* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    -webkit-tap-highlight-color: transparent;
}
body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #1a1a2e;
    overscroll-behavior-y: none;
}
.main-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    display: flex;
    justify-content: center;
    align-items: center;
}
#background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    filter: brightness(0.6);
}
.glass-card {
    position: relative;
    z-index: 10;
    padding: 40px;
    text-align: center;
    color: white;
    width: 90%;
    max-width: 400px;
}
.logo {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: 2px;
    text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.8);
}
.fade-in-text {
    font-size: 1.1rem;
    font-weight: 300;
    margin-bottom: 20px;
    opacity: 0;
    animation: fadeIn 2s forwards 0.5s;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.8);
}
.timer-container {
    font-size: 2rem;
    font-weight: 400;
    margin-bottom: 20px;
    letter-spacing: 1px;
    opacity: 0;
    visibility: hidden;
    height: 0;
    transform: translateY(-10px);
    transition: all 0.4s ease;
    text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.8);
}
.timer-container.show {
    opacity: 0.85;
    visibility: visible;
    height: 40px;
    transform: translateY(0);
}
button#play-btn {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: none;
    width: 65px;
    height: 65px;
    font-size: 1.8rem;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 25px;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: inline-flex;
    justify-content: center;
    align-items: center;
}
button#play-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}
@keyframes dropPulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.8; }
    100% { transform: scale(1); opacity: 1; }
}
.drop-anim {
    animation: dropPulse 1.5s infinite ease-in-out;
}
.timer-toggle-row {
    width: 100%;
    display: flex;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    height: 0;
    transform: translateY(-10px);
    transition: all 0.4s ease;
}
.timer-toggle-row.show {
    opacity: 1;
    visibility: visible;
    height: 40px;
    transform: translateY(0);
}
button#timer-toggle-btn {
    background: transparent;
    color: #e3e3e3;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.2s ease;
}
button#timer-toggle-btn span {
    font-size: 30px;
}
button#timer-toggle-btn:active {
    transform: scale(0.9);
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 0.9; transform: translateY(0); }
}