@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700;900&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Noto Sans JP', sans-serif;
}

:root {
  --purple: #4230B4;
  --pink: #E12C8A;
  --gradient: linear-gradient(135deg, #4230B4 0%, #E12C8A 100%);
  --dark: #0a0a0a;
  --white: #ffffff;
  --gray: #888888;
  --light: #f5f5f5;
  --border: #e8e8e8;
}

body {
  background: var(--white);
  color: var(--dark);
  min-height: 100vh;
}

/* ===== ヘッダー ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-dark {
  background: transparent;
}

.header-light {
  background: rgba(255,255,255,0.95);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.logo-badge {
  background: var(--dark);
  color: var(--white);
  padding: 5px 12px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.logo-dark .logo-badge {
  background: var(--white);
  color: var(--dark);
}

.logo-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: -0.3px;
}

.logo-dark .logo-text {
  color: var(--white);
}

.logo-text em {
  font-style: normal;
  color: var(--pink);
}

.logo-dark .logo-text em {
  color: var(--pink);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.header-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--dark);
  text-decoration: none;
  transition: color 0.2s;
}

.header-dark .header-nav a {
  color: rgba(255,255,255,0.7);
}

.header-nav a:hover {
  color: var(--pink);
}

.header-dark .header-nav a:hover {
  color: var(--white);
}

/* ===== ボタン ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.25s;
  letter-spacing: 0.3px;
}

.btn-dark {
  background: var(--dark);
  color: var(--white);
}

.btn-dark:hover {
  background: #222;
}

.btn-white {
  background: var(--white);
  color: var(--pink);
  font-weight: 700;
}

.btn-white:hover {
  background: rgba(255,255,255,0.9);
}

.btn-pink {
  background: var(--pink);
  color: var(--white);
}

.btn-pink:hover {
  background: #c9227a;
}

.btn-outline-white {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.5);
}

.btn-outline-white:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.1);
}

.btn-full { width: 100%; }

/* ===== フッター（スライド風） ===== */
.slide-footer {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  padding: 16px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  letter-spacing: 0.5px;
  pointer-events: none;
  z-index: 50;
}

.slide-footer-dark {
  color: rgba(255,255,255,0.4);
}

.slide-footer-light {
  color: rgba(0,0,0,0.3);
}

.footer-logo-mark {
  width: 16px;
  height: 16px;
  background: rgba(255,255,255,0.3);
  border-radius: 2px;
}

.footer-logo-mark-dark {
  background: rgba(0,0,0,0.15);
}

/* ===== ログインページ ===== */
.login-page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

/* 左パネル - ダークグラデーション */
.login-left {
  background: linear-gradient(135deg, #4230B4 0%, #E12C8A 100%);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 80px 64px;
  overflow: hidden;
  min-height: 100vh;
}

.login-left-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.login-left-shape1 {
  position: absolute;
  top: -10%;
  left: -10%;
  width: 70%;
  height: 70%;
  background: rgba(255,255,255,0.06);
  clip-path: polygon(20% 0%, 80% 0%, 100% 60%, 60% 100%, 0% 80%);
}

.login-left-shape2 {
  position: absolute;
  bottom: -5%;
  right: -5%;
  width: 60%;
  height: 60%;
  background: rgba(0,0,0,0.1);
  clip-path: polygon(40% 0%, 100% 20%, 100% 100%, 0% 100%, 20% 50%);
}

.login-left-content {
  position: relative;
  z-index: 1;
}

.login-left-tag {
  display: inline-block;
  background: rgba(0,0,0,0.3);
  color: var(--white);
  padding: 6px 14px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 32px;
}

.login-left-title {
  font-size: 52px;
  font-weight: 900;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.login-left-title em {
  font-style: normal;
  display: block;
  color: rgba(255,255,255,0.7);
  font-size: 32px;
  font-weight: 300;
  letter-spacing: 0px;
  margin-top: 8px;
}

.login-left-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  line-height: 1.8;
  max-width: 360px;
}

/* 右パネル - ホワイト */
.login-right {
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 64px;
  min-height: 100vh;
}

.login-form-container {
  width: 100%;
  max-width: 380px;
}

.login-form-title {
  font-size: 32px;
  font-weight: 900;
  color: var(--dark);
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.login-form-sub {
  font-size: 14px;
  color: var(--gray);
  margin-bottom: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  background: var(--white);
  border: 1.5px solid var(--border);
  font-size: 15px;
  color: var(--dark);
  transition: border-color 0.2s;
  outline: none;
  border-radius: 0;
}

.form-input:focus {
  border-color: var(--purple);
}

.form-input::placeholder {
  color: #bbb;
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  font-size: 13px;
}

.form-options a {
  color: var(--gray);
  text-decoration: none;
}

.form-options a:hover {
  color: var(--pink);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gray);
  cursor: pointer;
  font-size: 13px;
}

.checkbox-label input {
  accent-color: var(--purple);
  width: 14px;
  height: 14px;
}

