@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap');

* {
    box-sizing: border-box;
    font-family: 'Share Tech Mono', monospace ;
}

html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    background: #050505;
    color: white;
}

.desktop {
    position: fixed;
    inset: 0;
    z-index: 0;

    background-image:
        linear-gradient(
            rgba(0, 0, 0, 0.18),
            rgba(0, 0, 0, 0.35)
        ),
        url("Pictures/background1.jpg");

    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.topbar {
    position: fixed;
    top: -1px;
    left: -1px;
    right: 0px;

    height: 65px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 0 24px;

    background: rgba(4, 4, 4, 0.90);

    border: 1px solid rgba(255, 20, 20, 0.95);
    border-radius: 0px;

    box-shadow:
        0 0 6px rgba(255, 0, 0, 0.9),
        0 0 18px rgba(255, 0, 0, 0.7),
        0 0 40px rgba(255, 0, 0, 0.35),
        inset 0 0 20px rgba(255, 0, 0, 0.08);

    z-index: 10000;
}

.topbar::before {
    content: "";

    position: absolute;
    inset: -1px;

    border-radius: 0px;

    pointer-events: none;

    box-shadow:
        0 0 12px rgba(255, 0, 0, 0.8),
        0 0 35px rgba(255, 0, 0, 0.3);
}

.topbar-left,
.topbar-right {
    display: flex;
    align-items: center;
    gap: 52px;
}

.os-link {
    text-decoration: none;
}

.os-button,
.nav-button,
.power-button {
    border: none;
    color: white;
    background: transparent;
    cursor: pointer;
}

.os-button {
    height: 54px;

    display: flex;
    align-items: center;
    gap: 12px;

    padding: 0 14px;

    color: #ff2020;

    font-size: 20px;
    font-weight: bold;

    border-radius: 10px;
}

.os-button:hover,
.nav-button:hover {
    background: rgba(255, 0, 0, 0.08);
    text-shadow: 0 0 10px #ff0000;
}

.logo {
    width: 42px;
    height: 42px;

    display: flex;
    align-items: center;
    justify-content: center;

    border: 1px solid #ff1c1c;
    border-radius: 10px;

    color: #ff2020;

    box-shadow:
        0 0 7px rgba(255, 0, 0, 0.8),
        inset 0 0 10px rgba(255, 0, 0, 0.12);
}

.nav-button {
    height: 54px;

    padding: 0 18px;

    border-radius: 9px;

    color: #d0d0d0;

    font-size: 18px;
}

.system-title {
    color: #ff2222;

    font-size: 22px;
    font-weight: bold;
    letter-spacing: 5px;

    text-shadow:
        0 0 5px #ff0000,
        0 0 15px rgba(255, 0, 0, 0.8);
}

.status {
    display: flex;
    align-items: center;
    gap: 8px;

    color: #d5d5d5;
    font-size: 16px;
}

.status-dot {
    width: 9px;
    height: 9px;

    border-radius: 50%;

    background: #ff2020;

    box-shadow:
        0 0 5px #ff0000,
        0 0 12px #ff0000;
}

.time {
    min-width: 62px;

    color: #ff2020;

    font-size: 20px;
    font-weight: bold;

    text-shadow: 0 0 10px rgba(255, 0, 0, 0.8);
}

.power-button {
    width: 50px;
    height: 50px;

    border: 1px solid #333;
    border-radius: 11px;

    background: rgba(30, 30, 30, 0.8);

    color: #ff2020;

    font-size: 20px;

    transition: 0.2s;
}

.power-button:hover {
    border-color: #ff2020;

    background: rgba(255, 0, 0, 0.1);

    box-shadow:
        0 0 10px rgba(255, 0, 0, 0.6),
        inset 0 0 10px rgba(255, 0, 0, 0.1);
}

.desktop-content {
    position: fixed;
    inset: 0;

    z-index: 100;
}

.window {
    position: absolute;

    left: 180px;
    top: 180px;

    width: 600px;
    height: 380px;

    overflow: hidden;

    background: rgba(12, 12, 12, 0.96);

    border: 1px solid rgba(255, 30, 30, 0.8);

    border-radius: 14px;

    box-shadow:
        0 0 8px rgba(255, 0, 0, 0.45),
        0 15px 50px rgba(0, 0, 0, 0.7);

    z-index: 10;

    transition:
        box-shadow 0.2s,
        opacity 0.2s,
        transform 0.2s;
}

.window.active {
    box-shadow:
        0 0 8px rgba(255, 0, 0, 0.7),
        0 0 25px rgba(255, 0, 0, 0.25),
        0 20px 60px rgba(0, 0, 0, 0.8);
}

.window.maximized {
    left: 28px !important;
    top: 140px !important;

    width: calc(100vw - 56px) !important;
    height: calc(100vh - 168px) !important;
}

