@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&display=swap');

:root {
    --bg-gradient-start: #ffecd2;
    --bg-gradient-end: #fcb69f;
    --text-color: #333;
    --container-bg: rgba(255, 255, 255, 0.6);
    --button-bg: #ff6a88;
    --button-text: #fff;
    --number-text: #fff;
    --slider-bg: #ccc;
    --slider-before-bg: white;
}

body.dark-mode {
    --bg-gradient-start: #485563;
    --bg-gradient-end: #29323c;
    --text-color: #f0f0f0;
    --container-bg: rgba(0, 0, 0, 0.4);
    --button-bg: #e94057;
    --number-text: #fff;
    --slider-bg: #555;
    --slider-before-bg: #333;
}

body {
    font-family: 'Montserrat', sans-serif;
    background: linear-gradient(120deg, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    transition: background 0.5s, color 0.5s;
}

.container {
    background: var(--container-bg);
    padding: 2.5rem 4rem;
    border-radius: 25px;
    backdrop-filter: blur(12px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-width: 90%;
}

header {
    margin-bottom: 2.5rem;
}

h1 {
    font-weight: 700;
    font-size: 3rem;
    letter-spacing: 1px;
}

p {
    font-weight: 400;
    font-size: 1.1rem;
    opacity: 0.8;
}

#lotto-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.lotto-set {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--number-text);
    box-shadow: 0 4px 10px rgba(0,0,0,0.25);
    animation: pop-in 0.5s ease-out forwards;
    transform: scale(0);
}

@keyframes pop-in {
    to {
        transform: scale(1);
    }
}

#generate-btn {
    background: var(--button-bg);
    color: var(--button-text);
    border: none;
    padding: 18px 40px;
    font-size: 1.3rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

#generate-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

#generate-btn:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
}

.theme-switch-container {
    position: absolute;
    top: 25px;
    right: 25px;
}

.theme-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--slider-bg);
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: var(--slider-before-bg);
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: #2196F3;
}

input:checked + .slider:before {
    transform: translateX(26px);
}