/* ===================================
   MATH MYSTERY LAB - Main Stylesheet
   =================================== */

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&family=Fredoka+One&display=swap');

/* --- CSS Variables --- */
:root {
  --primary:      #6C3FC5;
  --secondary:    #FF6B35;
  --accent-blue:  #3AB0FF;
  --accent-green: #4CAF50;
  --accent-pink:  #FF4F9A;
  --yellow:       #FFD700;
  --bg:           #F9F5FF;
  --white:        #FFFFFF;
  --text-dark:    #1A1A2E;
  --text-mid:     #444466;
  --radius:       16px;
  --shadow:       0 4px 20px rgba(108,63,197,0.12);
  --font-head:    'Fredoka One', cursive;
  --font-body:    'Nunito', sans-serif;
  --lvl-beginner:     #4CAF50;
  --lvl-elementary:   #3AB0FF;
  --lvl-intermediate: #FF6B35;
  --lvl-advanced:     #9B59B6;
  --lvl-university:   #1A1A2E;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-body); background: var(--bg); color: var(--text-dark); line-height: 1.6; }
img  { max-width: 100%; display: block; }
a    { text-decoration: none; color: inherit; }
ul   { list-style: none; }

/* ===== NAVBAR ===== */
.navbar { background: var(--white); box-shadow: 0 2px 12px rgba(108,63,197,.10); position: sticky; top: 0; z-index: 100; padding: 0 24px; }
.navbar-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 70px; gap: 12px; }
.logo { font-family: var(--font-head); font-size: 1.5rem; color: var(--primary); display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.logo span { color: var(--secondary); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { font-weight: 700; font-size: .88rem; padding: 8px 12px; border-radius: 30px; color: var(--text-mid); transition: background .2s, color .2s; }
.nav-links a:hover, .nav-links a.active { background: var(--primary); color: var(--white); }
.nav-links .btn-nav-cta { background: var(--secondary); color: var(--white); }
.nav-links .btn-nav-cta:hover { background: var(--primary); }

/* Dropdown */
.dropdown { position: relative; }
.dropdown-menu { display: none; position: absolute; top: calc(100% + 8px); left: 0; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); min-width: 190px; padding: 8px 0; z-index: 200; }
.dropdown-menu a { display: block; padding: 10px 20px; border-radius: 0; font-size: .86rem; }
.dropdown-menu a:hover { background: var(--bg); color: var(--primary); }
.dropdown:hover .dropdown-menu { display: block; }

/* Auth */
.nav-auth { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.user-avatar { width: 34px; height: 34px; border-radius: 50%; border: 2px solid var(--primary); object-fit: cover; }
.user-name { font-weight: 800; font-size: .82rem; color: var(--primary); max-width: 90px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#loginBtn  { background: var(--primary); color: #fff; border: none; padding: 8px 16px; border-radius: 30px; font-family: var(--font-body); font-weight: 800; font-size: .85rem; cursor: pointer; transition: background .2s; white-space: nowrap; }
#loginBtn:hover  { background: #5530a0; }
#logoutBtn { background: none; border: 2px solid var(--primary); color: var(--primary); padding: 6px 12px; border-radius: 30px; font-family: var(--font-body); font-weight: 700; font-size: .8rem; cursor: pointer; transition: .2s; white-space: nowrap; }
#logoutBtn:hover { background: var(--primary); color: #fff; }

/* Hamburger */
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.hamburger span { display: block; width: 26px; height: 3px; background: var(--primary); border-radius: 3px; }

