/* =========================================================================
   LinguaFly — Design System
   ========================================================================= */

:root {
  --lf-green: #58cc02;
  --lf-green-dark: #46a302;
  --lf-blue: #1cb0f6;
  --lf-blue-dark: #1291cc;
  --lf-orange: #ff9600;
  --lf-orange-dark: #e08500;
  --lf-red: #ff4b4b;
  --lf-purple: #7b61ff;
  --lf-bg: #f6f7fb;
  --lf-surface: #ffffff;
  --lf-text: #2e3440;
  --lf-text-soft: #7c8595;
  --lf-white: #ffffff;
  --lf-border: #e5e7ef;
  --lf-radius: 16px;
  --lf-radius-sm: 12px;
  --lf-shadow: 0 2px 10px rgba(23, 43, 99, 0.06);
  --lf-shadow-lg: 0 12px 34px rgba(23, 43, 99, 0.14);
  --lf-shadow-green: 0 6px 18px rgba(88, 204, 2, 0.28);
  --lf-grad-green: linear-gradient(135deg, #58cc02 0%, #7cde2e 100%);
  --lf-grad-blue: linear-gradient(135deg, #1cb0f6 0%, #4cc7ff 100%);
  --lf-grad-orange: linear-gradient(135deg, #ff9600 0%, #ffc24d 100%);
  --lf-grad-red: linear-gradient(135deg, #ff4b4b 0%, #ff8080 100%);
  --lf-grad-purple: linear-gradient(135deg, #7b61ff 0%, #a78bfa 100%);
}

/* ------------------------------------------------------------------------
   Layout fallback — centralização mesmo se o Bootstrap não carregar.
   ------------------------------------------------------------------------ */
.container,
.container-fluid {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: 15px;
  padding-left: 15px;
}

@media (min-width: 576px) { .container { max-width: 540px; } }
@media (min-width: 768px) { .container { max-width: 720px; } }
@media (min-width: 992px) { .container { max-width: 960px; } }
@media (min-width: 1200px) { .container { max-width: 1140px; } }
@media (min-width: 1400px) { .container { max-width: 1320px; } }

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Nunito", "Segoe UI", sans-serif;
  background: var(--lf-bg);
  color: var(--lf-text);
  min-height: 100vh;
  margin: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cdd2de; border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: #aab2c3; }

h1, h2, h3, h4, h5 { font-weight: 800; line-height: 1.25; }
p { line-height: 1.6; }

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

::selection { background: rgba(88, 204, 2, 0.25); }

:focus-visible { outline: 3px solid rgba(28, 176, 246, 0.55); outline-offset: 2px; border-radius: 6px; }

/* ------------------------------------------------------------------------
   Buttons
   ------------------------------------------------------------------------ */
.btn { border-radius: var(--lf-radius); font-weight: 800; transition: transform .08s ease, box-shadow .15s ease, filter .15s ease; }
.btn:active { transform: translateY(2px); }

.btn-lf,
.btn-lf-green {
  background: var(--lf-green);
  border: none;
  border-bottom: 4px solid var(--lf-green-dark);
  color: #fff;
  padding: 0.6rem 1.7rem;
  font-size: 1.02rem;
  box-shadow: 0 4px 10px rgba(88, 204, 2, 0.25);
}
.btn-lf:hover, .btn-lf-green:hover { background: var(--lf-green-dark); color: #fff; transform: translateY(-1px); }
.btn-lf:active, .btn-lf-green:active { transform: translateY(2px); border-bottom-width: 2px; }

.btn-lf-blue {
  background: var(--lf-blue);
  border: none;
  border-bottom: 4px solid var(--lf-blue-dark);
  color: #fff;
  box-shadow: 0 4px 10px rgba(28, 176, 246, 0.25);
}
.btn-lf-blue:hover { background: var(--lf-blue-dark); color: #fff; transform: translateY(-1px); }
.btn-lf-blue:active { transform: translateY(2px); }

.btn-lf-orange {
  background: var(--lf-orange);
  border: none;
  border-bottom: 4px solid var(--lf-orange-dark);
  color: #fff;
  box-shadow: 0 4px 10px rgba(255, 150, 0, 0.25);
}
.btn-lf-orange:hover { background: var(--lf-orange-dark); color: #fff; transform: translateY(-1px); }
.btn-lf-orange:active { transform: translateY(2px); }

