/* =========================================================
   TypeQuest — Kids Typing Game
   ========================================================= */

/* ---------- Reset & Variables ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --c-bg:        #0d1b2a;
    --c-surface:   #1a2e46;
    --c-card:      #1e3a5f;
    --c-border:    #2a4a72;
    --c-primary:   #4fc3f7;
    --c-accent:    #ff6b9d;
    --c-yellow:    #ffd700;
    --c-green:     #56e39f;
    --c-red:       #ff5757;
    --c-purple:    #b388ff;
    --c-text:      #e8f4f8;
    --c-muted:     #7bafc4;
    --r-card:      16px;
    --shadow:      0 4px 24px rgba(0,0,0,.4);
    --transition:  .2s ease;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--c-bg);
    color: var(--c-text);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ---- Stars background ---- */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        radial-gradient(1px 1px at 20% 30%, #fff 0%, transparent 100%),
        radial-gradient(1px 1px at 80% 10%, #fff 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 50% 60%, rgba(255,255,255,.8) 0%, transparent 100%),
        radial-gradient(1px 1px at 10% 80%, #fff 0%, transparent 100%),
        radial-gradient(1px 1px at 90% 70%, #fff 0%, transparent 100%),
        radial-gradient(1px 1px at 35% 15%, rgba(255,255,255,.6) 0%, transparent 100%),
        radial-gradient(1px 1px at 65% 85%, rgba(255,255,255,.6) 0%, transparent 100%),
        radial-gradient(1px 1px at 5% 45%, rgba(255,255,255,.4) 0%, transparent 100%),
        radial-gradient(1px 1px at 95% 35%, rgba(255,255,255,.4) 0%, transparent 100%);
    pointer-events: none;
    z-index: 0;
}

/* ---------- Layout ---------- */
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }
.page      { min-height: 100vh; display: flex; flex-direction: column; }

/* ---------- Nav ---------- */
.navbar {
    background: rgba(13,27,42,.9);
    border-bottom: 1px solid var(--c-border);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 12px 0;
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo { font-size: 1.6rem; font-weight: 900; color: var(--c-primary); text-decoration: none; letter-spacing: -1px; }
.logo span { color: var(--c-accent); }
.nav-links { display: flex; gap: 12px; }
.nav-links a {
    color: var(--c-muted);
    text-decoration: none;
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: 600;
    font-size: .9rem;
    transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active {
    color: var(--c-primary);
    background: rgba(79,195,247,.12);
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-decoration: none;
    letter-spacing: .3px;
}
.btn:active { transform: scale(.97); }
.btn-primary  { background: var(--c-primary);  color: #0d1b2a; }
.btn-primary:hover { background: #81d4fa; box-shadow: 0 0 20px rgba(79,195,247,.4); }
.btn-accent   { background: var(--c-accent);   color: #fff; }
.btn-accent:hover { background: #ff8fb5; box-shadow: 0 0 20px rgba(255,107,157,.4); }
.btn-outline  { background: transparent; border: 2px solid var(--c-border); color: var(--c-text); }
.btn-outline:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn-green    { background: var(--c-green); color: #0d1b2a; }
.btn-green:hover { background: #80ffbe; }
.btn-sm { padding: 8px 16px; font-size: .85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.15rem; }

/* ---------- Cards ---------- */
.card {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--r-card);
    padding: 24px;
    box-shadow: var(--shadow);
}

/* =====================================================
   HOME PAGE
   ===================================================== */
.hero {
    text-align: center;
    padding: 80px 20px 60px;
}
.hero-icon { font-size: 5rem; margin-bottom: 16px; animation: float 3s ease-in-out infinite; display: block; }
.hero h1 {
    font-size: clamp(2.2rem, 6vw, 3.8rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--c-primary), var(--c-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    line-height: 1.1;
}
.hero p { font-size: 1.15rem; color: var(--c-muted); max-width: 520px; margin: 0 auto 32px; line-height: 1.6; }

