:root {
    --primary-color: #d76d77;
    /* Pink/Red accent */
    --secondary-color: #a0aec0;
    --background-color: #1a0b2e;
    /* Deep purple background */
    --card-bg: rgba(255, 255, 255, 0.05);
    /* Dark glass */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
    --text-color: #ffffff;
    --accent-color: #ffaf7b;
    /* Orange/Gold accent */
    --navbar-bg: rgba(26, 11, 46, 0.95);
}

body {
    background: linear-gradient(135deg, #3a1c71 0%, #d76d77 100%, #ffaf7b 100%);
    /* Abstract gradient */
    background-size: cover;
    background-attachment: fixed;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Glassmorphism Utilities */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: var(--glass-border);
    border-radius: 15px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    color: #fff;
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Navbar */
.navbar {
    background: var(--navbar-bg) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
    font-weight: 700;
    color: #fff !important;
    font-size: 1.5rem;
}

.navbar-light .navbar-brand {
    color: #fff;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(45deg, #d76d77, #ffaf7b);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    transition: all 0.3s ease;
    color: #fff;
    font-weight: 600;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #ffaf7b, #d76d77);
    transform: scale(1.02);
    box-shadow: 0 0 15px rgba(215, 109, 119, 0.5);
}

.btn-outline-danger {
    color: #ff6b6b;
    border-color: #ff6b6b;
}

.btn-outline-danger:hover {
    background-color: #ff6b6b;
    color: #fff;
}

/* Exam Interface */
.question-panel {
    min-height: 300px;
    padding: 20px;
}

.option-card {
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 10px;
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

.option-card:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-color);
}

.option-card.selected {
    background: linear-gradient(45deg, rgba(215, 109, 119, 0.2), rgba(255, 175, 123, 0.2));
    border-color: var(--accent-color);
    color: #fff;
    font-weight: 600;
}

.timer-box {
    font-size: 1.5rem;
    font-weight: bold;
    color: #ff6b6b;
    background: rgba(0, 0, 0, 0.3);
    padding: 10px 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 8px;
    max-height: 300px;
    overflow-y: auto;
    padding: 10px;
}

.nav-btn {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s;
    color: #fff;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.nav-btn.active {
    background-color: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

.nav-btn.answered {
    background-color: #00b09b;
    /* Green gradient start */
    background-image: linear-gradient(to right, #00b09b, #96c93d);
    color: #fff;
    border: none;
}

.nav-btn.current {
    border: 2px solid var(--accent-color);
    box-shadow: 0 0 10px var(--accent-color);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.animate-fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

/* Footer */
footer {
    margin-top: auto;
    background: rgba(0, 0, 0, 0.2);
    padding: 20px 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Text Colors Overrides for Bootstrap */
.text-muted {
    color: rgba(255, 255, 255, 0.6) !important;
}

.text-primary {
    color: #ffaf7b !important;
    /* Gold for primary text */
}

.form-control,
.form-select {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
}

.form-control:focus,
.form-select:focus {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 0 0 0.25rem rgba(255, 175, 123, 0.25);
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

/* Sidebar overrides */
.sidebar {
    background: rgba(0, 0, 0, 0.2) !important;
    border-left: 1px solid rgba(255, 255, 255, 0.1) !important;
}

.bg-light {
    background-color: transparent !important;
}

.bg-white {
    background-color: transparent !important;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .question-panel {
        padding: 15px;
    }

    .timer-box {
        font-size: 1.2rem;
        padding: 5px 10px;
    }
}