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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f7fb;
    color: #172033;
    min-height: 100vh;
}


/* HEADER */

.header {
    background: #123c8c;
    color: white;
    padding: 18px 6%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-weight: 800;
    letter-spacing: 1px;
}

.header-title {
    font-weight: 600;
}


/* GENERAL */

main {
    min-height: calc(100vh - 140px);
}

.screen {
    display: none;
}

.screen.active {
    display: block;
}


/* HERO */

.hero {
    max-width: 1100px;
    margin: auto;
    padding: 70px 20px;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    color: #123c8c;
    margin-bottom: 15px;
}

.hero > p {
    font-size: 20px;
    color: #555;
    margin-bottom: 50px;
}


/* MODE CARDS */

.mode-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.mode-card {
    background: white;
    border: none;
    border-radius: 18px;
    padding: 40px 30px;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: 0.25s;
}

.mode-card:hover {
    transform: translateY(-6px);
}

.mode-icon {
    font-size: 55px;
    margin-bottom: 20px;
}

.mode-card h2 {
    color: #123c8c;
    margin-bottom: 12px;
}

.mode-card p {
    color: #666;
    margin-bottom: 25px;
}

.mode-card span {
    color: #d48b00;
    font-weight: bold;
}


/* PANELS */

.test-panel,
.result-panel {
    max-width: 900px;
    margin: 70px auto;
    background: white;
    padding: 45px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.test-panel h1,
.result-panel h1 {
    color: #123c8c;
    margin-bottom: 15px;
}

.test-panel p {
    color: #666;
    margin-bottom: 30px;
}


/* BUTTONS */

button {
    background: #123c8c;
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 16px;
    margin: 6px;
}

button:hover {
    opacity: 0.9;
}

.secondary,
.back-button {
    background: #777;
}


/* DURATION */

.duration-buttons {
    margin: 30px 0;
}


/* TEST */

.test-container {
    max-width: 1100px;
    margin: 40px auto;
    padding: 20px;
}

.test-top {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-bottom: 25px;
}

.test-top > div {
    background: white;
    padding: 18px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.06);
}

.test-top small,
.result-grid small {
    display: block;
    color: #777;
    margin-bottom: 7px;
}

.test-top strong {
    font-size: 28px;
    color: #123c8c;
}


/* PASSAGE */

.passage {
    background: white;
    padding: 30px;
    border-radius: 15px;
    font-size: 20px;
    line-height: 1.8;
    margin-bottom: 20px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.06);
}


/* TEXT AREA */

textarea {
    width: 100%;
    min-height: 220px;
    border: 3px solid #dfe5ef;
    border-radius: 15px;
    padding: 25px;
    font-size: 20px;
    line-height: 1.7;
    resize: vertical;
    outline: none;
}

textarea:focus {
    border-color: #123c8c;
}


/* RESULT */

.main-score {
    margin: 35px 0;
}

.main-score small {
    color: #777;
}

.main-score div {
    font-size: 80px;
    font-weight: 800;
    color: #123c8c;
}

.main-score span {
    font-size: 20px;
    color: #555;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-bottom: 30px;
}

.result-grid > div {
    background: #f4f7fb;
    padding: 20px;
    border-radius: 10px;
}

.result-grid strong {
    font-size: 25px;
}


/* FOOTER */

footer {
    text-align: center;
    padding: 25px;
    color: #777;
}


/* MOBILE */

@media (max-width: 700px) {

    .header {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .hero h1 {
        font-size: 36px;
    }

    .mode-container {
        grid-template-columns: 1fr;
    }

    .test-top {
        grid-template-columns: repeat(2, 1fr);
    }

    .result-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .test-panel,
    .result-panel {
        margin: 30px 15px;
        padding: 25px;
    }

}