/* KBio 로그인 — 라이트 글래스모피즘 · 좌 3D / 우 폼 */

:root {
  --kbio-bg: #e8f4fc;
  --kbio-bg-2: #dceefb;
  --kbio-ink: #0b1220;
  --kbio-ink-soft: #4b5568;
  --kbio-blue: #2563eb;
  --kbio-blue-bright: #3b82f6;
  --kbio-magenta: #c026d3;
  --kbio-violet: #7c3aed;
  --kbio-glass: rgba(255, 255, 255, 0.55);
  --kbio-glass-border: rgba(255, 255, 255, 0.85);
  --kbio-radius: 20px;
  --kbio-radius-pill: 999px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body.kbio-login-page {
  margin: 0;
  min-height: 100vh;
  overflow: hidden;
  font-family: "IBM Plex Sans KR", system-ui, sans-serif;
  color: var(--kbio-ink);
  background: radial-gradient(ellipse 120% 80% at 20% 20%, #f0f9ff 0%, var(--kbio-bg) 45%, #e0f2fe 100%);
}

body.kbio-login-page.kbio-3d-ready {
  background: radial-gradient(ellipse 100% 90% at 30% 40%, #f8fcff 0%, #e8f4fc 50%, #dbeafe 100%);
}

/* ── 스플릿 레이아웃 ── */
.kbio-login-split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
  min-height: 100vh;
  min-height: 100dvh;
}

/* ── 좌측: Spline + 히어로 카피 ── */
.kbio-login-visual {
  position: relative;
  overflow: hidden;
  border-right: 1px solid rgba(255, 255, 255, 0.6);
}

/* Three.js / Spline 3D 캔버스 */
.kbio-3d-mount {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.kbio-3d-mount .kbio-3d-canvas,
.kbio-3d-mount .kbio-spline-layer canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.kbio-spline-layer {
  position: absolute;
  inset: 0;
}

.kbio-login-visual__bokeh {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(circle at 75% 30%, rgba(147, 197, 253, 0.35) 0%, transparent 45%),
    radial-gradient(circle at 15% 70%, rgba(186, 230, 253, 0.4) 0%, transparent 40%);
  filter: blur(2px);
}

.kbio-login-visual__wash {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(
    100deg,
    rgba(232, 244, 252, 0.15) 0%,
    rgba(255, 255, 255, 0.02) 50%,
    rgba(219, 234, 254, 0.35) 100%
  );
}

/* 글래스 디스크 장식 (참고 이미지 느낌) */
.kbio-glass-orb {
  position: absolute;
  z-index: 3;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
  border-radius: 50%;
  pointer-events: none;
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  border: 1px solid rgba(255, 255, 255, 0.75);
  box-shadow:
    0 8px 32px rgba(37, 99, 235, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.kbio-glass-orb--1 {
  width: 120px;
  height: 120px;
  top: 18%;
  right: 12%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.7), rgba(59, 130, 246, 0.12));
}

.kbio-glass-orb--2 {
  width: 68px;
  height: 68px;
  bottom: 28%;
  right: 28%;
  background: radial-gradient(circle at 40% 35%, rgba(255, 255, 255, 0.65), rgba(192, 38, 211, 0.1));
}

.kbio-glass-orb--3 {
  width: 200px;
  height: 200px;
  bottom: 8%;
  left: 8%;
  opacity: 0.55;
  background: radial-gradient(circle at 50% 40%, rgba(255, 255, 255, 0.5), rgba(124, 58, 237, 0.08));
}

.kbio-login-hero {
  position: relative;
  z-index: 4;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
  max-width: 520px;
  padding: clamp(48px, 8vh, 96px) clamp(32px, 6vw, 72px);
  animation: kbio-hero-in 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes kbio-hero-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.kbio-login-hero__tag {
  margin: 0 0 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--kbio-blue);
}

.kbio-login-hero__title {
  margin: 0 0 1.25rem;
  font-size: clamp(2.75rem, 6vw, 4.25rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--kbio-ink);
}

.kbio-login-hero__lead {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--kbio-ink-soft);
  max-width: 38ch;
}

/* ── 우측: 로그인 글래스 패널 ── */
.kbio-login-auth {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(24px, 4vw, 56px);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.4) 0%, rgba(244, 246, 251, 0.85) 100%);
}

