:root {
    font-family:
        Inter,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;

    color: #e8eaf0;
    background: #101116;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;

    min-height: 100vh;

    background: radial-gradient(circle at top, #202536 0%, #101116 50%);

    color: #e8eaf0;
}

button,
input,
textarea {
    font: inherit;
}

button,
input {
    outline: none;
}

.app {
    width: min(1100px, calc(100% - 32px));

    margin: 0 auto;

    padding: 48px 0;
}

.header {
    display: flex;

    align-items: flex-end;
    justify-content: space-between;

    gap: 24px;

    margin-bottom: 24px;
}

.header h1 {
    margin: 0 0 6px;

    font-size: 2rem;
}

.header p {
    margin: 0;

    color: #9298a8;
}

.button {
    border: 0;
    border-radius: 9px;

    padding: 10px 16px;

    color: white;
    background: #5967ed;

    font-weight: 600;

    cursor: pointer;

    transition:
        background 0.15s ease,
        transform 0.1s ease;
}

.button:hover {
    background: #6977f5;
}

.button:active {
    transform: scale(0.97);
}

.button:disabled {
    opacity: 0.5;

    cursor: not-allowed;
}

.controls,
.practice-container {
    border: 1px solid #292d38;
    border-radius: 16px;

    background: rgba(23, 25, 32, 0.92);

    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
}

.controls {
    display: flex;

    align-items: center;

    gap: 28px;

    padding: 18px 20px;

    margin-bottom: 18px;

    flex-wrap: wrap;
}

.control-group {
    display: flex;

    align-items: center;

    gap: 10px;
}

.control-group > label:not(.toggle) {
    color: #aeb3c0;

    white-space: nowrap;
}

.toggle {
    display: flex;

    align-items: center;

    gap: 10px;

    cursor: pointer;

    user-select: none;
}

.toggle input {
    position: absolute;

    opacity: 0;

    pointer-events: none;
}

.slider {
    position: relative;

    width: 42px;
    height: 24px;

    border-radius: 999px;

    background: #383d49;

    transition: background 0.15s ease;
}

.slider::after {
    content: "";

    position: absolute;

    width: 18px;
    height: 18px;

    top: 3px;
    left: 3px;

    border-radius: 50%;

    background: white;

    transition: transform 0.15s ease;
}

.toggle input:checked + .slider {
    background: #6977f5;
}

.toggle input:checked + .slider::after {
    transform: translateX(18px);
}

input[type="number"] {
    width: 72px;

    padding: 8px 9px;

    color: #f3f4f7;
    background: #101218;

    border: 1px solid #343946;
    border-radius: 8px;

    outline: none;
}

input[type="number"]:focus {
    border-color: #6977f5;

    box-shadow: 0 0 0 2px rgba(105, 119, 245, 0.12);
}

.paragraph-length {
    display: flex;

    flex-direction: column;

    align-items: flex-start;

    gap: 5px;
}

.range-inputs {
    display: flex;

    align-items: center;

    gap: 7px;

    color: #777e8e;

    font-size: 0.9rem;
}

.stats {
    display: flex;

    gap: 24px;

    margin-left: auto;
}

.stats div {
    display: grid;

    gap: 2px;

    text-align: right;
}

.stats span {
    color: #777e8e;

    font-size: 0.72rem;

    letter-spacing: 0.08em;

    text-transform: uppercase;
}

.stats strong {
    font-size: 1rem;
}

.practice-container {
    padding: 28px;
}

.dictionary-status {
    margin-bottom: 18px;

    color: #777e8e;

    font-size: 0.8rem;
}

.dictionary-status.ready {
    color: #7dcf95;
}

.dictionary-status.error {
    color: #ff8c98;
}

.paragraph-display {
    min-height: 190px;

    margin-bottom: 24px;

    font-size: clamp(1.2rem, 2.2vw, 1.55rem);

    line-height: 1.9;

    letter-spacing: 0.01em;
}

.word {
    border-radius: 4px;

    padding: 2px 1px;

    transition:
        color 0.08s ease,
        background 0.08s ease;
}

.word.current {
    background: rgba(105, 119, 245, 0.14);
}

.character {
    white-space: pre-wrap;
}

.character.correct {
    color: #9ce6b1;
}

.character.incorrect-character {
    color: #ff8c98;

