:root {
    --navy: #0a1128;
    --white: #f8f9fa;
    --gold: #f5b301;   /* warmed to a duck-bill yellow */
    --pond: #0f7a78;   /* teal accent - "ripples on the pond" */
    --slate: #1e293b;
}

* { box-sizing: border-box; }

body, html {
    margin: 0; padding: 0;
    font-family: 'Inter', sans-serif;
    color: var(--navy);
    overflow-x: hidden;
    min-height: 100vh;
    background: linear-gradient(180deg, #fffaeb 0%, #f4fbfa 45%, #ffffff 100%);
}

/* ── Background ─────────────────────────────────────────────────── */

.blueprint-bg {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1;
    background-image:
        linear-gradient(rgba(10, 17, 40, 0.05) 1.5px, transparent 1.5px),
        linear-gradient(90deg, rgba(10, 17, 40, 0.05) 1.5px, transparent 1.5px);
    background-size: 80px 80px;
}

/* ── Nav ────────────────────────────────────────────────────────── */

nav {
    display: flex; justify-content: space-between; align-items: center;
    padding: 25px 8%;
    background: rgba(248, 249, 250, 0.98);
    border-bottom: 3px solid var(--navy);
    position: sticky; top: 0; z-index: 100;
}

.logo {
    font-weight: 900; text-transform: uppercase; color: var(--navy);
    font-size: clamp(0.95rem, 4.2vw, 1.5rem);
    letter-spacing: clamp(1px, 0.6vw, 6px);
    white-space: nowrap;
}

.nav-link {
    position: relative; overflow: hidden;
    color: var(--white); text-decoration: none; font-size: 0.75rem; font-weight: 800;
    text-transform: uppercase; letter-spacing: 2px;
    padding: 12px 28px; background: var(--navy);
    transition: background 0.2s, color 0.2s; white-space: nowrap;
}

.nav-link:hover { background: var(--gold); color: var(--navy); }

/* Water-ripple pulse on hover, matching the "quack" pond motif */
.nav-link::after, .signal-cta::after {
    content: "";
    position: absolute; top: 50%; left: 50%;
    width: 0; height: 0;
    background: rgba(255, 255, 255, 0.45);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.45s ease, height 0.45s ease, opacity 0.45s ease;
    opacity: 0;
    pointer-events: none;
}

.nav-link:hover::after, .signal-cta:hover::after {
    width: 240px; height: 240px;
    opacity: 1;
}

@media (max-width: 650px) {
    nav { padding: 18px 5%; }
    .nav-link { padding: 8px 14px; font-size: 0.65rem; letter-spacing: 1px; }
}

/* ── Hero ───────────────────────────────────────────────────────── */

.hero {
    max-width: 1200px; margin: 0 auto; padding: 10vh 20px;
    text-align: center;
    background:
        radial-gradient(ellipse 60% 50% at 25% 20%, rgba(245, 179, 1, 0.16), transparent 70%),
        radial-gradient(ellipse 60% 50% at 80% 60%, rgba(15, 122, 120, 0.14), transparent 70%);
}

.brand-h1 {
    font-size: clamp(2.5rem, 14vw, 11rem);
    font-weight: 900; margin: 0;
    text-transform: uppercase; letter-spacing: -0.04em;
    color: var(--navy); line-height: 0.9;
}

.hero-tagline {
    font-size: 1.1rem; color: var(--slate);
    margin: 30px auto 0; max-width: 600px;
    line-height: 1.6; opacity: 0.75;
}

@media (max-width: 600px) {
    .brand-h1 { font-size: 13vw; }
}

/* ── Cards ──────────────────────────────────────────────────────── */

.grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px; margin-top: 60px; padding: 0 5%;
}

.card {
    background: white; padding: 60px 40px;
    border: 1.5px solid var(--navy);
    border-top: 5px solid var(--gold);
    text-align: left;
    transition: 0.2s cubic-bezier(0.17, 0.67, 0.83, 0.67);
}

.grid#topics .card:nth-child(2) { border-top-color: var(--pond); }
.grid#topics .card:nth-child(2) h3 { color: var(--pond); }
.grid#topics .card:nth-child(3) { border-top-color: var(--navy); }
.grid#topics .card:nth-child(3) h3 { color: var(--navy); }

.card:hover {
    transform: translate(-12px, -12px);
    box-shadow: 12px 12px 0px var(--gold);
}

.card h3 {
    font-size: 0.8rem; text-transform: uppercase;
    letter-spacing: 3px; color: var(--gold); margin-bottom: 15px;
}

