/* ============================================
   Route-specific screens — auth, dashboard,
   profile, lesson player, welcome.
   ============================================ */

/* ── Auth screen ── */
.auth-screen {
  position: relative;
  min-height: calc(100dvh - var(--header-height) - var(--safe-top));
  display: grid;
  place-items: center;
  padding: var(--space-6);
  overflow: hidden;
  background: var(--gradient-hero);
  isolation: isolate;
}

.auth-screen::before,
.auth-screen::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.55;
  z-index: -1;
  pointer-events: none;
}

.auth-screen::before {
  width: 420px;
  height: 420px;
  top: -120px;
  left: -80px;
  background: radial-gradient(circle, oklch(55% 0.26 300 / 0.45), transparent 70%);
}

.auth-screen::after {
  width: 360px;
  height: 360px;
  bottom: -120px;
  right: -60px;
  background: radial-gradient(circle, oklch(70% 0.14 180 / 0.4), transparent 70%);
}

.auth-card {
  width: 100%;
  max-width: 440px;
  padding: clamp(var(--space-6), 4vw, var(--space-10));
  border-radius: var(--radius-xl);
  background: color-mix(in oklch, var(--color-surface-raised) 92%, transparent);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid color-mix(in oklch, var(--color-border) 60%, transparent);
  box-shadow: var(--shadow-lg);
}

.auth-card__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.auth-card__brand-icon {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: var(--gradient-brand);
  color: #ffffff;
  font-size: 2.2rem;
  font-weight: var(--weight-black);
  letter-spacing: -0.05em;
  display: grid;
  place-items: center;
  overflow: hidden;
  box-shadow: var(--shadow-brand),
              inset 0 1px 0 oklch(100% 0 0 / 0.5),
              inset 0 -12px 22px oklch(0% 0 0 / 0.15);
}

/* Glass sheen on the plate */
.auth-card__brand-icon::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  right: 2px;
  height: 45%;
  border-radius: 18px 18px 40% 40%;
  background: linear-gradient(180deg,
    oklch(100% 0 0 / 0.32) 0%,
    oklch(100% 0 0 / 0) 100%);
  pointer-events: none;
}

.auth-card__brand-icon > span {
  position: relative;
  z-index: 1;
  background: linear-gradient(180deg, #ffffff, #d1fae5);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}


.auth-card__title {
  margin: 0;
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  text-align: center;
  line-height: var(--leading-tight);
}

.auth-card__subtitle {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-align: center;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-1);
  padding: var(--space-1);
  background: var(--color-surface-sunken);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
}

.auth-tabs__btn {
  min-height: 40px;
  border: none;
  background: transparent;
  border-radius: calc(var(--radius-md) - var(--space-1));
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
}

.auth-tabs__btn[aria-selected="true"] {
  background: var(--color-surface-raised);
  color: var(--color-primary-dark);
  font-weight: var(--weight-bold);
  box-shadow: var(--shadow-sm);
}

.auth-card__footer {
  margin-top: var(--space-5);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

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

/* ── Dashboard ── */
.dashboard {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.dashboard__hero {
  position: relative;
  padding: clamp(var(--space-6), 4vw, var(--space-10)) clamp(var(--space-5), 3vw, var(--space-8));
  border-radius: var(--radius-xl);
  background: var(--gradient-hero),
              color-mix(in oklch, var(--color-primary) 4%, var(--color-surface-raised));
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  isolation: isolate;
}

.dashboard__hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -10%;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, oklch(55% 0.26 300 / 0.2), transparent 70%);
  filter: blur(40px);
  z-index: -1;
  pointer-events: none;
}

.dashboard__hero-kicker {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  color: var(--color-primary-dark);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.25rem 0.7rem;
  background: color-mix(in oklch, var(--color-primary) 10%, var(--color-surface-raised));
  border-radius: var(--radius-full);
}

.dashboard__hero-title {
  margin: var(--space-3) 0 var(--space-3);
  font-size: var(--text-3xl);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: var(--weight-black);
}

.dashboard__hero-title-accent {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.dashboard__hero-sub {
  margin: 0 0 var(--space-5);
  color: var(--color-text-soft);
  font-size: var(--text-base);
  max-width: 60ch;
  line-height: var(--leading-normal);
}

.dashboard__section {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.dashboard__section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
}

.dashboard__section-title {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
}

.dashboard__section-link {
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
}

/* Course cards (28-week ready) */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

@media (max-width: 520px) {
  .course-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

