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

:root {
    --bg-gradient-start: #667eea;
    --bg-gradient-end: #764ba2;
    --container-bg: rgba(255, 255, 255, 0.95);
    --text-primary: #1a1a2e;
    --text-secondary: #666;
    --text-muted: #888;
    --input-border: #e0e0e0;
    --input-bg: #ffffff;
    --set-bg-start: #f8f9ff;
    --set-bg-end: #ffffff;
    --set-border: #e8e8e8;
    --footer-border: #eee;
}

[data-theme="dark"] {
    --bg-gradient-start: #1a1a2e;
    --bg-gradient-end: #16213e;
    --container-bg: rgba(30, 30, 50, 0.95);
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #888;
    --input-border: #444;
    --input-bg: #2a2a4a;
    --set-bg-start: #252545;
    --set-bg-end: #2a2a4a;
    --set-border: #3a3a5a;
    --footer-border: #3a3a5a;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    transition: background 0.3s ease;
}

.container {
    background: var(--container-bg);
    backdrop-filter: blur(10px);
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    text-align: center;
    max-width: 700px;
    width: 100%;
    animation: slideUp 0.6s ease-out;
    position: relative;
    transition: background 0.3s ease;
}

/* Top Controls */
.top-controls {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    align-items: center;
}

/* Theme Toggle Button */
.theme-toggle {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    padding: 0;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.theme-icon {
    font-size: 1.4rem;
}

/* Language Selector */
.language-selector {
    position: relative;
}

.lang-button {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 15px;
    border-radius: 25px;
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.lang-button:hover {
    transform: translateY(-2px);
}

.lang-icon {
    font-size: 1.2rem;
}

.arrow {
    font-size: 0.7rem;
    transition: transform 0.3s ease;
}

.lang-button.active .arrow {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--container-bg);
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    padding: 10px;
    min-width: 160px;
    max-height: 300px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    padding: 10px 15px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-primary);
    font-size: 0.9rem;
    text-align: left;
}

.lang-option:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
}

.lang-option.active {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

/* Scrollbar for dropdown */
.lang-dropdown::-webkit-scrollbar {
    width: 6px;
}

.lang-dropdown::-webkit-scrollbar-track {
    background: transparent;
}

.lang-dropdown::-webkit-scrollbar-thumb {
    background: rgba(102, 126, 234, 0.3);
    border-radius: 3px;
}

.lang-dropdown::-webkit-scrollbar-thumb:hover {
    background: rgba(102, 126, 234, 0.5);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header {
    margin-bottom: 30px;
}

.logo {
    font-size: 4rem;
    margin-bottom: 10px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

h1 {
    color: var(--text-primary);
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 400;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.input-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.input-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

input[type="number"] {
    padding: 12px 20px;
    border: 2px solid var(--input-border);
    border-radius: 12px;
    font-size: 1.1rem;
    width: 100px;
    text-align: center;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    transition: all 0.3s ease;
    -moz-appearance: textfield;
    background: var(--input-bg);
    color: var(--text-primary);
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 16px 40px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.5);
}

button:active {
    transform: translateY(0);
}

.btn-icon {
    font-size: 1.3rem;
}

#result {
    margin-top: 35px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.lotto-set {
    background: linear-gradient(135deg, var(--set-bg-start) 0%, var(--set-bg-end) 100%);
    border: 1px solid var(--set-border);
    border-radius: 16px;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: fadeIn 0.5s ease-out;
    transition: all 0.3s ease;
}

.lotto-set:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.set-number {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.85rem;
    font-weight: 700;
    flex-shrink: 0;
}

.numbers-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    flex: 1;
}

.lotto-ball {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1rem;
    font-weight: 700;
    color: white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.lotto-ball::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 10px;
    width: 8px;
    height: 8px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
}

/* Ball colors based on number ranges */
.ball-yellow { background: linear-gradient(135deg, #ffd93d, #f9a825); }
.ball-blue { background: linear-gradient(135deg, #6eb5ff, #2196f3); }
.ball-red { background: linear-gradient(135deg, #ff6b6b, #e53935); }
.ball-gray { background: linear-gradient(135deg, #a0a0a0, #616161); }
.ball-green { background: linear-gradient(135deg, #69f0ae, #00c853); }

footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--footer-border);
}

footer p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 25px;
        padding-top: 80px;
    }

    .top-controls {
        top: 15px;
        right: 15px;
        gap: 8px;
    }

    .theme-toggle {
        width: 40px;
        height: 40px;
    }

    .lang-button {
        padding: 8px 12px;
        font-size: 0.8rem;
    }

    h1 {
        font-size: 1.6rem;
    }

    .logo {
        font-size: 3rem;
    }

    .controls {
        gap: 20px;
    }

    button {
        padding: 14px 30px;
        font-size: 1rem;
    }

    .lotto-ball {
        width: 38px;
        height: 38px;
        font-size: 0.9rem;
    }

    .lotto-set {
        flex-direction: column;
        gap: 10px;
    }
}