/* ===== HERO ===== */
.hero { background: linear-gradient(135deg, var(--primary) 0%, #9B59B6 50%, var(--accent-blue) 100%); color: #fff; text-align: center; padding: 80px 24px 70px; position: relative; overflow: hidden; }
.hero::before { content:''; position:absolute; top:-40px; right:-40px; width:250px; height:250px; background:rgba(255,255,255,.08); border-radius:50%; }
.hero::after  { content:''; position:absolute; bottom:-60px; left:-30px; width:200px; height:200px; background:rgba(255,255,255,.06); border-radius:50%; }
.hero h1 { font-family: var(--font-head); font-size: clamp(2.2rem,5vw,3.5rem); margin-bottom: 16px; text-shadow: 0 2px 8px rgba(0,0,0,.2); }
.hero p  { font-size: clamp(1rem,2.5vw,1.2rem); max-width: 620px; margin: 0 auto 32px; opacity: .93; font-weight: 600; }
.hero-emoji { font-size: 2.5rem; margin-bottom: 12px; }
.hero-btns  { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ===== BUTTONS ===== */
.btn { display: inline-block; padding: 13px 28px; border-radius: 50px; font-family: var(--font-body); font-weight: 800; font-size: .95rem; cursor: pointer; border: none; transition: transform .18s, box-shadow .18s; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.btn-white  { background: var(--white); color: var(--primary); }
.btn-orange { background: var(--secondary); color: var(--white); }
.btn-purple { background: var(--primary); color: var(--white); }
.btn-full   { width: 100%; text-align: center; }
.btn-sm     { padding: 8px 18px; font-size: .82rem; }

/* ===== SECTION ===== */
.section       { padding: 60px 24px; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-alt   { background: var(--white); }
.section-title { font-family: var(--font-head); font-size: clamp(1.6rem,3.5vw,2.4rem); color: var(--primary); text-align: center; margin-bottom: 40px; }
.section-title span { color: var(--secondary); }

/* ===== BADGES ===== */
.badge { display:inline-block; background:var(--yellow); color:var(--text-dark); font-size:.72rem; font-weight:800; padding:3px 10px; border-radius:50px; margin-top:6px; }
.level-badge { display:inline-block; padding:3px 12px; border-radius:20px; font-size:.75rem; font-weight:800; color:#fff; }
.level-beginner     { background: var(--lvl-beginner); }
.level-elementary   { background: var(--lvl-elementary); }
.level-intermediate { background: var(--lvl-intermediate); }
.level-advanced     { background: var(--lvl-advanced); }
.level-university   { background: var(--lvl-university); }

/* ===== TOPIC CARDS ===== */
.topics-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px,1fr)); gap: 20px; }
.topic-card  { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; text-align: center; transition: transform .22s, box-shadow .22s; cursor: pointer; }
.topic-card:hover { transform: translateY(-6px); box-shadow: 0 12px 32px rgba(108,63,197,.18); }
.topic-card-img  { width:100%; aspect-ratio:1/1; object-fit:cover; }
.topic-card-body { padding: 14px 12px 18px; }
.topic-card-body h3 { font-family: var(--font-head); font-size: 1.25rem; color: var(--primary); margin-bottom: 4px; }
.topic-card-body p  { font-size: .84rem; color: var(--text-mid); margin-bottom: 8px; }
.card-arithmetic { border-top: 5px solid var(--secondary); }
.card-geometry   { border-top: 5px solid var(--accent-blue); }
.card-algebra    { border-top: 5px solid var(--accent-pink); }
.card-statistics { border-top: 5px solid var(--accent-green); }
.card-calculus   { border-top: 5px solid var(--yellow); }
.card-trig       { border-top: 5px solid #9B59B6; }
.card-number     { border-top: 5px solid #E91E63; }

/* ===== PAGE HEADER ===== */
.page-header    { color:#fff; text-align:center; padding:60px 24px 50px; }
.page-header h1 { font-family:var(--font-head); font-size:clamp(2rem,4vw,3rem); margin-bottom:12px; }
.page-header p  { font-size:1.05rem; opacity:.9; font-weight:600; max-width:560px; margin:0 auto; }

