auth-side > p, .auth-foot { display: none; }
  .auth-main { padding: 18px 14px 40px; place-items: start center; }
  .panel { padding: 24px 20px 20px; border-radius: 20px; }
  .back { top: 22px; right: 16px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; } }