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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #F5F5F5;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
}

.container {
    background: white;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    max-width: 700px;
    width: 100%;
    animation: slideIn 0.4s ease;
    max-height: 95vh;
    overflow-y: auto;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .container {
        padding: 15px;
        border-radius: 12px;
        margin: 5px;
    }
}

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

h1 {
    color: #3D3D3D;
    font-size: 28px;
    margin-bottom: 8px;
    text-align: center;
    font-weight: 800;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 24px;
    }
}

h3 {
    text-align: center;
    color: #3D3D3D;
}

p {
    color: #6B7280;
    text-align: center;
    margin-bottom: 30px;
    font-size: 16px;
}

.subtitle {
    color: #9CA3AF;
    font-size: 15px;
    text-align: center;
    margin-bottom: 25px;
    line-height: 1.6;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    p {
        font-size: 18px;
    }
    
    .subtitle {
        font-size: 16px;
    }
}

/* Form Inputs */
input[type="text"], input[type="password"] {
    width: 100%;
    padding: 14px 18px;
    font-size: 16px;
    border: none;
    background: #F5F5F5;
    border-radius: 10px;
    transition: all 0.2s;
    outline: none;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    input[type="text"], input[type="password"] {
        padding: 16px 20px;
        font-size: 18px;
    }
}

input:focus {
    background: #EBEBEB;
    box-shadow: 0 0 0 2px #E5E5E5;
}

/* Buttons - Consolidated styles */
button, .btn, .nav-btn, .submit-btn {
    padding: 14px 28px;
    font-size: 16px;
    background: #3D3D3D;
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    button, .btn, .nav-btn, .submit-btn {
        padding: 16px 32px;
        font-size: 18px;
    }
}

button:hover, .btn:hover, .nav-btn:hover, .submit-btn:hover {
    background: #1A1A1A;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

button:active, .btn:active {
    transform: translateY(0);
}

button:disabled {
    background: #E5E5E5;
    color: #999;
    cursor: not-allowed;
    transform: none;
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
}

/* Secondary Buttons - Consolidated */
.logout-btn, .reset-btn {
    background: #6B7280;
    padding: 8px 16px;
    font-size: 13px;
    margin-top: 15px;
}

.logout-btn:hover, .reset-btn:hover {
    background: #4B5563;
    box-shadow: 0 4px 12px rgba(107, 114, 128, 0.3);
}

/* Submit Button */
.submit-btn {
    width: 100%;
    padding: 16px;
    font-size: 16px;
    margin-top: 10px;
}

/* Auth Form */
.auth-form input {
    width: 100%;
    margin-bottom: 15px;
}

.auth-form button {
    width: 100%;
}

.switch-link {
    color: #3D3D3D;
    text-decoration: none;
    cursor: pointer;
    font-weight: 600;
    margin-top: 15px;
    display: inline-block;
    transition: color 0.2s;
}

.switch-link:hover {
    color: #1A1A1A;
    text-decoration: underline;
}

/* Question Blocks */
.question-block {
    background: #FAFAFA;
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 20px;
    border: none;
    display: none;
    min-height: 400px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .question-block {
        padding: 20px;
        min-height: 350px;
    }
}

.question-block.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.question-block h4 {
    color: #3D3D3D;
    margin-bottom: 25px;
    font-weight: 700;
    font-size: 20px;
    line-height: 1.6;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .question-block h4 {
        font-size: 22px;
    }
}

.question-number {
    display: inline-block;
    background: #3D3D3D;
    color: #fff;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    text-align: center;
    line-height: 32px;
    margin-right: 12px;
    font-size: 16px;
}

/* Options */
.option {
    display: block;
    padding: 18px 22px;
    margin-bottom: 14px;
    background: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 16px;
    color: #3D3D3D;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .option {
        padding: 20px 24px;
        margin-bottom: 16px;
        font-size: 18px;
    }
}

.option:hover {
    background: #F5F5F5;
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.option input[type="radio"] {
    margin-right: 14px;
    cursor: pointer;
    width: 20px;
    height: 20px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .option input[type="radio"] {
        width: 22px;
        height: 22px;
        margin-right: 16px;
    }
}

.option input[type="radio"]:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.option:has(input[type="radio"]:disabled) {
    opacity: 0.4;
    cursor: not-allowed;
}

