/* ===== 1. BASIC SETTINGS ===== */

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

:root {
    --bg-color: #100B1D;
    --card-color: #1C1430;
    --purple: #8B5CF6;
    --light-purple: #C4B5FD;
    --text-color: #F5F3FF;
    --muted-color: #B8AECF;
    --border-color: #392852;
    --success-color: #34D399;
    --error-color: #FB7185;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    line-height: 1.6;
}

/* ===== 2. HEADER AND LOGO ===== */

header {
    width: 100%;
    padding: 22px 7%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(28, 20, 48, 0.85);
}

header h1 {
    font-size: 1.8rem;
    color: var(--light-purple);
    font-weight: 800;
    letter-spacing: 1px;
}

header p {
    color: var(--muted-color);
    font-size: 0.95rem;
}

/* ===== 3. MAIN SECTION ===== */

main {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 70px 24px;
}

section {
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 36px;
    text-align: center;
    background: linear-gradient(
        145deg,
        #211638,
        #171025
    );
    border: 1px solid var(--border-color);
    border-radius: 24px;
    box-shadow: 0 18px 55px rgba(0, 0, 0, 0.25);
}

/* ===== 4. HEADINGS AND TEXT ===== */

h2 {
    font-size: clamp(1.7rem, 4vw, 2.6rem);
    line-height: 1.25;
    margin-bottom: 16px;
    color: var(--text-color);
}

section > p {
    color: var(--muted-color);
    font-size: 1.05rem;
    margin-bottom: 28px;
}

/* ===== 5. INPUT BOXES ===== */

input,
select {
    display: block;
    width: 100%;
    max-width: 420px;
    margin: 12px auto 20px;
    padding: 14px 16px;
    font: inherit;
    color: var(--text-color);
    background: #120D20;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    outline: none;
}

input::placeholder {
    color: #9688AD;
}

input:focus,
select:focus {
    border-color: var(--purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.16);
}

/* ===== 6. BUTTONS ===== */

button {
    display: inline-block;
    max-width: 100%;
    padding: 13px 26px;
    border: 1px solid transparent;
    border-radius: 12px;
    background: var(--purple);
    color: #FFFFFF;
    font-size: 1rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.2s ease,
                transform 0.2s ease,
                box-shadow 0.2s ease;
}

button:hover {
    background: #7C3AED;
    box-shadow: 0 6px 22px rgba(139, 92, 246, 0.25);
    transform: translateY(-2px);
}

button:focus-visible {
    outline: 3px solid var(--light-purple);
    outline-offset: 4px;
}

button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ===== 7. QUIZ CARDS AND OPTIONS ===== */

.quiz-card {
    width: 100%;
    padding: 26px;
    margin: 20px 0;
    text-align: left;
    background: var(--card-color);
    border: 1px solid var(--border-color);
    border-radius: 18px;
}

.quiz-card h3 {
    margin-bottom: 16px;
    font-size: 1.25rem;
}

.option-button {
    display: block;
    width: 100%;
    margin: 10px 0;
    text-align: left;
    background: #261B3B;
    border: 1px solid #45315F;
    overflow-wrap: anywhere;
}

.option-button:hover {
    background: #35234F;
}

.option-button.correct {
    border-color: var(--success-color);
    background: #12352F;
}

.option-button.incorrect {
    border-color: var(--error-color);
    background: #3D1D30;
}

/* ===== 8. PROGRESS AND RESULTS ===== */

.progress-bar {
    width: 100%;
    height: 9px;
    margin: 18px 0;
    overflow: hidden;
    background: #302341;
    border-radius: 20px;
}

.progress-fill {
    width: 0;
    height: 100%;
    background: linear-gradient(
        90deg,
        #8B5CF6,
        #D8B4FE
    );
    border-radius: inherit;
    transition: width 0.3s ease;
}

.score {
    margin: 20px 0;
    color: var(--light-purple);
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 800;
}

.message {
    margin: 14px 0;
    color: var(--muted-color);
}

.hidden {
    display: none !important;
}

/* ===== 9. LINKS ===== */

a {
    color: var(--light-purple);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ===== 10. FOOTER ===== */

footer {
    padding: 24px 16px;
    text-align: center;
    color: var(--muted-color);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

/* ===== 11. TABLETS ===== */

@media (max-width: 768px) {
    header {
        padding: 20px 5%;
    }

    main {
        padding: 45px 18px;
    }

    section {
        padding: 36px 24px;
    }

    .quiz-card {
        padding: 22px;
    }
}

/* ===== 12. MOBILE PHONES ===== */

@media (max-width: 480px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        padding: 18px 20px;
    }

    header h1 {
        font-size: 1.55rem;
    }

    header p {
        font-size: 0.88rem;
    }

    main {
        padding: 28px 14px;
    }

    section {
        padding: 28px 18px;
        border-radius: 18px;
    }

    h2 {
        font-size: 1.65rem;
    }

    section > p {
        font-size: 0.95rem;
    }

    button {
        width: 100%;
        padding: 14px 18px;
    }

    .quiz-card {
        padding: 17px;
        border-radius: 14px;
    }

    .quiz-card h3 {
        font-size: 1.1rem;
    }

    input,
    select {
        font-size: 16px;
    }
}

/* ===== 13. REDUCED ANIMATION ===== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition: none !important;
    }
}
/* Welcome screen improvements */

body {
    display: flex;
    flex-direction: column;
}

header {
    flex-shrink: 0;
}

main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 40px 20px;
}

#welcomeScreen {
    max-width: 650px;
    width: 100%;
    margin: auto;
    padding: 45px 35px;
    text-align: center;
}

.logo {
    width: 78px;
    height: 78px;
    margin: 0 auto 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 22px;
    background: linear-gradient(135deg, #8B5CF6, #5B21B6);
    color: white;
    font-size: 2rem;
    font-weight: bold;
    box-shadow: 0 8px 25px #8b5cf640;
}

.tagline {
    color: #C4B5FD;
    font-size: 0.75rem;
    font-weight: bold;
    letter-spacing: 2px;
    margin-bottom: 14px;
}

#welcomeScreen h2 {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    margin-bottom: 15px;
}

.description {
    color: #B8AECF;
    max-width: 450px;
    margin: 0 auto 22px;
}

#welcomeScreen input,
#welcomeScreen select {
    max-width: 450px;
    margin: 12px auto;
}

#welcomeScreen button {
    width: 100%;
    max-width: 450px;
    padding: 17px 24px;
    margin-top: 15px;
    font-size: 1.1rem;
    background: linear-gradient(135deg, #8B5CF6, #6D28D9);
    border-radius: 14px;
}

.note {
    color: #C4B5FD;
    margin-top: 22px;
    font-size: 0.9rem;
}

footer {
    flex-shrink: 0;
}

@media (max-width: 480px) {
    #welcomeScreen {
        padding: 30px 18px;
    }

    .logo {
        width: 65px;
        height: 65px;
        font-size: 1.7rem;
    }

    .tagline {
        letter-spacing: 1px;
        font-size: 0.68rem;
    }
}