    text-decoration-line: underline;

    text-decoration-thickness: 2px;
}

.word.blacked-out {
    color: #08090c;

    background: #08090c;

    border-radius: 3px;

    user-select: none;
}

.word.blacked-out .incorrect-character {
    color: #ff8c98;

    background: #08090c;
}
#typingInput {
    display: block;

    width: 100%;

    min-height: 120px;

    padding: 16px;

    resize: vertical;

    color: #e8eaf0;

    background: #101218;

    border: 1px solid #343946;

    border-radius: 10px;

    outline: none;

    line-height: 1.6;
}

#typingInput:focus {
    border-color: #6977f5;

    box-shadow: 0 0 0 3px rgba(105, 119, 245, 0.12);
}

#typingInput:disabled {
    opacity: 0.5;

    cursor: not-allowed;
}

.hint {
    margin: 12px 0 0;

    color: #737989;

    font-size: 0.85rem;

    line-height: 1.5;
}

@media (max-width: 850px) {
    .stats {
        width: 100%;

        margin-left: 0;

        justify-content: space-between;
    }

    .stats div {
        text-align: left;
    }
}

@media (max-width: 700px) {
    .app {
        padding: 24px 0;
    }

    .header {
        align-items: stretch;

        flex-direction: column;
    }

    .controls {
        align-items: flex-start;

        flex-direction: column;

        gap: 18px;
    }

    .paragraph-length {
        width: 100%;
    }

    .stats {
        width: 100%;
    }
}

.control-label {
    color: #aeb3c0;

    white-space: nowrap;
}

.sr-only {
    position: absolute;

    width: 1px;
    height: 1px;

    padding: 0;
    margin: -1px;

    overflow: hidden;

    clip: rect(0, 0, 0, 0);

    white-space: nowrap;

    border: 0;
}

.select-input {
    padding: 8px 32px 8px 9px;

    color: #f3f4f7;
    background: #101218;

    border: 1px solid #343946;
    border-radius: 8px;

    outline: none;

    cursor: pointer;
}

.select-input:focus {
    border-color: #6977f5;

    box-shadow: 0 0 0 2px rgba(105, 119, 245, 0.12);
}

.paragraph-length[hidden] {
    display: none;
}

.header-buttons {
    display: flex;

    align-items: center;

    gap: 10px;
}

.button-secondary {
    color: #d7dae3;
    background: #343946;
}

.button-secondary:hover {
    background: #414656;
}

.results-overlay {
    position: fixed;

    inset: 0;

    display: flex;

    align-items: center;
    justify-content: center;

    padding: 24px;

    background: rgba(5, 6, 10, 0.72);

    backdrop-filter: blur(6px);

    z-index: 1000;
}

.results-overlay[hidden] {
    display: none;
}

.results-popup {
    width: min(420px, 100%);

    padding: 32px;

    border: 1px solid #343946;
    border-radius: 18px;

    background: #171920;

    box-shadow:
        0 24px 80px rgba(0, 0, 0, 0.45),
        0 0 0 1px rgba(255, 255, 255, 0.02);
}

.results-popup h2 {
    margin: 0;

    font-size: 1.6rem;
}

.results-subtitle {
    margin: 8px 0 24px;

    color: #858b9b;
}

.results-stats {
    display: grid;

    grid-template-columns: repeat(2, 1fr);

    gap: 12px;

    margin-bottom: 24px;
}

.results-stats div {
    display: grid;

    gap: 5px;

    padding: 16px;

    border: 1px solid #292d38;
    border-radius: 10px;

    background: #101218;

    text-align: center;
}

.results-stats span {
    color: #777e8e;

    font-size: 0.72rem;

    letter-spacing: 0.08em;

    text-transform: uppercase;
}

.results-stats strong {
    font-size: 1.6rem;
}

.results-actions {
    display: flex;

    gap: 10px;
}

.results-actions .button {
    flex: 1;
}

@media (max-width: 700px) {
    .header-buttons {
        width: 100%;
    }

    .header-buttons .button {
        flex: 1;
    }

    .results-actions {
        flex-direction: column;
    }
}