html, body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

a, .btn-link {
    color: #006bb7;
}

.btn-primary {
    color: #fff;
    background-color: #1b6ec2;
    border-color: #1861ac;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

.content {
    padding-top: 1.1rem;
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid #e50000;
}

.validation-message {
    color: #e50000;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNTYiIGhlaWdodD0iNDkiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgeG1sbnM6eGxpbms9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkveGxpbmsiIG92ZXJmbG93PSJoaWRkZW4iPjxkZWZzPjxjbGlwUGF0aCBpZD0iY2xpcDAiPjxyZWN0IHg9IjIzNSIgeT0iNTEiIHdpZHRoPSI1NiIgaGVpZ2h0PSI0OSIvPjwvY2xpcFBhdGg+PC9kZWZzPjxnIGNsaXAtcGF0aD0idXJsKCNjbGlwMCkiIHRyYW5zZm9ybT0idHJhbnNsYXRlKC0yMzUgLTUxKSI+PHBhdGggZD0iTTI2My41MDYgNTFDMjY0LjcxNyA1MSAyNjUuODEzIDUxLjQ4MzcgMjY2LjYwNiA1Mi4yNjU4TDI2Ny4wNTIgNTIuNzk4NyAyNjcuNTM5IDUzLjYyODMgMjkwLjE4NSA5Mi4xODMxIDI5MC41NDUgOTIuNzk1IDI5MC42NTYgOTIuOTk2QzI5MC44NzcgOTMuNTEzIDI5MSA5NC4wODE1IDI5MSA5NC42NzgyIDI5MSA5Ny4wNjUxIDI4OS4wMzggOTkgMjg2LjYxNyA5OUwyNDAuMzgzIDk5QzIzNy45NjMgOTkgMjM2IDk3LjA2NTEgMjM2IDk0LjY3ODIgMjM2IDk0LjM3OTkgMjM2LjAzMSA5NC4wODg2IDIzNi4wODkgOTMuODA3MkwyMzYuMzM4IDkzLjAxNjIgMjM2Ljg1OCA5Mi4xMzE0IDI1OS40NzMgNTMuNjI5NCAyNTkuOTYxIDUyLjc5ODUgMjYwLjQwNyA1Mi4yNjU4QzI2MS4yIDUxLjQ4MzcgMjYyLjI5NiA1MSAyNjMuNTA2IDUxWk0yNjMuNTg2IDY2LjAxODNDMjYwLjczNyA2Ni4wMTgzIDI1OS4zMTMgNjcuMTI0NSAyNTkuMzEzIDY5LjMzNyAyNTkuMzEzIDY5LjYxMDIgMjU5LjMzMiA2OS44NjA4IDI1OS4zNzEgNzAuMDg4N0wyNjEuNzk1IDg0LjAxNjEgMjY1LjM4IDg0LjAxNjEgMjY3LjgyMSA2OS43NDc1QzI2Ny44NiA2OS43MzA5IDI2Ny44NzkgNjkuNTg3NyAyNjcuODc5IDY5LjMxNzkgMjY3Ljg3OSA2Ny4xMTgyIDI2Ni40NDggNjYuMDE4MyAyNjMuNTg2IDY2LjAxODNaTTI2My41NzYgODYuMDU0N0MyNjEuMDQ5IDg2LjA1NDcgMjU5Ljc4NiA4Ny4zMDA1IDI1OS43ODYgODkuNzkyMSAyNTkuNzg2IDkyLjI4MzcgMjYxLjA0OSA5My41Mjk1IDI2My41NzYgOTMuNTI5NSAyNjYuMTE2IDkzLjUyOTUgMjY3LjM4NyA5Mi4yODM3IDI2Ny4zODcgODkuNzkyMSAyNjcuMzg3IDg3LjMwMDUgMjY2LjExNiA4Ni4wNTQ3IDI2My41NzYgODYuMDU0N1oiIGZpbGw9IiNGRkU1MDAiIGZpbGwtcnVsZT0iZXZlbm9kZCIvPjwvZz48L3N2Zz4=) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.darker-border-checkbox.form-check-input {
    border-color: #929292;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}
/* Home */
.home-container {
    max-width: 600px;
    margin: 60px auto;
    text-align: center;
    font-family: sans-serif;
}

