:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #fc4c02; /* Strava orange */
    --accent-hover: #e34402;
    --border-color: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, rgba(252, 76, 2, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(56, 189, 248, 0.1) 0px, transparent 50%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.glass-container {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    width: 100%;
    max-width: 1000px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #f8fafc, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.primary-btn {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px -1px rgba(252, 76, 2, 0.3);
}

.primary-btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 8px -1px rgba(252, 76, 2, 0.4);
}

.primary-btn:active {
    transform: translateY(0);
}

/* Toggle Switch */
.toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    font-weight: 500;
}

.toggle input {
    display: none;
}

.slider {
    width: 44px;
    height: 24px;
    background-color: #334155;
    border-radius: 34px;
    position: relative;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: .4s;
}

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

input:checked + .slider:before {
    transform: translateX(20px);
}

.chart-container {
    position: relative;
    height: 500px;
    width: 100%;
    background: rgba(15, 23, 42, 0.4);
    border-radius: 12px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
}

.hidden {
    display: none !important;
}

.loading, .empty-state {
    color: var(--text-secondary);
    text-align: center;
    font-size: 1.1rem;
}

.date-input {
    background-color: rgba(30, 41, 59, 0.8);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 6px;
    font-family: 'Inter', sans-serif;
    color-scheme: dark;
    cursor: pointer;
    outline: none;
    transition: all 0.2s ease;
}

.date-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(252, 76, 2, 0.2);
}

/* Paywall styling */
.paywall-card {
    background: rgba(30, 41, 59, 0.9);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    max-width: 500px;
    margin: 2rem auto;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.paywall-card h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.paywall-card .subtitle {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.paywall-card .pricing-badge {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #f8fafc, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.paywall-card .pricing-badge .period {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-secondary);
    -webkit-text-fill-color: var(--text-secondary);
}

.paywall-card .features-list {
    text-align: left;
    list-style: none;
    margin-bottom: 1.5rem;
    width: 100%;
}

.paywall-card .features-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.paywall-card .features-list li strong {
    color: var(--text-primary);
}

.paywall-card .upgrade-btn {
    width: 100%;
}