.btn-lf-purple {
  background: var(--lf-purple);
  border: none;
  border-bottom: 4px solid #5f48e6;
  color: #fff;
  box-shadow: 0 4px 10px rgba(123, 97, 255, 0.28);
}
.btn-lf-purple:hover { background: #5f48e6; color: #fff; transform: translateY(-1px); }
.btn-lf-purple:active { transform: translateY(2px); }

.btn-lf-outline {
  background: #fff;
  border: 2px solid var(--lf-border);
  color: var(--lf-text);
}
.btn-lf-outline:hover { border-color: var(--lf-green); color: var(--lf-green); background: #fbfff5; }
.btn-lf-outline:active { transform: translateY(1px); }

.btn-xl { padding: 0.9rem 2.6rem; font-size: 1.15rem; border-radius: 18px; }

.badge-lf { background: var(--lf-green); color: #fff; border-radius: 10px; padding: 0.28rem 0.75rem; font-weight: 800; }
.pro-badge { background: linear-gradient(135deg, #a16207, #f59e0b); color: #fff; font-size: 0.7rem; border-radius: 8px; padding: 0.15rem 0.5rem; font-weight: 800; }

/* Pills */
.pill { display: inline-flex; align-items: center; gap: .35rem; font-size: .78rem; font-weight: 800; padding: .3rem .7rem; border-radius: 999px; }
.pill-green { background: #e9fcd7; color: var(--lf-green-dark); }
.pill-blue { background: #e3f6ff; color: var(--lf-blue-dark); }
.pill-orange { background: #fff1dd; color: var(--lf-orange-dark); }
.pill-red { background: #ffe3e3; color: #e11d1d; }
.pill-purple { background: #efeaff; color: #5f48e6; }

/* ------------------------------------------------------------------------
   Navbar
   ------------------------------------------------------------------------ */
.navbar-lf {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(23, 43, 99, 0.06);
  border-bottom: 1px solid #eef0f6;
  position: sticky;
  top: 0;
  z-index: 1030;
}

.navbar-lf .navbar-brand {
  font-weight: 900;
  font-size: 1.4rem;
  color: var(--lf-text);
  letter-spacing: -0.3px;
}
.navbar-lf .brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--lf-grad-green);
  font-size: 1.25rem;
  box-shadow: 0 4px 10px rgba(88, 204, 2, 0.3);
  margin-right: .55rem;
}
.navbar-lf .brand-name { background: linear-gradient(135deg, #46a302, #1cb0f6); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

.navbar-lf .nav-link {
  font-weight: 800;
  color: var(--lf-text-soft);
  border-radius: 12px;
  padding: 0.45rem 1rem;
  transition: all .12s ease;
}
.navbar-lf .nav-link:hover { background: #f2f4f9; color: var(--lf-text); }
.navbar-lf .nav-link.active { color: var(--lf-green-dark); background: #eefadc; }

.nav-chip {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: #fff;
  border: 2px solid var(--lf-border);
  border-radius: 999px;
  padding: .32rem .9rem;
  font-weight: 900;
  font-size: .92rem;
  color: var(--lf-text);
  box-shadow: var(--lf-shadow);
}
.nav-chip .chip-dot { font-size: 1rem; line-height: 1; }

.user-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  color: #fff;
}

/* ------------------------------------------------------------------------
   Cards & surfaces
   ------------------------------------------------------------------------ */
.card { border-radius: var(--lf-radius); border: 1px solid var(--lf-border); }
.card-lf {
  background: var(--lf-surface);
  border: 2px solid var(--lf-border);
  border-radius: var(--lf-radius);
  box-shadow: var(--lf-shadow);
}
.card-lf-hover { transition: transform .15s ease, box-shadow .2s ease, border-color .2s ease; }
.card-lf-hover:hover {
  transform: translateY(-4px) scale(1.005);
  box-shadow: var(--lf-shadow-lg);
  border-color: #cfe8bd;
}

.grad-text {
  background: linear-gradient(135deg, #46a302, #1cb0f6);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-card {
  background: #fff;
  border-radius: var(--lf-radius);
  border: 2px solid var(--lf-border);
  padding: 1rem 1.2rem;
  text-align: center;
  box-shadow: var(--lf-shadow);
  transition: transform .15s ease, box-shadow .2s ease;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--lf-shadow-lg); }
.stat-card .stat-icon { font-size: 1.8rem; }
.stat-card .stat-value { font-size: 1.5rem; font-weight: 900; color: var(--lf-text); margin-top: .15rem; }
.stat-card .stat-label { font-size: .78rem; color: var(--lf-text-soft); font-weight: 700; }