.login-error {
  background: #fff0f5;
  border-left: 3px solid var(--pink);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--pink);
  margin-bottom: 20px;
  display: none;
}

.login-footer-note {
  margin-top: 24px;
  font-size: 12px;
  color: #bbb;
  text-align: center;
}

.login-footer-note span {
  font-weight: 700;
  color: var(--dark);
}

/* ===== コース一覧ページ ===== */
.courses-page {
  min-height: 100vh;
}

/* ヒーロー */
.courses-hero {
  background: linear-gradient(135deg, #4230B4 0%, #E12C8A 100%);
  padding: 160px 80px 100px;
  position: relative;
  overflow: hidden;
}

.courses-hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-shape1 {
  position: absolute;
  top: -20%;
  right: -5%;
  width: 55%;
  height: 120%;
  background: rgba(255,255,255,0.05);
  clip-path: polygon(20% 0%, 100% 0%, 100% 100%, 40% 100%);
}

.hero-shape2 {
  position: absolute;
  bottom: -30%;
  left: 30%;
  width: 40%;
  height: 80%;
  background: rgba(0,0,0,0.08);
  clip-path: polygon(30% 0%, 100% 20%, 70% 100%, 0% 80%);
}

.courses-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
}

.courses-hero-tag {
  display: inline-block;
  background: rgba(0,0,0,0.25);
  color: rgba(255,255,255,0.9);
  padding: 6px 16px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.courses-hero-title {
  font-size: 64px;
  font-weight: 900;
  color: var(--white);
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 20px;
}

.courses-hero-title em {
  font-style: normal;
  color: rgba(255,255,255,0.5);
}

.courses-hero-desc {
  font-size: 15px;
  color: rgba(255,255,255,0.65);
  line-height: 1.8;
  max-width: 480px;
}

/* 統計バー */
.stats-bar {
  background: var(--dark);
  padding: 28px 80px;
}

.stats-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 60px;
}

.stat-item {}

.stat-num {
  font-size: 28px;
  font-weight: 900;
  color: var(--white);
  letter-spacing: -0.5px;
}

.stat-num span {
  color: var(--pink);
}

.stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  margin-top: 2px;
  letter-spacing: 0.5px;
}

/* コンテンツエリア */
.courses-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 80px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 60px;
}

.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--pink);
  margin-bottom: 24px;
}

/* コースカード */
.course-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border);
}

.course-card {
  background: var(--white);
  padding: 36px 40px;
  display: flex;
  gap: 32px;
  cursor: pointer;
  transition: background 0.2s;
  text-decoration: none;
  color: inherit;
}

.course-card:hover {
  background: #fafafa;
}

.course-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--pink);
  min-width: 40px;
  padding-top: 4px;
  letter-spacing: 1px;
}

.course-body {
  flex: 1;
  border-bottom: 1px solid var(--border);
  padding-bottom: 36px;
}

.course-card:last-child .course-body {
  border-bottom: none;
  padding-bottom: 0;
}

.course-vol {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 8px;
}

.course-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.4;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.course-desc {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.7;
  margin-bottom: 16px;
}

.course-meta {
  display: flex;
  gap: 20px;
  font-size: 12px;
  color: #aaa;
}

.progress-wrap {
  margin-top: 12px;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: #bbb;
  margin-bottom: 6px;
}

.progress-bar {
  height: 3px;
  background: var(--border);
}

.progress-fill {
  height: 100%;
  background: var(--pink);
  transition: width 0.5s;
}

.course-arrow {
  display: flex;
  align-items: center;
  color: #ccc;
  font-size: 20px;
  transition: color 0.2s;
}

.course-card:hover .course-arrow {
  color: var(--pink);
}

.course-locked {
  opacity: 0.4;
  pointer-events: none;
}

/* サイドバー */
.sidebar {}

.sidebar-card {
  border: 1px solid var(--border);
  padding: 32px;
  margin-bottom: 20px;
}

.sidebar-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--dark);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--dark);
}

.profile-section {
  text-align: center;
  margin-bottom: 24px;
}

.profile-avatar {
  width: 64px;
  height: 64px;
  background: var(--light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 12px;
  border: 2px solid var(--border);
}

.profile-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--dark);
}

.profile-role {
  font-size: 12px;
  color: var(--gray);
  margin-top: 2px;
}

.profile-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}

.profile-stat {
  background: var(--light);
  padding: 14px;
  text-align: center;
}

.profile-stat-num {
  font-size: 24px;
  font-weight: 900;
  color: var(--pink);
  letter-spacing: -0.5px;
}

.profile-stat-label {
  font-size: 11px;
  color: var(--gray);
  margin-top: 2px;
}

.notice-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.notice-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.notice-date {
  font-size: 11px;
  color: var(--pink);
  font-weight: 700;
  margin-bottom: 4px;
}

