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

:root {
    --bg: #12181f;             
    --accent: #ff8548;       
    --accent-2: #d9662a;
    --text: #ece7db;           
    --text-dim: #a09a8c;
    --border: rgba(255, 133, 72, 0.25);
    --card-bg: rgba(28, 36, 46, 0.85);
}

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    position: relative;
}

#starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.4;
}

.container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Header */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 60px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

.site-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
    display: flex;
    align-items: center;
}

.site-title .subtitle {
    font-size: 1rem;
    color: var(--text-dim);
}

.header-meta {
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-family:system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 0.85rem;
    color: var(--text-dim);
    text-align: right;
}

.api-status {
    color: var(--accent);
}

/* cards */
 .content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.card {
    background: var(--card-bg);
    border-radius: 10px;
    border: 2px solid var(--border);
    padding: 30px;
    position: relative;
}

.card:hover {
    background: var(--card-bg);
    border: 2px solid var(--accent);
    border-radius: 10px;
    padding: 30px;
    position: relative;
}

.card:hover .card-title {
    color: var(--accent);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-subtitle {
    font-size: 1rem;
    color: var(--text-dim);
    font-family:'Times New Roman', Times, serif;
}

/* APOD */
.apod-image, .nasa-image {
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 2px solid var(--border);
    transition: border-color 0.3s ease;
}

.apod-image:hover, .nasa-image:hover {
    border-color: var(--accent);
    transition: border-color 0.3s ease;
}

.apod-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent);
}

.apod-date, .nasa-meta {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 12px;
    font-family: 'JetBrains Mono', monospace;
}

.apod-desc {
    font-size: 0.9rem;
    color: var(--text);
    line-height: 1.5;
    margin-bottom: 20px;
    max-height: 150px;
    overflow: auto;
}
.apod-nav {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.nav-button {
    background: var(--accent);
    color: var(--text);
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.nav-button:hover {
    background: var(--accent-2);
}

.nav-button:disabled {
    background: var(--border);
    cursor: not-allowed;
}

/* NEO */
.neo-list {
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: 20px;
}

.neo-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid var(--border);
}

.neo-item:last-child {
    border-bottom: none;
}

.neo-name {
    font-size: 1rem;
    color: var(--text);
}

.neo-hazard-badge {
    background: var(--accent);
    color: var(--text);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.neo-size {
    font-size: 0.9rem;
    color: var(--text-dim);
}

.neo-distance {
    font-size: 0.9rem;
    color: var(--accent);
}

/* weight Calci */
.weight-calculator {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.weight-calculator input {
    padding: 8px;
    border-radius: 5px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text);
}

.weight-calculator button {
    padding: 8px;
    border-radius: 5px;
    border: none;
    background: var(--accent);
    color: var(--text);
    cursor: pointer;
    transition: background 0.3s ease;
}

#weight-results { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.weight-result {
    padding: 10px;
    background: var(--card-bg);
    border-radius: 5px;
    border: 1px solid var(--border);
    text-align: center;
}

.weight-result .planet-name {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 4px;
}

.weight-result .weight-value {
    font-size: 1rem;
    color: var(--text);
   margin-top: 4px;
}

/* fact */
.fact-container {
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
}

.fact-text {
    font-style: italic;
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text);
    text-align: center;
}

.fact-btn {
    width: 100%;
    padding: 15px;
    background: var(--accent);
    border: none;
    color: var(--bg);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    font-family: 'Space Grotesk', sans-serif;
    transition: all 0.3s;
}

.fact-btn:hover {
    background: var(--accent-2);
}

/* Mission Log */ 
.log-input-wrapper {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.log-input-wrapper input {
    flex: 1;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text);
}

.log-input-wrapper button {
    padding: 10px;
    border-radius: 5px;
    border: none;
    background: var(--accent);
    color: var(--text);
    cursor: pointer;
    transition: background 0.3s ease;
}

.log-btn {
    padding: 12px 24px;
    background: var(--accent);
    border: none;
    color: var(--bg);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    font-family: 'Space Grotesk', sans-serif;
    transition: all 0.3s;
}

.log-btn:hover {
    background: var(--accent-2);
}

.log-list {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: 5px;
    background: var(--card-bg);
}

.log-entry{
    padding: 10px;
    border-bottom: 1px solid var(--border);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.log-time {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 4px;
}

.delete-log:hover {
    color: var(--accent);
    cursor: pointer;
}

.empty-log {
    text-align: center;
    color: var(--text-dim);
    font-style: italic;
    padding: 20px;
}

/* solar system */
.solar-system {
    position: relative;
    height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.sun {
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, #ffcc00, #ff9900);
    border-radius: 50%;
    box-shadow: 0 0 30px rgba(255, 204, 0, 0.7);
    position: relative;
}

.orbit {
    position: absolute;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    pointer-events: none;
}

.planet {
    position: absolute;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    cursor: pointer;
    transition: transform 0.2s;
}

.planet-label {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8rem;
    color: var(--text);
    white-space: nowrap;
}

.planet:hover {
    transform: translate(-50%, -50%) scale(1.1);
}

.planet-label {
    position: absolute;
    font-size: 1rem;
    color: var(--text);
    white-space: nowrap;
}

.planet:hover .planet-label {
    opacity: 1;
}

/* Footer */
.main-footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 2px solid var(--border);
}

.footer-note {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 10px;
}

.footer-tech {
    font-size: 1rem;
    color: var(--text-dim);
}

.footer-tech a {
    color: var(--accent);
    text-decoration: none;
}

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

/* Loading */
.loading {
    color: var(--text-dim);
    align-items: center;
    padding: 20px;
    text-align: center;
}

/* responsive */
@media (max-width: 768px) {
    .main-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-meta {
        text-align: left;
    }

    .content-grid {
        grid-template-columns: 1fr;
        align-items: start;
    }
}

.card-solar { grid-column: 1 / -1; }