/* Stats bar */
.stats-bar {
    display: flex;
    justify-content: center;
    gap: 32px;
    padding: 24px;
    margin: 0 0 48px;
    background: var(--c-surface);
    border-radius: var(--r-card);
    border: 1px solid var(--c-border);
    flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-value { font-size: 1.8rem; font-weight: 900; color: var(--c-primary); display: block; }
.stat-label { font-size: .8rem; color: var(--c-muted); text-transform: uppercase; letter-spacing: 1px; }

/* Level grid */
.section-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 24px;
    color: var(--c-text);
}
.section-title span { color: var(--c-primary); }

.levels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 60px;
}

.level-card {
    background: var(--c-card);
    border: 2px solid var(--c-border);
    border-radius: var(--r-card);
    padding: 24px 20px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: var(--c-text);
    display: block;
}
.level-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--c-primary), var(--c-purple));
    opacity: 0;
    transition: var(--transition);
}
.level-card:hover { border-color: var(--c-primary); transform: translateY(-4px); box-shadow: 0 8px 32px rgba(79,195,247,.2); }
.level-card:hover::before { opacity: .06; }
.level-card.locked { opacity: .45; cursor: not-allowed; pointer-events: none; }
.level-card.locked:hover { transform: none; }
.level-card.completed { border-color: var(--c-green); }

.level-num  { font-size: .75rem; font-weight: 700; color: var(--c-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 6px; }
.level-icon { font-size: 2.4rem; margin-bottom: 10px; display: block; position: relative; z-index: 1; }
.level-name { font-size: 1.1rem; font-weight: 800; margin-bottom: 6px; position: relative; z-index: 1; }
.level-desc { font-size: .82rem; color: var(--c-muted); line-height: 1.4; position: relative; z-index: 1; }

.level-stars {
    display: flex;
    gap: 4px;
    margin-top: 12px;
    position: relative;
    z-index: 1;
}
.star { font-size: 1.1rem; filter: grayscale(1) opacity(.3); }
.star.earned { filter: none; animation: starPop .3s ease; }

.level-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--c-green);
    color: #0d1b2a;
    font-size: .7rem;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: 10px;
    z-index: 1;
}

/* =====================================================
   GAME PAGE
   ===================================================== */
.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.game-title { font-size: 1.4rem; font-weight: 800; }
.game-title small { font-size: .85rem; color: var(--c-muted); font-weight: 400; display: block; }

/* Metrics bar */
.metrics {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.metric {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 12px;
    padding: 10px 18px;
    text-align: center;
    min-width: 80px;
}
.metric-value { font-size: 1.4rem; font-weight: 900; color: var(--c-primary); display: block; line-height: 1; }
.metric-label { font-size: .7rem; color: var(--c-muted); text-transform: uppercase; letter-spacing: 1px; margin-top: 2px; }
.metric.timer .metric-value { color: var(--c-yellow); }
.metric.timer.danger .metric-value { color: var(--c-red); animation: pulse 1s infinite; }
.metric.accuracy .metric-value { color: var(--c-green); }

/* Typing area */
.typing-section {
    background: var(--c-surface);
    border: 2px solid var(--c-border);
    border-radius: var(--r-card);
    padding: 28px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.text-display {
    font-family: 'Courier New', Courier, monospace;
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    line-height: 2;
    letter-spacing: .04em;
    margin-bottom: 20px;
    min-height: 80px;
    word-break: break-word;
    user-select: none;
}

.char { position: relative; }
.char.correct  { color: var(--c-green); }
.char.wrong    { color: var(--c-red); text-decoration: underline wavy var(--c-red); }
.char.current  {
    background: rgba(79,195,247,.25);
    border-radius: 3px;
    outline: 2px solid var(--c-primary);
}
.char.pending  { color: var(--c-muted); }

/* Blinking cursor on current char */
.char.current::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 2px;
    width: 2px;
    height: 75%;
    background: var(--c-primary);
    animation: blink .8s step-end infinite;
}

