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

:root {
    --primary: #6c5ce7;
    --primary-dark: #5a4bd1;
    --primary-light: #a29bfe;
    --success: #00b894;
    --success-dark: #00a381;
    --danger: #e74c3c;
    --danger-dark: #c0392b;
    --warning: #fdcb6e;
    --warning-dark: #f39c12;
    --dark: #2d3436;
    --gray: #636e72;
    --light-gray: #b2bec3;
    --bg: #f8f9fe;
    --card-bg: #ffffff;
    --shadow: 0 10px 40px rgba(108, 92, 231, 0.1);
    --shadow-hover: 0 15px 50px rgba(108, 92, 231, 0.2);
}

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg);
    color: var(--dark);
    min-height: 100vh;
    overflow-x: hidden;
}

.section {
    display: none;
    animation: fadeIn 0.5s ease;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hidden {
    display: none !important;
}

/* ==================== LOGIN SECTION ==================== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: var(--card-bg);
    border-radius: 24px;
    box-shadow: 0 25px 80px rgba(0,0,0,0.15);
    overflow: hidden;
    max-width: 520px;
    width: 100%;
    animation: slideDown 0.6s ease;
}

.login-header {
    background: linear-gradient(135deg, #6c5ce7, #a29bfe);
    padding: 40px 30px;
    text-align: center;
    color: white;
}

.logo-icon {
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    font-size: 36px;
    backdrop-filter: blur(10px);
}

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 5px;
}

.login-header .subtitle {
    font-size: 14px;
    opacity: 0.9;
}

.login-header .for-nancy {
    margin-top: 10px;
    font-size: 13px;
    background: rgba(255,255,255,0.15);
    display: inline-block;
    padding: 5px 20px;
    border-radius: 20px;
}

.login-header .for-nancy span {
    font-weight: 700;
    color: #fdcb6e;
}

.login-body {
    padding: 30px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray);
    margin-bottom: 8px;
}

.input-group label i {
    color: var(--primary);
    margin-right: 5px;
}

.input-group input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e8e8f0;
    border-radius: 12px;
    font-size: 15px;
    font-family: 'Poppins', sans-serif;
    transition: all 0.3s;
    outline: none;
}

.input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.1);
}

.error-msg {
    background: #ffe0e0;
    color: var(--danger);
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 13px;
    margin-bottom: 15px;
    animation: shake 0.4s ease;
}

.exam-rules {
    background: #f0f0ff;
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 25px;
}

.exam-rules h3 {
    font-size: 15px;
    color: var(--primary);
    margin-bottom: 12px;
}

.exam-rules ul {
    list-style: none;
}

.exam-rules li {
    font-size: 13px;
    padding: 6px 0;
    color: var(--gray);
}

.exam-rules li i {
    width: 20px;
    color: var(--primary);
    margin-right: 8px;
}

.btn-primary {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #6c5ce7, #a29bfe);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(108, 92, 231, 0.4);
}

.btn-secondary {
    padding: 12px 24px;
    background: #f0f0ff;
    color: var(--primary);
    border: 2px solid var(--primary-light);
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
}

.btn-danger {
    padding: 15px 30px;
    background: linear-gradient(135deg, #e74c3c, #e67e7e);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

/* ==================== EXAM SECTION ==================== */
.exam-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

.exam-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--card-bg);
    padding: 15px 25px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    position: sticky;
    top: 10px;
    z-index: 100;
}

.student-name-display {
    font-weight: 600;
    color: var(--primary);
    font-size: 14px;
}

.timer-box {
    background: linear-gradient(135deg, #6c5ce7, #a29bfe);
    color: white;
    padding: 10px 25px;
    border-radius: 12px;
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: 2px;
}

.timer-box.danger {
    background: linear-gradient(135deg, #e74c3c, #e67e7e);
    animation: pulse 1s infinite;
}

.warning-counter {
    font-size: 13px;
    font-weight: 600;
    color: var(--warning-dark);
    background: #ffeaa7;
    padding: 8px 16px;
    border-radius: 10px;
}

.warning-counter.danger {
    background: #ffe0e0;
    color: var(--danger);
}

/* Subject Tabs */
.subject-tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.subject-tab {
    flex: 1;
    padding: 14px;
    background: var(--card-bg);
    border: 2px solid #e8e8f0;
    border-radius: 14px;
    font-size: 15px;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--gray);
}

.subject-tab.active {
    background: linear-gradient(135deg, #6c5ce7, #a29bfe);
    color: white;
    border-color: transparent;
    box-shadow: 0 5px 20px rgba(108, 92, 231, 0.3);
}

