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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #1a73e8, #6c47ff);
    background-image: url('https://cdn.pixabay.com/photo/2016/03/27/07/32/world-map-1282434_1280.png');
    background-size: cover;
    background-blend-mode: overlay;
}

.home-container {
    text-align: center;
    padding: 2rem;
    color: white;
    max-width: 700px;
    margin: 0 auto;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.features {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.feature {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 1rem;
}

.start-btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: #ffffff;
    color: #1a73e8;
    text-decoration: none;
    border-radius: 25px;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.container {
    width: 90%;
    max-width: 700px;
    background: rgba(255, 255, 255, 0.9);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(5px);
}

header {
    text-align: center;
    margin-bottom: 1.5rem;
}

h1 {
    color: #1a73e8;
    font-size: 2.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    color: #5f6368;
    background: rgba(255, 255, 255, 0.8);
    padding: 0.8rem;
    border-radius: 8px;
}

.timer {
    color: #ea4335;
    font-weight: bold;
}

.flag-container {
    width: 100%;
    aspect-ratio: 3/2;
    margin-bottom: 2rem;
    border: 2px solid #1a73e8;
    border-radius: 12px;
    overflow: hidden;
    background: url('https://cdn.pixabay.com/photo/2015/07/17/22/43/flag-849010_1280.jpg') no-repeat center;
    background-size: cover;
    opacity: 0.8;
}

#flag-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background-color: #f8f9fa;
}

#flag-image.hidden {
    display: none;
}

.options-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.option {
    padding: 1rem;
    border: none;
    background-color: #f8f9fa;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.option:hover {
    background-color: #e8f0fe;
    color: #1a73e8;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.option.correct {
    background-color: #34a853;
    color: white;
}

.option.wrong {
    background-color: #ea4335;
    color: white;
}

.option.disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.control-btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, #1a73e8, #4285f4);
    color: white;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
}

.control-btn:hover {
    background: linear-gradient(135deg, #1557b0, #1a73e8);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(26, 115, 232, 0.4);
}

#hint-btn {
    background: linear-gradient(135deg, #fbbc05, #f1c40f);
}

#hint-btn:hover {
    background: linear-gradient(135deg, #f9ab00, #f1c40f);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: white;
    padding: 2.5rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.modal-content h2 {
    color: #1a73e8;
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

.modal-content p {
    font-size: 1.4rem;
    margin-bottom: 2rem;
}

.admin-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    color: #333;
}

.flag-list table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
}

.flag-list th, .flag-list td {
    padding: 0.8rem;
    border-bottom: 1px solid #e0e0e0;
    text-align: left;
}

.flag-list th {
    background: #1a73e8;
    color: white;
}

.flag-list .delete-btn {
    background: #ea4335;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
}

.add-flag, .bulk-upload {
    margin-bottom: 2rem;
}

.add-flag input, .bulk-upload input {
    padding: 0.5rem;
    margin: 0.5rem 0;
    width: 100%;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.back-btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: #1a73e8;
    color: white;
    text-decoration: none;
    border-radius: 8px;
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    p { font-size: 1rem; }
    .feature { padding: 0.4rem 0.8rem; font-size: 0.9rem; }
    .start-btn { padding: 0.8rem 1.5rem; font-size: 1rem; }
    .container { width: 95%; padding: 1.5rem; }
    .options-container { grid-template-columns: 1fr; }
    .stats { flex-direction: column; gap: 0.5rem; }
    .controls { flex-direction: column; }
    .control-btn { width: 100%; margin-bottom: 0.5rem; }
    .admin-container { padding: 1rem; }
    .flag-list th, .flag-list td { font-size: 0.9rem; }
}