/* ------------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------------ */
.hero-lf {
  background: linear-gradient(135deg, #4cb500 0%, #1cb0f6 100%);
  position: relative;
  overflow: hidden;
  color: #fff;
  padding: 4.5rem 0;
}
.hero-lf::before,
.hero-lf::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  pointer-events: none;
}
.hero-lf::before { width: 420px; height: 420px; top: -160px; right: -110px; }
.hero-lf::after { width: 300px; height: 300px; bottom: -140px; left: -80px; background: rgba(255,255,255,.05); }

.hero-lf .hero-inner { position: relative; z-index: 1; }
.hero-lf h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 900; letter-spacing: -1px; }
.hero-lf .hero-badge { font-size: .9rem; background: rgba(255,255,255,.18); backdrop-filter: blur(4px); }

.hero-emoji-float { animation: floaty 3.2s ease-in-out infinite; display: inline-block; }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

.mock-card {
  background: #fff;
  border-radius: 22px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.22);
  padding: 1.4rem;
  transform: rotate(1.5deg);
  max-width: 340px;
  color: var(--lf-text);
}
.mock-card .mock-progress { height: 10px; background: #eef; border-radius: 99px; overflow: hidden; }
.mock-card .mock-progress span { display: block; height: 100%; width: 64%; background: var(--lf-green); border-radius: 99px; }
.mock-option { display: flex; align-items: center; justify-content: space-between; gap: .6rem; background: #f7f8fb; border: 2px solid var(--lf-border); border-radius: 14px; padding: .7rem 1rem; font-weight: 800; color: var(--lf-text); }
.mock-option span:last-child { font-size: 1.3rem; }

/* ------------------------------------------------------------------------
   Lesson cards (path)
   ------------------------------------------------------------------------ */
.lesson-btn { transition: transform .12s ease, box-shadow .15s ease; }
.lesson-btn:hover { transform: translateY(-3px); }
.lesson-btn:active { transform: translateY(1px); }

.lesson-card {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 72px;
  border-radius: 14px;
  border: 2px solid var(--lf-border);
  background: #fff;
  font-weight: 800;
  font-size: 1.2rem;
  box-shadow: var(--lf-shadow);
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--lf-text);
}
.lesson-card:hover { transform: translateY(-2px); box-shadow: var(--lf-shadow-hover); }
.lesson-card.completed { background: var(--lf-grad-green); border-color: var(--lf-green-dark); color: #fff; box-shadow: var(--lf-shadow-green); }
.lesson-card.available { border-color: var(--lf-blue); color: var(--lf-blue); background: #fff; }
.lesson-card.available:hover { background: #f0faff; }
.lesson-card.locked { background: #eaeaea; border-color: #d9d9d9; color: #b0b0b0; cursor: not-allowed; filter: grayscale(0.5); }
.lesson-card.star { background: linear-gradient(135deg, #ff9600, #ffc107); border-color: #e08500; color: #fff; }

.path-unit-header { font-weight: 900; font-size: 1.1rem; margin-top: 2rem; }
.path-course-header { margin-top: 2.5rem; font-weight: 900; font-size: 1.5rem; }

.review-banner,
.practice-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--lf-grad-orange);
  color: #fff;
  border-radius: 16px;
  padding: 16px 22px;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 8px 22px rgba(255, 150, 0, 0.3);
  transition: transform .15s ease, box-shadow .2s ease;
}
.review-banner:hover, .practice-banner:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 12px 28px rgba(255,150,0,.38); }
.practice-banner { background: var(--lf-grad-blue); box-shadow: 0 8px 22px rgba(28, 176, 246, 0.3); }
.practice-banner:hover { box-shadow: 0 12px 28px rgba(28, 176, 246, 0.4); }

/* ------------------------------------------------------------------------
   Exercise area
   ------------------------------------------------------------------------ */
.exercise-shell { max-width: 700px; margin: 0 auto; padding: 2rem 1rem; }
.exercise-prompt { font-size: clamp(1.35rem, 3vw, 1.75rem); font-weight: 900; text-align: center; margin: 1.6rem 0; color: var(--lf-text); }

.exercise-visual {
  text-align: center;
  font-size: 4.5rem;
  line-height: 1.1;
  animation: pop .35s ease;
}
@keyframes pop { 0% { transform: scale(.6); opacity: 0; } 70% { transform: scale(1.08); } 100% { transform: scale(1); opacity: 1; } }

