/* Reset and base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* Mobile phone mockup for desktop */
.phone-container {
    width: 100%;
    min-height: 100vh;
    background: white;
}

@media (min-width: 768px) {
    body {
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 100vh;
        padding: 2rem;
    }
    
    .phone-container {
        max-width: 375px;
        min-height: 667px;
        border: 8px solid #333;
        border-radius: 25px;
        box-shadow: 0 0 30px rgba(0,0,0,0.3);
        overflow: hidden;
        display: flex;
        flex-direction: column;
    }
}

/* Layout utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.text-center { text-align: center; }

/* Spacing utilities */
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.m-2 { margin: 0.5rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }

/* Header */
.header {
    background: #27187E;
    color: white;
    padding: 1rem;
    text-align: center;
}

.header-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.header-logo {
    height: 40px;
    margin-right: 12px;
    background-color: white;
    padding: 6px;
    border-radius: 4px;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Main content */
.main {
    flex: 1;
    padding: 1.5rem;
}

/* Footer */
.footer {
    background: #f8f9fa;
    padding: 1rem;
    text-align: center;
    border-top: 1px solid #e9ecef;
}

.footer-text {
    font-size: 0.875rem;
    color: #6c757d;
}

/* Form styles */
.form {
    width: 100%;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #374151;
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #d1d5db;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: #F6921E;
    box-shadow: 0 0 0 3px rgba(246, 146, 30, 0.1);
}

.form-input.error {
    border-color: #dc3545;
}

.form-error {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    min-height: 1.25rem;
    line-height: 1.25rem;
}

/* Button styles */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-primary {
    background-color: #F6921E;
    color: white;
}

.btn-primary:hover {
    background-color: #e6800d;
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.btn-success {
    background-color: #28a745;
    color: white;
}

.btn-success:hover {
    background-color: #218838;
}

.btn-full {
    width: 100%;
}

/* Alert styles */
.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.alert-error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.alert-warning {
    background-color: #fff3cd;
    border: 1px solid #ffeaa7;
    color: #856404;
}

/* Code display */
.code-display {
    background: #FFDD93;
    border: 2px solid #F6921E;
    border-radius: 0.5rem;
    padding: 1.5rem;
    text-align: center;
    margin: 1.5rem 0;
}

.code-value {
    font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
    font-size: 2rem;
    font-weight: bold;
    color: #27187E;
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
}

/* Instructions */
.instructions {
    background: #f8f9fa;
    border-radius: 0.5rem;
    padding: 1rem;
    margin: 1rem 0;
}

.instructions h3 {
    color: #374151;
    margin-bottom: 0.5rem;
    font-size: 1.125rem;
}

.instructions ol {
    padding-left: 1.25rem;
    color: #6b7280;
}

.instructions li {
    margin-bottom: 0.25rem;
}

/* Responsive improvements */
@media (max-width: 767px) {
    .main {
        padding: 1rem;
    }
    
    .code-value {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 1rem 1.5rem;
        font-size: 1.125rem;
    }
}