/* General Styles */
:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent: #4CAF50;
    --accent-hover: #45a049;
    --error: #ff4444;
    --success: #00C851;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-primary);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    color: var(--text-primary);
}

.app-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 2rem;
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

h2 {
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

/* Container Styles */
.container {
    background-color: var(--bg-primary);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.file-input-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    border: 2px dashed #444;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 200px;
    justify-content: center;
}

.file-input-label:hover {
    border-color: var(--accent);
}

.file-icon {
    font-size: 3rem;
    color: var(--accent);
}

#fileInput {
    display: none;
}

.data-point {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.data-input {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid #444;
    border-radius: 6px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.data-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.2);
}

.remove-point {
    background: var(--error);
    color: white;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.remove-point:hover {
    background: #ff1a1a;
    transform: scale(1.1);
}

/* Button Styles */
.add-button {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    width: 100%;
    justify-content: center;
}

.add-button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.process-button {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1rem;
    width: 100%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.process-button:hover:not(:disabled) {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.process-button:disabled {
    background-color: #666;
    cursor: not-allowed;
}

/* Add loading spinner */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-spinner {
    display: none;
    animation: spin 1s linear infinite;
}

.processing .loading-spinner {
    display: inline-block;
}

/* Status messages */
.status {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 6px;
    display: none;
}

.status.error {
    background-color: rgba(255, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid var(--error);
}

.status.success {
    background-color: rgba(0, 200, 81, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

#fileNameDisplay {
    transition: all 0.3s ease;
    word-break: break-word;
    max-width: 100%;
    text-align: center;
}