:root {
    --prism-navy: #0f172a;
    --prism-navy-light: #1e293b;
    --prism-slate: #334155;
    --prism-slate-muted: #64748b;
    --prism-amber: #f59e0b;
    --prism-amber-light: #fbbf24;
    --prism-white: #f8fafc;
    --prism-bg: #f1f5f9;
    --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont,
        "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

@media (min-width: 768px) {
    html {
        font-size: 17px;
    }
}

body {
    font-family: var(--font-sans);
    color: var(--prism-slate);
    background-color: var(--prism-bg);
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

/* Header */
.site-header {
    background: linear-gradient(
        135deg,
        var(--prism-navy) 0%,
        var(--prism-navy-light) 100%
    );
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.2);
}

.site-header .navbar {
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
}

.site-header .navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--prism-white) !important;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.brand-logo {
    height: 2rem;
    width: auto;
    vertical-align: middle;
}

.site-header .nav-link {
    color: rgba(248, 250, 252, 0.9) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 0.375rem;
}

.site-header .nav-link:hover,
.site-header .nav-link:focus {
    color: var(--prism-amber-light) !important;
    background: rgba(255, 255, 255, 0.06);
}

/* Main content */
.site-main {
    flex: 1;
    padding-top: 2rem;
    padding-bottom: 3rem;
}

.container-narrow {
    max-width: 720px;
    margin-inline: auto;
}

/* Typography */
.page-title {
    font-weight: 700;
    color: var(--prism-navy);
    margin-bottom: 1rem;
}

.lead-text {
    font-size: 1.15rem;
    color: var(--prism-slate-muted);
    margin-bottom: 1.5rem;
}

/* Cards */
.card-prism {
    background: #fff;
    border-radius: 0.75rem;
    border: 1px solid #e2e8f0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.card-prism.card-warning {
    background: #fef2f2;
    border-color: #fecaca;
    box-shadow: 0 2px 8px rgba(220, 38, 38, 0.12);
}

.card-prism.card-warning .card-warning-title {
    color: #b91c1c;
}

.card-prism .card-body {
    padding: 1.5rem 1.75rem;
}

.card-prism .feature-card-icon {
    height: 2.75rem;
    width: auto;
    display: block;
    margin-bottom: 1rem;
}

.card-prism .card-title {
    font-weight: 600;
    color: var(--prism-navy);
    margin-bottom: 0.5rem;
}

/* Buttons */
.btn-prism {
    background: linear-gradient(135deg, var(--prism-amber) 0%, #d97706 100%);
    color: #fff;
    font-weight: 600;
    border: none;
    padding: 0.625rem 1.25rem;
    border-radius: 0.5rem;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.35);
}

.btn-prism:hover {
    background: linear-gradient(
        135deg,
        var(--prism-amber-light) 0%,
        var(--prism-amber) 100%
    );
    color: #fff;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

.btn-outline-prism {
    color: var(--prism-navy);
    border: 2px solid var(--prism-slate);
    font-weight: 600;
    border-radius: 0.5rem;
}

.btn-outline-prism:hover {
    background: var(--prism-navy);
    color: #fff;
    border-color: var(--prism-navy);
}

/* Hero section (home) */
.hero {
    background: linear-gradient(
        135deg,
        var(--prism-navy) 0%,
        var(--prism-navy-light) 100%
    );
    color: var(--prism-white);
    padding: 3rem 1.5rem 3.5rem;
    margin-bottom: 2rem;
    border-radius: 1rem;
    text-align: center;
}

.hero h1 {
    font-weight: 700;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.hero .hero-sub {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 540px;
    margin-inline: auto;
}

/* Feature list */
.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    position: relative;
    padding-left: 1.75rem;
    margin-bottom: 0.75rem;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--prism-amber);
    font-weight: 700;
    font-size: 1.1rem;
}

/* Footer */
.site-footer {
    background: var(--prism-navy);
    color: rgba(248, 250, 252, 0.85);
    padding: 1.5rem 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem 1.5rem;
    text-align: center;
}

.footer-links a {
    color: var(--prism-amber-light);
    text-decoration: none;
    font-weight: 500;
}

.footer-links a:hover {
    text-decoration: underline;
}

.footer-copyright {
    margin: 0;
    font-size: 0.9rem;
}

/* Forms */
.form-control:focus,
.form-select:focus {
    border-color: var(--prism-amber);
    box-shadow: 0 0 0 0.2rem rgba(245, 158, 11, 0.25);
}

.form-label {
    font-weight: 500;
    color: var(--prism-navy);
}

/* Alerts */
.alert-success {
    background: #ecfdf5;
    border-color: #a7f3d0;
    color: #065f46;
}

.alert-danger {
    background: #fef2f2;
    border-color: #fecaca;
    color: #991b1b;
}

/* Demo page */
.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 0.75rem;
    background: var(--prism-navy-light);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Support FAQ */
.accordion-prism .accordion-button {
    font-weight: 600;
    color: var(--prism-navy);
    background: #fff;
}

.accordion-prism .accordion-button:not(.collapsed) {
    background: var(--prism-white);
    color: var(--prism-navy);
    box-shadow: none;
}

.accordion-prism .accordion-button:focus {
    box-shadow: 0 0 0 0.2rem rgba(245, 158, 11, 0.25);
}

/* Utility */
.text-prism-amber {
    color: var(--prism-amber);
}

.bg-prism-card {
    background: #fff;
    border-radius: 0.75rem;
    border: 1px solid #e2e8f0;
}