/**
 * IT-ERA Form Validation Styles
 * Comprehensive CSS for form validation feedback
 * Version: 2.0.0
 */

/* =========================================
   BASE FORM STYLES
   ========================================= */

.form-enhanced {
    position: relative;
}

.form-enhanced input,
.form-enhanced textarea,
.form-enhanced select {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-width: 2px;
}

/* =========================================
   VALIDATION STATES
   ========================================= */

/* Invalid State */
.is-invalid {
    border-color: #dc3545 !important;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25) !important;
    background-color: #fff5f5 !important;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath d='M5.8 4.6L7.4 7.4M7.4 4.6L5.8 7.4'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    padding-right: calc(1.5em + 0.75rem);
}

.is-invalid:focus {
    border-color: #dc3545 !important;
    box-shadow: 0 0 0 0.35rem rgba(220, 53, 69, 0.35) !important;
    outline: none;
}

/* Valid State */
.is-valid {
    border-color: #28a745 !important;
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25) !important;
    background-color: #f0fff4 !important;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8L2.3 4.3l3.8-4c.6-.63 1.6-.27 1.2.7L2.3 6.73z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    padding-right: calc(1.5em + 0.75rem);
}

.is-valid:focus {
    border-color: #28a745 !important;
    box-shadow: 0 0 0 0.35rem rgba(40, 167, 69, 0.35) !important;
    outline: none;
}

/* Neutral/Default State */
.form-enhanced input:focus:not(.is-invalid):not(.is-valid),
.form-enhanced textarea:focus:not(.is-invalid):not(.is-valid),
.form-enhanced select:focus:not(.is-invalid):not(.is-valid) {
    border-color: #2563eb !important;
    box-shadow: 0 0 0 0.25rem rgba(37, 99, 235, 0.25) !important;
    outline: none;
}

/* =========================================
   ERROR AND SUCCESS MESSAGES
   ========================================= */

.form-error-message {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    line-height: 1.4;
}

.form-error-message::before {
    content: "⚠️";
    margin-right: 0.5rem;
    flex-shrink: 0;
}

.form-success-message {
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Form Messages */
.form-global-error {
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    color: #b91c1c;
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: start;
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-global-error .icon {
    flex-shrink: 0;
    margin-right: 0.75rem;
    margin-top: 0.125rem;
}

.form-global-success {
    background-color: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #15803d;
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: start;
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-global-success .icon {
    flex-shrink: 0;
    margin-right: 0.75rem;
    margin-top: 0.125rem;
}

/* =========================================
   LOADING STATES
   ========================================= */

.form-loading {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

.form-loading input,
.form-loading textarea,
.form-loading select {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-submit-loading {
    position: relative;
    overflow: hidden;
}

.form-submit-loading::after {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: loading-shimmer 1.5s infinite;
}

/* =========================================
   ANIMATIONS
   ========================================= */

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
        max-height: 0;
    }
    to {
        opacity: 1;
        transform: translateY(0);
        max-height: 100px;
    }
}

@keyframes slideUp {
    from {
        opacity: 1;
        transform: translateY(0);
        max-height: 100px;
    }
    to {
        opacity: 0;
        transform: translateY(-10px);
        max-height: 0;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-2px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(2px);
    }
}

@keyframes loading-shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* =========================================
   SPECIAL FORM TYPES
   ========================================= */

/* Newsletter Form Styles */
.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.newsletter-form .form-group {
    display: flex;
    flex-direction: column;
}

.newsletter-form .form-inline {
    display: flex;
    gap: 0.5rem;
}

.newsletter-form .form-inline input {
    flex: 1;
}

.newsletter-form .form-inline button {
    flex-shrink: 0;
    white-space: nowrap;
}

/* Contact Form Styles */
.contact-form .form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .contact-form .form-grid {
        grid-template-columns: 1fr 1fr;
    }

