:root {
    --background-color: #0d1117;
    --card-bg: rgba(22, 27, 34, 0.8);
    --text-color: #c9d1d9;
    --accent-blue: #58a6ff;
    --accent-green: #3fb950;
    --border-color: rgba(48, 54, 61, 0.8);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.stat-card {
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.15), rgba(88, 166, 255, 0.05));
    border: 1px solid rgba(88, 166, 255, 0.2);
    border-radius: 24px;
    padding: 30px;
    margin-bottom: 25px;
    position: relative;
    overflow: hidden;
}

.stat-card::after {
    content: "";
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(88, 166, 255, 0.2), transparent 70%);
    filter: blur(40px);
}

.btn {
    display: block;
    width: 100%;
    padding: 15px;
    background: linear-gradient(90deg, #58a6ff, #1f6feb);
    color: white;
    text-align: center;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 8px 20px -5px rgba(88, 166, 255, 0.4);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px -5px rgba(88, 166, 255, 0.5);
    filter: brightness(1.1);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
    color: #8b949e;
}

.form-control {
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1.5px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 12px 15px;
    color: #fff;
    font-size: 15px;
    transition: 0.3s;
    box-sizing: border-box;
    outline: none;
}

.form-control:focus {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 4px rgba(88, 166, 255, 0.15);
}

.bottom-nav {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 40px);
    max-width: 460px;
    background: rgba(22, 27, 34, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    display: flex;
    justify-content: space-around;
    padding: 12px 5px;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
    z-index: 1000;
}

.nav-item {
    text-align: center;
    color: #8b949e;
    text-decoration: none;
    font-size: 10px;
    padding: 8px 0;
    width: 25%;
    transition: 0.3s;
}

.nav-item i {
    font-size: 20px;
    margin-bottom: 4px;
}

.nav-item.active {
    color: var(--accent-blue);
}

.nav-item.active i {
    transform: translateY(-2px);
}