:root {
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.25);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --primary-color: #ff7e67; /* Pomodoro */
    --secondary-color: #4facfe; /* Short Break */
    --tertiary-color: #43e97b; /* Long Break */
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
    background-color: #1a1a2e; /* Fallback */
    transition: background-color 1s ease;
}

/* Dynamic Animated Background */
.background {
    position: absolute;
    width: 100vw;
    height: 100vh;
    top: 0;
    left: 0;
    z-index: -1;
    overflow: hidden;
    background: #0f172a;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.8;
    animation: float 20s infinite ease-in-out alternate;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #ff7e67, #ff5757);
    top: -200px;
    left: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #4facfe, #00f2fe);
    bottom: -150px;
    right: -100px;
    animation-delay: -5s;
    animation-duration: 25s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #ff9a9e, #fecfef);
    top: 40%;
    left: 40%;
    animation-delay: -10s;
    animation-duration: 30s;
}

@keyframes float {
    0% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(100px, 150px) scale(1.1);
    }
    66% {
        transform: translate(-100px, 50px) scale(0.9);
    }
    100% {
        transform: translate(50px, -150px) scale(1.05);
    }
}

/* Glassmorphism Container */
.glass-container {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: 40px;
    padding: 3rem;
    width: 90%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5rem;
    z-index: 10;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px 0 rgba(31, 38, 135, 0.25);
}

/* Mode Selectors */
.mode-selector {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 30px;
    padding: 5px;
    gap: 5px;
    width: 100%;
}

.mode-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.8rem 1rem;
    border-radius: 25px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.mode-btn:hover {
    color: var(--text-primary);
}

.mode-btn.active {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* Timer Display */
.timer-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.timer-display {
    font-family: 'Outfit', sans-serif;
    font-size: 7rem;
    font-weight: 700;
    letter-spacing: -2px;
    text-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    line-height: 1;
    color: white;
}

/* Time Adjust */
.time-adjust {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.adjust-btn {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.3s ease;
}

.adjust-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    transform: scale(1.1);
}

.adjust-btn:active {
    transform: scale(0.95);
}

/* Controls */
.controls {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.control-btn {
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.play-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: white;
    font-size: 2.5rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
}

.play-btn:hover {
    background: rgba(255, 255, 255, 0.35);
    transform: scale(1.1);
}

.play-btn:active {
    transform: scale(0.95);
}

.reset-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-secondary);
    font-size: 1.5rem;
}

.reset-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    transform: scale(1.1) rotate(-45deg);
}

.reset-btn:active {
    transform: scale(0.95) rotate(-90deg);
}

/* Status Text */
.settings-hint {
    text-align: center;
}

#status-text {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .timer-display {
        font-size: 5rem;
    }
    
    .glass-container {
        padding: 2rem 1.5rem;
        gap: 2rem;
    }
    
    .play-btn {
        width: 70px;
        height: 70px;
        font-size: 2rem;
    }
}