.subtitle {
    color: #666;
    margin-bottom: 32px;
}

.topic-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}

.topic-btn {
    padding: 16px 28px;
    font-size: 1rem;
    border: 2px solid #2c7be5;
    border-radius: 8px;
    background: white;
    color: #2c7be5;
    cursor: pointer;
    transition: all 0.2s;
}

    .topic-btn:hover {
        background: #2c7be5;
        color: white;
    }

/* Quiz */
.quiz-container {
    max-width: 680px;
    margin: 40px auto;
    font-family: sans-serif;
}

.progress {
    color: #888;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.question-card {
    background: white;
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
}

.question-text {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.option-btn {
    padding: 14px 20px;
    font-size: 1rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    background: white;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
}

    .option-btn:hover:not(:disabled) {
        border-color: #2c7be5;
        background: #f0f6ff;
    }

    .option-btn.correct {
        background: #d4edda;
        border-color: #28a745;
        color: #155724;
    }

    .option-btn.incorrect {
        background: #f8d7da;
        border-color: #dc3545;
        color: #721c24;
    }

.feedback {
    margin-top: 20px;
    padding: 16px;
    border-radius: 8px;
    font-weight: 600;
}

    .feedback.correct {
        background: #d4edda;
        color: #155724;
    }

    .feedback.incorrect {
        background: #f8d7da;
        color: #721c24;
    }

.explanation {
    font-weight: normal;
    margin-top: 8px;
    font-size: 0.95rem;
}

.nav-btn {
    margin-top: 20px;
    padding: 12px 28px;
    font-size: 1rem;
    background: #2c7be5;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

    .nav-btn:hover {
        background: #1a5fb4;
    }

/* Results */
.results-container {
    max-width: 680px;
    margin: 40px auto;
    font-family: sans-serif;
}

.score {
    font-size: 1.3rem;
    margin-bottom: 32px;
}

.review-card {
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 16px;
}

    .review-card.correct {
        background: #d4edda;
        border-left: 4px solid #28a745;
    }

    .review-card.incorrect {
        background: #f8d7da;
        border-left: 4px solid #dc3545;
    }
/* Language selector */
.lang-selector {
    text-align: right;
    padding: 12px 0;
}

.lang-btn {
    padding: 6px 16px;
    margin-left: 8px;
    border: 2px solid #2c7be5;
    border-radius: 20px;
    background: white;
    color: #2c7be5;
    cursor: pointer;
}

    .lang-btn.active {
        background: #2c7be5;
        color: white;
    }

/* Teacher login */
.teacher-login {
    max-width: 360px;
    margin: 100px auto;
    text-align: center;
    font-family: sans-serif;
}

    .teacher-login input {
        width: 100%;
        padding: 12px;
        font-size: 1rem;
        border: 2px solid #ddd;
        border-radius: 8px;
        margin: 16px 0;
    }

.error-msg {
    color: #dc3545;
    margin-top: 8px;
}

/* Teacher portal */
.teacher-container {
    max-width: 800px;
    margin: 40px auto;
    font-family: sans-serif;
}

    .teacher-container label {
        display: block;
        font-weight: 600;
        margin: 12px 0 4px;
    }

    .teacher-container textarea {
        width: 100%;
        padding: 10px;
        border: 2px solid #ddd;
        border-radius: 8px;
        font-size: 0.95rem;
        min-height: 60px;
        resize: vertical;
    }

    .teacher-container select, .teacher-container input[type=number] {
        padding: 10px;
        border: 2px solid #ddd;
        border-radius: 8px;
        font-size: 0.95rem;
    }

.teacher-actions {
    margin-top: 20px;
    display: flex;
    gap: 12px;
}

.cancel-btn {
    padding: 12px 28px;
    font-size: 1rem;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

.question-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    margin-bottom: 10px;
}

.question-row-text {
    flex: 1;
    margin-right: 16px;
}

.question-row-actions {
    display: flex;
    gap: 8px;
}

.topic-tag {
    background: #e8f0fe;
    color: #2c7be5;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    margin-right: 10px;
}

.edit-btn {
    padding: 6px 14px;
    background: #ffc107;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.delete-btn {
    padding: 6px 14px;
    background: #dc3545;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}
/* Teacher portal sections */
.teacher-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 8px;
}

.question-count {
    background: #e8f0fe;
    color: #2c7be5;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.9rem;
}

.teacher-toolbar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.logout-btn {
    padding: 12px 20px;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

