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

:root {
    /* Light mode colors (default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e8e8e8;
    --text-primary: #000000;
    --text-secondary: #333333;
    --text-tertiary: #666666;
    --border-color: #d0d0d0;
    --shadow: rgba(0, 0, 0, 0.1);
    --card-bg: #ffffff;
    --input-bg: #ffffff;
    --hover-bg: #f0f0f0;
    --accent-color: #FF3333;
}

[data-theme="dark"] {
    /* Dark mode colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-tertiary: #999999;
    --border-color: #2a2a2a;
    --shadow: rgba(0, 0, 0, 0.4);
    --card-bg: #1a1a1a;
    --input-bg: #0a0a0a;
    --hover-bg: #0a0a0a;
    --accent-color: #FF3333;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 60px 20px;
}

.header {
    text-align: center;
    margin-bottom: 50px;
}

.logo {
    max-width: 180px;
    height: auto;
    margin-bottom: 30px;
    filter: drop-shadow(0 4px 12px rgba(255, 51, 51, 0.2));
}

.header h1 {
    font-size: 2.8rem;
    margin-bottom: 12px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-tertiary);
    font-weight: 400;
}

/* Theme Toggle */
.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    padding: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    border-color: var(--accent-color);
    transform: scale(1.05);
}

.theme-toggle-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.search-section {
    background: var(--card-bg);
    padding: 35px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 30px;
    box-shadow: 0 4px 24px var(--shadow);
    transition: all 0.3s ease;
}

.search-box {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

#searchInput {
    flex: 1;
    padding: 16px 20px;
    font-size: 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
    outline: none;
    background: var(--input-bg);
    color: var(--text-primary);
}

#searchInput::placeholder {
    color: var(--text-tertiary);
}

#searchInput:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 51, 51, 0.15);
}

#searchBtn {
    padding: 16px 40px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#searchBtn:hover {
    background: #ff4444;
    box-shadow: 0 4px 20px rgba(255, 51, 51, 0.4);
}

#searchBtn:active {
    background: #cc0000;
    transform: scale(0.98);
}

.help-text {
    font-size: 13px;
    color: var(--text-tertiary);
    text-align: center;
    margin-top: 4px;
}

.initial-message {
    background: var(--card-bg);
    padding: 50px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 24px var(--shadow);
    transition: all 0.3s ease;
}

.initial-message p {
    color: var(--text-tertiary);
    font-size: 1.05rem;
    line-height: 1.6;
}

.results-section {
    background: var(--card-bg);
    padding: 35px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 24px var(--shadow);
    transition: all 0.3s ease;
}

.status-message {
    margin-bottom: 24px;
    padding: 14px 18px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 15px;
}

.status-message.success {
    background: rgba(76, 175, 80, 0.15);
    color: #4caf50;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.status-message.warning {
    background: rgba(255, 152, 0, 0.15);
    color: #ff9800;
    border: 1px solid rgba(255, 152, 0, 0.3);
}

.status-message.error {
    background: rgba(244, 67, 54, 0.15);
    color: #f44336;
    border: 1px solid rgba(244, 67, 54, 0.3);
}

.status-message.info {
    background: rgba(33, 150, 243, 0.15);
    color: #2196f3;
    border: 1px solid rgba(33, 150, 243, 0.3);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    overflow: hidden;
    border-radius: 8px;
}

thead {
    background: var(--bg-secondary);
}

th {
    padding: 16px 18px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--accent-color);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: 16px 18px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 15px;
}

tbody tr {
    transition: background 0.2s ease;
}

tbody tr:hover {
    background: var(--hover-bg);
}

tbody tr:last-child td {
    border-bottom: none;
}

/* Form Styles */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: 0.3px;
}

.form-group input,
.form-group select {
    padding: 14px 16px;
    font-size: 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
    outline: none;
    background: var(--input-bg);
    color: var(--text-primary);
    font-family: inherit;
}

.form-group input::placeholder {
    color: var(--text-tertiary);
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 51, 51, 0.15);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

[data-theme="dark"] .form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ffffff' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
}

[data-theme="light"] .form-group select,
:root .form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23000000' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
}

.form-group select option {
    background: var(--card-bg);
    color: var(--text-primary);
}

/* Summary Cards */
.summary-card {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.3s ease;
}

.summary-label {
    font-size: 13px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    font-weight: 600;
}

.summary-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Chart Container */
.chart-container {
    margin: 20px 0;
}

.chart-container img {
    display: block;
    margin: 0 auto;
}

/* Table Value Colors */
.positive-value {
    color: #4caf50 !important;
    font-weight: 600;
}

.negative-value {
    color: #f44336 !important;
    font-weight: 600;
}

/* Results Section Headings */
.results-section h2 {
    color: var(--text-primary);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 10px;
}

/* Toggle Switch Styles */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: 0.3s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

@media (max-width: 768px) {
    .container {
        padding: 40px 15px;
    }

    .header h1 {
        font-size: 2.2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .logo {
        max-width: 140px;
    }
    
    .search-box {
        flex-direction: column;
    }
    
    #searchBtn {
        width: 100%;
        padding: 14px 32px;
    }
    
    .search-section, .results-section, .initial-message {
        padding: 25px;
    }
    
    table {
        font-size: 13px;
        display: block;
        overflow-x: auto;
    }
    
    th, td {
        padding: 12px 10px;
    }

    .form-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .summary-card {
        padding: 16px;
    }

    .summary-value {
        font-size: 1.5rem;
    }
}