.window.minimized {
    height: 43px;
}

.window.minimized .window-content {
    display: none;
}

.window-header {
    width: 100%;
    height: 43px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 0 8px 0 13px;

    background: rgba(20, 20, 20, 0.98);

    border-bottom: 1px solid rgba(255, 30, 30, 0.35);

    cursor: grab;

    user-select: none;
    touch-action: none;
}

.window-header:active {
    cursor: grabbing;
}

.window-title {
    display: flex;
    align-items: center;
    gap: 9px;

    color: #eee;

    font-size: 14px;
    font-weight: bold;
}

.window-icon {
    width: 25px;
    height: 25px;

    display: flex;
    align-items: center;
    justify-content: center;

    border: 1px solid #ff2020;
    border-radius: 6px;

    color: #ff2020;

    font-size: 13px;

    box-shadow: 0 0 7px rgba(255, 0, 0, 0.5);
}

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

.window-button {
    width: 31px;
    height: 29px;

    display: flex;
    align-items: center;
    justify-content: center;

    border: none;
    border-radius: 6px;

    background: transparent;

    color: #bbb;

    font-size: 17px;

    cursor: pointer;
}

.window-button:hover {
    background: rgba(255, 255, 255, 0.08);
    color: white;
}

.window-button.close:hover {
    background: #d71919;
    color: white;

    box-shadow: 0 0 12px rgba(255, 0, 0, 0.5);
}

.window-content {
    height: calc(100% - 43px);

    padding: 30px;

    overflow: auto;

    background:
        radial-gradient(
            circle at top right,
            rgba(255, 0, 0, 0.08),
            transparent 40%
        );
}

.window-content h1 {
    margin: 0 0 12px;

    color: #ff2929;

    font-size: 28px;

    text-shadow: 0 0 12px rgba(255, 0, 0, 0.5);
}

.window-content p {
    color: #aaa;
    font-size: 15px;
}

@media (max-width: 800px) {

    .topbar {
        left: 12px;
        right: 12px;
        top: 12px;
        height: 70px;
        padding: 0 10px;
    }

    .nav-button {
        display: none;
    }

    .system-title {
        font-size: 15px;
    }

    .status {
        display: none;
    }

    .os-button {
        font-size: 15px;
    }

    .logo {
        width: 34px;
        height: 34px;
    }

    .power-button {
        width: 42px;
        height: 42px;
    }

    .window {
        left: 20px;
        top: 110px;

        width: calc(100vw - 40px);
        height: 350px;
    }
} 
.calculator {
    width: 100%;
    max-width: 430px;
    margin: 0 auto;
}

.calculator-display {
    width: 100%;
    height: 85px;

    display: flex;
    align-items: flex-end;
    justify-content: flex-end;

    padding: 12px 18px;

    background: #080808;

    border: 1px solid #3a3a3a;
    border-radius: 10px;

    color: #ff2020;

    font-size: 36px;
    font-weight: bold;

    overflow: hidden;

    box-shadow:
        inset 0 0 15px rgba(255, 0, 0, 0.08),
        0 0 8px rgba(255, 0, 0, 0.12);

    text-shadow:
        0 0 8px rgba(255, 0, 0, 0.7);
}

.calculator-buttons {
    display: grid;

    grid-template-columns: repeat(4, 1fr);

    gap: 9px;

    margin-top: 14px;
}

.calc-button {
    height: 58px;

    border: 1px solid #333;
    border-radius: 9px;

    background: #181818;

    color: #ddd;

    font-size: 19px;
    font-weight: bold;

    cursor: pointer;

    transition:
        background 0.12s,
        border-color 0.12s,
        box-shadow 0.12s,
        transform 0.08s;
}

.calc-button:hover {
    background: #242424;

    border-color: #ff2020;

    color: white;

    box-shadow:
        0 0 8px rgba(255, 0, 0, 0.35),
        inset 0 0 8px rgba(255, 0, 0, 0.05);
}

.calc-button:active {
    transform: scale(0.96);
}

.calc-button.operator {
    color: #ff2020;

    border-color: rgba(255, 30, 30, 0.35);
}

.calc-button.operator:hover {
    background: rgba(255, 0, 0, 0.12);

    box-shadow:
        0 0 12px rgba(255, 0, 0, 0.5);
}

.calc-button.clear {
    color: #ff5555;
}

.calc-button.equals {
    background: #b41414;

    border-color: #ff2525;

    color: white;

    box-shadow:
        0 0 8px rgba(255, 0, 0, 0.35);
}

.calc-button.equals:hover {
    background: #d01818;

    box-shadow:
        0 0 15px rgba(255, 0, 0, 0.7);
}

.calc-button.zero {
    grid-column: span 2;
}