:root {
    --bg-color: #000000;
    --card-bg: #1C1C1E;
    --text-primary: #FFFFFF;
    --text-secondary: #8E8E93;
    --accent-green: #34C759;
    --accent-red: #FF3B30;
    --border-color: #38383A;
    --accent-blue: #0A84FF;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem 1rem;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

/* Header Section */
header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.logo-container {
    margin-bottom: 1rem;
}

.logo {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    object-fit: contain;
    background: #111;
}

.logo:hover {
    transform: scale(1.05);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: -0.01em;
}

.tagline {
    font-size: 1rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 0.5rem;
}

/* Links & Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    background-color: var(--card-bg);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 999px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.2s ease;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn:hover {
    background-color: #2C2C2E;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.btn-primary {
    background-color: var(--accent-blue);
    color: #fff;
    border-color: var(--accent-blue);
}

.btn-primary:hover {
    background-color: #007AFF;
}

/* Dashboard / Chart Area */
.dashboard-card {
    background-color: var(--card-bg);
    border-radius: 20px;
    padding: 24px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.card-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
    width: 100%;
}

.metric-box {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.metric-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.metric-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.metric-unit {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.metric-trend {
    font-size: 0.9rem;
    font-weight: 600;
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.trend-up {
    color: var(--accent-green);
}

.trend-down {
    color: var(--accent-red);
}

/* Chart Container */
.chart-container {
    position: relative;
    height: 350px;
    width: 100%;
    margin-top: 10px;
}

/* Timeframe Segmented Controls */
.timeframe-controls {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 4px;
    display: inline-flex;
    margin: 0 auto;
}

.timeframe-btn {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 6px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.timeframe-btn:hover {
    color: var(--text-primary);
}

.timeframe-btn.active {
    background-color: #38383A;
    color: var(--text-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Social Links */
.social-links {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
    color: var(--text-primary);
}

.social-link:hover {
    background-color: #2C2C2E;
    transform: translateY(-3px);
}

.social-link svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

/* Loading State */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    min-height: 200px;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Footer */
footer {
    margin-top: 4rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding-bottom: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .metrics-grid {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 2rem;
    }

    .chart-container {
        height: 250px;
    }
}