.notice-text {
  font-size: 13px;
  color: var(--dark);
  line-height: 1.5;
}

/* ===== レッスンページ ===== */
.lesson-hero {
  background: linear-gradient(135deg, #4230B4 0%, #E12C8A 100%);
  padding: 120px 80px 60px;
  position: relative;
  overflow: hidden;
}

.lesson-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--white);
}

.lesson-hero-title {
  font-size: 42px;
  font-weight: 900;
  color: var(--white);
  line-height: 1.2;
  letter-spacing: -1px;
  max-width: 700px;
}

.lesson-meta-bar {
  display: flex;
  gap: 24px;
  margin-top: 20px;
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}

/* レッスンコンテンツ */
.lesson-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 60px 40px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  background: var(--dark);
  margin-bottom: 40px;
}

.video-container iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: none;
}

.video-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a0a3d, #3a1050);
  color: white;
  gap: 16px;
}

.play-btn {
  width: 64px;
  height: 64px;
  background: var(--pink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s;
}

.play-btn:hover {
  transform: scale(1.08);
  background: #c9227a;
}

.lesson-desc-block {
  padding: 28px 32px;
  background: var(--light);
  border-left: 3px solid var(--pink);
  margin-bottom: 40px;
  font-size: 14px;
  color: var(--dark);
  line-height: 1.8;
}

/* クイズ */
.quiz-wrap {}

.quiz-section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--pink);
  text-transform: uppercase;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--dark);
}

.quiz-question {
  font-size: 16px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
  line-height: 1.5;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.quiz-option {
  padding: 14px 20px;
  border: 1.5px solid var(--border);
  background: var(--white);
  cursor: pointer;
  font-size: 14px;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 14px;
  transition: border-color 0.2s, background 0.2s;
}

.quiz-option:hover {
  border-color: var(--purple);
  background: #f8f6ff;
}

.quiz-option.selected {
  border-color: var(--purple);
  background: #f0ecff;
}

.quiz-option.correct {
  border-color: #4caf50;
  background: #f0fff0;
}

.quiz-option.wrong {
  border-color: var(--pink);
  background: #fff0f5;
}

.option-letter {
  width: 24px;
  height: 24px;
  border: 1.5px solid #ccc;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.quiz-result {
  padding: 14px 20px;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  display: none;
}

.quiz-result.pass {
  background: #f0fff0;
  border-left: 3px solid #4caf50;
  color: #2e7d32;
}

.quiz-result.fail {
  background: #fff0f5;
  border-left: 3px solid var(--pink);
  color: var(--pink);
}

.complete-banner {
  background: linear-gradient(135deg, #4230B4, #E12C8A);
  color: white;
  padding: 40px;
  text-align: center;
  margin-top: 32px;
  display: none;
}

.complete-banner h3 {
  font-size: 24px;
  font-weight: 900;
  margin-bottom: 8px;
}

.complete-banner p {
  font-size: 14px;
  opacity: 0.8;
  margin-bottom: 24px;
}

/* レッスンサイドバー */
.lesson-sidebar {}

.lesson-list-card {
  border: 1px solid var(--border);
  margin-bottom: 20px;
}

.lesson-list-header {
  padding: 20px 24px;
  background: var(--dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--white);
  text-transform: uppercase;
}

.lesson-list-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  transition: background 0.2s;
}

.lesson-list-item:last-child {
  border-bottom: none;
}

.lesson-list-item:hover {
  background: #fafafa;
}

.lesson-list-item.active {
  background: #f8f6ff;
  border-left: 3px solid var(--purple);
}

.lesson-list-num {
  width: 26px;
  height: 26px;
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--gray);
  flex-shrink: 0;
}

.lesson-list-num.active {
  background: var(--purple);
  border-color: var(--purple);
  color: white;
}

.lesson-list-num.done {
  background: var(--pink);
  border-color: var(--pink);
  color: white;
}

.lesson-list-info {}

.lesson-list-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--dark);
  line-height: 1.4;
}

.lesson-list-meta {
  font-size: 11px;
  color: var(--gray);
  margin-top: 2px;
}

/* レスポンシブ */
@media (max-width: 960px) {
  .login-page {
    grid-template-columns: 1fr;
  }

  .login-left {
    min-height: 40vh;
    padding: 100px 40px 60px;
  }

  .login-left-title {
    font-size: 36px;
  }

  .login-right {
    padding: 60px 40px;
    min-height: auto;
  }

  .courses-hero {
    padding: 120px 40px 60px;
  }

  .courses-hero-title {
    font-size: 42px;
  }

  .courses-content {
    padding: 48px 40px;
    grid-template-columns: 1fr;
  }

  .lesson-hero {
    padding: 100px 40px 40px;
  }

  .lesson-hero-title {
    font-size: 28px;
  }

  .lesson-content {
    padding: 40px;
    grid-template-columns: 1fr;
  }

  .header {
    padding: 16px 24px;
  }

  .stats-bar {
    padding: 24px 40px;
  }

  .stats-inner {
    gap: 32px;
    flex-wrap: wrap;
  }
}