body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #0f172a;
    color: #e5e7eb;
}

.app-header {
    background: #020617;
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid #1f2937;
}

.logo {
    width: 110px;
    height: 110px;
    object-fit: contain;
    margin: 0 auto 10px auto;
    display: block;
    border-radius: 20px;
}

.app-title {
    font-size: 20px;
    font-weight: bold;
    color: #e5e7eb;
}

.container {
    padding: 16px;
    max-width: 600px;
    margin: auto;
}

.card {
    background: #111827;
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 14px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

.card h2 {
    margin-top: 0;
}

.btn {
    display: block;
    width: 100%;
    box-sizing: border-box;
    padding: 16px;
    margin: 10px 0;
    border-radius: 14px;
    text-align: center;
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
    border: none;
    transition: transform 0.1s ease;
}

.btn:active {
    transform: scale(0.97);
}

/* Button colors */
.btn-blue { background: #2563eb; color: white; }
.btn-green { background: #16a34a; color: white; }
.btn-purple { background: #7c3aed; color: white; }
.btn-orange { background: #f59e0b; color: black; }
.btn-red { background: #dc2626; color: white; }
.btn-dark { background: #1f2937; color: white; }
.btn-teal { background: #14b8a6; color: white; }

input, select, textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 14px;
    font-size: 17px;
    border-radius: 12px;
    border: 1px solid #374151;
    margin-top: 6px;
    margin-bottom: 14px;
    background: #020617;
    color: #e5e7eb;
}

label {
    font-weight: bold;
}

.message {
    font-weight: bold;
    color: #38bdf8;
}

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #020617;
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
    border-top: 1px solid #1f2937;
}

.bottom-nav a {
    color: #e5e7eb;
    text-decoration: none;
    font-size: 13px;
}

.page-spacer {
    height: 70px;
}