.tab-progress {
    background: rgba(255,255,255,0.2);
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
}

.subject-tab:not(.active) .tab-progress {
    background: #f0f0ff;
    color: var(--primary);
}

/* Question Area */
.question-area {
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: var(--shadow);
    padding: 30px;
    margin-bottom: 20px;
    min-height: 350px;
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.question-number {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    background: #f0f0ff;
    padding: 6px 16px;
    border-radius: 20px;
}

.question-subject {
    font-size: 13px;
    color: var(--gray);
    font-weight: 500;
}

.question-text {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.6;
    margin-bottom: 25px;
    color: var(--dark);
}

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

.option-btn {
    padding: 16px 20px;
    background: #f8f8ff;
    border: 2px solid #e8e8f0;
    border-radius: 14px;
    font-size: 15px;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 12px;
}

.option-btn:hover {
    border-color: var(--primary-light);
    background: #f0f0ff;
    transform: translateX(5px);
}

.option-btn.selected {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(162, 155, 254, 0.1));
    color: var(--primary);
    font-weight: 600;
}

.option-label {
    width: 32px;
    height: 32px;
    background: var(--primary-light);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.option-btn.selected .option-label {
    background: var(--primary);
}

/* Question Navigation */
.question-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    gap: 10px;
}

.btn-nav {
    padding: 12px 24px;
    background: var(--card-bg);
    border: 2px solid #e8e8f0;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--gray);
}

.btn-nav:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.question-dots {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    max-width: 500px;
}

.q-dot {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid #e8e8f0;
    background: var(--card-bg);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray);
    font-family: 'Poppins', sans-serif;
}

.q-dot.answered {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.q-dot.current {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: scale(1.15);
}

.q-dot:hover {
    transform: scale(1.1);
    border-color: var(--primary);
}

/* Submit Area */
.submit-area {
    text-align: center;
}

.btn-submit {
    padding: 16px 50px;
    background: linear-gradient(135deg, #00b894, #55efc4);
    color: white;
    border: none;
    border-radius: 14px;
    font-size: 17px;
    font-weight: 700;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 184, 148, 0.4);
}

/* ==================== MODALS ==================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 40px;
    max-width: 450px;
    width: 90%;
    text-align: center;
    animation: slideDown 0.4s ease;
}

.modal-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 36px;
}

.modal-icon.warning {
    background: #ffeaa7;
    color: var(--warning-dark);
}

.modal-icon.fail {
    background: #ffe0e0;
    color: var(--danger);
}

.modal-icon.confirm {
    background: #f0f0ff;
    color: var(--primary);
}

.modal-content h2 {
    font-size: 24px;
    margin-bottom: 10px;
}

.modal-content p {
    color: var(--gray);
    font-size: 14px;
    margin-bottom: 10px;
    line-height: 1.6;
}

.warning-count-display {
    font-weight: 700;
    font-size: 18px !important;
    color: var(--danger) !important;
    margin: 15px 0 !important;
}

.modal-content .btn-primary,
.modal-content .btn-danger {
    margin-top: 15px;
}

.modal-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 20px;
}

.unanswered-info {
    background: #fff3cd;
    padding: 12px;
    border-radius: 10px;
    font-size: 13px;
    color: #856404;
    margin-top: 10px;
}

/* ==================== RESULT SECTION ==================== */
.result-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 30px 20px;
}

.result-card {
    background: var(--card-bg);
    border-radius: 24px;
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 30px;
}

.result-header {
    padding: 40px 30px;
    text-align: center;
    color: white;
}

.result-header.pass {
    background: linear-gradient(135deg, #00b894, #55efc4);
}

.result-header.fail {
    background: linear-gradient(135deg, #e74c3c, #e67e7e);
}

.result-icon {
    font-size: 60px;
    margin-bottom: 15px;
}

.result-header h1 {
    font-size: 28px;
    margin-bottom: 5px;
}

.result-header p {
    font-size: 14px;
    opacity: 0.9;
}

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

.stat-card {
    text-align: center;
    padding: 20px 10px;
    background: #f8f8ff;
    border-radius: 16px;
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.stat-icon {
    font-size: 24px;
    color: var(--primary);
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--dark);
}

.stat-label {
    font-size: 12px;
    color: var(--gray);
    margin-top: 4px;
}

.subject-results {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    padding: 0 30px 20px;
}

.subject-result-card {
    background: #f8f8ff;
    padding: 20px;
    border-radius: 14px;
}

.subject-result-card h3 {
    font-size: 15px;
    color: var(--primary);
    margin-bottom: 12px;
}

