/* ===== Design tokens ===== */
:root {
  --color-bg: #f4f5fb;
  --color-surface: #ffffff;
  --color-border: #e6e8f0;
  --color-text: #16172b;
  --color-muted: #6b7085;
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-primary-soft: #eef0ff;
  --color-danger: #e0335f;
  --radius-lg: 1rem;
  --radius-md: 0.65rem;
  --shadow-card: 0 20px 40px -20px rgba(30, 32, 60, 0.25), 0 2px 8px rgba(30, 32, 60, 0.06);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  background: var(--color-bg);
  background-image: radial-gradient(circle at 15% 0%, #e8e6ff 0%, transparent 45%),
    radial-gradient(circle at 100% 20%, #e3f6ff 0%, transparent 40%);
  background-attachment: fixed;
  color: var(--color-text);
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Malgun Gothic", sans-serif;
  font-size: 17px;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

main {
  flex: 1 0 auto;
}

/* ===== Navbar ===== */
.navbar {
  background: rgba(255, 255, 255, 0.75) !important;
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border) !important;
  box-shadow: none !important;
}

.navbar-brand {
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text) !important;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-brand::before {
  content: "";
  display: inline-block;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 0.5rem;
  background: linear-gradient(135deg, var(--color-primary), #8b5cf6);
}

.navbar .nav-link {
  font-weight: 500;
  color: var(--color-muted) !important;
  transition: color 0.15s ease;
}
.navbar .nav-link:hover {
  color: var(--color-text) !important;
}

/* ===== Footer ===== */
.footer {
  flex-shrink: 0;
  padding: 1.25rem 0;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.85rem;
  background: transparent;
}

/* ===== Auth pages (dedicated full-screen shell, no app chrome) ===== */
.auth-body {
  display: block;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

/* .auth-aside(왼쪽 소개 패널)에 있는 개인정보처리방침 링크는 900px 미만에서 aside 자체가
   숨겨지면서 같이 사라진다. 모바일에서도 접근 가능하도록 카드 아래에 별도로 노출한다. */
.auth-mobile-footer {
  display: block;
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.auth-aside {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  padding: 3rem;
  color: #fff;
  background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.12), transparent 45%),
    linear-gradient(160deg, #4338ca 0%, #4f46e5 45%, #7c3aed 100%);
}

.auth-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: #fff !important;
  text-decoration: none !important;
}
.auth-brand-mark {
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.95);
}

.auth-aside-content h2 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: 1rem;
}
.auth-aside-content p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  max-width: 26rem;
  margin-bottom: 1.75rem;
}

.auth-feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.auth-feature-list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.92);
}
.auth-feature-list li::before {
  content: "";
  flex-shrink: 0;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: #fff;
}

.auth-aside-footer {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.8rem;
}

.auth-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.5rem;
  background: var(--color-bg);
}

.auth-card {
  width: 100%;
  max-width: 560px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 3.5rem 3rem;
  animation: auth-card-in 0.35s ease;
}

@media (min-width: 900px) {
  .auth-shell {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
  .auth-aside {
    display: flex;
  }
  .auth-main {
    padding: 3rem;
  }
  .auth-mobile-footer {
    display: none;
  }
}

@keyframes auth-card-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.auth-card h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}

.auth-subtitle {
  color: var(--color-muted);
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-muted);
  font-size: 0.95rem;
  margin: 1.75rem 0 1.5rem;
}
.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.auth-footer-link {
  text-align: center;
  margin-top: 1.75rem;
  font-size: 1.05rem;
  color: var(--color-muted);
}

/* ===== Form controls ===== */
.form-floating {
  font-size: 1.05rem;
}
.form-floating > .form-control {
  border-radius: var(--radius-md);
  border-color: var(--color-border);
  background-color: #fbfbfe;
  height: calc(3.75rem + 2px);
  padding: 1.25rem 1rem;
}
.form-floating > .form-control:focus {
  background-color: var(--color-surface);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 0.2rem var(--color-primary-soft);
}
.form-floating > label {
  color: var(--color-muted);
  font-size: 1.05rem;
  padding: 1.1rem 1rem;
}

.text-danger {
  color: var(--color-danger) !important;
  font-size: 1rem;
}

.form-check-input:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}
.form-check-input:focus {
  box-shadow: 0 0 0 0.2rem var(--color-primary-soft);
}

/* ===== Buttons ===== */
.btn {
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1.05rem;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}

.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-primary:hover,
.btn-primary:active {
  background: var(--color-primary-dark) !important;
  border-color: var(--color-primary-dark) !important;
}
.btn-primary:focus, .btn:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.2rem var(--color-primary-soft);
}

/* Social login buttons */
.btn-social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1.05rem;
  border: 1px solid var(--color-border);
  padding: 0.85rem 1rem;
}
.btn-social svg {
  width: 1.4rem;
  height: 1.4rem;
  flex-shrink: 0;
}

.btn-social-google {
  background: #ffffff;
  color: #3c4043;
}
.btn-social-google:hover {
  background: #f7f7f8;
  color: #3c4043;
  border-color: #d2d5db;
}

.btn-social-naver {
  background: #03c75a;
  border-color: #03c75a;
  color: #ffffff;
}
.btn-social-naver:hover {
  background: #02b350;
  border-color: #02b350;
  color: #ffffff;
}

.btn-social-kakao {
  background: #fee500;
  border-color: #fee500;
  color: #191919;
}
.btn-social-kakao:hover {
  background: #f5dc00;
  border-color: #f5dc00;
  color: #191919;
}

/* ===== Home hero ===== */
.hero {
  padding: 5rem 1rem 4rem;
  text-align: center;
}
.hero .badge-soft {
  display: inline-block;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  font-weight: 600;
  font-size: 0.8rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}
.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}
.hero p {
  color: var(--color-muted);
  font-size: 1.05rem;
  max-width: 32rem;
  margin: 0 auto 2rem;
}
.hero .btn {
  min-width: 10rem;
}