:root {
    --primary-color: #2C3E50;
    --secondary-color: #27AE60;
    --accent-color: #E74C3C;
    --background-color: #ECF0F1;
    --text-color: #2C3E50;
    --success-color: #27AE60;
    --warning-color: #F1C40F;
    --error-color: #E74C3C;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}
h1 {
    font-size: 34px;
    font-family: ui-rounded;
    line-height: 34px;
    margin-bottom: 22px;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: var(--primary-color);
    padding: 1rem 0;
    box-shadow: var(--box-shadow);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    color: white;
    font-size: 1.5rem;
    text-decoration: none;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--secondary-color);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.form-input:focus {
    border-color: var(--secondary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(39, 174, 96, 0.1);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #219A52;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--primary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #1A252F;
    transform: translateY(-2px);
}

/* Cards */
.card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* Messages */
.message {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.message-success {
    background-color: rgba(39, 174, 96, 0.1);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.message-error {
    background-color: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--error-color);
    color: var(--error-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .container {
        padding: 0 15px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

.flag-select-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    justify-content: center;
    margin: 32px 0 0 0;
}
.flag-btn {
    background: #fff;
    border: 2px solid #e0e0e0;
    border-radius: 16px;
    padding: 12px 18px 8px 18px;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(44,62,80,0.06);
    transition: border 0.2s, box-shadow 0.2s, transform 0.15s;
    text-align: center;
    min-width: 73px;
    outline: none;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.flag-btn:hover, .flag-btn:focus {
    border: 2px solid var(--secondary-color);
    box-shadow: 0 4px 16px rgba(39,174,96,0.10);
    transform: translateY(-2px) scale(1.04);
}
.flag-icon {
    width: 48px;
    height: 36px;
    border-radius: 6px;
    margin-bottom: 7px;
    box-shadow: 0 1px 4px rgba(44,62,80,0.08);
}
.flag-label {
    font-size: 1.08em;
    color: #2C3E50;
    font-weight: 500;
    margin-top: 2px;
}
@media (max-width: 600px) {
    .flag-select-grid {
        gap: 10px;
    }
    .flag-btn {
        min-width: 70px;
        padding: 8px 6px 6px 6px;
    }
    .flag-label {
        font-size: 0.98em;
    }
}