/* ===== CARD FLIP SYSTEM ===== */
/* 3D flip interaction for wall profile cards */

/* ===== 3D PERSPECTIVE CONTAINER ===== */
.profile-card {
    perspective: 800px;
}

.card-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
}

.profile-card.flipped .card-inner {
    transform: rotateY(180deg);
}

/* ===== SHARED FACE RULES ===== */
.card-front,
.card-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* ===== FRONT FACE — PORTRAIT ONLY ===== */
.card-front {
    z-index: 2;
}

.card-front img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-front .media-placeholder {
    width: 100%;
    height: 100%;
    background: var(--bg-secondary);
    color: var(--color-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    opacity: 0.4;
}

/* ===== BACK FACE ===== */
.card-back {
    transform: rotateY(180deg);
    z-index: 1;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 5%;
    overflow: hidden;
}

/* Circular avatar — large */
.card-back-avatar {
    width: 52%;
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-primary);
    flex-shrink: 0;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-back-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-back-avatar .avatar-initials {
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-tertiary);
}

/* User (living) cards get gold avatar border */
.profile-card[data-type="user"]:not(.profile-card--ghost) .card-back-avatar {
    border-color: #d4af37;
}

/* Name */
.card-back-name {
    font-family: var(--font-content);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    text-align: center;
    margin-top: 4px;
    padding: 0 6px;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

/* Date / age + nationality */
.card-back-meta {
    font-size: 0.7rem;
    color: var(--color-secondary);
    text-align: center;
    margin-top: 2px;
    font-family: var(--font-content);
}

/* Tagline */
.card-back-tagline {
    font-size: 0.6rem;
    color: var(--color-tertiary);
    text-align: center;
    padding: 0 8px;
    margin-top: 3px;
    line-height: 1.35;
    font-style: italic;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    flex: 1;
    min-height: 0;
}

/* ===== CARD FOOTER ===== */
.card-footer {
    width: 100%;
    height: 24px;
    min-height: 24px;
    border-top: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5px;
    background: var(--bg-secondary);
    flex-shrink: 0;
    margin-top: auto;
}

.card-footer-left {
    display: flex;
    align-items: center;
    gap: 2px;
}

.card-footer-right {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Stack navigation arrows */
.stack-arrow {
    font-size: 0.65rem;
    color: var(--color-secondary);
    cursor: pointer;
    padding: 2px;
    line-height: 1;
    user-select: none;
    -webkit-user-select: none;
}

.stack-arrow:hover {
    color: var(--color-primary);
}

.stack-dots {
    font-size: 0.45rem;
    color: var(--color-tertiary);
    letter-spacing: 1px;
    line-height: 1;
}

.stack-dots .active {
    color: var(--color-primary);
}

/* Stats */
.card-stat {
    font-size: 0.6rem;
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    gap: 1px;
    white-space: nowrap;
}

.card-stat-icon {
    font-size: 0.65rem;
}

/* Flag */
.card-flag {
    font-size: 0.65rem;
    color: var(--color-tertiary);
    cursor: pointer;
    padding: 1px;
}

.card-flag:hover {
    color: var(--color-accent, #e24b4a);
}

/* View page button */
.card-view-btn {
    font-size: 0.5rem;
    padding: 2px 5px;
    border-radius: 3px;
    background: var(--color-accent, #2563eb);
    color: #fff;
    border: none;
    cursor: pointer;
    white-space: nowrap;
    line-height: 1.4;
    text-decoration: none;
    display: inline-block;
}

.card-view-btn:hover {
    opacity: 0.85;
}

/* ===== FLIP INTERACTION STATES ===== */

/* Flipped card pops up and scales — hover must NOT override */
.profile-card.flipped,
.profile-card.flipped:hover {
    z-index: 10;
    transform: scale(1.25);
    transition: transform 0.3s ease;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

/* Background blur when a card is flipped */
/* Can't blur rows because filter on parent blurs all children too */
/* Instead blur individual cards, exempting the flipped one */
.bookvitae-wall.has-flipped .profile-card:not(.flipped) {
    filter: blur(3px);
    opacity: 0.4;
    transition: filter 0.3s ease, opacity 0.3s ease;
}

/* The flipped card stays sharp */
.profile-card.flipped {
    filter: none;
    opacity: 1;
}

/* ===== DUPLICATE STACK FAN-OUT ON FLIP ===== */
.profile-card--duplicate.flipped {
    box-shadow: none;
}

/* Stack content swap animation */
.card-back-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    flex: 1;
    min-height: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.card-back-content.slide-out-left {
    opacity: 0;
    transform: translateX(-40%);
}

.card-back-content.slide-out-right {
    opacity: 0;
    transform: translateX(40%);
}

.card-back-content.slide-in-left {
    opacity: 0;
    transform: translateX(-40%);
    transition: none;
}

.card-back-content.slide-in-right {
    opacity: 0;
    transform: translateX(40%);
    transition: none;
}

/* ===== RESPONSIVE SCALING ===== */
@media (max-width: 480px) {
    .card-back {
        padding-top: 4%;
    }

    .card-back-name {
        font-size: 0.65rem;
    }

    .card-back-meta {
        font-size: 0.6rem;
    }

    .card-back-tagline {
        font-size: 0.5rem;
    }

    .card-footer {
        height: 24px;
        min-height: 24px;
    }

    .card-stat {
        font-size: 0.6rem;
    }

    .card-stat-icon {
        font-size: 0.65rem;
    }

    .stack-arrow {
        font-size: 0.7rem;
    }

    .card-flag {
        font-size: 0.7rem;
    }

    .card-view-btn {
        font-size: 0.5rem;
        padding: 2px 5px;
    }

    .profile-card.flipped,
    .profile-card.flipped:hover {
        transform: scale(1.35);
    }
}

@media (min-width: 1200px) {
    .card-back-avatar {
        width: 50%;
    }

    .card-back-name {
        font-size: var(--text-base);
    }

    .card-back-meta {
        font-size: 0.75rem;
    }

    .card-back-tagline {
        font-size: 0.65rem;
    }

    .card-footer {
        height: 28px;
        min-height: 28px;
        padding: 0 7px;
    }

    .card-stat {
        font-size: 0.65rem;
    }

    .card-stat-icon {
        font-size: 0.7rem;
    }

    .card-view-btn {
        font-size: 0.55rem;
        padding: 2px 6px;
    }
}