.option-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 520px) { .option-grid { grid-template-columns: 1fr; } }

.option-btn {
  background: #fff;
  border: 2px solid var(--lf-border);
  border-radius: var(--lf-radius);
  padding: 1.2rem;
  font-size: 1.1rem;
  font-weight: 700;
  text-align: center;
  cursor: pointer;
  transition: all 0.12s ease;
  color: var(--lf-text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}
.option-btn:hover { border-color: var(--lf-blue); background: #f0faff; transform: translateY(-2px); }
.option-btn:active { transform: translateY(0); }
.option-btn.selected { border-color: var(--lf-blue); background: #d4eeff; color: var(--lf-blue-dark); box-shadow: inset 0 0 0 2px var(--lf-blue); }
.option-btn.correct { border-color: var(--lf-green); background: #e6ffd6; color: var(--lf-green-dark); animation: pop .3s ease; }
.option-btn.wrong { border-color: var(--lf-red); background: #ffe0e0; color: var(--lf-red); animation: shake .3s ease; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

.answer-input,
.type-input {
  width: 100%;
  padding: 1rem 1.2rem;
  font-size: 1.2rem;
  font-weight: 700;
  border-radius: var(--lf-radius);
  border: 2px solid var(--lf-border);
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
  background: #fff;
  color: var(--lf-text);
}
.answer-input:focus, .type-input:focus { border-color: var(--lf-blue); box-shadow: 0 0 0 4px rgba(28, 176, 246, 0.15); }

.hint-btn {
  display: block;
  margin: 0 auto;
  background: #fffdf6;
  border: 2px dashed var(--lf-orange);
  color: var(--lf-orange-dark);
  border-radius: 12px;
  padding: .5rem 1.2rem;
  font-weight: 800;
  cursor: pointer;
  transition: all .15s ease;
}
.hint-btn:hover { background: var(--lf-grad-orange); color: #fff; border-style: solid; }
.hint-text {
  max-width: 520px;
  margin: .8rem auto 0;
  background: #fff8e8;
  border: 1px solid #ffe1a8;
  color: #8a5b00;
  border-radius: 12px;
  padding: .8rem 1.1rem;
  font-weight: 700;
  font-size: .95rem;
  animation: pop .25s ease;
}

.result-panel { border-radius: var(--lf-radius); padding: 1.8rem; margin-top: 2rem; text-align: center; animation: pop .3s ease; }
.result-panel.correct { background: #dfffd0; border: 2px solid var(--lf-green); box-shadow: inset 0 0 0 1px rgba(88, 204, 2, .25); }
.result-panel.wrong { background: #ffe0e0; border: 2px solid var(--lf-red); }

/* ------------------------------------------------------------------------
   Story player
   ------------------------------------------------------------------------ */
.story-shell { max-width: 760px; margin: 0 auto; padding: 1rem 1rem 3rem; }
.story-bubble {
  background: #fff;
  border: 2px solid var(--lf-border);
  border-radius: 20px;
  padding: 1.4rem 1.6rem;
  box-shadow: var(--lf-shadow);
  animation: pop .3s ease;
}
.story-speaker { display: flex; align-items: center; gap: .5rem; font-weight: 900; color: var(--lf-text-soft); font-size: .9rem; margin-bottom: .6rem; }
.story-speaker .speaker-emoji { font-size: 1.3rem; }
.story-text { font-size: 1.5rem; font-weight: 900; color: var(--lf-text); line-height: 1.4; }
.story-translation { color: var(--lf-text-soft); font-weight: 700; margin-top: .5rem; font-size: 1.05rem; }
.story-question { margin-top: 1.2rem; padding-top: 1.2rem; border-top: 2px dashed var(--lf-border); }
.story-question .question-label { font-size: .85rem; font-weight: 800; color: var(--lf-orange-dark); text-transform: uppercase; letter-spacing: .05em; }
.story-question .question-text { font-size: 1.15rem; font-weight: 900; margin-top: .2rem; }

.story-cover { text-align: center; padding-top: 1rem; animation: pop .4s ease; }
.story-cover .cover-emoji { font-size: 6rem; animation: floaty 3s ease-in-out infinite; display: inline-block; }
.story-cover .cover-title { font-size: 2.2rem; font-weight: 900; margin-top: .5rem; }
.story-cover .cover-sub { color: var(--lf-text-soft); font-weight: 700; max-width: 480px; margin: .4rem auto 0; }

