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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

.screen {
    display: none;
    padding: 30px;
    min-height: 500px;
}

.screen.active {
    display: block;
}

/* Welcome Screen */
.welcome-content {
    text-align: center;
    padding: 40px 20px;
}

.welcome-content h2 {
    color: #333;
    margin-bottom: 20px;
}

.welcome-content p {
    color: #666;
    margin-bottom: 15px;
    line-height: 1.6;
}

/* Interview Screen */
.interview-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #eee;
}

.info-badge {
    background: #f0f0f0;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9em;
    color: #666;
}

.chat-container {
    height: 500px;
    overflow-y: auto;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 8px;
    margin-bottom: 20px;
}

.message {
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-header {
    font-weight: bold;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
}

.message.interviewer .message-header {
    color: #667eea;
}

.message.user .message-header {
    color: #48bb78;
}

.message-content {
    background: white;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #667eea;
    line-height: 1.6;
    white-space: pre-wrap;
}

.message.user .message-content {
    border-left-color: #48bb78;
    background: #e6fffa;
}

.message.system .message-content {
    background: #fff5e6;
    border-left-color: #f6ad55;
    font-style: italic;
    color: #744210;
}

.input-container {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
}

textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
    font-family: inherit;
    resize: vertical;
    margin-bottom: 15px;
    transition: border-color 0.3s;
}

textarea:focus {
    outline: none;
    border-color: #667eea;
}

.button-group {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 12px 30px;
    font-size: 1em;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    flex: 1;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: #e2e8f0;
    color: #4a5568;
}

.btn-secondary:hover {
    background: #cbd5e0;
}

/* Complete Screen */
.complete-content {
    text-align: center;
    padding: 40px 20px;
}

.complete-content h2 {
    color: #667eea;
    margin-bottom: 20px;
}

.form-group {
    margin: 30px 0;
    text-align: left;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
}

.transcript-info {
    margin-top: 30px;
    padding: 20px;
    background: #f0fff4;
    border-radius: 8px;
    text-align: left;
}

.transcript-info p {
    margin-bottom: 10px;
    color: #2d3748;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.error {
    background: #fed7d7;
    color: #c53030;
    padding: 15px;
    border-radius: 8px;
    margin-top: 20px;
}

/* Loading indicator */
.typing-indicator {
    display: inline-block;
    padding: 10px 15px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.typing-indicator span {
    height: 8px;
    width: 8px;
    margin: 0 2px;
    background-color: #667eea;
    border-radius: 50%;
    display: inline-block;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.7;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}