.typing-input {
    width: 100%;
    padding: 14px 18px;
    background: rgba(0,0,0,.3);
    border: 2px solid var(--c-border);
    border-radius: 12px;
    color: var(--c-text);
    font-size: 1.1rem;
    font-family: 'Courier New', monospace;
    outline: none;
    transition: var(--transition);
    resize: none;
    caret-color: var(--c-primary);
}
.typing-input:focus { border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(79,195,247,.15); }
.typing-input.wrong-shake { animation: shake .3s ease; border-color: var(--c-red); }

/* Progress bar */
.progress-bar-wrap {
    background: rgba(0,0,0,.3);
    border-radius: 999px;
    height: 8px;
    margin-bottom: 20px;
    overflow: hidden;
}
.progress-bar-fill {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--c-primary), var(--c-purple));
    transition: width .2s ease;
    width: 0%;
}

/* Star targets row */
.star-targets {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.star-target {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(0,0,0,.25);
    border: 1px solid var(--c-border);
    border-radius: 20px;
    padding: 5px 12px;
    font-size: .82rem;
    color: var(--c-muted);
}
.star-target .star-icon { font-size: .9rem; }

/* Controls row */
.game-controls {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

/* Result overlay */
.result-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.75);
    backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: 20px;
}
.result-overlay.show { display: flex; animation: fadeIn .3s ease; }

.result-card {
    background: var(--c-card);
    border: 2px solid var(--c-border);
    border-radius: 24px;
    padding: 40px 36px;
    max-width: 480px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,.6);
    animation: slideUp .4s cubic-bezier(.17,.67,.41,1.1);
}
.result-icon { font-size: 4rem; margin-bottom: 12px; display: block; }
.result-title { font-size: 1.8rem; font-weight: 900; margin-bottom: 6px; }
.result-subtitle { color: var(--c-muted); margin-bottom: 24px; }
.result-stars { font-size: 2.2rem; margin-bottom: 20px; display: flex; gap: 8px; justify-content: center; }
.result-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 28px; }
.result-stat { background: var(--c-surface); border-radius: 12px; padding: 14px; }
.result-stat-value { font-size: 1.6rem; font-weight: 900; color: var(--c-primary); }
.result-stat-label { font-size: .75rem; color: var(--c-muted); text-transform: uppercase; letter-spacing: 1px; }
.result-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* Achievement popup */
.achievement-popup {
    position: fixed;
    top: 80px;
    right: 20px;
    background: linear-gradient(135deg, #1a3a1a, #1e4a2a);
    border: 2px solid var(--c-green);
    border-radius: 16px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    z-index: 300;
    max-width: 340px;
    box-shadow: 0 8px 32px rgba(86,227,159,.25);
    transform: translateX(400px);
    transition: transform .4s cubic-bezier(.17,.67,.41,1.1);
}
.achievement-popup.show { transform: translateX(0); }
.achievement-popup.hiding { transform: translateX(400px); }
.ach-popup-icon { font-size: 2.2rem; flex-shrink: 0; }
.ach-popup-label { font-size: .7rem; color: var(--c-green); font-weight: 800; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 2px; }
.ach-popup-title { font-weight: 800; font-size: 1rem; }
.ach-popup-desc { font-size: .8rem; color: var(--c-muted); }

/* Virtual keyboard */
.keyboard-wrap { margin-bottom: 24px; }
.keyboard-label { font-size: .8rem; color: var(--c-muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 1px; }
.keyboard {
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: center;
    padding: 16px;
    background: rgba(0,0,0,.3);
    border-radius: 12px;
    border: 1px solid var(--c-border);
    overflow-x: auto;
}
.key-row { display: flex; gap: 5px; }
.key {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 6px;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-bottom: 3px solid rgba(0,0,0,.4);
    border-radius: 6px;
    font-size: .78rem;
    font-weight: 700;
    color: var(--c-muted);
    transition: var(--transition);
    user-select: none;
}
.key.active     { background: var(--c-primary); color: #0d1b2a; border-color: var(--c-primary); transform: translateY(1px); }
.key.correct    { background: rgba(86,227,159,.25); color: var(--c-green); border-color: var(--c-green); }
.key.wrong-key  { background: rgba(255,87,87,.25); color: var(--c-red); border-color: var(--c-red); }
.key.space-key  { min-width: 200px; }
.key.wide       { min-width: 54px; }