.option:has(input[type="radio"]:disabled):hover {
    background: white;
    transform: none;
}

/* Question Counter & Progress */
.question-counter {
    text-align: center;
    color: #999;
    font-size: 16px;
    margin-bottom: 15px;
    font-weight: 600;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .question-counter {
        font-size: 18px;
    }
}

.progress-bar {
    background: #F5F5F5;
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 20px;
}

.progress-fill {
    background: #3D3D3D;
    height: 100%;
    transition: width 0.3s;
}

/* Navigation */
.nav-buttons {
    display: flex;
    gap: 12px;
    justify-content: flex-start;
    margin-top: 20px;
}

.buttons-row {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

/* Results */
.result-card {
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 20px;
    border: none;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.result-card.rank-1 {
    background: #FFFACD;
}

.result-card.rank-2 {
    background: #B4C7E7;
}

.result-card.rank-3 {
    background: #90EE90;
}

.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}

.result-rank {
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    background: #3D3D3D;
}

.result-title {
    flex: 1;
    margin-left: 15px;
}

.result-title h3 {
    font-size: 22px;
    margin-bottom: 5px;
    color: #3D3D3D;
}

.result-percentage {
    font-size: 24px;
    font-weight: 800;
    color: #3D3D3D;
}

.result-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 12px;
    font-size: 14px;
}

.result-details {
    background: rgba(255, 255, 255, 0.6);
    border: none;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
}

.result-details h5 {
    color: #3D3D3D;
    font-size: 13px;
    margin-bottom: 8px;
    font-weight: 700;
}

.result-details p {
    color: #666;
    font-size: 13px;
    margin-bottom: 10px;
    text-align: left;
}

/* Icons & Messages */
.icon {
    font-size: 24px;
    margin-right: 8px;
}

.success-msg {
    color: #3D3D3D;
    font-weight: 600;
}

.error-msg {
    color: #666;
    font-weight: 600;
    text-align: center;
    padding: 10px;
}

/* Chat Interface */
.chat-toggle-btn {
    background: rgba(255, 255, 255, 0.8);
    color: #3D3D3D;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    margin-top: 15px;
    width: 100%;
    transition: background 0.2s, color 0.2s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.chat-toggle-btn:hover {
    background: #3D3D3D;
    color: #fff;
}

.chat-window {
    display: none;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 10px;
    margin-top: 15px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.chat-window.open {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; max-height: 0; }
    to { opacity: 1; max-height: 500px; }
}

.chat-messages {
    height: 250px;
    overflow-y: auto;
    padding: 15px;
    background: transparent;
}

.chat-message {
    margin-bottom: 12px;
    padding: 10px 14px;
    border-radius: 8px;
    max-width: 85%;
    line-height: 1.5;
    font-size: 14px;
}

.chat-message.user {
    background: #3D3D3D;
    color: #fff;
    margin-left: auto;
    text-align: right;
}

.chat-message.bot {
    background: white;
    color: #3D3D3D;
    border: none;
    text-align: left;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.chat-message.bot ul {
    margin: 8px 0 0 0;
    padding-left: 20px;
}

.chat-message.bot li {
    margin-bottom: 6px;
    line-height: 1.6;
}

.chat-input-area {
    display: flex;
    gap: 8px;
    padding: 12px;
    background: transparent;
    border-top: none;
}

.chat-input {
    flex: 1;
    padding: 10px 14px;
    border: none;
    background: white;
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    color: #3D3D3D;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.chat-input:focus {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.chat-send-btn {
    padding: 10px 20px;
    background: #3D3D3D;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    transition: background 0.2s;
}

.chat-send-btn:hover {
    background: #1A1A1A;
    color: #fff;
}

.chat-send-btn:disabled {
    background: #F5F5F5;
    color: #999;
    cursor: not-allowed;
}

.chat-typing {
    color: #999;
    font-style: italic;
    font-size: 13px;
    padding: 10px 14px;
}

/* Navigation Header */
.nav-header {
    padding: 0 0 20px 0;
    margin-bottom: 20px;
    border-bottom: 1px solid #e9ecef;
}

.back-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.back-link:hover {
    color: #5a6fd8;
    transform: translateX(-3px);
}

/* Results description max-width */
.subtitle {
    max-width: 500px;
    margin: 0 auto;
}

.results-spacing {
    margin-top: 40px;
}