:root {
    --tg-blue: #0088cc;
    --tg-blue-dark: #0077b6;
    --tg-bg: #f1f5f9;
    --tg-card: #ffffff;
    --tg-text: #0f172a;
    --tg-muted: #64748b;
    --tg-radius: 18px;
}

body {
    background: var(--tg-bg);
    color: var(--tg-text);
}

body {
    font-family: 'Inter', sans-serif;
    padding-bottom: 80px;
}

.answer-btn {
    transition: all .2s ease;
}

.answer-btn:hover {
    transform: translateY(-2px);
}

.test-card {
    background: linear-gradient(180deg, #ffffff, #f8fafc);
    border-radius: var(--tg-radius);
    padding: 18px 12px 42px;
    text-align: center;
    cursor: pointer;
    height: 100%;
    transition: all .35s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .08);
    position: relative;
}

.test-card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(0, 136, 204, .15), transparent);
    opacity: 0;
    transition: .3s;
}

.test-card:hover::after {
    opacity: 1;
}

.test-card:hover {
    transform: translateY(-6px) scale(1.02);
}


.test-icon {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 10px;
    font-size: 22px;
}

.test-title {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
}

.test-meta {
    font-size: 12px;
    color: #6c757d;
}

.question-footer {
    position: absolute;
    bottom: 0;
    left: 0;

    width: 100%;
    padding: 6px 10px;

    background: #0d6efd;
    /* bootstrap primary – professional */
    color: #fff;

    font-size: 12px;
    font-weight: 600;
    text-align: center;
    letter-spacing: 0.3px;

    border-radius: 0 0 14px 14px;

    /* animation */
    transform: translateX(-100%);
    animation: slideInLeft 0.6s ease-out forwards;
    animation-delay: 0.2s;
}

@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.navbar {
    background: linear-gradient(135deg, #0d6efd, #084298);
    box-shadow: 0 6px 20px rgba(13, 110, 253, 0.25);
}

.navbar-brand {
    letter-spacing: 0.4px;
}

.navbar-brand img {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.navbar .btn-light {
    font-weight: 600;
    border-radius: 999px;
    padding: 4px 14px;
    transition: all 0.25s ease;
}

.navbar .btn-light:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.15);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 64px;
    background: #ffffff;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 1050;
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
}

/* Nav item */
.bottom-nav .nav-item {
    flex: 1;
    text-align: center;
    text-decoration: none;
    color: #6c757d;
    font-size: 11px;
    font-weight: 500;
    transition: all 0.25s ease;
}

/* Icon */
.bottom-nav .nav-item i {
    display: block;
    font-size: 22px;
    margin-bottom: 2px;
}

/* Active */
.bottom-nav .nav-item.active {
    color: #0d6efd;
}

/* Hover */
.bottom-nav .nav-item:hover {
    color: #0d6efd;
    transform: translateY(-2px);
}

/* RESULT MODAL */
.result-modal {
    border-radius: 18px;
    background: linear-gradient(135deg, #ffffff, #f4f8ff);
    box-shadow: 0 20px 50px rgba(0, 0, 0, .25);
}

.result-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, #0d6efd, #00c6ff);
    color: #fff;
    font-size: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    box-shadow: 0 8px 25px rgba(13, 110, 253, .5);
}

.result-score {
    font-size: 18px;
    font-weight: 600;
    color: #0d6efd;
}

.btn-telegram {
    background: linear-gradient(135deg, var(--tg-blue), #00c6ff);
    border-radius: 999px;
    font-size: 15px;
    padding: 12px;
}


.btn-telegram:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(0, 136, 204, .45);
}

#test-screen {
    background: rgb(217 216 216 / 85%);
    backdrop-filter: blur(14px);
    border-radius: 22px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, .2);
}

#timer {
    background: linear-gradient(135deg, var(--tg-blue), #00c6ff) !important;
    color: white;
    padding: 6px 12px;
    border-radius: 999px;
    box-shadow: 0 4px 12px rgba(0, 136, 204, .45);
}

/* TEST CARD */
.tg-test-card {
    width: 100%;
    max-width: 620px;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(18px);
    border-radius: 26px;
    box-shadow: 0 40px 80px rgba(0, 0, 0, .25);
    padding: 18px;
    animation: fadeUp .35s ease;
}

/* HEADER */
.tg-test-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(0, 0, 0, .06);
}

/* TITLE */
#test-title {
    font-size: 15px;
    color: #0f172a;
}

/* TIMER */
.tg-timer {
    background: linear-gradient(135deg, #0088cc, #00c6ff);
    color: #fff;
    font-weight: 600;
    font-size: 13px;
    padding: 6px 12px;
    border-radius: 999px;
    box-shadow: 0 6px 16px rgba(0, 136, 204, .45);
}

/* CLOSE */
.tg-close-btn {
    background: rgba(255, 0, 0, .08);
    color: #dc2626;
    border: none;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: .25s;
}

.tg-close-btn:hover {
    background: #dc2626;
    color: #fff;
}

/* QUESTION */
.tg-question {
    margin: 18px 0;
    font-size: 16px;
    font-weight: 600;
    color: #020617;
    line-height: 1.45;
}

/* ANSWERS */
.tg-answers {
    display: grid;
    gap: 12px;
}

/* ANSWER BUTTON */
.tg-answers button {
    background: #fff;
    border: 1px solid rgba(0, 0, 0, .08);
    border-radius: 16px;
    padding: 14px 16px;
    font-size: 14px;
    font-weight: 500;
    text-align: left;
    transition: .25s;
}

.tg-answers button:hover {
    background: rgba(0, 136, 204, .06);
    transform: translateY(-2px);
}

/* CORRECT / WRONG */
.tg-answers .btn-success {
    background: linear-gradient(135deg, #22c55e, #16a34a) !important;
    border: none;
    color: #fff;
}

.tg-answers .btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
    border: none;
    color: #fff;
}

/* ANIMATION */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.quiz-img {
    max-height: 260px;
    object-fit: contain;
    background: #f5f5f5;
    opacity: 0;
    transition: opacity .2s ease;
}

.quiz-img.loaded {
    opacity: 1;
}