/* ===== LEVEL TABS ===== */
.level-tabs { display:flex; gap:10px; flex-wrap:wrap; justify-content:center; margin-bottom:36px; }
.level-tab  { padding:10px 22px; border-radius:30px; font-weight:800; font-size:.86rem; cursor:pointer; border:2px solid transparent; transition:.2s; background:var(--white); color:var(--text-mid); box-shadow:var(--shadow); }
.level-tab:hover { transform:translateY(-2px); }
.level-tab.active { color:#fff; }
.level-tab.active.tab-beginner     { background:var(--lvl-beginner); }
.level-tab.active.tab-elementary   { background:var(--lvl-elementary); }
.level-tab.active.tab-intermediate { background:var(--lvl-intermediate); }
.level-tab.active.tab-advanced     { background:var(--lvl-advanced); }
.level-tab.active.tab-university   { background:var(--lvl-university); }
.level-panel        { display:none; }
.level-panel.active { display:block; }

/* ===== LESSON / VIDEO CARDS ===== */
.lessons-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:22px; }
.lesson-card  { background:var(--white); border-radius:var(--radius); box-shadow:var(--shadow); overflow:hidden; transition:transform .2s; }
.lesson-card:hover { transform:translateY(-4px); }
.lesson-video  { width:100%; aspect-ratio:16/9; display:flex; align-items:center; justify-content:center; font-size:2.8rem; }
.lesson-body   { padding:18px; }
.lesson-body h3 { font-family:var(--font-head); font-size:1.15rem; color:var(--primary); margin-bottom:6px; }
.lesson-body p  { font-size:.86rem; color:var(--text-mid); margin-bottom:12px; }
.lesson-actions { display:flex; gap:8px; flex-wrap:wrap; }

/* ===== GAME CARDS ===== */
.games-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:22px; }
.game-card  { background:var(--white); border-radius:var(--radius); box-shadow:var(--shadow); padding:24px; text-align:center; transition:transform .2s; cursor:pointer; position:relative; overflow:hidden; }
.game-card:hover { transform:translateY(-5px); }
.game-card::before { content:''; position:absolute; top:0;left:0;right:0; height:5px; }
.game-card.game-quiz::before    { background:var(--primary); }
.game-card.game-fillin::before  { background:var(--secondary); }
.game-card.game-drag::before    { background:var(--accent-blue); }
.game-card.game-timed::before   { background:var(--accent-green); }
.game-card.game-custom::before  { background:var(--accent-pink); }
.game-icon { font-size:3rem; margin-bottom:12px; }
.game-card h3 { font-family:var(--font-head); font-size:1.25rem; color:var(--primary); margin-bottom:6px; }
.game-card p  { font-size:.86rem; color:var(--text-mid); margin-bottom:14px; }

/* ===== MODAL ===== */
.modal-overlay { display:none; position:fixed; inset:0; background:rgba(0,0,0,.55); z-index:500; align-items:center; justify-content:center; padding:20px; }
.modal-overlay.open { display:flex; }
.modal-box  { background:var(--white); border-radius:var(--radius); max-width:600px; width:100%; max-height:90vh; overflow-y:auto; padding:32px; position:relative; animation:popIn .25s ease; }
@keyframes popIn { from{transform:scale(.92);opacity:0} to{transform:scale(1);opacity:1} }
.modal-close    { position:absolute; top:16px;right:16px; background:none; border:none; font-size:1.5rem; cursor:pointer; color:var(--text-mid); }
.modal-title    { font-family:var(--font-head); font-size:1.8rem; color:var(--primary); margin-bottom:6px; }
.modal-subtitle { font-size:.88rem; color:var(--text-mid); margin-bottom:22px; }

