@import url('https://fonts.googleapis.com/css2?family=Baskervville:ital@0;1&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden;
    background: #000;
    color: #fff;
}

#canvas-container {
    width: 100vw;
    height: 100vh;
    opacity: 0;
    transition: opacity 0.8s ease-in;
}

#canvas-container.loaded {
    opacity: 1;
}

.info-panel {
    position: absolute;
    top: 0;
    left: 0;
    height: 100vh;
    width: 400px;
    background: linear-gradient(to right,
        rgba(0, 0, 0, 0.9) 0%,
        rgba(0, 0, 0, 0.6) 60%,
        rgba(0, 0, 0, 0) 100%);
    padding: 60px 40px;
    font-family: "Baskervville", serif;
    z-index: 10;
    opacity: 0;
    transform: translateX(-50px);
    display: none;
}

.info-panel.show {
    display: block;
    animation: slideInFade 1.4s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
}

.info-panel h1 {
    font-size: 48px;
    font-weight: 400;
    margin-bottom: 20px;
    letter-spacing: 1px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s cubic-bezier(0.22, 0.61, 0.36, 1) 0.3s forwards;
}

.info-panel h2 {
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 30px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s cubic-bezier(0.22, 0.61, 0.36, 1) 0.5s forwards;
}

.info-panel p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(20px);
}

.info-panel p:nth-of-type(1) {
    animation: fadeInUp 1s cubic-bezier(0.22, 0.61, 0.36, 1) 0.7s forwards;
}

.info-panel p:nth-of-type(2) {
    animation: fadeInUp 1s cubic-bezier(0.22, 0.61, 0.36, 1) 0.9s forwards;
}

.info-panel p:nth-of-type(3) {
    animation: fadeInUp 1s cubic-bezier(0.22, 0.61, 0.36, 1) 1.1s forwards;
}

@keyframes slideInFade {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInUp {
    to {
        opacity: 0.9;
        transform: translateY(0);
    }
}

.explore-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.9);
    color: #000000;
    border: none;
    padding: 8px 14px;
    font-family: 'Baskervville', serif;
    font-size: 24px;
    font-weight: 700;
    cursor: pointer;
    border-radius: 12px;
    margin-top: 30px;
    letter-spacing: -0.05em;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s cubic-bezier(0.22, 0.61, 0.36, 1) 1.3s forwards;
}

.explore-btn svg {
    transform: rotate(90deg) translateX(3px);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.explore-btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: translateY(-4px);
    box-shadow: 0 2px 12px rgba(255, 255, 255, 0.3);
}

.explore-btn:hover svg {
    transform: rotate(90deg) translateX(6px);
}

.explore-btn:active {
    transform: translateY(-4px);
}

#star-info {
    position: absolute;
    background: linear-gradient(135deg,
        rgba(0, 0, 0, 0.95) 0%,
        rgba(20, 20, 30, 0.92) 100%);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    padding: 0;
    font-family: "Inter", sans-serif;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
    z-index: 100;
    min-width: 240px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

#star-info.visible {
    opacity: 1;
}

#star-info h3 {
    font-size: 16px;
    font-weight: 500;
    margin: 0;
    padding: 16px 20px;
    letter-spacing: -0.01em;
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    line-height: 1.3;
}

#star-info .info-content {
    padding: 14px 20px;
}

#star-info .info-row {
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 12px;
    margin-bottom: 9px;
    font-size: 13px;
    align-items: baseline;
}

#star-info .info-row:last-child {
    margin-bottom: 0;
}

#star-info .info-label {
    opacity: 0.6;
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 0.01em;
}

#star-info .info-value {
    font-weight: 500;
    opacity: 0.95;
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    letter-spacing: -0.01em;
}

#star-info .color-indicator {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    flex-shrink: 0;
}

#loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 18px;
    text-align: center;
}

.spinner {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid #667eea;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#debug-panel {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 16px;
    font-family: "Inter", sans-serif;
    font-size: 12px;
    z-index: 1000;
    min-width: 320px;
    max-height: 80vh;
    overflow-y: auto;
}