    .logout-btn:hover {
        background: #495057;
    }

.lang-section {
    border-radius: 10px;
    padding: 20px;
    margin: 16px 0;
}

.fi-section {
    background: #f0f7ff;
    border-left: 4px solid #003580;
}

.sv-section {
    background: #fff8f0;
    border-left: 4px solid #006AA7;
}

.en-section {
    background: #f5f5f5;
    border-left: 4px solid #aaa;
}

.lang-section h3 {
    margin-top: 0;
    margin-bottom: 12px;
}

.correct-answer-section {
    background: #f0fff4;
    border-left: 4px solid #28a745;
    border-radius: 10px;
    padding: 20px;
    margin: 16px 0;
}

.hint {
    font-size: 0.85rem;
    color: #666;
    margin-top: 6px;
}

.topic-section {
    margin-bottom: 28px;
}

.topic-heading {
    font-size: 1rem;
    color: #2c7be5;
    border-bottom: 2px solid #e8f0fe;
    padding-bottom: 6px;
    margin-bottom: 10px;
}

.topic-count {
    font-weight: normal;
    color: #888;
    font-size: 0.9rem;
}

.empty-state {
    text-align: center;
    padding: 48px;
    color: #888;
    background: #f9f9f9;
    border-radius: 12px;
    margin-top: 24px;
}

/* Delete confirmation modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal {
    background: white;
    border-radius: 12px;
    padding: 32px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

    .modal p {
        margin-bottom: 20px;
        font-size: 1rem;
    }

.modal-actions {
    display: flex;
    gap: 12px;
}
.teacher-nav-link .nav-link {
    opacity: 0.5;
    font-size: 0.85rem;
}

    .teacher-nav-link .nav-link:hover {
        opacity: 1;
    }
/* Stats */
.stats-container {
    margin-top: 16px;
}

.stat-card {
    background: white;
    border: 1px solid #ddd;
    border-radius: 10px;
    padding: 16px;
    margin-bottom: 12px;
}

.stat-question {
    font-weight: 600;
    margin-bottom: 10px;
}

.stat-row {
    display: flex;
    gap: 24px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.stat-label {
    font-size: 0.9rem;
    color: #444;
}

.stat-bar-bg {
    background: #eee;
    border-radius: 20px;
    height: 12px;
    overflow: hidden;
}

.stat-bar-fill {
    height: 12px;
    border-radius: 20px;
    transition: width 0.4s ease;
}

.active-tab {
    background: #1a5fb4 !important;
}
/* Grade badge */
.grade-badge {
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    border: 3px solid;
    border-radius: 16px;
    padding: 16px 32px;
    margin: 16px auto 28px;
    display: inline-block;
}
/* All button */
.all-topic-container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.all-btn {
    background: white !important;
    color: #2c7be5 !important;
    border-color: #2c7be5 !important;
    min-width: 200px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

    .all-btn:hover {
        background: #2c7be5 !important;
        color: white !important;
    }
/* Stats filters */
.stats-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: flex-end;
    margin-bottom: 20px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

    .filter-group label {
        font-size: 0.85rem;
        font-weight: 600;
        color: #555;
    }

    .filter-group input[type=date] {
        padding: 8px 12px;
        border: 2px solid #ddd;
        border-radius: 8px;
        font-size: 0.95rem;
    }

    .filter-group select {
        padding: 8px 12px;
        border: 2px solid #ddd;
        border-radius: 8px;
        font-size: 0.95rem;
    }

.export-btn {
    padding: 12px 20px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    font-size: 1rem;
    display: inline-block;
}

    .export-btn:hover {
        background: #1e7e34;
        color: white;
    }
/* Category selection */
.category-select-container {
    max-width: 620px;
    margin: 60px auto;
    font-family: sans-serif;
    text-align: center;
}

.category-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 24px 0;
}

.category-btn {
    padding: 16px 20px;
    font-size: 1rem;
    border: 2px solid #ddd;
    border-radius: 10px;
    background: white;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
    color: #333;
}

    .category-btn:hover {
        border-color: #2c7be5;
        background: #f0f6ff;
    }

    .category-btn.selected {
        border-color: #2c7be5;
        background: #2c7be5;
        color: white;
        font-weight: 600;
    }

.start-btn {
    margin-top: 8px;
    width: 100%;
    font-size: 1.1rem;
    padding: 16px;
}

.back-btn {
    margin-top: 12px;
    width: 100%;
}