:root {
    --bg-color: rgba(15, 15, 20, 0.4);
    --text-color: #ffffff;
    --accent-color: #00ffcc;
    --font-family: 'Inter', sans-serif;
    --blur-amount: 16px;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.5);
    --scale: 1;
    --border-radius: 24px;
}

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

body {
    background: transparent;
    color: var(--text-color);
    font-family: var(--font-family);
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    min-height: 100vh;
    overflow: hidden;
}

.clock-container {
    background: var(--bg-color);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 32px 48px;
    margin: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 8px 32px var(--shadow-color);
    transform: scale(var(--scale));
    transform-origin: top left;
    transition: all 0.3s ease;
    opacity: 0;
    animation: fade-in 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.time-display {
    font-size: 6rem;
    font-weight: 800;
    line-height: 1;
    display: flex;
    align-items: baseline;
    letter-spacing: -2px;
    text-shadow: var(--text-shadow, 0 4px 12px rgba(0,0,0,0.3));
    -webkit-text-stroke: var(--text-border-size, 0px) var(--text-border-color, transparent);
}

.time-display span {
    display: inline-block;
    transition: transform 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.time-display .seconds {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--accent-color);
    opacity: 0.9;
}

.separator {
    margin: 0 4px;
    animation: pulse 2s infinite;
}

#sep-ms {
    font-size: 2.5rem;
    margin-left: 8px;
    margin-right: 2px;
    color: var(--accent-color);
    opacity: 0.9;
}

.time-display .ampm {
    font-size: 2rem;
    font-weight: 600;
    margin-left: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.7;
}

.date-display {
    margin-top: 8px;
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: 0.5px;
    opacity: 0.8;
    text-shadow: var(--text-shadow, 0 2px 4px rgba(0,0,0,0.3));
    -webkit-text-stroke: var(--text-border-size, 0px) var(--text-border-color, transparent);
    color: var(--text-color);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

@keyframes fade-in {
    0% {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
    100% {
        opacity: 1;
        transform: scale(var(--scale)) translateY(0);
    }
}

.theme-neon {
    --bg-color: rgba(10, 10, 10, 0.7);
    --border-color: var(--accent-color);
    --shadow-color: var(--accent-color);
    box-shadow: 0 0 20px var(--shadow-color), inset 0 0 10px var(--shadow-color);
    --text-shadow: 0 0 8px var(--accent-color);
}

.theme-minimal {
    --bg-color: transparent;
    --border-color: transparent;
    --shadow-color: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
    padding: 0;
}

.anim-flip {
    animation: flip 0.3s cubic-bezier(0.455, 0.03, 0.515, 0.955);
}

.anim-slide {
    animation: slide-up 0.3s cubic-bezier(0.215, 0.61, 0.355, 1);
}

@keyframes flip {
    0% { transform: rotateX(-90deg); opacity: 0; }
    100% { transform: rotateX(0); opacity: 1; }
}

@keyframes slide-up {
    0% { transform: translateY(20px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}