/* Quiz */
.quiz-progress  { font-size:.82rem; color:var(--text-mid); margin-bottom:14px; font-weight:700; }
.quiz-question  { font-size:1.2rem; font-weight:800; margin-bottom:18px; }
.quiz-options   { display:grid; gap:10px; }
.quiz-option    { padding:13px 18px; border:2px solid #E0D8F5; border-radius:12px; cursor:pointer; font-weight:700; font-size:.92rem; transition:.18s; background:var(--bg); text-align:left; }
.quiz-option:hover  { border-color:var(--primary); background:#f0e8ff; }
.quiz-option.correct { background:#e8f5e9; border-color:var(--accent-green); color:#2e7d32; }
.quiz-option.wrong   { background:#ffebee; border-color:#e53935; color:#c62828; }
.quiz-feedback       { text-align:center; padding:14px; border-radius:12px; font-weight:800; margin-top:14px; }
.quiz-feedback.correct { background:#e8f5e9; color:#2e7d32; }
.quiz-feedback.wrong   { background:#ffebee; color:#c62828; }

/* Fill-in */
.fillin-question { font-size:1.3rem; font-weight:800; margin-bottom:16px; line-height:1.8; }
.fillin-input    { width:100%; padding:14px 18px; border:2px solid #E0D8F5; border-radius:12px; font-size:1.2rem; font-family:var(--font-body); font-weight:800; text-align:center; outline:none; }
.fillin-input:focus { border-color:var(--primary); }

/* Drag & Drop */
.drag-pool  { display:flex; gap:10px; flex-wrap:wrap; margin-bottom:16px; padding:14px; background:var(--bg); border-radius:12px; min-height:52px; }
.drag-item  { padding:9px 16px; background:var(--primary); color:#fff; border-radius:10px; font-weight:800; cursor:grab; user-select:none; font-size:.9rem; }
.drag-item:active { cursor:grabbing; opacity:.7; }
.drop-zones { display:grid; gap:10px; }
.drop-zone  { padding:14px 18px; border:2px dashed #C5B8E8; border-radius:12px; min-height:50px; font-weight:700; color:var(--text-mid); font-size:.88rem; transition:.2s; display:flex; align-items:center; gap:10px; }
.drop-zone .zone-label { font-size:.8rem; color:var(--text-mid); }
.drop-zone.drag-over { border-color:var(--primary); background:#f0e8ff; }
.drop-zone.has-item  { border-style:solid; border-color:var(--primary); background:#f0e8ff; }

/* Timed */
.timer-display { font-family:var(--font-head); font-size:3.5rem; color:var(--primary); text-align:center; line-height:1; }
.timer-bar  { height:10px; background:#E0D8F5; border-radius:5px; overflow:hidden; margin:8px 0 18px; }
.timer-fill { height:100%; background:var(--accent-green); border-radius:5px; transition:width 1s linear; }
.timer-fill.warning { background:var(--secondary); }
.timer-fill.danger  { background:#e53935; }
.score-display { text-align:center; font-size:1rem; font-weight:800; color:var(--text-mid); margin-bottom:14px; }

/* Results */
.result-box   { text-align:center; padding:20px 0; }
.result-score { font-family:var(--font-head); font-size:4.5rem; color:var(--primary); line-height:1; }
.result-stars { font-size:2.5rem; margin:8px 0; }
.result-msg   { font-size:1.05rem; font-weight:700; color:var(--text-mid); margin-bottom:20px; }
.result-btns  { display:flex; gap:10px; justify-content:center; flex-wrap:wrap; }

