* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.os-desktop {
    position: relative;
    width: 100vw;
    height: 100vh;
    background: #1a1a2e url('../../img/os-demo/backgrounds/whiteeye.jpg') center/cover no-repeat;
    cursor: none;
}

.os-cursor {
    position: fixed;
    width: 20px;
    height: 20px;
    pointer-events: none;
    z-index: 10000;
    transform: translate(-2px, -2px);
    background: url('../../img/os-demo/icons/24/mouse-relative.png') center/contain no-repeat;
    transition: transform 0.05s linear;
}

.os-cursor.clicking {
    transform: translate(-2px, -2px) scale(0.9);
}

.desktop-icons {
    position: absolute;
    top: 24px;
    left: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 10;
}

.desktop-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: none;
    width: 88px;
    text-align: center;
    transition: background 0.15s;
}

.desktop-icon:hover,
.desktop-icon.selected {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(4px);
}

.desktop-icon img {
    width: 48px;
    height: 48px;
    image-rendering: pixelated;
}

.desktop-icon span {
    color: #fff;
    font-size: 0.72rem;
    text-shadow: 0 1px 3px rgba(0,0,0,0.8);
    line-height: 1.2;
    word-break: break-word;
}

.os-window {
    position: absolute;
    min-width: 320px;
    min-height: 200px;
    background: #f0f0f0;
    border-radius: 8px 8px 0 0;
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 100;
    resize: both;
}

.os-window.focused {
    z-index: 200;
    box-shadow: 0 12px 40px rgba(0,0,0,0.5);
}

.window-titlebar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(180deg, #e8e8e8, #d4d4d4);
    padding: 6px 8px;
    cursor: none;
    border-bottom: 1px solid #bbb;
    flex-shrink: 0;
}

.window-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    color: #333;
    flex: 1;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.window-title img {
    width: 16px;
    height: 16px;
}

.window-controls {
    display: flex;
    gap: 4px;
}

.window-btn {
    width: 22px;
    height: 22px;
    border: 1px solid #aaa;
    border-radius: 4px;
    background: linear-gradient(180deg, #f8f8f8, #e0e0e0);
    cursor: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    color: #555;
}

.window-btn:hover {
    background: linear-gradient(180deg, #fff, #eee);
}

.window-btn.close:hover {
    background: #e81123;
    color: #fff;
    border-color: #c50f1f;
}

.window-content {
    flex: 1;
    padding: 16px;
    overflow: auto;
    background: #fff;
    font-size: 0.85rem;
    color: #333;
    cursor: none;
}

.window-content.terminal {
    background: #0c0c0c;
    color: #33ff33;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 0.8rem;
    line-height: 1.5;
}

.window-content.calculator {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    padding: 12px;
    background: #2d2d2d;
}

.calc-display {
    grid-column: 1 / -1;
    background: #1a1a1a;
    color: #fff;
    padding: 12px;
    text-align: right;
    font-size: 1.4rem;
    border-radius: 4px;
    margin-bottom: 4px;
    font-family: monospace;
}

.calc-btn {
    padding: 14px;
    border: none;
    border-radius: 4px;
    background: #4a4a4a;
    color: #fff;
    font-size: 1rem;
    cursor: none;
}

.calc-btn:hover {
    background: #5a5a5a;
}

.calc-btn.operator {
    background: #f5923e;
}

.calc-btn.equals {
    background: #4caf50;
}

.taskbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 44px;
    background: rgba(30, 30, 46, 0.92);
    backdrop-filter: blur(12px);
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    padding: 0 8px;
    gap: 6px;
    z-index: 5000;
}

.start-btn {
    width: 40px;
    height: 36px;
    border: none;
    border-radius: 6px;
    background: transparent;
    cursor: none;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
}

.start-btn:hover,
.start-btn.active {
    background: rgba(255,255,255,0.12);
}

.start-btn img {
    width: 28px;
    height: 28px;
}

.taskbar-apps {
    display: flex;
    gap: 4px;
    flex: 1;
    overflow-x: auto;
}

.taskbar-app {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 6px;
    background: rgba(255,255,255,0.08);
    cursor: none;
    font-size: 0.75rem;
    color: #ccc;
    white-space: nowrap;
    max-width: 160px;
    overflow: hidden;
}

.taskbar-app:hover,
.taskbar-app.active {
    background: rgba(255,255,255,0.18);
    color: #fff;
}

.taskbar-app img {
    width: 20px;
    height: 20px;
}

.taskbar-tray {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 8px;
}

.tray-icon {
    width: 22px;
    height: 22px;
    opacity: 0.85;
}

.taskbar-clock {
    color: #ddd;
    font-size: 0.75rem;
    text-align: right;
    padding: 0 8px;
    line-height: 1.3;
    cursor: none;
}

.start-menu {
    position: fixed;
    bottom: 52px;
    left: 8px;
    width: 280px;
    background: rgba(30, 30, 46, 0.95);
    backdrop-filter: blur(16px);
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.1);
    padding: 12px;
    z-index: 6000;
    display: none;
    box-shadow: 0 -8px 32px rgba(0,0,0,0.4);
}

.start-menu.open {
    display: block;
}

.start-menu-header {
    padding: 12px 8px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 8px;
}

.start-menu-header h3 {
    color: #fff;
    font-size: 0.9rem;
}

.start-menu-header p {
    color: #888;
    font-size: 0.72rem;
}

.start-menu-items {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
}

.start-menu-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 8px;
    border-radius: 8px;
    cursor: none;
    transition: background 0.15s;
}

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

.start-menu-item img {
    width: 32px;
    height: 32px;
}

.start-menu-item span {
    color: #ccc;
    font-size: 0.7rem;
    text-align: center;
}

.start-menu-footer {
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: 8px;
    padding-top: 8px;
    display: flex;
    justify-content: space-between;
}

.start-menu-footer a,
.start-menu-footer button {
    background: none;
    border: none;
    color: #aaa;
    font-size: 0.75rem;
    cursor: none;
    padding: 8px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

.start-menu-footer a:hover,
.start-menu-footer button:hover {
    color: #fff;
}

.back-link {
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 9000;
    background: rgba(0,0,0,0.5);
    color: #fff;
    padding: 8px 16px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.8rem;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.15);
    cursor: none;
}

.back-link:hover {
    background: rgba(0,0,0,0.7);
}