/* Dark theme variables */
:root {
    --bg-color: #282c34;
    --card-bg: #21252b;
    --text-color: #abb2bf;
    --heading-color: #e06c75;
    --input-bg: #1e2127;
    --input-border: #3e4451;
    --button-primary: #61afef;
    --button-hover: #56b6c2;
    --highlight-color: #42A5F5;
    --tier-color: #98c379;
    --footer-bg: #1e2127;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 20px;
}

header h1 {
    color: var(--heading-color);
    margin-bottom: 10px;
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h2 {
    color: var(--heading-color);
    margin-bottom: 15px;
    border-bottom: 1px solid var(--input-border);
    padding-bottom: 10px;
}

h3 {
    color: var(--heading-color);
    margin: 15px 0;
}

/* Input grid */
.input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

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

label {
    margin-bottom: 5px;
}

input, select {
    padding: 8px 10px;
    border-radius: 4px;
    border: 1px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-color);
}

input:focus, select:focus {
    outline: 1px solid var(--button-primary);
}

/* Block section */
.block-section {
    margin-top: 20px;
}

/* One-row grid for ship blocks */
.blocks-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

/* Button */
.primary-button {
    background-color: var(--button-primary);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    display: block;
    margin: 20px auto 0;
    transition: background-color 0.3s;
}

.primary-button:hover {
    background-color: var(--button-hover);
}

/* Results section */
.results {
    display: block;
}

.results-section {
    margin-bottom: 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 10px;
}

.stat-group {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
}

.stat-label {
    font-weight: bold;
}

.stat-value {
    text-align: right;
}

/* Tier usage */
.tier-grid {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
}

.tier {
    text-align: center;
}

.tier-label {
    font-weight: bold;
    color: var(--tier-color);
    margin-right: 10px;
}

/* Components */
.components-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.component {
    padding: 8px;
    border-radius: 4px;
}

.component.active {
    font-weight: bold;
    color: var(--highlight-color);
}

/* Status area */
.status-area {
    margin-top: 20px;
    padding: 10px;
    border-radius: 4px;
    min-height: 50px;
    background-color: var(--input-bg);
}

/* Footer */
footer {
    text-align: center;
    margin-top: 30px;
    padding: 15px 0;
    border-top: 1px solid var(--input-border);
    background-color: var(--footer-bg);
}

footer a {
    color: var(--button-primary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .input-grid, .stats-grid, .components-grid, .blocks-grid {
        grid-template-columns: 1fr;
    }
    
    .tier-grid {
        flex-direction: column;
    }
    
    .tier {
        margin-bottom: 10px;
    }
}