.progress-bar-container {
    height: 10px;
    background: #e8e8f0;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-bar {
    height: 100%;
    border-radius: 10px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    transition: width 1s ease;
    width: 0%;
}

.subject-result-card p {
    font-size: 13px;
    color: var(--gray);
    font-weight: 500;
}

.time-info {
    padding: 20px 30px;
    border-top: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-around;
}

.time-info p {
    font-size: 13px;
    color: var(--gray);
}

.time-info i {
    color: var(--primary);
    margin-right: 5px;
}

/* ==================== CERTIFICATE ==================== */
.certificate-wrapper {
    margin-bottom: 30px;
    text-align: center;
}

.certificate {
    background: white;
    padding: 8px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.certificate-border {
    border: 3px solid #c9a94e;
    border-radius: 4px;
    padding: 6px;
}

.certificate-inner {
    border: 1px solid #e8d9a0;
    padding: 50px 40px;
    text-align: center;
    background: linear-gradient(135deg, #fffef5, #fff9e6);
    position: relative;
}

.certificate-badge {
    font-size: 60px;
    color: #c9a94e;
    margin-bottom: 15px;
}

.cert-title {
    font-size: 32px;
    font-weight: 800;
    color: #2c3e50;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 10px;
}

.cert-subtitle {
    font-size: 16px;
    color: var(--gray);
    margin-bottom: 8px;
}

.cert-name {
    font-size: 36px;
    color: var(--primary);
    font-weight: 700;
    margin: 10px 0;
    font-style: italic;
    border-bottom: 2px solid var(--primary-light);
    display: inline-block;
    padding-bottom: 5px;
}

.cert-text {
    font-size: 16px;
    color: var(--gray);
    margin: 10px 0 5px;
}

.cert-exam {
    font-size: 20px;
    color: var(--dark);
    margin-bottom: 10px;
}

.cert-score {
    font-size: 16px;
    color: var(--gray);
    margin-bottom: 25px;
}

.cert-details {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin: 25px 0;
    padding-top: 20px;
    border-top: 1px dashed #d4c68a;
}

.cert-label {
    font-size: 12px;
    text-transform: uppercase;
    color: var(--gray);
    letter-spacing: 2px;
}

.cert-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
}

.cert-footer {
    margin-top: 20px;
    font-size: 14px;
    color: #c9a94e;
    font-weight: 600;
    letter-spacing: 2px;
}

/* ==================== REVIEW SECTION ==================== */
.review-section {
    margin-top: 30px;
}

.review-section h2 {
    font-size: 22px;
    color: var(--dark);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.review-card {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 25px;
    margin-bottom: 15px;
    border-left: 4px solid;
}

.review-card.correct {
    border-left-color: var(--success);
}

.review-card.wrong {
    border-left-color: var(--danger);
}

.review-card.skipped {
    border-left-color: var(--light-gray);
}

.review-question {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 10px;
}

.review-q-num {
    background: #f0f0ff;
    color: var(--primary);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 12px;
    margin-right: 8px;
}

.review-answer {
    font-size: 13px;
    padding: 6px 0;
}

.review-answer.your-answer {
    color: var(--danger);
}

.review-answer.correct-answer {
    color: var(--success);
    font-weight: 600;
}

.review-explanation {
    background: #f0f0ff;
    padding: 10px 15px;
    border-radius: 10px;
    font-size: 13px;
    color: var(--gray);
    margin-top: 8px;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .exam-topbar {
        flex-direction: column;
        gap: 10px;
        position: relative;
        top: 0;
    }

    .timer-box {
        font-size: 16px;
        padding: 8px 20px;
    }

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

    .subject-results {
        grid-template-columns: 1fr;
    }

    .subject-tabs {
        flex-direction: column;
        gap: 8px;
    }

    .question-text {
        font-size: 16px;
    }

    .question-nav {
        flex-direction: column;
    }

    .question-dots {
        order: -1;
    }

    .cert-title {
        font-size: 22px;
        letter-spacing: 1px;
    }

    .cert-name {
        font-size: 26px;
    }

    .certificate-inner {
        padding: 30px 20px;
    }

    .cert-details {
        gap: 40px;
    }

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

    .modal-buttons {
        flex-direction: column;
    }
}

/* Print styles for certificate */
@media print {
    body * {
        visibility: hidden;
    }

    .certificate, .certificate * {
        visibility: visible;
    }

    .certificate {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        box-shadow: none;
    }

    .certificate-wrapper .btn-primary {
        display: none;
    }
}