/* ============================================================
   Universe of Us — Panel Styles (Postcard + Modals + HUD)
   ============================================================ */

/* --- Dark Overlay --- */
#postcard-overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(5, 5, 16, 0.85);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    padding: var(--space-md);
}

#postcard-overlay.open {
    display: flex;
}

/* --- Postcard Panel --- */
.postcard {
    position: relative;
    width: 100%;
    max-width: 520px;
    max-height: 85vh;
    background: linear-gradient(145deg, #1a1a2e 0%, #121225 50%, #0d0d1e 100%);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transform: scale(0.85) rotate(-2deg);
    opacity: 0;
    box-shadow:
        0 0 0 1px rgba(255, 215, 0, 0.1),
        0 20px 60px rgba(0, 0, 0, 0.8),
        0 0 40px rgba(255, 107, 157, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.postcard.open {
    transform: scale(1) rotate(0deg);
    opacity: 1;
}

.postcard-border {
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    padding: 2px;
    pointer-events: none;
    z-index: 1;
}

.postcard-border::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    border: 1.5px solid transparent;
    background: linear-gradient(135deg, var(--category-color, #FFD700) 0%, transparent 50%, var(--category-color, #FFD700) 100%) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0.5;
}

.postcard-header {
    padding: var(--space-lg) var(--space-lg) var(--space-md);
    position: relative;
}

.postcard-category {
    font-family: var(--font-body);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--category-color, var(--color-accent-gold));
    opacity: 0.7;
    margin-bottom: var(--space-xs);
}

.postcard-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-text);
    line-height: 1.3;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
}

.postcard-date {
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: rgba(253, 251, 247, 0.4);
    margin-top: var(--space-xs);
}

.postcard-divider {
    height: 1px;
    margin: 0 var(--space-lg);
    background: linear-gradient(90deg, transparent, var(--category-color, #FFD70040), transparent);
}

.postcard-body {
    padding: var(--space-md) var(--space-lg) var(--space-lg);
    max-height: 55vh;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 215, 0, 0.2) transparent;
}

.postcard-body::-webkit-scrollbar {
    width: 3px;
}

.postcard-body::-webkit-scrollbar-track {
    background: transparent;
}

.postcard-body::-webkit-scrollbar-thumb {
    background: rgba(255, 215, 0, 0.2);
    border-radius: 3px;
}

.postcard-message {
    font-family: var(--font-body);
    font-size: 1.05rem;
    line-height: 1.8;
    color: rgba(253, 251, 247, 0.85);
    white-space: pre-line;
}

.postcard-message .line {
    display: block;
    opacity: 0;
    transform: translateY(8px);
}

.postcard-message .line.revealed {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}

.postcard-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5;
    transition: background 0.3s, transform 0.3s;
}

.postcard-close:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: scale(1.1);
}

.postcard-close svg {
    width: 16px;
    height: 16px;
    stroke: var(--color-text);
    stroke-width: 2;
}

.postcard-footer {
    padding: var(--space-sm) var(--space-lg) var(--space-md);
    text-align: right;
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: rgba(253, 251, 247, 0.3);
}

/* --- Shooting Star Catch Popup --- */
#shooting-star-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    z-index: 200;
    background: linear-gradient(145deg, #1a1a3e 0%, #0d0d2e 100%);
    border: 1px solid rgba(255, 215, 0, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--space-lg) var(--space-xl);
    max-width: 360px;
    width: 90%;
    text-align: center;
    opacity: 0;
    pointer-events: none;
    box-shadow: 0 0 40px rgba(255, 215, 0, 0.15), 0 20px 60px rgba(0, 0, 0, 0.6);
}

#shooting-star-popup.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
    pointer-events: auto;
}

.shooting-star-icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
}

.shooting-star-text {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
}

/* --- Navigation HUD --- */
#nav-hud {
    position: fixed;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 50;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(10, 10, 30, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.hud-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: rgba(253, 251, 247, 0.6);
}

.hud-icon {
    font-size: 1rem;
}

.hud-divider {
    width: 1px;
    height: 16px;
    background: rgba(255, 255, 255, 0.1);
}

/* --- Constellation Reveal Modal --- */
#constellation-modal {
    position: fixed;
    inset: 0;
    z-index: 300;
    background: rgba(5, 5, 16, 0.92);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    flex-direction: column;
    padding: var(--space-lg);
}

#constellation-modal.open {
    display: flex;
}

.constellation-name {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    color: var(--color-accent-gold);
    text-shadow: 0 0 30px rgba(255, 215, 0, 0.4);
    margin-bottom: var(--space-md);
    letter-spacing: 6px;
    text-transform: uppercase;
    text-align: center;
}

.constellation-message {
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: rgba(253, 251, 247, 0.8);
    max-width: 500px;
    text-align: center;
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.constellation-dismiss {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: rgba(253, 251, 247, 0.4);
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    transition: all 0.3s;
}

.constellation-dismiss:hover {
    color: var(--color-text);
    border-color: rgba(255, 215, 0, 0.3);
    background: rgba(255, 215, 0, 0.05);
}

/* --- Intro prompt --- */
#intro-prompt {
    position: fixed;
    top: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 50;
    text-align: center;
    pointer-events: none;
}

.intro-text {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: rgba(253, 251, 247, 0.5);
    animation: gentlePulse 3s ease-in-out infinite;
}

@keyframes gentlePulse {

    0%,
    100% {
        opacity: 0.5;
    }

    50% {
        opacity: 0.8;
    }
}