/* ===== DASHBOARD ===== */
.dashboard-grid    { display:grid; grid-template-columns:260px 1fr; gap:24px; }
.dashboard-sidebar { background:var(--white); border-radius:var(--radius); box-shadow:var(--shadow); padding:24px; text-align:center; height:fit-content; }
.dashboard-avatar  { width:84px; height:84px; border-radius:50%; border:4px solid var(--primary); margin:0 auto 12px; object-fit:cover; }
.dashboard-avatar-placeholder { width:84px; height:84px; border-radius:50%; border:4px solid var(--primary); margin:0 auto 12px; background:linear-gradient(135deg,var(--primary),var(--accent-blue)); display:flex; align-items:center; justify-content:center; font-size:2.4rem; }
.dashboard-name { font-family:var(--font-head); font-size:1.3rem; color:var(--primary); }
.dashboard-plan { display:inline-block; background:var(--yellow); color:var(--text-dark); font-size:.72rem; font-weight:800; padding:3px 12px; border-radius:20px; margin:6px 0 14px; }
.xp-label { font-size:.8rem; font-weight:700; color:var(--text-mid); display:flex; justify-content:space-between; margin-bottom:4px; }
.xp-bar   { height:10px; background:#E0D8F5; border-radius:5px; overflow:hidden; }
.xp-fill  { height:100%; background:linear-gradient(90deg,var(--primary),var(--accent-blue)); border-radius:5px; }
.stat-row  { display:flex; justify-content:space-around; margin-top:16px; }
.stat-item .num { font-family:var(--font-head); font-size:1.5rem; color:var(--primary); }
.stat-item .lbl { font-size:.72rem; color:var(--text-mid); font-weight:700; }
.dashboard-main { display:flex; flex-direction:column; gap:20px; }
.dash-card   { background:var(--white); border-radius:var(--radius); box-shadow:var(--shadow); padding:22px; }
.dash-card h3 { font-family:var(--font-head); font-size:1.2rem; color:var(--primary); margin-bottom:14px; }
.recent-scores { display:flex; flex-direction:column; gap:10px; }
.score-row     { display:flex; align-items:center; gap:12px; padding:10px 14px; background:var(--bg); border-radius:10px; }
.score-row .icon { font-size:1.3rem; }
.score-row .info { flex:1; }
.score-row .info strong { display:block; font-weight:800; font-size:.88rem; }
.score-row .info span  { font-size:.78rem; color:var(--text-mid); }
.score-row .pct { font-family:var(--font-head); font-size:1.2rem; color:var(--primary); }
.recommended-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(160px,1fr)); gap:12px; }
.rec-card  { background:var(--bg); border-radius:12px; padding:14px; text-align:center; cursor:pointer; transition:.2s; }
.rec-card:hover { transform:translateY(-3px); box-shadow:var(--shadow); }
.rec-card .icon { font-size:1.8rem; margin-bottom:6px; }
.rec-card strong { display:block; font-size:.86rem; font-weight:800; color:var(--primary); }
.rec-card span   { font-size:.76rem; color:var(--text-mid); }

/* Login prompt */
.login-prompt      { text-align:center; padding:60px 24px; }
.login-prompt .icon { font-size:4rem; margin-bottom:16px; }
.login-prompt h2   { font-family:var(--font-head); font-size:2rem; color:var(--primary); margin-bottom:10px; }
.login-prompt p    { color:var(--text-mid); margin-bottom:24px; }

/* ===== SUBSCRIBE ===== */
.subscribe-section { background:linear-gradient(135deg,var(--primary),#9B59B6); color:#fff; text-align:center; padding:60px 24px; border-radius:var(--radius); max-width:700px; margin:0 auto; }
.subscribe-section h2 { font-family:var(--font-head); font-size:2rem; margin-bottom:10px; }
.subscribe-section p  { margin-bottom:28px; opacity:.9; font-weight:600; }
.subscribe-form { display:flex; flex-direction:column; gap:12px; max-width:420px; margin:0 auto; }
.subscribe-form input, .subscribe-form select { padding:12px 16px; border-radius:50px; border:none; font-family:var(--font-body); font-size:.95rem; outline:none; }
.subscribe-form input:focus, .subscribe-form select:focus { box-shadow:0 0 0 3px var(--yellow); }