#debug-panel h3 {
    margin: 0 0 12px 0;
    font-size: 14px;
    font-weight: 600;
    opacity: 0.9;
}

.debug-control {
    margin-bottom: 12px;
}

.debug-control label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
    opacity: 0.8;
    font-size: 11px;
}

.debug-control input[type="range"] {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
}

.debug-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: #667eea;
    cursor: pointer;
    border-radius: 50%;
}

.debug-control input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: #667eea;
    cursor: pointer;
    border-radius: 50%;
    border: none;
}

.debug-section {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.debug-section:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.debug-section h4 {
    margin: 0 0 10px 0;
    font-size: 12px;
    font-weight: 500;
    opacity: 0.7;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Entry Animation */
#entry-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at 50% 20%, rgba(12, 14, 20, 0.72) 0%, rgba(4, 5, 10, 0.94) 58%, rgba(0, 0, 0, 1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    pointer-events: none;
    overflow: hidden;
    transition: opacity 0.8s cubic-bezier(0.55, 0.06, 0.35, 1);
}

#entry-overlay::before {
    content: '';
    position: absolute;
    inset: -120%;
    background:
        radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0) 40%),
        radial-gradient(circle at 80% 30%, rgba(129, 140, 248, 0.12) 0%, rgba(129, 140, 248, 0) 32%),
        radial-gradient(circle at 50% 80%, rgba(56, 189, 248, 0.08) 0%, rgba(56, 189, 248, 0) 30%);
    opacity: 0;
    transform: translate3d(0, 22%, 0) scale(0.92);
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

#entry-overlay.is-active::before {
    opacity: 0.55;
    transform: translate3d(0, 0, 0) scale(1);
}

#entry-overlay::after {
    content: '';
    position: absolute;
    inset: -100%;
    background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
    background-size: 120px 120px;
    opacity: 0;
    transform: translateY(6%);
    animation: starDrift 18s linear infinite;
}

#entry-overlay.is-active::after {
    opacity: 0.25;
}

.overlay-inner {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 22px;
    text-align: center;
    max-width: min(620px, 90vw);
    padding: 0 32px;
    z-index: 1;
    font-family: 'Baskervville', serif;
    color: rgba(255, 255, 255, 0.6);
}

#entry-subtitle {
    font-size: clamp(1.05rem, 2.1vw, 1.4rem);
    line-height: 1.9;
    letter-spacing: 0.01em;
    opacity: 0;
    transform: translateY(30px);
    animation: flowInSubtle 1.2s cubic-bezier(0.42, 0, 1, 1) forwards;
    animation-play-state: paused;
}

#entry-subtitle.is-visible {
    animation-play-state: running;
}

#entry-title {
    font-size: clamp(2.6rem, 4.6vw, 3.8rem);
    font-weight: 400;
    line-height: 1.2;
    color: #ffffff;
    opacity: 0;
    transform: translateY(40px);
    animation: flowInBold 1.2s cubic-bezier(0.42, 0, 1, 1) forwards;
    animation-play-state: paused;
    animation-delay: 0.2s;
}

#entry-title.is-visible {
    animation-play-state: running;
}

@keyframes flowInSubtle {
    to {
        opacity: 0.6;
        transform: translateY(0);
    }
}

@keyframes flowInBold {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#entry-overlay.is-exiting {
    animation: overlayFadeAway 0.9s cubic-bezier(0.55, 0.08, 0.35, 1) forwards;
}

@keyframes overlayFadeAway {
    to {
        opacity: 0;
        transform: scale(1.02);
    }
}

@keyframes starDrift {
    from {
        transform: translateY(6%);
    }
    to {
        transform: translateY(-6%);
    }
}

@media (max-width: 768px) {
    .overlay-inner {
        gap: 18px;
    }
    #entry-title {
        font-size: clamp(2.2rem, 7vw, 3.1rem);
    }
}

@media (max-width: 480px) {
    .overlay-inner {
        gap: 14px;
        padding: 0 20px;
    }
    #entry-subtitle {
        font-size: clamp(0.95rem, 3.6vw, 1.1rem);
        line-height: 1.7;
    }
}