.kbio-login-panel {
  position: relative;
  width: min(100%, 400px);
  transform: perspective(900px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
  transform-style: preserve-3d;
  transition: transform 0.2s ease-out;
  animation: kbio-panel-in 0.65s 0.1s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes kbio-panel-in {
  from {
    opacity: 0;
    transform: translateX(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.kbio-login-panel__glass {
  position: absolute;
  inset: -20px -16px;
  border-radius: calc(var(--kbio-radius) + 12px);
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(59, 130, 246, 0.12), transparent 70%);
  pointer-events: none;
}

.kbio-login-panel__body {
  position: relative;
  padding: 2rem 1.75rem 1.5rem;
  border-radius: var(--kbio-radius);
  background: var(--kbio-glass);
  backdrop-filter: blur(24px) saturate(1.5);
  -webkit-backdrop-filter: blur(24px) saturate(1.5);
  border: 1px solid var(--kbio-glass-border);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.5) inset,
    0 24px 64px rgba(15, 23, 42, 0.08),
    0 4px 24px rgba(37, 99, 235, 0.06);
}

.kbio-login-panel__head {
  margin-bottom: 1.5rem;
}

.kbio-login-eyebrow {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--kbio-blue);
}

.kbio-login-panel__title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--kbio-ink);
}

.kbio-login-alerts {
  margin-bottom: 1rem;
}

.kbio-login-alert {
  padding: 0.55rem 0.8rem;
  border-radius: 12px;
  font-size: 0.84rem;
}

.kbio-login-alert--danger {
  background: rgba(254, 226, 226, 0.9);
  color: #b91c1c;
  border: 1px solid rgba(248, 113, 113, 0.4);
}

.kbio-login-alert--success {
  background: rgba(220, 252, 231, 0.9);
  color: #15803d;
  border: 1px solid rgba(74, 222, 128, 0.4);
}

.kbio-login-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.kbio-field__label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: #374151;
}

.kbio-field__input {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--kbio-ink);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(148, 163, 184, 0.35);
  border-radius: 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.kbio-field__input::placeholder {
  color: #9ca3af;
}

.kbio-field__input:focus {
  border-color: var(--kbio-blue-bright);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
  background: #fff;
}

/* 참고 이미지 스타일 — 블루 필 버튼 */
.kbio-login-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  height: 52px;
  margin-top: 0.25rem;
  padding: 0 1.5rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  border: none;
  border-radius: var(--kbio-radius-pill);
  cursor: pointer;
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 55%, #1d4ed8 100%);
  box-shadow:
    0 8px 24px rgba(37, 99, 235, 0.35),
    0 0 0 1px rgba(255, 255, 255, 0.2) inset;
  transition: transform 0.2s, box-shadow 0.2s;
}

.kbio-login-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.42);
}

.kbio-login-submit svg {
  transition: transform 0.2s;
}

.kbio-login-submit:hover svg {
  transform: translateX(3px);
}

.kbio-login-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(148, 163, 184, 0.2);
}

.kbio-login-back {
  font-size: 0.84rem;
  color: var(--kbio-ink-soft);
  text-decoration: none;
}

.kbio-login-back:hover {
  color: var(--kbio-blue);
}

.kbio-login-footer__meta {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #9ca3af;
}

/* 레거시 / 403 */
.kbio-login-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.kbio-login-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--kbio-ink);
}

.kbio-login-lead {
  color: var(--kbio-ink-soft);
}

.kbio-error-code {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--kbio-blue);
}

.kbio-error-detail {
  font-size: 0.85rem;
  color: var(--kbio-ink-soft);
}

@media (max-width: 900px) {
  .kbio-login-split {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    overflow-y: auto;
  }

  body.kbio-login-page {
    overflow: auto;
  }

  .kbio-login-visual {
    min-height: 42vh;
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.7);
  }

  .kbio-login-hero {
    padding: 32px 24px 24px;
  }

  .kbio-login-hero__title {
    font-size: 2.25rem;
  }

  .kbio-glass-orb--3 {
    display: none;
  }

  .kbio-login-auth {
    padding: 24px 20px 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kbio-login-hero,
  .kbio-login-panel {
    animation: none;
  }
}