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

body {
    background: #008080 url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="4" height="4"><rect width="2" height="2" fill="%23006666"/><rect x="2" y="2" width="2" height="2" fill="%23006666"/></svg>');
    font-family: "MS Sans Serif", "Microsoft Sans Serif", Tahoma, sans-serif;
    font-size: 11px;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.retro-window {
    background: #c0c0c0;
    border: 2px solid;
    border-color: #dfdfdf #808080 #808080 #dfdfdf;
    box-shadow: 1px 1px 0 #ffffff inset, 2px 2px 0 #dfdfdf inset, 1px 1px 0 #000000, 2px 2px 0 #808080;
    max-width: 600px;
    width: 100%;
    font-family: inherit;
}

.window-title {
    background: linear-gradient(90deg, #000080 0%, #1084d7 100%);
    color: white;
    padding: 2px 2px 2px 4px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 20px;
    font-weight: bold;
    font-size: 11px;
    user-select: none;
}

.title-text {
    flex: 1;
}

.title-buttons {
    display: flex;
    gap: 2px;
}

.title-btn {
    width: 16px;
    height: 14px;
    padding: 0;
    border: 1px solid;
    border-color: #dfdfdf #000000 #000000 #dfdfdf;
    background: #c0c0c0;
    color: black;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-weight: bold;
}

.title-btn:active {
    border-color: #000000 #dfdfdf #dfdfdf #000000;
}

.window-contents {
    padding: 4px;
    background: #c0c0c0;
}

.retro-fieldset {
    border: 2px solid;
    border-color: #dfdfdf #808080 #808080 #dfdfdf;
    padding: 8px;
    margin-bottom: 8px;
    background: #c0c0c0;
}

.retro-fieldset legend {
    background: #c0c0c0;
    padding: 2px 4px;
    font-weight: bold;
    color: #000;
}

.countdown-input-section,
.preset-dates-section,
.countdown-display-section {
    margin-bottom: 8px;
}

.input-group {
    margin-bottom: 8px;
}

.input-group label {
    display: block;
    margin-bottom: 4px;
    font-weight: bold;
}

.retro-input {
    width: 100%;
    padding: 3px 4px;
    border: 2px solid;
    border-color: #808080 #dfdfdf #dfdfdf #808080;
    background: white;
    color: black;
    font-family: inherit;
    font-size: 11px;
}

.retro-input:focus {
    outline: 1px dotted #000;
    outline-offset: -4px;
}

.button-group {
    display: flex;
    gap: 4px;
    margin-top: 8px;
    justify-content: flex-end;
}

.retro-button {
    padding: 4px 12px;
    border: 2px solid;
    border-color: #dfdfdf #808080 #808080 #dfdfdf;
    background: #c0c0c0;
    color: black;
    font-family: inherit;
    font-size: 11px;
    font-weight: bold;
    cursor: pointer;
    min-width: 75px;
}

.retro-button:hover {
    border-color: #ffffff #000000 #000000 #ffffff;
}

.retro-button:active {
    border-color: #808080 #dfdfdf #dfdfdf #808080;
    box-shadow: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #000000;
}

.preset-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 4px;
}

.preset-btn {
    padding: 4px 8px;
    border: 2px solid;
    border-color: #dfdfdf #808080 #808080 #dfdfdf;
    background: #c0c0c0;
    color: black;
    font-family: inherit;
    font-size: 11px;
    cursor: pointer;
    text-align: center;
    font-weight: bold;
}

.preset-btn:hover {
    border-color: #ffffff #000000 #000000 #ffffff;
}

.preset-btn:active {
    border-color: #808080 #dfdfdf #dfdfdf #808080;
    box-shadow: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #000000;
}

.countdown-timer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin: 16px 0;
    flex-wrap: wrap;
}

.time-unit {
    text-align: center;
    background: #c0c0c0;
}

.time-display {
    background: white;
    border: 2px solid;
    border-color: #808080 #dfdfdf #dfdfdf #808080;
    padding: 8px 12px;
    min-width: 60px;
    margin-bottom: 4px;
}

.time-unit span {
    display: block;
    font-size: 28px;
    font-weight: bold;
    color: #000;
    font-family: "Courier New", monospace;
    letter-spacing: 2px;
}

.time-unit label {
    font-size: 10px;
    font-weight: bold;
    color: #000;
}

.separator {
    font-size: 24px;
    font-weight: bold;
    color: #000;
    margin-bottom: 16px;
    height: 30px;
    display: flex;
    align-items: flex-start;
}

.window-status-bar {
    background: linear-gradient(90deg, #c0c0c0 0%, #c0c0c0 100%);
    border-top: 1px solid #dfdfdf;
    padding: 2px 2px;
    display: flex;
}

.status-text {
    padding: 2px 4px;
    font-size: 11px;
    color: #000;
    flex: 1;
    border: 1px solid;
    border-color: #808080 #dfdfdf #dfdfdf #808080;
}

/* Animations */
@keyframes holidayFall {
    to {
        transform: translateY(100vh);
        opacity: 0;
    }
}

/* Responsive */
@media (max-width: 600px) {
    .retro-window {
        max-width: 100%;
    }
    
    .preset-buttons {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }
    
    .countdown-timer {
        gap: 4px;
    }
    
    .time-display {
        min-width: 50px;
        padding: 6px 8px;
    }
    
    .time-unit span {
        font-size: 20px;
    }
}