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

body {
    font-family: 'Consolas', 'Courier New', monospace;
    background-color: #1a1a1a;
    color: #e0e0e0;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background-color: #2a2a2a;
    border-bottom: 2px solid #3a3a3a;
    padding: 15px 0;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.5em;
    font-weight: bold;
    color: #ffffff;
}

.nav {
    display: flex;
    gap: 20px;
}

.nav a {
    color: #cccccc;
    text-decoration: none;
    transition: color 0.2s;
}

.nav a:hover {
    color: #ffffff;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #ffffff;
    font-size: 2.2em;
    font-weight: normal;
}

/* Tabs */
.tabs {
    display: flex;
    background-color: #2a2a2a;
    border-radius: 6px 6px 0 0;
    border: 1px solid #3a3a3a;
    border-bottom: none;
    overflow-x: auto;
}

.tab {
    padding: 15px 25px;
    cursor: pointer;
    background-color: #2a2a2a;
    border-right: 1px solid #3a3a3a;
    color: #cccccc;
    transition: all 0.2s;
    white-space: nowrap;
    min-width: 120px;
    text-align: center;
}

.tab:last-child {
    border-right: none;
}

.tab:hover {
    background-color: #353535;
}

.tab.active {
    background-color: #3a3a3a;
    color: #ffffff;
    border-bottom: 2px solid #666666;
}

.tab-content {
    display: none;
    background-color: #2a2a2a;
    border: 1px solid #3a3a3a;
    border-radius: 0 0 6px 6px;
    padding: 20px;
}

.tab-content.active {
    display: block;
}

/* Sections */
.section {
    background-color: #252525;
    border-radius: 6px;
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid #3a3a3a;
}

.section h2 {
    color: #cccccc;
    margin-bottom: 15px;
    border-bottom: 1px solid #3a3a3a;
    padding-bottom: 8px;
    font-weight: normal;
    font-size: 1.3em;
}

.constants {
    background-color: #202020;
}

.results {
    background-color: #202020;
}

.formulas {
    background-color: #1a1a1a;
}

/* Layout */
.constants-calculator-container {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 20px;
    margin-bottom: 20px;
}

@media (max-width: 1024px) {
    .constants-calculator-container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
}

/* Input Grid */
.input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 15px;
    margin: 20px 0;
}

@media (max-width: 768px) {
    .input-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .constants-calculator-container {
        grid-template-columns: 1fr;
    }
}

/* Footer */
.footer {
    background-color: #2a2a2a;
    border-top: 1px solid #3a3a3a;
    padding: 20px 0;
    margin-top: 40px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.footer-section h3 {
    color: #ffffff;
    margin-bottom: 10px;
    font-size: 1.1em;
}

.footer-section p,
.footer-section a {
    color: #cccccc;
    font-size: 0.9em;
    text-decoration: none;
    margin-bottom: 5px;
    display: block;
}

.footer-section a:hover {
    color: #ffffff;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    margin-top: 20px;
    border-top: 1px solid #3a3a3a;
    color: #888888;
    font-size: 0.85em;
}

.error {
    color: #ff8888;
    font-style: italic;
}