:root {
    --primary-color: #0d47a1;
    --secondary-color: #1565c0;
    --accent-color: #42a5f5;
    --background-color: #f4f6f8;
    --surface-color: #ffffff;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #e0e0e0;
    --patient-bubble: #e3f2fd;
    --student-bubble: #eeeeee;
    --error-color: #d32f2f;
}

* {
    box-sizing: border-box; /* Ensure padding and borders are included in element sizes */
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

#app-container {
    display: flex;
    width: 95%;
    height: 95%;
    max-width: 1400px;
    max-height: 900px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    border-radius: 10px;
    overflow: hidden;
    background-color: var(--surface-color);
}

.left-panel {
    width: 350px;
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    padding: 15px; /* Reduced padding for mobile */
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
}

.panel-section {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px; /* Reduced padding */
    margin-bottom: 15px; /* Reduced margin */
}

.panel-section h3 {
    margin-top: 0;
    color: var(--secondary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    margin-bottom: 8px;
    font-size: 1em; /* Slightly smaller font */
}

.panel-section p, .panel-section li {
    margin: 5px 0;
    font-size: 0.85em; /* Smaller font for mobile readability */
}

.vital-signs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

#exam-list {
    list-style: none;
    padding: 0;
}

.right-panel {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    background-color: #e8eaf6;
}

.top-bar {
    background-color: var(--surface-color);
    padding: 10px 15px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.top-bar .case-name {
    font-size: 1em;
    font-weight: 500;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.3em;
    color: #e57373;
    cursor: pointer;
    padding: 0;
    line-height: 1.1;
    transition: color 0.2s ease;
}

.close-btn:hover {
    color: var(--error-color);
}

#evaluate-btn {
    background-color: #4caf50;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s;
}

#evaluate-btn:hover {
    background-color: #43a047;
}

#evaluate-btn:disabled {
    background-color: #9e9e9e;
    cursor: not-allowed;
}

.chat-window {
    flex-grow: 1;
    padding: 15px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.message {
    max-width: 75%;
    padding: 8px 12px;
    border-radius: 18px;
    margin-bottom: 8px;
    line-height: 1.4;
    position: relative;
}

.patient-message {
    background-color: var(--patient-bubble);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.student-message {
    background-color: var(--surface-color);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.system-message, .error-message {
    align-self: center;
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.85em;
    padding: 5px 10px;
    background-color: #f5f5f5;
    border-radius: 10px;
    text-align: center;
}

.error-message {
    color: var(--error-color);
    background-color: #ffcdd2;
}

.loading-indicator {
    align-self: flex-start;
}

.loading-indicator span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--secondary-color);
    margin: 0 2px;
    animation: bounce 1.4s infinite ease-in-out both;
}

.loading-indicator span:nth-child(1) { animation-delay: -0.32s; }
.loading-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1.0); }
}

.input-area {
    display: flex;
    padding: 15px;
    border-top: 1px solid var(--border-color);
    background-color: var(--surface-color);
    flex-shrink: 0;
}

#chat-input {
    flex-grow: 1;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 8px 15px;
    font-size: 0.9em;
    outline: none;
}

#chat-input:focus {
    border-color: var(--primary-color);
}

#send-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    margin-left: 8px;
    font-size: 1.4em;
    cursor: pointer;
    transition: background-color 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

#send-btn:hover {
    background-color: var(--secondary-color);
}

#send-btn:disabled {
    background-color: #bdbdbd;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    width: 90%;
    max-width: 600px; /* Reduced max-width for mobile */
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 1.4em;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-content h2 { color: var(--primary-color); }

.evaluation-category { margin-bottom: 15px; }

.evaluation-category h3 {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--secondary-color);
    background-color: var(--background-color);
    padding: 8px;
    border-radius: 5px;
}

.score {
    background-color: var(--accent-color);
    color: white;
    padding: 5px 8px;
    border-radius: 12px;
    font-size: 0.85em;
}

.left-header {
    margin-bottom: 15px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.left-header-container {
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: center;
    width: 100%;
}

.left-header h2 {
    margin: 0;
    font-size: 1.4em;
    color: var(--primary-color);
}

#timer-display {
    font-size: 0.9em;
    font-weight: bold;
    color: var(--primary-color);
    margin-top: 8px;
    text-align: center;
}

.top-bar button {
    padding: 8px 12px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.85em;
    font-weight: bold;
    transition: background-color 0.2s ease;
    margin-left: 8px;
}

#evaluate-btn {
    background-color: #4caf50;
    color: white;
}

#evaluate-btn:hover {
    background-color: #43a047;
}

#help-btn {
    background-color: var(--secondary-color);
    color: white;
}

#help-btn:hover {
    background-color: #1257a0;
}

#help-content h3, #help-content h4 {
    color: var(--primary-color);
    margin-top: 15px;
    margin-bottom: 8px;
}

#help-content ul, #help-content ol {
    margin-left: 20px;
    margin-bottom: 10px;
}

#help-content li {
    margin-bottom: 5px;
}

#help-content p,
#help-content li {
    font-size: 0.8em;
    line-height: 1.5;
    margin-bottom: 8px;
}

#help-content h3 {
    font-size: 1em;
    margin-top: 15px;
    margin-bottom: 8px;
}

#help-content h4 {
    font-size: 0.9em;
    margin-top: 12px;
    margin-bottom: 6px;
}

#help-content ul,
#help-content ol {
    margin-left: 20px;
    margin-bottom: 8px;
}

@media (max-width: 768px) {
    #app-container {
        flex-direction: column;
        width: 100%;
        height: 100vh; /* Use full viewport height */
        max-height: 100vh; /* Ensure it doesn't exceed viewport */
        border-radius: 0;
        overflow: hidden; /* Prevent container overflow */
    }
    .left-panel {
        width: 100%;
        max-height: 35vh; /* Reduced height for better balance */
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        overflow-y: auto;
        padding: 10px; /* Further reduced padding */
    }
    .right-panel {
        height: calc(65vh - 50px); /* Adjusted for top-bar and input-area */
        display: flex;
        flex-direction: column;
        overflow: hidden; /* Prevent right-panel overflow */
    }
    .chat-window {
        flex-grow: 1;
        overflow-y: auto;
        max-height: calc(65vh - 100px); /* Account for top-bar (~50px) and input-area (~50px) */
        padding: 10px;
    }
    .input-area {
        flex-shrink: 0;
        padding: 10px;
    }
    .top-bar {
        padding: 8px 10px;
    }
    #chat-input {
        font-size: 0.85em;
        padding: 8px 12px;
    }
    #send-btn {
        width: 36px;
        height: 36px;
        font-size: 1.2em;
    }
}