#story-btn-secondary { border-radius: 12px; font-weight: 800; }

/* ------------------------------------------------------------------------
   SRS / review
   ------------------------------------------------------------------------ */
.srs-card {
  max-width: 520px;
  margin: 0 auto;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #fff;
  border: 2px solid var(--lf-border);
  border-radius: 22px;
  box-shadow: var(--lf-shadow-lg);
  padding: 2rem;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease;
}
.srs-card:hover { transform: translateY(-3px) rotate(-.5deg); box-shadow: 0 18px 40px rgba(23, 43, 99, .16); }
.srs-front { font-size: 2rem; font-weight: 900; }
.srs-back { font-size: 1.8rem; font-weight: 900; color: var(--lf-green-dark); }
.rating-btn { border-radius: var(--lf-radius); font-weight: 800; padding: 0.6rem 1.4rem; font-size: 0.95rem; transition: transform .08s ease; }
.rating-btn:active { transform: translateY(2px); }
.rating-0 { background: var(--lf-red); color: #fff; border: none; }
.rating-1 { background: var(--lf-orange); color: #fff; border: none; }
.rating-2 { background: var(--lf-green); color: #fff; border: none; }
.rating-3 { background: var(--lf-blue); color: #fff; border: none; }

/* ------------------------------------------------------------------------
   Shop
   ------------------------------------------------------------------------ */
.shop-item { border-radius: var(--lf-radius); background: #fff; border: 2px solid var(--lf-border); padding: 1.6rem; text-align: center; box-shadow: var(--lf-shadow); height: 100%; transition: transform .15s ease, box-shadow .2s ease, border-color .2s ease; }
.shop-item:hover { transform: translateY(-4px); box-shadow: var(--lf-shadow-lg); border-color: #ffd591; }
.shop-item .item-icon { font-size: 3.4rem; }

/* ------------------------------------------------------------------------
   League
   ------------------------------------------------------------------------ */
.league-row { display: flex; align-items: center; gap: 1rem; background: #fff; border-radius: 14px; border: 2px solid var(--lf-border); padding: 0.9rem 1.2rem; margin-bottom: 0.6rem; transition: transform .12s ease, box-shadow .15s ease; }
.league-row:hover { transform: translateY(-2px); box-shadow: var(--lf-shadow); }
.league-row.me { border-color: var(--lf-green); background: #f2ffe4; box-shadow: 0 0 0 3px rgba(88, 204, 2, 0.15); }
.league-rank { font-weight: 900; font-size: 1.2rem; width: 44px; text-align: center; }

/* ------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------ */
.footer-lf { background: #fff; border-top: 2px solid var(--lf-border); padding: 2.5rem 0; margin-top: 4rem; }
.footer-lf .footer-title { font-weight: 900; color: var(--lf-text); }
.footer-lf a { color: var(--lf-text-soft); }
.footer-lf a:hover { color: var(--lf-green); }

/* ------------------------------------------------------------------------
   Flash
   ------------------------------------------------------------------------ */
.flash-bar { color: #fff; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12); animation: slideDown .3s ease; }
.flash-bar .btn-close { filter: invert(1); }
.alert-success { background: var(--lf-grad-green); border: none; }
.alert-danger { background: var(--lf-grad-red); border: none; }
.alert-warning { background: var(--lf-grad-orange); border: none; }
.alert-info { background: var(--lf-grad-blue); border: none; }
.flash-strip { border-radius: 0; border: none; border-bottom: 4px solid; font-weight: 800; margin-bottom: 0; animation: slideDown 0.3s ease; }

@keyframes slideDown {
  from { transform: translateY(-100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ------------------------------------------------------------------------
   Admin
   ------------------------------------------------------------------------ */
.admin-side { border-right: 1px solid rgba(255,255,255,.06); }
.admin-sidebar { background: #2d3a45; min-height: 100vh; color: #fff; padding: 1.5rem 1rem; }
.admin-sidebar .nav-link { color: #cfd8e0; border-radius: 10px; font-weight: 700; padding: 0.6rem 1rem; }
.admin-sidebar .nav-link:hover { background: #3a4a57; color: #fff; }
.admin-sidebar .nav-link.active { background: var(--lf-green); color: #fff; }