    .contact-form .form-full-width {
        grid-column: 1 / -1;
    }
}

/* =========================================
   FIELD-SPECIFIC STYLES
   ========================================= */

/* Email Field */
input[type="email"].is-invalid {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3cpath d='M2 3l8 0c.6 0 1 .4 1 1v4c0 .6-.4 1-1 1H2c-.6 0-1-.4-1-1V4c0-.6.4-1 1-1z'/%3e%3cpath d='M11 4L6 7L1 4'/%3e%3c/svg%3e") !important;
}

input[type="email"].is-valid {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2328a745' viewBox='0 0 12 12'%3e%3cpath d='M2 3l8 0c.6 0 1 .4 1 1v4c0 .6-.4 1-1 1H2c-.6 0-1-.4-1-1V4c0-.6.4-1 1-1z'/%3e%3cpath d='M11 4L6 7L1 4'/%3e%3c/svg%3e") !important;
}

/* Phone Field */
input[type="tel"].is-invalid {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3cpath d='M8.5 1H3.5C2.67 1 2 1.67 2 2.5v7C2 10.33 2.67 11 3.5 11h5c.83 0 1.5-.67 1.5-1.5v-7C10 1.67 9.33 1 8.5 1z'/%3e%3c/svg%3e") !important;
}

input[type="tel"].is-valid {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2328a745' viewBox='0 0 12 12'%3e%3cpath d='M8.5 1H3.5C2.67 1 2 1.67 2 2.5v7C2 10.33 2.67 11 3.5 11h5c.83 0 1.5-.67 1.5-1.5v-7C10 1.67 9.33 1 8.5 1z'/%3e%3c/svg%3e") !important;
}

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

@media (max-width: 768px) {
    .form-error-message {
        font-size: 0.8rem;
    }

    .form-global-error,
    .form-global-success {
        padding: 0.75rem;
    }

    .is-invalid,
    .is-valid {
        padding-right: calc(1.2em + 0.6rem);
        background-size: calc(0.6em + 0.3rem) calc(0.6em + 0.3rem);
    }
}

/* =========================================
   HIGH CONTRAST MODE
   ========================================= */

@media (prefers-contrast: high) {
    .is-invalid {
        border-color: #b91c1c !important;
        background-color: #fef2f2 !important;
    }

    .is-valid {
        border-color: #166534 !important;
        background-color: #f0fdf4 !important;
    }

    .form-error-message {
        color: #b91c1c;
        font-weight: 600;
    }
}

/* =========================================
   REDUCED MOTION
   ========================================= */

@media (prefers-reduced-motion: reduce) {
    .form-error-message,
    .form-success-message,
    .form-global-error,
    .form-global-success {
        animation: none;
    }

    .is-invalid,
    .is-valid,
    input,
    textarea,
    select {
        transition: none;
    }

    .form-submit-loading::after {
        animation: none;
    }
}

/* =========================================
   PRINT STYLES
   ========================================= */

@media print {
    .form-error-message,
    .form-global-error,
    .form-submit-loading::after {
        display: none !important;
    }

    .is-invalid,
    .is-valid {
        border: 2px solid #000 !important;
        box-shadow: none !important;
        background-image: none !important;
        background-color: transparent !important;
    }
}

/* =========================================
   DARK MODE SUPPORT
   ========================================= */

@media (prefers-color-scheme: dark) {
    .form-global-error {
        background-color: #450a0a;
        border-color: #7f1d1d;
        color: #f87171;
    }

    .form-global-success {
        background-color: #052e16;
        border-color: #166534;
        color: #4ade80;
    }

    .is-invalid {
        background-color: #450a0a !important;
        border-color: #dc3545 !important;
    }

    .is-valid {
        background-color: #052e16 !important;
        border-color: #28a745 !important;
    }

    .form-error-message {
        color: #f87171;
    }
}

/* =========================================
   FOCUS VISIBLE SUPPORT
   ========================================= */

.form-enhanced input:focus-visible,
.form-enhanced textarea:focus-visible,
.form-enhanced select:focus-visible,
.form-enhanced button:focus-visible {
    outline: 2px solid #2563eb;
    outline-offset: 2px;
}

/* =========================================
   UTILITIES
   ========================================= */

.form-shake {
    animation: shake 0.5s ease-in-out;
}

.form-hidden {
    display: none !important;
}

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