.card p { font-size: 1rem; line-height: 1.6; color: var(--slate); margin: 0; }

@media (max-width: 600px) {
    .card { padding: 30px 24px; }
}

/* ── Signal Line ────────────────────────────────────────────────── */

.signal-line {
    margin-top: 60px;
    padding: 60px 20px 80px;
    text-align: center;
    position: relative; z-index: 1;
    background: linear-gradient(135deg, var(--navy) 0%, #123a5c 100%);
}

.signal-inner {
    max-width: 600px; margin: 0 auto;
}

.signal-status {
    font-size: 0.9rem; letter-spacing: 6px;
    text-transform: uppercase; color: var(--gold);
    opacity: 0.9; margin-bottom: 30px;
}

.signal-cta {
    position: relative; overflow: hidden;
    display: inline-block;
    color: var(--navy); background: var(--gold);
    text-decoration: none; font-weight: 900;
    letter-spacing: 4px; text-transform: uppercase;
    font-size: 0.9rem; padding: 18px 40px;
    transition: background 0.2s, color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.signal-cta:hover {
    background: var(--pond); color: var(--white);
    transform: translate(-5px, -5px);
    box-shadow: 5px 5px 0px var(--gold);
}

.signal-sub {
    margin-top: 20px; font-size: 0.85rem; letter-spacing: 2px;
    text-transform: uppercase; color: var(--white); opacity: 0.65;
}

/* ── Content sections (page-specific, on top of the sale template) ─── */

.hero-heading {
    font-size: clamp(1.8rem, 4.5vw, 3rem);
    font-weight: 900; margin: 0;
    letter-spacing: -0.01em;
    color: var(--navy); line-height: 1.1;
}

.hero-tagline-left {
    font-size: 1.05rem; color: var(--slate);
    margin: 20px auto 0; max-width: 700px;
    line-height: 1.6; text-align: left;
}

.section-title {
    font-size: 1.5rem; font-weight: 900;
    text-transform: uppercase; letter-spacing: 2px;
    color: var(--navy); text-align: center;
    margin: 0 0 30px;
}

.grid-single {
    max-width: 800px; margin: 60px auto 0; padding: 0 5%;
}

.grid-single .card {
    border-top: 1.5px solid var(--navy);
    border-left: 5px solid var(--pond);
}

.grid-single .card:hover {
    transform: none; box-shadow: none;
}

/* ── Quack accent: logo bob ───────────────────────────────────────── */

.quack-emoji {
    display: inline-block;
    margin-left: 4px;
    animation: quack-bob 2.6s ease-in-out infinite;
}

@keyframes quack-bob {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50%      { transform: translateY(-4px) rotate(-8deg); }
}

@media (prefers-reduced-motion: reduce) {
    .quack-emoji { animation: none; }
}

/* ── Hero ripple rings ("quack" ripples on the pond) ─────────────── */

.hero { position: relative; overflow: hidden; }

.hero-heading, .hero-tagline-left { position: relative; z-index: 1; }

.ripple-rings {
    position: absolute; top: 50%; left: 50%;
    width: 0; height: 0; z-index: 0; pointer-events: none;
}

.ripple-rings span {
    position: absolute; top: 0; left: 0;
    width: 320px; height: 320px;
    margin: -160px 0 0 -160px;
    border: 3px solid var(--pond);
    border-radius: 50%;
    opacity: 0;
    animation: ripple-expand 6s ease-out infinite;
}

.ripple-rings span:nth-child(2) { border-color: var(--gold); animation-delay: 2s; }
.ripple-rings span:nth-child(3) { animation-delay: 4s; }

@keyframes ripple-expand {
    0%   { transform: scale(0.2); opacity: 0.55; }
    70%  { opacity: 0.15; }
    100% { transform: scale(3.4); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
    .ripple-rings span { animation: none; opacity: 0.15; }
}

/* ── Scroll reveal ─────────────────────────────────────────────────── */

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
}

.section-title::after {
    content: "";
    display: block;
    width: 60px; height: 4px;
    background: linear-gradient(90deg, var(--gold), var(--pond));
    margin: 12px auto 0;
}

/* ── FAQ accordion theming (override Bootstrap's default blue) ─────── */

.accordion-button:not(.collapsed) {
    color: var(--navy);
    background-color: rgba(15, 122, 120, 0.08);
    box-shadow: inset 0 -1px 0 rgba(10, 17, 40, 0.1);
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.2rem rgba(15, 122, 120, 0.25);
    border-color: var(--pond);
}