:root {
    --primary-bg: #0a0d14;
    --secondary-bg: #1a1f2c;
    --border-color: #2a324d;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --accent-color: #4f46e5;
    --accent-glow: rgba(79, 70, 229, 0.2);
    --loading-primary: #4f46e5;
    --loading-secondary: #2a324d;
    --link-color: #60a5fa;
}

html, body {
    overflow: hidden;
    height: 100%;
    width: 100%;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--primary-bg);
}

#main-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

#iframe-container {
    flex: 1;
    position: relative;
}

#main-iframe {
    width: 100%;
    height: 100%;
    border: none;
}

#error-screen {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--secondary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.error-content {
    padding: 2rem;
    max-width: 600px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
    transition-delay: 0.4s;
}

.error-content h2 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.error-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.error-content a {
    color: var(--link-color);
    text-decoration: none;
}

.error-content a:hover {
    text-decoration: underline;
}

.error-content .info-section {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.error-content ul {
    list-style-type: none;
    padding-left: 0;
    margin-top: 1rem;
}

.error-content li {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.error-screen {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.error-screen.visible {
    opacity: 1;
    transform: translateY(0);
}

.error-screen.visible .error-content {
    opacity: 1;
    transform: translateY(0);
}

#backup-chat {
    width: 400px;
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1), width 0.3s ease-in-out;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#backup-chat.visible {
    transform: translateX(0);
    opacity: 1;
}

#backup-chat.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    border: none;
    background-color: var(--primary-bg);
    transform: none;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

#backup-chat.transitioning {
    transition: all 0.3s ease-in-out;
}

#backup-chat .chat-header {
    position: relative;
}

#backup-chat .fullscreen-button,
#backup-chat .close-button {
    position: absolute;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 5px;
    transition: color 0.2s ease;
}

#backup-chat .fullscreen-button:hover,
#backup-chat .close-button:hover {
    color: var(--text-primary);
}

.chat-header h3 {
    color: var(--text-primary);
}

.close-button {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 5px;
    opacity: 0;
    transition: opacity 0.3s ease, color 0.2s ease;
}

.fullscreen .close-button {
    opacity: 1;
}

.close-button:hover {
    color: var(--text-primary);
}

.fullscreen-button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 5px;
}

.fullscreen-button:hover {
    color: var(--text-primary);
}

#chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    height: 0; 
}

.message {
    margin-bottom: 1rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
    max-width: 80%;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.user-message {
    background-color: var(--accent-color);
    color: white;
    margin-left: auto;
}

.assistant-message {
    background-color: var(--secondary-bg);
    color: var(--text-primary);
}

.chat-input-container {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--primary-bg);
}

#chat-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    resize: none;
    margin-bottom: 0.5rem;
}

#send-message {
    width: 100%;
    padding: 0.75rem;
    background: linear-gradient(145deg, var(--accent-color), #4338ca);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
    transition: all 0.3s ease;
    color: white;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 500;
}

#send-message:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(79, 70, 229, 0.3);
}

.hidden {
    display: none !important;
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--primary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    z-index: 1000;
    transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.loading-overlay.finished {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 120px; 
    height: 120px;
    position: relative;
    transition: all 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(0 0 15px var(--accent-glow));
}

.loading-spinner::before,
.loading-spinner::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

.loading-spinner::before {
    border: 6px solid var(--loading-primary);
    border-bottom: 6px solid transparent;
    animation: spin 2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    clip-path: ellipse(50% 35% at 50% 50%);
}

.loading-spinner::after {
    border: 6px solid var(--loading-secondary);
    border-top: 6px solid transparent;
    animation: spin-reverse 3s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    clip-path: ellipse(50% 65% at 50% 50%);
}

.loading-spinner .inner-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40%;
    height: 40%;
    background: var(--accent-glow);
    border-radius: 50%;
    box-shadow: 0 0 30px var(--accent-glow);
    animation: pupil-glow 3s ease-in-out infinite;
}

.orbital-ring {
    position: absolute;
    border: 2px solid transparent;
    border-radius: 50%;
    width: 100%;
    height: 100%;
    opacity: 0.4;
}

.ring-1 {
    animation: orbit 4s linear infinite, glow 2s ease-in-out infinite;
    border-top-color: var(--loading-primary);
    transform: rotate(120deg);
}

.ring-2 {
    animation: orbit 6s linear infinite reverse, glow 3s ease-in-out infinite;
    border-right-color: var(--loading-secondary);
    width: 80%;
    height: 80%;
    top: 10%;
    left: 10%;
}

.ring-3 {
    animation: orbit 8s linear infinite, glow 4s ease-in-out infinite;
    border-bottom-color: var(--accent-color);
    width: 60%;
    height: 60%;
    top: 20%;
    left: 20%;
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    animation: rotate 20s linear infinite;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-glow);
    border-radius: 50%;
    animation: particle-float 4s ease-in-out infinite;
}

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

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

@keyframes pupil-glow {
    0%, 100% { 
        transform: translate(-50%, -50%) scale(0.8);
        opacity: 0.7; 
    }
    50% { 
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 1; 
    }
}

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

@keyframes glow {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}

@keyframes particle-float {
    0%, 100% { transform: scale(1) translate(0, 0); opacity: 0.3; }
    50% { transform: scale(1.5) translate(10px, -10px); opacity: 0.7; }
}

.loading-overlay.finished .loading-spinner {
    transform: scale(30);
    opacity: 0;
    transition: all 1.8s cubic-bezier(0.4, 0, 0.2, 1);
}

#server-selection {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(17, 24, 39, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#server-selection.visible {
    opacity: 1;
}

.selection-content {
    max-width: 900px;
    padding: 2rem;
    color: var(--text-primary);
}