/* =====================================================
   ACHIEVEMENTS PAGE
   ===================================================== */
.achievements-header {
    text-align: center;
    padding: 48px 0 32px;
}
.achievements-header h1 { font-size: 2.4rem; font-weight: 900; margin-bottom: 8px; }
.achievements-header p  { color: var(--c-muted); font-size: 1rem; }

.ach-progress-bar {
    background: rgba(0,0,0,.3);
    border-radius: 999px;
    height: 10px;
    margin: 16px auto;
    max-width: 400px;
    overflow: hidden;
}
.ach-progress-fill {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--c-green), var(--c-primary));
    transition: width .5s ease;
}
.ach-count { color: var(--c-muted); font-size: .9rem; margin-top: 6px; }

.ach-categories { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 28px; justify-content: center; }
.ach-cat-btn {
    padding: 7px 16px;
    border-radius: 20px;
    border: 2px solid var(--c-border);
    background: transparent;
    color: var(--c-muted);
    font-size: .85rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}
.ach-cat-btn.active, .ach-cat-btn:hover {
    border-color: var(--c-primary);
    color: var(--c-primary);
    background: rgba(79,195,247,.08);
}

.ach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 60px;
}

.ach-item {
    background: var(--c-card);
    border: 2px solid var(--c-border);
    border-radius: var(--r-card);
    padding: 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.ach-item.unlocked { border-color: var(--c-green); }
.ach-item.unlocked::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(86,227,159,.08), transparent);
}
.ach-item.locked { opacity: .5; }
.ach-icon { font-size: 2.2rem; margin-bottom: 10px; display: block; }
.ach-title { font-weight: 800; font-size: .95rem; margin-bottom: 4px; }
.ach-desc  { font-size: .8rem; color: var(--c-muted); line-height: 1.4; }
.ach-unlocked-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--c-green);
    color: #0d1b2a;
    font-size: .65rem;
    font-weight: 800;
    padding: 2px 7px;
    border-radius: 10px;
}

/* =====================================================
   GAME OVER / START SCREEN overlays
   ===================================================== */
.start-overlay {
    position: absolute;
    inset: 0;
    background: rgba(13,27,42,.92);
    border-radius: calc(var(--r-card) - 2px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    z-index: 10;
    backdrop-filter: blur(4px);
}
.start-overlay h2 { font-size: 1.6rem; font-weight: 800; }
.start-overlay p  { color: var(--c-muted); font-size: .95rem; text-align: center; padding: 0 20px; }

/* =====================================================
   ANIMATIONS
   ===================================================== */
@keyframes float    { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }
@keyframes blink    { 0%,100%{opacity:1} 50%{opacity:0} }
@keyframes pulse    { 0%,100%{transform:scale(1)} 50%{transform:scale(1.05)} }
@keyframes shake    { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)} }
@keyframes slideUp  { from{transform:translateY(40px);opacity:0} to{transform:translateY(0);opacity:1} }
@keyframes fadeIn   { from{opacity:0} to{opacity:1} }
@keyframes starPop  { 0%{transform:scale(0)} 70%{transform:scale(1.3)} 100%{transform:scale(1)} }
@keyframes confetti { 0%{transform:translateY(-10px) rotate(0deg);opacity:1} 100%{transform:translateY(100vh) rotate(720deg);opacity:0} }
@keyframes bounce   { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

.bounce { animation: bounce .5s ease infinite; }

/* Confetti pieces */
.confetti-piece {
    position: fixed;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    pointer-events: none;
    animation: confetti 2s ease forwards;
    z-index: 999;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 600px) {
    .stats-bar   { gap: 20px; }
    .metrics     { gap: 10px; }
    .metric      { min-width: 64px; padding: 8px 12px; }
    .metric-value{ font-size: 1.2rem; }
    .typing-section { padding: 16px; }
    .text-display { font-size: 1rem; }
    .key { min-width: 28px; height: 30px; font-size: .65rem; }
    .key.space-key { min-width: 140px; }
}

@media (max-width: 400px) {
    .keyboard { display: none; }
}