/* ===== Typing Speed — Neon Edition ===== */
:root {
    --bg-primary: #060614;
    --bg-card: rgba(15, 15, 35, 0.85);
    --text-primary: #e4e4f0;
    --text-dim: rgba(228, 228, 240, 0.5);
    --neon-green: #00ff88;
    --neon-blue: #00d4ff;
    --neon-pink: #ff2d75;
    --neon-purple: #b44dff;
    --neon-yellow: #ffe600;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 40%, rgba(180, 77, 255, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 60%, rgba(0, 212, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

#app {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 620px;
    padding: 16px 20px 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

/* Top Bar */
#top-bar {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#back-link {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    color: var(--neon-purple);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

#back-link:hover {
    opacity: 1;
    color: var(--neon-green);
}

#mute-btn {
    background: none;
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: 8px;
    padding: 4px 10px;
    font-size: 0.85rem;
    cursor: pointer;
    color: var(--neon-green);
    font-family: 'Orbitron', sans-serif;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}

.mute-label {
    font-size: 0.5rem;
    letter-spacing: 0.1em;
}

/* Header */
#header {
    text-align: center;
}

#title {
    font-family: 'Orbitron', sans-serif;
    font-weight: 900;
    font-size: clamp(1.2rem, 5vw, 1.8rem);
    letter-spacing: 0.1em;
    background: linear-gradient(135deg, var(--neon-purple), var(--neon-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 18px rgba(180, 77, 255, 0.3));
}

#subtitle {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.5rem;
    letter-spacing: 0.4em;
    color: var(--text-dim);
    margin-top: 2px;
}

/* HUD */
#hud {
    display: flex;
    gap: 16px;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    padding: 10px 20px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    flex-wrap: wrap;
    justify-content: center;
}

.hud-item {
    text-align: center;
}

.hud-label {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.4rem;
    letter-spacing: 0.15em;
    color: var(--text-dim);
    display: block;
}

.hud-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--neon-green);
}

/* Duration selector */
#duration-selector {
    display: flex;
    gap: 8px;
}

.dur-btn {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.55rem;
    letter-spacing: 0.05em;
    padding: 6px 14px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-dim);
    cursor: pointer;
    transition: var(--transition);
}

.dur-btn.active {
    border-color: var(--neon-blue);
    color: var(--neon-blue);
    background: rgba(0, 212, 255, 0.1);
}

.dur-btn:hover {
    border-color: var(--neon-blue);
    color: var(--neon-blue);
}

/* Text display */
#text-display {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    line-height: 1.8;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    padding: 20px 24px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    width: 100%;
    min-height: 120px;
    position: relative;
    letter-spacing: 0.02em;
    white-space: pre-wrap;
    word-wrap: break-word;
}

#text-display .char {
    transition: color 0.1s;
}

#text-display .char.correct {
    color: var(--neon-green);
}

#text-display .char.incorrect {
    color: var(--neon-pink);
    text-decoration: underline;
}

#text-display .char.current {
    background: rgba(0, 212, 255, 0.2);
    border-radius: 2px;
    box-shadow: 0 0 6px rgba(0, 212, 255, 0.3);
}

#text-display .char.pending {
    color: var(--text-dim);
}

/* Input */
#input-field {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    padding: 12px 18px;
    border: 1px solid rgba(180, 77, 255, 0.3);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    width: 100%;
    outline: none;
    transition: var(--transition);
}

#input-field:focus {
    border-color: var(--neon-blue);
    box-shadow: 0 0 16px rgba(0, 212, 255, 0.15);
}

/* Result */
#result-panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    padding: 20px 28px;
    border-radius: 14px;
    border: 1px solid rgba(0, 255, 136, 0.15);
    text-align: center;
    width: 100%;
}

#result-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--neon-green);
}

#result-stats {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.neon-btn {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    padding: 10px 28px;
    border: 1px solid var(--neon-green);
    border-radius: 10px;
    background: rgba(0, 255, 136, 0.08);
    color: var(--neon-green);
    cursor: pointer;
    transition: var(--transition);
}

.neon-btn:hover {
    background: rgba(0, 255, 136, 0.18);
    box-shadow: 0 0 24px rgba(0, 255, 136, 0.2);
}

.hidden {
    display: none !important;
}

#footer {
    text-align: center;
    font-size: 0.65rem;
    color: var(--text-dim);
    margin-top: 8px;
}

/* Responsive */
@media (max-width: 520px) {
    body {
        align-items: flex-start;
    }

    #app {
        padding: 6px 10px calc(8px + env(safe-area-inset-bottom, 20px));
        gap: 8px;
    }

    #text-display {
        font-size: 0.9rem;
        padding: 14px 16px;
        min-height: 100px;
    }

    #hud {
        gap: 10px;
        padding: 8px 14px;
    }

    .hud-value {
        font-size: 0.85rem;
    }

    #footer {
        padding-bottom: env(safe-area-inset-bottom, 20px);
        font-size: 0.55rem;
    }
}