:root {
    --bs-dark-rgb: 17, 24, 39;
    --bs-body-bg: #111827;
    --bs-body-color: #F9FAFB;
    --primary-color: #00A8E8;
    --surface-color: #1F2937;
}

body {
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.navbar {
    background-color: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: bold;
}

#hero {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bs-body-bg) 0%, var(--surface-color) 100%);
}

#hero h1 {
    font-weight: 700;
    color: #fff;
}

.lead {
    color: #d1d5db;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    padding: 12px 30px;
    font-weight: bold;
    border-radius: 0.5rem;
    transition: background-color 0.3s, border-color 0.3s;
}

.btn-primary:hover {
    background-color: #0077b6;
    border-color: #0077b6;
}

section {
    border-bottom: 1px solid var(--surface-color);
}

.bg-dark-surface {
    background-color: var(--surface-color);
}

.card {
    background-color: #374151;
    border: none;
    border-radius: 0.5rem;
    color: var(--bs-body-color);
}

.form-control {
    background-color: #4b5563;
    border-color: #6b7280;
    color: #fff;
    border-radius: 0.5rem;
}

.form-control:focus {
    background-color: #4b5563;
    border-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 0 0 0.25rem rgba(0, 168, 232, 0.25);
}

.form-control::placeholder {
    color: #9ca3af;
}

.form-label {
    color: #d1d5db;
}

.text-primary {
    color: var(--primary-color) !important;
}

footer {
    background-color: var(--surface-color);
    color: #9ca3af;
}

.alert {
    border-radius: 0;
    position: fixed;
    top: 56px; /* Height of navbar */
    width: 100%;
    z-index: 1031; /* Above sticky navbar */
}