/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #b8b8b8;
    --neon-blue: #00d4ff;
    --neon-purple: #8b5cf6;
    --neon-green: #00ff88;
    --neon-pink: #ff0080;
    --neon-orange: #ff6b35;
    --border-color: #2a2a3e;
    --shadow-neon: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.5);
}

body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    margin: 0;
    padding: 0;
}

/* Background Effects */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.floating-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, var(--neon-blue), transparent),
        radial-gradient(2px 2px at 40px 70px, var(--neon-purple), transparent),
        radial-gradient(1px 1px at 90px 40px, var(--neon-green), transparent),
        radial-gradient(1px 1px at 130px 80px, var(--neon-pink), transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: float 20s linear infinite;
}

.grid-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
}

@keyframes float {
    0% { transform: translateY(0px); }
    100% { transform: translateY(-100px); }
}

/* Container and Layout */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    padding-bottom: 80px;
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
    border-bottom: 2px solid var(--border-color);
    position: relative;
}

.header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--neon-blue), transparent);
    box-shadow: var(--shadow-neon);
}

.logo h1 {
    font-family: 'Orbitron', monospace;
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 10px;
    background: linear-gradient(45deg, var(--text-primary), var(--neon-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.neon-text {
    color: var(--neon-blue);
    text-shadow: var(--shadow-neon);
    -webkit-text-fill-color: var(--neon-blue);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 300;
    letter-spacing: 2px;
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

/* Form Styles */
.form-container {
    background: rgba(26, 26, 46, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.form-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple), var(--neon-green));
    box-shadow: var(--shadow-glow);
}

.section-title {
    font-family: 'Orbitron', monospace;
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: var(--neon-blue);
    text-shadow: var(--shadow-neon);
}

.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-select,
.form-input,
.form-textarea {
    width: 100%;
    padding: 12px 15px;
    background: rgba(10, 10, 15, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.form-select:focus,
.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--neon-blue);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
    transform: translateY(-2px);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
    font-family: 'Roboto', monospace;
}

.data-format-help {
    margin-top: 10px;
    padding: 15px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 8px;
    border-left: 3px solid var(--neon-blue);
}

.data-format-help p {
    margin-bottom: 5px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.data-format-help p:last-child {
    margin-bottom: 0;
}

/* Submit Button */
.submit-btn {
    width: 100%;
    padding: 15px 30px;
    background: linear-gradient(45deg, var(--neon-blue), var(--neon-purple));
    border: none;
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-neon);
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.submit-btn:active {
    transform: translateY(-1px);
}

.btn-glow {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.submit-btn:hover .btn-glow {
    left: 100%;
}

/* Preview Container */
.preview-container {
    background: rgba(26, 26, 46, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.preview-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-green), var(--neon-pink), var(--neon-orange));
    box-shadow: var(--shadow-glow);
}

.chart-preview {
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    background: rgba(10, 10, 15, 0.5);
}

.placeholder {
    text-align: center;
    color: var(--text-secondary);
}

.placeholder-icon {
    font-size: 4rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

.generated-chart {
    text-align: center;
}

.chart-image {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    margin-bottom: 20px;
}

.chart-controls {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.control-btn {
    padding: 10px 20px;
    background: rgba(0, 212, 255, 0.2);
    border: 1px solid var(--neon-blue);
    border-radius: 6px;
    color: var(--neon-blue);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.control-btn:hover {
    background: var(--neon-blue);
    color: var(--bg-primary);
    box-shadow: var(--shadow-neon);
}

/* Curve Info Panel */
.curve-info-panel {
    background: rgba(26, 26, 46, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.curve-info-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-purple), var(--neon-green));
    box-shadow: var(--shadow-glow);
}

.curve-info-panel h3 {
    font-family: 'Orbitron', monospace;
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--neon-purple);
    text-shadow: var(--shadow-neon);
}

.curve-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .logo h1 {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .logo h1 {
        font-size: 2.2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .form-container,
    .preview-container,
    .curve-info-panel {
        padding: 20px;
    }
    
    .chart-controls {
        flex-direction: column;
        align-items: center;
    }
    
    .control-btn {
        width: 100%;
        max-width: 200px;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .form-select,
    .form-input,
    .form-textarea {
        padding: 10px 12px;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--neon-blue);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Success/Error Messages */
.message {
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    font-weight: 500;
}

.message.success {
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--neon-green);
    color: var(--neon-green);
}

.message.error {
    background: rgba(255, 0, 128, 0.1);
    border: 1px solid var(--neon-pink);
    color: var(--neon-pink);
}

/* Footer Styles */
.footer {
    background: rgba(26, 26, 46, 0.9);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    z-index: 9999 !important;
    transform: none !important;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple), var(--neon-green));
    box-shadow: var(--shadow-glow);
}

.footer-content {
    text-align: center;
    color: var(--text-secondary);
}

.footer-content p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--neon-blue);
    font-weight: 600;
}

/* Force footer to stay fixed */
html, body {
    height: 100%;
}

.footer {
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100vw !important;
    z-index: 9999 !important;
    transform: none !important;
    will-change: auto !important;
}