/* ScienceHUB Login — 3dprint.mmh-virtual.jp/login 準拠 UI */

:root {
  --color-primary: #f38020;
  --color-primary-hover: #e5700f;
  --color-bg: #ffffff;
  --color-text: #1d2433;
  --color-border: #e2e5e9;
  --color-muted: #6b7280;
  --color-surface: #f6f6f7;
  --color-success: #16a34a;
  --color-error: #dc2626;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --site-header-offset: 57px;
}

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

.hidden {
  display: none !important;
}

.hint {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.6;
}

.alert {
  padding: 0.875rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.alert-success {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: var(--color-success);
}

.alert-error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--color-error);
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.site-title:hover {
  text-decoration: none;
}

.site-title span {
  color: var(--color-primary);
}

/* Login page */
.login-page-body {
  min-height: 100vh;
  background: var(--color-surface);
}

.login-page-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.25rem 3rem;
  min-height: calc(100vh - var(--site-header-offset));
}

.login-page-layout {
  width: 100%;
}

.login-hero {
  display: none;
}

.auth-page-wrap {
  width: min(100%, 26rem);
  margin: 0 auto;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  overflow: hidden;
  background: var(--color-surface);
}

.auth-tab {
  border: none;
  background: transparent;
  padding: 0.85rem 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  color: var(--color-muted);
  transition: color 0.15s, background 0.15s;
}

.auth-tab.active {
  background: var(--color-bg);
  color: var(--color-primary);
  box-shadow: inset 0 -2px 0 var(--color-primary);
}

.auth-tab:not(.active):hover {
  color: var(--color-text);
  background: color-mix(in srgb, var(--color-primary) 6%, var(--color-surface));
}

.auth-card {
  border: 1px solid var(--color-border);
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--color-bg);
  padding: 1.5rem 1.25rem 1.25rem;
  box-shadow: var(--shadow);
}

#auth-main-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  background: var(--color-bg);
}

#auth-main-card .auth-tabs {
  border: none;
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
}

#auth-main-card .auth-card {
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.auth-panels {
  display: grid;
  grid-template-areas: "panel";
}

.auth-tab-panel {
  grid-area: panel;
  display: flex;
  flex-direction: column;
}

.auth-tab-panel.is-inactive {
  visibility: hidden;
  pointer-events: none;
  opacity: 0;
}

.auth-form .form-group {
  margin-bottom: 1rem;
}

.auth-form label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
}

.auth-form input[type="email"],
.auth-form input[type="password"],
.auth-form input[type="text"] {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.625rem 0.75rem;
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.auth-form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(243, 128, 32, 0.15);
}

.auth-submit-btn {
  width: 100%;
  border: none;
  border-radius: var(--radius);
  background: var(--color-primary);
  color: #fff;
  padding: 0.625rem 1rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  margin-top: 0.25rem;
  transition: background 0.15s;
}

.auth-submit-btn:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.auth-submit-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.auth-oauth-row {
  display: flex;
  flex-direction: row;
  gap: 0.75rem;
}

.auth-oauth-btn-icon {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  padding: 0.625rem 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, border-color 0.15s;
}

.auth-oauth-btn-icon:hover {
  background: var(--color-bg);
  border-color: var(--color-primary);
}

.oauth-icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.25rem 0 1rem;
  color: var(--color-muted);
  font-size: 0.8rem;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.auth-profile-card {
  padding: 1.75rem;
}

.auth-profile-title {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  font-weight: 700;
}

.auth-profile-lead {
  margin: 0 0 1.25rem;
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.auth-profile-footer {
  margin: 1.25rem 0 0;
  text-align: center;
  font-size: 0.85rem;
}

.auth-profile-footer a {
  color: var(--color-muted);
  text-decoration: none;
}

.auth-profile-footer a:hover {
  color: var(--color-primary);
}

@media (max-width: 480px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.signup-lead {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.signup-hint {
  margin: 0;
}

/* Desktop split layout */
@media (min-width: 769px) {
  .login-page-body {
    background: var(--color-bg);
  }

  .login-page-main {
    align-items: stretch;
    justify-content: stretch;
    padding: 0;
    min-height: calc(100vh - var(--site-header-offset));
  }

  .login-header-inner {
    max-width: none;
    padding-left: 2rem;
    padding-right: 2rem;
  }

  .login-page-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) min(440px, 42vw);
    min-height: calc(100vh - var(--site-header-offset));
  }

  .login-hero {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 3rem clamp(2.5rem, 5vw, 4.5rem);
    overflow: hidden;
    background: var(--color-bg);
    border-right: 1px solid var(--color-border);
  }

  .login-hero-accent {
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-primary);
  }

  .login-hero-layers {
    position: absolute;
    right: clamp(1.5rem, 4vw, 3rem);
    bottom: clamp(2rem, 6vh, 4rem);
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
  }

  .login-hero-layers span {
    display: block;
    height: 3px;
    border-radius: 2px;
    background: var(--color-primary);
    opacity: 0.12;
  }

  .login-hero-layers span:nth-child(1) { width: 7rem; }
  .login-hero-layers span:nth-child(2) { width: 5.5rem; margin-left: 1rem; }
  .login-hero-layers span:nth-child(3) { width: 4rem; margin-left: 2rem; }
  .login-hero-layers span:nth-child(4) { width: 2.5rem; margin-left: 3rem; }

  .login-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 22rem;
  }

  .login-hero-school {
    margin: 0 0 0.625rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-muted);
    letter-spacing: 0.04em;
  }

  .login-hero-club {
    display: inline-block;
    margin: 0 0 1.25rem;
    padding: 0.3rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 10%, var(--color-bg));
    border: 1px solid color-mix(in srgb, var(--color-primary) 28%, var(--color-border));
    border-radius: 999px;
  }

  .login-hero-title {
    margin: 0 0 1.25rem;
    font-size: clamp(1.875rem, 3vw, 2.375rem);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
  }

  .login-hero-title span {
    color: var(--color-primary);
  }

  .login-hero-lead {
    margin: 0 0 1rem;
    font-size: 0.9375rem;
    line-height: 1.75;
    color: var(--color-muted);
  }

  .login-hero-note {
    margin: 0;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--color-muted);
  }

  .login-page-form-col {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 2rem;
    background: var(--color-surface);
  }

  .auth-page-wrap {
    width: min(100%, 26rem);
    margin: 0;
  }

  #auth-main-card {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  }
}

@media (max-width: 768px) {
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
  }

  body.login-page-body {
    padding-top: var(--site-header-offset);
  }
}