/* ===== CONTACT ===== */
.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:48px; }
.contact-info h2 { font-family:var(--font-head); font-size:1.8rem; color:var(--primary); margin-bottom:14px; }
.contact-info p  { color:var(--text-mid); margin-bottom:20px; }
.contact-item    { display:flex; align-items:flex-start; gap:12px; margin-bottom:16px; }
.contact-form    { background:var(--white); padding:32px; border-radius:var(--radius); box-shadow:var(--shadow); }
.contact-form h3 { font-family:var(--font-head); font-size:1.4rem; color:var(--primary); margin-bottom:20px; }
.form-group { margin-bottom:16px; }
.form-group label { display:block; font-weight:700; font-size:.88rem; margin-bottom:6px; color:var(--text-mid); }
.form-group input, .form-group textarea, .form-group select { width:100%; padding:12px 16px; border:2px solid #E0D8F5; border-radius:10px; font-family:var(--font-body); font-size:.92rem; outline:none; transition:border-color .2s; background:var(--bg); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color:var(--primary); }
.form-group textarea { min-height:120px; resize:vertical; }

/* ===== ABOUT ===== */
.about-grid { display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center; }
.about-text h2 { font-family:var(--font-head); font-size:1.8rem; color:var(--primary); margin-bottom:14px; }
.about-text p  { color:var(--text-mid); margin-bottom:14px; }
.about-image-placeholder { width:100%; aspect-ratio:4/3; background:linear-gradient(135deg,var(--primary),var(--accent-pink)); display:flex; align-items:center; justify-content:center; font-size:5rem; border-radius:var(--radius); }
.values-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:20px; }
.value-card  { background:var(--white); border-radius:var(--radius); padding:22px 18px; text-align:center; box-shadow:var(--shadow); }
.value-card .icon { font-size:2rem; margin-bottom:10px; }
.value-card h4 { font-family:var(--font-head); font-size:1.05rem; color:var(--primary); margin-bottom:6px; }
.value-card p  { font-size:.85rem; color:var(--text-mid); }

/* ===== FOOTER ===== */
footer { background:var(--text-dark); color:rgba(255,255,255,.85); text-align:center; padding:40px 24px; }
.footer-logo { font-family:var(--font-head); font-size:1.5rem; color:#fff; margin-bottom:14px; }
.footer-logo span { color:var(--yellow); }
.footer-nav  { display:flex; justify-content:center; gap:14px; flex-wrap:wrap; margin-bottom:14px; }
.footer-nav a { font-size:.85rem; font-weight:700; opacity:.8; transition:opacity .2s; }
.footer-nav a:hover { opacity:1; color:var(--yellow); }
.social-links { display:flex; justify-content:center; gap:10px; margin-bottom:18px; flex-wrap:wrap; }
.social-links a { display:inline-flex; align-items:center; gap:6px; background:rgba(255,255,255,.10); padding:7px 14px; border-radius:50px; font-size:.82rem; font-weight:700; transition:background .2s; }
.social-links a:hover { background:var(--primary); }
.footer-copy { font-size:.78rem; opacity:.5; margin-top:10px; }

/* ===== BREADCRUMB ===== */
.breadcrumb { padding:12px 24px; background:#fff; border-bottom:1px solid #f0e8ff; font-size:.83rem; color:var(--text-mid); }
.breadcrumb-inner { max-width:1200px; margin:0 auto; }
.breadcrumb a { color:var(--primary); font-weight:700; }

/* ===== FADE IN ===== */
.fade-in { opacity:0; transform:translateY(20px); transition:opacity .5s ease, transform .5s ease; }
.fade-in.visible { opacity:1; transform:translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width:960px) {
  .dashboard-grid { grid-template-columns:1fr; }
  .about-grid, .contact-grid { grid-template-columns:1fr; }
}
@media (max-width:768px) {
  .nav-links { display:none; flex-direction:column; position:absolute; top:70px; left:0; right:0; background:var(--white); padding:16px 24px 24px; box-shadow:var(--shadow); gap:4px; }
  .nav-links.open { display:flex; }
  .hamburger { display:flex; }
  .dropdown-menu { position:static; box-shadow:none; padding-left:16px; display:block; }
  .subscribe-section { border-radius:0; }
  .hero-btns { flex-direction:column; align-items:center; }
  .modal-box { padding:22px; }
}