.course-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface-raised);
  text-align: left;
  cursor: pointer;
  transition: transform var(--duration-normal) var(--ease-out-quart),
              box-shadow var(--duration-normal) var(--ease-out-quart),
              border-color var(--duration-fast) ease;
  min-height: 200px;
  overflow: hidden;
  isolation: isolate;
}

.course-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out-expo);
  z-index: 1;
}

.course-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-brand);
}

.course-card:hover::before {
  transform: scaleX(1);
}

.course-card__kicker {
  font-size: var(--text-xs);
  font-weight: var(--weight-black);
  color: var(--color-primary-dark);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.course-card__title {
  margin: var(--space-2) 0 var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
}

.course-card__desc {
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  flex: 1;
}

.course-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.course-card__progress-track {
  height: 6px;
  background: var(--color-surface-sunken);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.course-card__progress-fill {
  height: 100%;
  background: var(--gradient-brand);
  transition: width var(--duration-slow) var(--ease-out-quart);
}

.course-card__badge {
  font-size: var(--text-xs);
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  background: var(--color-surface-sunken);
  color: var(--color-text-muted);
}

.course-card__badge--active {
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  font-weight: var(--weight-bold);
}

/* ── Profile screen ── */
.profile {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.profile__header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.profile__avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: var(--color-text-inverse);
  display: grid;
  place-items: center;
  font-size: var(--text-2xl);
  font-weight: var(--weight-black);
  flex-shrink: 0;
  box-shadow: var(--shadow-brand);
}

.profile__name {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
}

.profile__email {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ── パスワード変更カード ── */
.pw-card {
  border: 1px solid var(--color-border);
  background: var(--color-surface-raised, var(--color-surface));
}

.pw-card__hint {
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* ── パスワード再設定 説明パネル（auth screen） ── */
.auth-reset-info {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface-sunken, rgba(0, 0, 0, 0.04));
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.auth-reset-info__title {
  margin: 0 0 var(--space-2);
  font-weight: var(--weight-bold);
  font-size: var(--text-sm);
}

.auth-reset-info__steps {
  margin: 0;
  padding-left: 1.4em;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.auth-reset-info__hint {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* ── Lesson welcome screen ── */
.welcome {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-10) var(--space-5);
}

.welcome__title {
  margin: 0 0 var(--space-4);
  font-size: var(--text-hero);
  line-height: 1.05;
  font-weight: var(--weight-black);
  letter-spacing: -0.03em;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.welcome__sub {
  margin: 0 0 var(--space-8);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

/* ── Lesson content ── */
.lesson-content {
  max-width: 720px;
  margin: 0 auto;
  padding-bottom: var(--space-12);
}

.lesson-content[hidden] {
  display: none;
}

.lesson-content h1,
.lesson-content h2,
.lesson-content h3 {
  line-height: var(--leading-tight);
  font-weight: var(--weight-bold);
  letter-spacing: -0.01em;
}

.lesson-content h1 {
  font-size: var(--text-3xl);
  margin: 0 0 var(--space-3);
}

.lesson-content h2 {
  font-size: var(--text-2xl);
  margin: var(--space-10) 0 var(--space-3);
}

.lesson-content h3 {
  font-size: var(--text-xl);
  margin: var(--space-6) 0 var(--space-2);
}

.lesson-content p {
  margin: var(--space-4) 0;
}

.lesson-content ul,
.lesson-content ol {
  padding-left: 1.4em;
  margin: var(--space-4) 0;
}

.lesson-content li {
  margin: var(--space-2) 0;
}

.lesson-content code {
  font-family: var(--font-mono);
  background: var(--color-surface-sunken);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.92em;
}

.lesson-content blockquote {
  margin: var(--space-5) 0;
  padding: var(--space-4) var(--space-5);
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: var(--radius-md);
}

.lesson-content img,
.lesson-content figure {
  margin: var(--space-5) auto;
  border-radius: var(--radius-lg);
}

/* Lesson nav footer */
.lesson-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.lesson-nav .btn {
  flex: 1;
  max-width: 200px;
}

.lesson-nav .btn--primary {
  margin-left: auto;
}

/* Kicker */
.lesson-kicker {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

/* Lesson meta row */
.lesson-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}

.lesson-meta__item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

/* Celebration banner at course end */
.course-complete {
  margin: var(--space-10) 0 var(--space-6);
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg,
    var(--color-success-bg),
    var(--color-surface-raised));
  border: 1px solid var(--color-success-border);
  text-align: center;
}

.course-complete__title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
}

.course-complete__body {
  margin: 0 0 var(--space-5);
  color: var(--color-text-muted);
}