.kpi-card { background: #fff; border-radius: var(--lf-radius); border: 2px solid var(--lf-border); padding: 1.2rem; box-shadow: var(--lf-shadow); transition: transform .15s ease, box-shadow .2s ease; }
.kpi-card:hover { transform: translateY(-3px); box-shadow: var(--lf-shadow-lg); }
.kpi-card .kpi-value { font-size: 1.8rem; font-weight: 900; }
.kpi-card .kpi-label { color: var(--lf-text-soft); font-weight: 700; font-size: 0.85rem; }

/* ------------------------------------------------------------------------
   Premium
   ------------------------------------------------------------------------ */
.premium-hero { background: linear-gradient(135deg, #6d28d9 0%, #2563eb 100%); color: #fff; padding: 4rem 0; border-radius: 0 0 30px 30px; }
.price-card { border: 3px solid #f59e0b; border-radius: 20px; background: #fff; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1); }
.check-feature { color: var(--lf-green); }

/* ------------------------------------------------------------------------
   Achievements
   ------------------------------------------------------------------------ */
.ach-card { border-radius: var(--lf-radius); padding: 1.4rem; text-align: center; background: #fff; border: 2px solid var(--lf-border); transition: transform .15s ease, box-shadow .2s ease; }
.ach-card:hover { transform: translateY(-3px); box-shadow: var(--lf-shadow-lg); }
.ach-card.unlocked { background: linear-gradient(135deg, #fffbeb, #fef3c7); border-color: #fbbf24; }
.ach-card.locked { filter: grayscale(0.9); opacity: 0.6; }
.ach-card .ach-icon { font-size: 2.6rem; }

/* ------------------------------------------------------------------------
   Practice center
   ------------------------------------------------------------------------ */
.practice-card {
  display: block;
  background: #fff;
  border: 2px solid var(--lf-border);
  border-radius: 20px;
  padding: 1.8rem 1.6rem;
  text-align: center;
  height: 100%;
  color: var(--lf-text);
  box-shadow: var(--lf-shadow);
  transition: transform .16s ease, box-shadow .22s ease, border-color .22s ease;
}
.practice-card:hover { transform: translateY(-5px); box-shadow: var(--lf-shadow-lg); border-color: #bfe7ff; color: var(--lf-text); }
.practice-card .pc-icon { font-size: 3rem; }
.practice-card .pc-title { font-weight: 900; font-size: 1.15rem; margin-top: .6rem; }
.practice-card .pc-desc { color: var(--lf-text-soft); font-weight: 700; font-size: .92rem; margin: .2rem 0 0; }
.practice-card.pc-red:hover { border-color: #ffb0b0; }
.practice-card.pc-orange:hover { border-color: #ffd591; }
.practice-card.pc-purple:hover { border-color: #cdbfff; }

/* Progress tracks */
.progress-track { height: 14px; background: #e9ebf1; border-radius: 99px; overflow: hidden; border: 2px solid #e9ebf1; }
#progress-bar, .xp-fill, .course-fill { transition: width .35s ease; background: var(--lf-green); }

/* Fade-in on load for hero sections */
.fade-up { animation: fadeUp .5s ease both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }
.delay-1 { animation-delay: .08s; }
.delay-2 { animation-delay: .16s; }
.delay-3 { animation-delay: .24s; }

/* ------------------------------------------------------------------------
   Error pages
   ------------------------------------------------------------------------ */
.error-hero { min-height: 60vh; display: flex; align-items: center; }
.error-code {
  font-size: clamp(4.5rem, 16vw, 9rem);
  font-weight: 900;
  line-height: 1;
  background: var(--lf-grad-green);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ------------------------------------------------------------------------
   Feedback / loading states
   ------------------------------------------------------------------------ */
.btn.is-loading { position: relative; color: transparent !important; pointer-events: none; }
.btn.is-loading::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 1.1rem;
  height: 1.1rem;
  border: 3px solid rgba(255, 255, 255, .45);
  border-top-color: #fff;
  border-radius: 50%;
  animation: lfSpin .6s linear infinite;
}
.btn-lf-outline.is-loading::after,
.btn-outline-secondary.is-loading::after { border-color: rgba(88, 204, 2, .35); border-top-color: var(--lf-green); }
@keyframes lfSpin { to { transform: rotate(360deg); } }

.result-panel[aria-live]:empty { display: none; }

@media (prefers-reduced-motion: reduce) {
  .fade-up, .option-btn, .flash-bar { animation: none !important; transition: none !important; }
}