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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #000;
    color: #fff;
    overflow: hidden;
    height: 100vh;
}

.screen {
    width: 100vw;
    height: 100vh;
    position: absolute;
    top: 0;
    left: 0;
}

.hidden {
    display: none;
}

/* Startup Screen */
#startup-screen {
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.startup-content {
    text-align: center;
}

.windows-logo {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
}

.startup-content h1 {
    font-size: 48px;
    font-weight: 300;
    margin-bottom: 20px;
}

.startup-text {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.8;
}

/* Loading Circle Animation */
.loading-circle {
    position: relative;
    width: 60px;
    height: 60px;
    margin: 0 auto;
}

.loading-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    background: #fff;
    border-radius: 50%;
    animation: loading 1.5s infinite ease-in-out;
}

.dot-1 { top: 0; left: 26px; animation-delay: 0s; }
.dot-2 { top: 13px; left: 45px; animation-delay: 0.25s; }
.dot-3 { top: 39px; left: 45px; animation-delay: 0.5s; }
.dot-4 { top: 52px; left: 26px; animation-delay: 0.75s; }
.dot-5 { top: 39px; left: 7px; animation-delay: 1s; }
.dot-6 { top: 13px; left: 7px; animation-delay: 1.25s; }

@keyframes loading {
    0%, 80%, 100% { opacity: 0.3; }
    40% { opacity: 1; }
}

/* Mode Selection */
.mode-selection {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 40px;
}

.mode-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    padding: 20px 30px;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 300px;
}

.mode-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.mode-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 8px;
}

.mode-subtitle {
    font-size: 14px;
    opacity: 0.8;
}

/* Desktop */
#desktop {
    background: url('/windows13image.png') center/cover no-repeat;
    position: relative;
}

.taskbar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 48px;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    padding: 0 12px;
    z-index: 1000;
}

.start-button {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.2s;
}

.start-button:hover {
    background: rgba(255, 255, 255, 0.1);
}

.start-icon {
    width: 20px;
    height: 20px;
}

.taskbar-apps {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 0 12px;
}

.taskbar-right {
    display: flex;
    align-items: center;
}

#clock {
    font-size: 14px;
    padding: 8px;
}

/* Desktop Icons */
.desktop-icons {
    position: absolute;
    top: 20px;
    left: 20px;
    display: grid;
    grid-template-columns: repeat(5, 80px);
    gap: 20px;
    z-index: 10;
}

.icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.2s;
    text-align: center;
}

.icon:hover {
    background: rgba(255, 255, 255, 0.1);
}

.icon img {
    width: 48px;
    height: 48px;
    margin-bottom: 8px;
}

.icon span {
    font-size: 12px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* Start Menu */
.start-menu {
    position: absolute;
    bottom: 48px;
    left: 0;
    width: 350px;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(20px);
    border-radius: 8px 8px 0 0;
    padding: 20px;
    z-index: 1001;
}

.start-menu-content {
    color: #fff;
}

.menu-section {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.menu-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.menu-section h3 {
    font-size: 16px;
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.8);
}

.menu-item {
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.2s;
    margin-bottom: 4px;
}

.menu-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.mode-display {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    padding: 10px;
}

.player-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
}

.player-label {
    font-size: 14px;
    opacity: 0.8;
}

.player-name {
    font-weight: 600;
}