.selection-content h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.8rem;
    opacity: 0;
    transform: translateY(-20px);
    animation: fadeInDown 0.5s forwards;
}

.server-options {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.server-option {
    background: linear-gradient(145deg, var(--secondary-bg), var(--primary-bg));
    box-shadow: 0 4px 20px rgba(79, 70, 229, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    width: 400px;
    transition: transform 0.2s ease, border-color 0.2s ease;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s forwards;
}

#pi-server {
    animation-delay: 0.2s;
}

#websim {
    animation-delay: 0.4s;
}

.server-option:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(79, 70, 229, 0.2);
}

.server-option h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
}

.pros-cons {
    margin-bottom: 1.5rem;
}

.pros h4, .cons h4 {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.pros ul, .cons ul {
    list-style: none;
    margin-bottom: 1rem;
}

.pros li, .cons li {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.select-button {
    width: 100%;
    padding: 0.75rem;
    background: linear-gradient(145deg, var(--accent-color), #4338ca);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
    transition: all 0.3s ease;
    color: white;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 500;
}

.select-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(79, 70, 229, 0.3);
}

.notice-box {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
    border: 1px solid var(--border-color);
}

.notice-box h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.notice-box ul {
    color: var(--text-secondary);
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

#music-controls {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(17, 24, 39, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#music-controls.visible {
    opacity: 1;
}

.music-overlay {
    background-color: var(--secondary-bg);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    max-width: 400px;
    width: 90%;
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.5s ease;
}

#music-controls.visible .music-overlay {
    transform: translateY(0);
    opacity: 1;
}

.music-overlay h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.music-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

.volume-control {
    margin-bottom: 1.5rem;
}

#volume-slider {
    width: 100%;
    height: 4px;
    background: var(--border-color);
    outline: none;
    opacity: 0.7;
    transition: opacity .2s;
    -webkit-appearance: none;
}

#volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
}

.continue-button {
    background: linear-gradient(145deg, var(--accent-color), #4338ca);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
    transition: all 0.3s ease;
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 500;
}

.continue-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(79, 70, 229, 0.3);
}

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

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

.signup-note {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.signup-notice {
    background-color: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 6px;
    padding: 0.5rem;
    margin: 0.5rem 0 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.signup-notice p {
    margin: 0;
}

.entrance-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-bg);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    transform-origin: center;
    overflow: hidden;
}

.entrance-overlay::before,
.entrance-overlay::after {
    content: '';
    position: absolute;
    width: 300vw;
    height: 300vh;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(0deg);
    background: linear-gradient(45deg, var(--accent-color) 0%, transparent 80%);
    opacity: 0.05;
    animation: entrance-rotate 2.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.entrance-overlay::after {
    animation-delay: 0.3s;
    animation-direction: reverse;
    background: linear-gradient(-45deg, var(--accent-glow) 0%, transparent 80%);
}

.entrance-ring {
    position: absolute;
    width: 120px;
    height: 120px;
    border: 4px solid transparent;
    border-radius: 50%;
    animation: entrance-pulse 2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.entrance-ring:nth-child(1) {
    border-left-color: var(--accent-color);
    animation-delay: 0.2s;
    transform: rotate(30deg);
}

.entrance-ring:nth-child(2) {
    border-right-color: var(--accent-color);
    animation-delay: 0.5s;
    transform: rotate(-30deg);
}

.entrance-ring:nth-child(3) {
    border-top-color: var(--accent-color);
    animation-delay: 0.8s;
    transform: rotate(15deg);
}

.entrance-particles {
    position: absolute;
    width: 200px;
    height: 200px;
    animation: entrance-particle-container 3s linear infinite;
}

.entrance-particles::before {
    content: '';
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-glow);
    border-radius: 50%;
    box-shadow: 
        0 0 15px var(--accent-glow),
        40px 40px 0 -1px var(--accent-glow),
        -40px -40px 0 -1px var(--accent-glow),
        40px -40px 0 -1px var(--accent-glow),
        -40px 40px 0 -1px var(--accent-glow);
    animation: entrance-particle-pulse 2s ease-in-out infinite;
}

.entrance-core {
    position: absolute;
    width: 60px;
    height: 60px;
    animation: entrance-core-appear 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    opacity: 0;
}

.entrance-pupil {
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--accent-glow);
    border-radius: 50%;
    transform: scale(0);
    animation: entrance-pupil-appear 1.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    animation-delay: 0.5s;
    box-shadow: 0 0 30px var(--accent-glow);
}

.entrance-iris {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid var(--accent-color);
    border-radius: 50%;
    transform: scale(0) rotate(0deg);
    animation: entrance-iris-appear 1.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    animation-delay: 0.3s;
}

@keyframes entrance-rotate {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
        opacity: 0;
    }
    50% {
        opacity: 0.08;
    }
    100% {
        transform: translate(-50%, -50%) rotate(180deg);
        opacity: 0;
    }
}

@keyframes entrance-pulse {
    0% {
        transform: scale(0.3) rotate(0deg);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: scale(2) rotate(360deg);
        opacity: 0;
    }
}

@keyframes entrance-particle-container {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes entrance-particle-pulse {
    0%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.2);
        opacity: 1;
    }
}

@keyframes entrance-core-appear {
    0% {
        opacity: 0;
        transform: scale(0.5);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes entrance-pupil-appear {
    0% {
        transform: scale(0);
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes entrance-iris-appear {
    0% {
        transform: scale(0) rotate(0deg);
    }
    50% {
        transform: scale(1.3) rotate(180deg);
    }
    100% {
        transform: scale(1) rotate(360deg);
    }
}

.entrance-overlay.fade-out {
    animation: entrance-fade 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes entrance-fade {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(1.2);
        visibility: hidden;
    }
}