/* ═══════════════════════════════════════════════════════════════════════════
   Course Ads — relaunch theme system (build/home studio · shell terminal).
   Local --ca-* vars are mapped onto the shared theme tokens so a course ad
   adopts whichever theme its host page is in. See THEME_GUIDE.md.
   ═══════════════════════════════════════════════════════════════════════════ */

/* Base Variables — mapped to theme tokens */
.course-ad {
    --ca-pink: var(--accent);
    --ca-teal: var(--signal);
    --ca-yellow: var(--warn);
    --ca-purple: var(--accent-2);
    --ca-coral: var(--accent-3);
    --ca-pink-light: color-mix(in srgb, var(--accent) 45%, var(--surface));
    --ca-teal-light: color-mix(in srgb, var(--signal) 45%, var(--surface));
    --ca-yellow-light: color-mix(in srgb, var(--warn) 45%, var(--surface));
    --ca-black: var(--ink);
    --ca-off-white: var(--surface);
    --ca-gray: var(--muted);
}

/* ─── Base Container ─── */
.course-ad {
    position: relative;
    width: 100%;
    background: var(--ca-off-white);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    font-family: var(--font-body);
}

/* ─── Content Area ─── */
.course-ad__content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.7rem 1.1rem 0.8rem;
    position: relative;
    z-index: 1;
    gap: 0.45rem;
    text-align: center;
}

/* ─── Headline ─── */
.course-ad__headline {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--ca-black);
    line-height: 1.25;
    margin: 0;
    margin-top: 0.15rem;
}

.course-ad__accent--teal {
    color: var(--ca-teal);
}

.course-ad__accent--pink {
    color: var(--ca-pink);
}

/* ─── Subtitle ─── */
.course-ad__subtitle {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--ca-gray);
    line-height: 1.45;
    margin: 0;
}

/* ─── Social Proof ─── */
.course-ad__proof {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: 0.05rem;
}

.course-ad__avatars {
    display: flex;
}

.course-ad__avatar {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--ca-off-white);
    margin-left: -6px;
    object-fit: cover;  /* For real avatar images */
}

.course-ad__avatar:first-child {
    margin-left: 0;
}

.course-ad__avatar--1 {
    background: var(--ca-teal);
}

.course-ad__avatar--2 {
    background: var(--ca-pink);
}

.course-ad__avatar--3 {
    background: var(--ca-purple);
}

.course-ad__avatar--4 {
    background: var(--ca-coral);
}

.course-ad__proof-text {
    font-size: 0.56rem;
    font-weight: 600;
    color: var(--ca-gray);
}

/* ─── CTA Button ─── */
.course-ad__cta {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 0.5rem 1.2rem;
    background: var(--accent);
    color: #fff;
    font-family: inherit;
    font-size: 0.73rem;
    font-weight: 700;
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
    animation: cta-glow 2.5s ease-in-out infinite;
}

/* Hover state for CTA - triggered by parent link hover */
a:hover .course-ad__cta {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
    background: var(--accent-strong);
    animation-play-state: paused;
}

/* ─── CTA Pulse Animation — soft accent glow ─── */
@keyframes cta-glow {
    0%, 100% {
        box-shadow: var(--shadow-sm);
    }
    50% {
        box-shadow: var(--shadow-sm),
                    0 0 14px color-mix(in srgb, var(--accent) 45%, transparent);
    }
}