/* Form Styles */
.book-form {
    display: grid;
    gap: var(--spacing-lg);
}

.form-group {
    display: grid;
    gap: var(--spacing-sm);
}

.form-group label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    padding: var(--spacing-md);
    border: 2px solid var(--medium-gray);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
    background: var(--bg-secondary);
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15), var(--shadow-md);
    transform: translateY(-2px);
    background: var(--white);
}

.form-group input:hover:not(:focus) {
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.form-group input::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
    transition: opacity var(--transition-normal);
}

.form-group input:focus::placeholder {
    opacity: 0.5;
    transform: translateY(-2px);
}

/* Form Group Enhancements */
.form-group {
    position: relative;
}

.form-group label {
    transition: color var(--transition-normal);
}

.form-group:focus-within label {
    color: var(--primary-color);
}

/* Validation States */
.form-group.has-success label {
    color: var(--success-color);
}

.form-group.has-error label {
    color: var(--danger-color);
}

.form-group input.valid {
    border-color: var(--success-color);
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%2328a745" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="20,6 9,17 4,12"></polyline></svg>');
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

.form-group input.error {
    border-color: var(--danger-color);
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%23dc3545" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="10"></circle><line x1="15" y1="9" x2="9" y2="15"></line><line x1="9" y1="9" x2="15" y2="15"></line></svg>');
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

.form-group input.valid:focus {
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.15), var(--shadow-md);
}

.form-group input.error:focus {
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.15), var(--shadow-md);
}

/* Field Error Messages */
.field-error {
    color: var(--danger-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    animation: fadeInUp 0.3s ease-out;
}

.field-error::before {
    content: '⚠️';
    font-size: var(--font-size-xs);
}

/* Form Validation Summary */
.validation-summary {
    background: rgba(248, 215, 218, 0.95);
    color: #721c24;
    border: 1px solid #f5c6cb;
    border-left: 4px solid var(--danger-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.3s ease-out;
}

.validation-summary h4 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: var(--font-size-base);
    font-weight: 600;
}

.validation-summary ul {
    margin: 0;
    padding-left: var(--spacing-lg);
}

.validation-summary li {
    margin-bottom: var(--spacing-xs);
}

/* Real-time Validation Indicators */
.form-group input:not(:placeholder-shown):valid {
    border-color: var(--success-color);
}

.form-group input:not(:placeholder-shown):invalid {
    border-color: var(--danger-color);
}

/* Loading State for Validation */
.form-group.validating input {
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%236c757d" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="3"></circle><path d="m12 1 0 6m0 6 0 6m11-7-6 0m-6 0-6 0"></path></svg>');
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

.form-group.validating input::after {
    animation: spin 1s linear infinite;
}

/* Security Warning Styles */
.security-warning {
    background: rgba(255, 243, 205, 0.95);
    color: #856404;
    border: 1px solid #ffeaa7;
    border-left: 4px solid var(--warning-color);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.security-warning::before {
    content: '🔒';
    font-size: var(--font-size-sm);
}

/* Character Counter */
.character-counter {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-align: right;
    margin-top: var(--spacing-xs);
    transition: color var(--transition-normal);
}

.character-counter.warning {
    color: var(--warning-color);
}

.character-counter.error {
    color: var(--danger-color);
}

/* Form Submission States */
.book-form.submitting {
    pointer-events: none;
    opacity: 0.8;
}

.book-form.submitting .btn {
    animation: pulse 1s infinite;
}

/* Form Field Floating Labels Effect */
.form-group {
    position: relative;
}

.form-group.floating label {
    position: absolute;
    top: 50%;
    left: var(--spacing-md);
    transform: translateY(-50%);
    background: var(--bg-secondary);
    padding: 0 var(--spacing-xs);
    transition: all var(--transition-normal);
    pointer-events: none;
    color: var(--text-muted);
}

.form-group.floating input:focus + label,
.form-group.floating input:not(:placeholder-shown) + label {
    top: 0;
    transform: translateY(-50%);
    font-size: var(--font-size-xs);
    color: var(--primary-color);
    font-weight: 600;
}