/* ========================================
   FORM VALIDATION STYLES
   Item 60/78: Enhanced form validation UI
   ======================================== */

/* ====================================
   INPUT STATES
   ==================================== */

/* Default state */
.form-input,
.form-textarea,
.form-select {
    position: relative;
    transition: all 0.3s ease;
}

/* Valid state */
input.valid,
textarea.valid,
select.valid {
    border-color: #4caf50;
    background: rgba(76, 175, 80, 0.05);
}

input.valid:focus,
textarea.valid:focus {
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

/* Invalid state */
input.invalid,
textarea.invalid,
select.invalid {
    border-color: #ff3b3b;
    background: rgba(255, 59, 59, 0.05);
}

input.invalid:focus,
textarea.invalid:focus {
    box-shadow: 0 0 0 3px rgba(255, 59, 59, 0.2);
}

/* ====================================
   ERROR MESSAGES
   ==================================== */

.error-message {
    display: none;
    color: #ff3b3b;
    font-size: 14px;
    margin-top: 6px;
    padding: 8px 12px;
    background: rgba(255, 59, 59, 0.1);
    border-left: 3px solid #ff3b3b;
    border-radius: 4px;
    animation: slideDown 0.3s ease;
}

.error-message.show {
    display: block;
}

.error-message::before {
    content: "⚠️ ";
    margin-right: 4px;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ====================================
   SUCCESS MESSAGES
   ==================================== */

.success-message {
    display: none;
    color: #4caf50;
    font-size: 14px;
    margin-top: 6px;
    padding: 8px 12px;
    background: rgba(76, 175, 80, 0.1);
    border-left: 3px solid #4caf50;
    border-radius: 4px;
    animation: slideDown 0.3s ease;
}

.success-message.show {
    display: block;
}

.success-message::before {
    content: "✓ ";
    margin-right: 4px;
}

/* ====================================
   VALIDATION ICONS
   ==================================== */

.form-group {
    position: relative;
}

.validation-icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.form-group.valid .validation-icon.valid-icon {
    opacity: 1;
}

.form-group.invalid .validation-icon.invalid-icon {
    opacity: 1;
}

/* ====================================
   REAL-TIME VALIDATION INDICATORS
   ==================================== */

.validation-progress {
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin-top: 6px;
    overflow: hidden;
}

.validation-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #ff3b3b 0%, #ffc107 50%, #4caf50 100%);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 2px;
}

/* ====================================
   PASSWORD STRENGTH INDICATOR
   ==================================== */

.password-strength {
    margin-top: 8px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    font-size: 14px;
}

.password-strength-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    margin-bottom: 8px;
    overflow: hidden;
}

.password-strength-fill {
    height: 100%;
    width: 0%;
    transition: all 0.3s ease;
    border-radius: 3px;
}

.password-strength.weak .password-strength-fill {
    width: 33%;
    background: #ff3b3b;
}

.password-strength.medium .password-strength-fill {
    width: 66%;
    background: #ffc107;
}

.password-strength.strong .password-strength-fill {
    width: 100%;
    background: #4caf50;
}

.password-strength-text {
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
}

.password-strength.weak .password-strength-text {
    color: #ff3b3b;
}

.password-strength.medium .password-strength-text {
    color: #ffc107;
}

.password-strength.strong .password-strength-text {
    color: #4caf50;
}

/* ====================================
   REQUIRED FIELD INDICATOR
   ==================================== */

.required-indicator {
    color: #ff3b3b;
    margin-left: 4px;
    font-weight: bold;
}

label.required::after {
    content: " *";
    color: #ff3b3b;
}

/* ====================================
   FIELD HINTS
   ==================================== */

.field-hint {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.field-hint::before {
    content: "ℹ️";
}

/* ====================================
   CHARACTER COUNTER
   ==================================== */

.char-counter {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    text-align: right;
    margin-top: 4px;
}

.char-counter.warning {
    color: #ffc107;
}

.char-counter.error {
    color: #ff3b3b;
}

/* ====================================
   INLINE VALIDATION LIST
   ==================================== */

.validation-checklist {
    margin-top: 8px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    font-size: 14px;
}

.validation-checklist-item {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.3s ease;
}

.validation-checklist-item:last-child {
    margin-bottom: 0;
}

.validation-checklist-item::before {
    content: "○";
    font-size: 16px;
}

.validation-checklist-item.valid {
    color: #4caf50;
}

.validation-checklist-item.valid::before {
    content: "✓";
}

.validation-checklist-item.invalid {
    color: #ff3b3b;
}

.validation-checklist-item.invalid::before {
    content: "✗";
}

/* ====================================
   FORM-LEVEL VALIDATION
   ==================================== */

.form-error-summary {
    background: rgba(255, 59, 59, 0.1);
    border: 2px solid #ff3b3b;
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 20px;
    display: none;
}

.form-error-summary.show {
    display: block;
    animation: slideDown 0.3s ease;
}

.form-error-summary h4 {
    color: #ff3b3b;
    margin: 0 0 12px 0;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-error-summary h4::before {
    content: "⚠️";
}

.form-error-summary ul {
    margin: 0;
    padding-left: 24px;
    color: rgba(255, 255, 255, 0.9);
}

.form-error-summary li {
    margin-bottom: 6px;
}

/* ====================================
   LOADING STATE
   ==================================== */

.form-submitting input,
.form-submitting textarea,
.form-submitting button {
    opacity: 0.6;
    pointer-events: none;
}

.form-submitting .submit-btn {
    position: relative;
}

.form-submitting .submit-btn::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid #fff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ====================================
   EMAIL VALIDATION
   ==================================== */

.email-suggestion {
    margin-top: 6px;
    padding: 8px 12px;
    background: rgba(255, 193, 7, 0.1);
    border-left: 3px solid #ffc107;
    border-radius: 4px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
    display: none;
    cursor: pointer;
    transition: background 0.3s ease;
}

.email-suggestion.show {
    display: block;
}

.email-suggestion:hover {
    background: rgba(255, 193, 7, 0.2);
}

.email-suggestion::before {
    content: "💡 ";
}

/* ====================================
   PHONE NUMBER FORMATTING
   ==================================== */

.phone-format {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
}

/* ====================================
   ACCESSIBILITY
   ==================================== */

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus visible for form elements */
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 3px solid var(--primary-color, #1565C0);
    outline-offset: 2px;
}

/* ====================================
   CUSTOM CHECKBOX/RADIO VALIDATION
   ==================================== */

.checkbox-group.invalid,
.radio-group.invalid {
    border: 2px solid #ff3b3b;
    border-radius: 8px;
    padding: 12px;
    background: rgba(255, 59, 59, 0.05);
}

/* ====================================
   TOOLTIP ERRORS
   ==================================== */

.validation-tooltip {
    position: absolute;
    top: -40px;
    left: 0;
    background: #ff3b3b;
    color: white;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 13px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 10;
}

.validation-tooltip::after {
    content: "";
    position: absolute;
    bottom: -6px;
    left: 20px;
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid #ff3b3b;
}

input:focus.invalid + .validation-tooltip {
    opacity: 1;
}

/* ====================================
   RESPONSIVE
   ==================================== */

@media (max-width: 768px) {
    .error-message,
    .success-message {
        font-size: 13px;
        padding: 6px 10px;
    }
    
    .validation-icon {
        font-size: 18px;
    }
    
    .form-error-summary {
        padding: 12px;
    }
}