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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #f5f5f5;
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 20px;
    color: white;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.hero {
    background: white;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-top: 40px;
}

.hero h2 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: #333;
}

.hero p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 30px;
}

.btn-primary {
    display: inline-block;
    background: #6b6b6b;
    color: white;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s;
}

.btn-primary:hover {
    background: #5a5a5a;
}

.event-detail {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-top: 40px;
}

.event-header {
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 20px;
    margin-bottom: 30px;
}

.event-header h1 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 10px;
}

.event-badge {
    display: inline-block;
    background: #6b6b6b;
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-top: 10px;
}

.event-info {
    display: grid;
    gap: 20px;
    margin-bottom: 30px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.info-item svg {
    width: 24px;
    height: 24px;
    color: #6b6b6b;
}

.info-item span {
    font-size: 1.1rem;
    color: #333;
}

.rsvp-section {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid #f0f0f0;
}

.rsvp-section h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #333;
}

.rsvp-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: #333;
}

.form-group input,
.form-group select {
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #6b6b6b;
}

.btn-submit {
    background: #6b6b6b;
    color: white;
    padding: 14px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 10px;
}

.btn-submit:hover {
    background: #5a5a5a;
}

.btn-submit:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.loading {
    text-align: center;
    padding: 40px;
    color: white;
    font-size: 1.2rem;
}

.error {
    background: #fee;
    color: #c33;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.success {
    background: #efe;
    color: #3c3;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .container {
        padding: 15px;
        max-width: 100%;
    }
    
    header {
        padding: 30px 15px 20px;
    }
    
    header h1 {
        font-size: 2.5rem;
        margin-bottom: 8px;
    }
    
    header p {
        font-size: 1rem;
    }
    
    .hero {
        padding: 30px 20px;
        margin-top: 20px;
        border-radius: 12px;
    }
    
    .hero h2 {
        font-size: 1.5rem;
        margin-bottom: 8px;
    }
    
    .hero p {
        font-size: 1rem;
        margin-bottom: 25px;
    }
    
    .btn-primary {
        padding: 14px 28px;
        font-size: 1rem;
        width: 100%;
        max-width: 300px;
        display: block;
        margin: 0 auto;
    }
    
    .event-detail {
        padding: 25px 20px;
        margin-top: 20px;
        border-radius: 12px;
    }
    
    .event-header {
        padding-bottom: 15px;
        margin-bottom: 20px;
    }
    
    .event-header h1 {
        font-size: 1.75rem;
        line-height: 1.3;
        margin-bottom: 12px;
    }
    
    .event-badge {
        font-size: 0.85rem;
        padding: 5px 10px;
    }
    
    .event-info {
        gap: 15px;
        margin-bottom: 25px;
    }
    
    .info-item {
        gap: 10px;
        flex-wrap: wrap;
    }
    
    .info-item svg {
        width: 20px;
        height: 20px;
        flex-shrink: 0;
    }
    
    .info-item span {
        font-size: 1rem;
        line-height: 1.4;
        word-break: break-word;
    }
    
    .rsvp-section {
        margin-top: 30px;
        padding-top: 25px;
    }
    
    .rsvp-section h2 {
        font-size: 1.5rem;
        margin-bottom: 20px;
    }
    
    .form-group {
        gap: 6px;
    }
    
    .form-group label {
        font-size: 0.95rem;
    }
    
    .form-group input,
    .form-group select {
        padding: 14px;
        font-size: 16px; /* Prevents zoom on iOS */
        border-radius: 8px;
        width: 100%;
        -webkit-appearance: none;
        appearance: none;
    }
    
    .btn-submit {
        padding: 16px 30px;
        font-size: 1rem;
        width: 100%;
        margin-top: 10px;
    }
    
    .loading {
        padding: 30px 20px;
        font-size: 1.1rem;
    }
    
    .error,
    .success {
        padding: 15px;
        font-size: 0.95rem;
        margin: 15px 0;
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    header {
        padding: 25px 10px 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .container {
        padding: 10px;
    }
    
    .hero {
        padding: 25px 15px;
    }
    
    .hero h2 {
        font-size: 1.3rem;
    }
    
    .event-detail {
        padding: 20px 15px;
    }
    
    .event-header h1 {
        font-size: 1.5rem;
    }
    
    .info-item span {
        font-size: 0.95rem;
    }
}

/* Prevent text zoom on input focus (iOS) */
@supports (-webkit-touch-callout: none) {
    .form-group input,
    .form-group select {
        font-size: 16px !important;
    }
}

/* Touch-friendly button sizes */
@media (hover: none) and (pointer: coarse) {
    .btn-primary,
    .btn-submit {
        min-height: 44px; /* iOS recommended touch target */
    }
}