/**
 * WP SMTP Contact Form - Frontend Styles
 * Phiên bản: 1.0.0
 */

.wp-smtp-form-wrap {
    --smtp-primary: #4f46e5;
    --smtp-primary-hover: #4338ca;
    --smtp-text: #1f2937;
    --smtp-text-muted: #6b7280;
    --smtp-bg: transparent;
    --smtp-border: transparent;
    --smtp-border-focus: #6366f1;
    --smtp-ring: rgba(99, 102, 241, 0.2);
    --smtp-radius: 8px;

    background: var(--smtp-bg);
    border: none;
    border-radius: var(--smtp-radius);
    padding: 0;
    margin: 16px 0;
    box-shadow: none;
    font-family: inherit;
    box-sizing: border-box;
}

/* Kiểu khung Card nền trắng */
.wp-smtp-form-wrap.wp-smtp-bg-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    padding: 28px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

/* Kiểu khung Tùy chỉnh màu nền */
.wp-smtp-form-wrap.wp-smtp-bg-custom {
    border-radius: 12px;
}

.wp-smtp-form-wrap * {
    box-sizing: border-box;
}

/* Header */
.wp-smtp-form-header {
    margin-bottom: 24px;
    border-bottom: 1px solid #f3f4f6;
    padding-bottom: 16px;
}

.wp-smtp-form-title {
    margin: 0 0 8px 0 !important;
    font-size: 22px !important;
    font-weight: 700 !important;
    color: var(--smtp-text) !important;
    line-height: 1.3 !important;
}

.wp-smtp-form-desc {
    margin: 0 !important;
    font-size: 14px !important;
    color: var(--smtp-text-muted) !important;
    line-height: 1.5 !important;
}

/* Alert Notification */
.wp-smtp-form-alert {
    padding: 14px 18px;
    border-radius: 6px;
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 20px;
    animation: wpSmtpFadeIn 0.3s ease;
}

.wp-smtp-alert-success {
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
    color: #065f46;
}

.wp-smtp-alert-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

/* Grid layout */
.wp-smtp-fields-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.wp-smtp-field-group {
    display: flex;
    flex-direction: column;
}

.wp-smtp-col-12 {
    flex: 0 0 100%;
    width: 100%;
}

.wp-smtp-col-6 {
    flex: 0 0 calc(50% - 8px);
    width: calc(50% - 8px);
}

@media (max-width: 640px) {
    .wp-smtp-col-6 {
        flex: 0 0 100%;
        width: 100%;
    }
}

/* Labels */
.wp-smtp-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--smtp-text);
    margin-bottom: 6px;
}

.wp-smtp-required {
    color: #ef4444;
    margin-left: 2px;
}

/* Inputs & Textarea */
.wp-smtp-input {
    width: 100% !important;
    padding: 10px 14px !important;
    font-size: 14px !important;
    color: var(--smtp-text) !important;
    background: #fff !important;
    border: 1px solid var(--smtp-border) !important;
    border-radius: 6px !important;
    outline: none !important;
    transition: border-color 0.2s, box-shadow 0.2s !important;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04) !important;
}

.wp-smtp-input:focus {
    border-color: var(--smtp-border-focus) !important;
    box-shadow: 0 0 0 3px var(--smtp-ring) !important;
}

.wp-smtp-input.wp-smtp-input-error {
    border-color: #ef4444 !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2) !important;
}

.wp-smtp-textarea {
    resize: vertical !important;
    min-height: 100px !important;
    font-family: inherit !important;
}

/* Submit button */
.wp-smtp-submit-wrap {
    margin-top: 24px;
    display: flex;
}

.wp-smtp-align-left {
    justify-content: flex-start;
}

.wp-smtp-align-center {
    justify-content: center;
}

.wp-smtp-align-right {
    justify-content: flex-end;
}

.wp-smtp-align-full {
    justify-content: stretch;
}

.wp-smtp-align-full .wp-smtp-submit-btn {
    width: 100% !important;
}

.wp-smtp-submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--smtp-submit-bg, var(--smtp-primary));
    color: var(--smtp-submit-color, #ffffff) !important;
    border: none;
    border-radius: var(--smtp-submit-radius, 6px);
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
    text-decoration: none !important;
    line-height: 1.4;
}

.wp-smtp-submit-btn:hover {
    background: var(--smtp-submit-hover-bg, var(--smtp-primary-hover));
    color: var(--smtp-submit-color, #ffffff) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.wp-smtp-submit-btn:active {
    transform: translateY(0);
}

.wp-smtp-btn-size-small {
    padding: 8px 18px !important;
    font-size: 13px !important;
}

.wp-smtp-btn-size-medium {
    padding: 12px 28px !important;
    font-size: 15px !important;
}

.wp-smtp-btn-size-large {
    padding: 16px 36px !important;
    font-size: 17px !important;
}

.wp-smtp-submit-btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
}

/* Spinner */
.wp-smtp-btn-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: wpSmtpSpin 0.8s linear infinite;
}

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

@keyframes wpSmtpFadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Dark Theme */
.wp-smtp-theme-dark {
    --smtp-text: #f9fafb;
    --smtp-text-muted: #9ca3af;
    --smtp-bg: #1e293b;
    --smtp-border: #334155;
    --smtp-border-focus: #818cf8;
    --smtp-ring: rgba(129, 140, 248, 0.25);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

.wp-smtp-theme-dark .wp-smtp-form-header {
    border-bottom-color: #334155;
}

.wp-smtp-theme-dark .wp-smtp-input {
    background: #0f172a !important;
    border-color: #334155 !important;
    color: #f8fafc !important;
}

.wp-smtp-theme-dark .wp-smtp-alert-success {
    background: #064e3b;
    border-color: #047857;
    color: #a7f3d0;
}

.wp-smtp-theme-dark .wp-smtp-alert-error {
    background: #7f1d1d;
    border-color: #991b1b;
    color: #fecaca;
}