/* ════════════════════════════════════════════════════════════════════
   FormBuilder — Front-End Form Styles
   ════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --fb-site-bg:          #f8faff;
    --fb-site-surface:     #ffffff;
    --fb-site-border:      #e2e8f0;
    --fb-site-accent:      #6366f1;
    --fb-site-accent-dark: #4f46e5;
    --fb-site-accent-glow: rgba(99,102,241,0.15);
    --fb-site-text:        #1e293b;
    --fb-site-text-muted:  #64748b;
    --fb-site-danger:      #ef4444;
    --fb-site-success:     #10b981;
    --fb-site-radius:      10px;
    --fb-site-shadow:      0 4px 24px rgba(99,102,241,0.1);
    --fb-site-transition:  0.2s ease;
}

.fb-site-wrapper {
    font-family: 'Inter', -apple-system, sans-serif;
    max-width: 680px;
    margin: 40px auto;
    padding: 0 16px;
}

/* ── FORM CARD ──────────────────────────────────────────────────────── */
.fb-site-form-card {
    background: var(--fb-site-surface);
    border: 1px solid var(--fb-site-border);
    border-radius: 16px;
    box-shadow: var(--fb-site-shadow);
    overflow: hidden;
    animation: fb-site-slide-up 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes fb-site-slide-up {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── FORM HEADER ────────────────────────────────────────────────────── */
.fb-site-form-header {
    background: linear-gradient(135deg, var(--fb-site-accent) 0%, #8b5cf6 100%);
    padding: 32px 36px;
    color: white;
    position: relative;
    overflow: hidden;
}

.fb-site-form-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
}

.fb-site-form-title {
    font-size: 24px;
    font-weight: 700;
    margin: 0 0 6px;
    position: relative;
}

.fb-site-form-desc {
    font-size: 14.5px;
    opacity: 0.85;
    margin: 0;
    line-height: 1.6;
    position: relative;
}

/* ── FORM BODY ──────────────────────────────────────────────────────── */
.fb-site-form-body {
    padding: 32px 36px;
}

/* ── FIELD GROUPS ───────────────────────────────────────────────────── */
.fb-site-field {
    margin-bottom: 22px;
    animation: fb-site-field-in 0.3s ease;
}

@keyframes fb-site-field-in {
    from { opacity: 0; transform: translateX(-6px); }
    to   { opacity: 1; transform: translateX(0); }
}

.fb-site-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--fb-site-text);
    margin-bottom: 8px;
}

.fb-site-required {
    color: var(--fb-site-danger);
    margin-left: 3px;
}

/* ── INPUTS ─────────────────────────────────────────────────────────── */
.fb-site-input,
.fb-site-textarea,
.fb-site-select {
    width: 100%;
    padding: 11px 15px;
    border: 1.5px solid var(--fb-site-border);
    border-radius: var(--fb-site-radius);
    font-size: 14.5px;
    font-family: 'Inter', sans-serif;
    color: var(--fb-site-text);
    background: var(--fb-site-bg);
    transition: all var(--fb-site-transition);
    outline: none;
    appearance: none;
}

.fb-site-input:focus,
.fb-site-textarea:focus,
.fb-site-select:focus {
    border-color: var(--fb-site-accent);
    background: var(--fb-site-surface);
    box-shadow: 0 0 0 4px var(--fb-site-accent-glow);
}

.fb-site-input::placeholder,
.fb-site-textarea::placeholder {
    color: #94a3b8;
}

.fb-site-input.fb-site-invalid,
.fb-site-textarea.fb-site-invalid,
.fb-site-select.fb-site-invalid {
    border-color: var(--fb-site-danger);
    box-shadow: 0 0 0 4px rgba(239,68,68,0.1);
}

.fb-site-textarea {
    min-height: 110px;
    resize: vertical;
    line-height: 1.6;
}

.fb-site-select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath fill='%2364748b' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

/* ── RADIO & CHECKBOX ───────────────────────────────────────────────── */
.fb-site-radio-group,
.fb-site-checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.fb-site-radio-label,
.fb-site-checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14.5px;
    color: var(--fb-site-text);
    padding: 10px 14px;
    border-radius: var(--fb-site-radius);
    border: 1.5px solid var(--fb-site-border);
    transition: all var(--fb-site-transition);
}

.fb-site-radio-label:hover,
.fb-site-checkbox-label:hover {
    border-color: var(--fb-site-accent);
    background: var(--fb-site-accent-glow);
}

.fb-site-radio-label input[type="radio"],
.fb-site-checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--fb-site-accent);
    cursor: pointer;
    flex-shrink: 0;
}

/* ── ERROR MESSAGES ─────────────────────────────────────────────────── */
.fb-site-error {
    display: none;
    font-size: 12.5px;
    color: var(--fb-site-danger);
    margin-top: 5px;
    font-weight: 500;
}

.fb-site-field.has-error .fb-site-error { display: block; }

/* ── SUBMIT BUTTON ──────────────────────────────────────────────────── */
.fb-site-submit-row {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 8px;
    padding-top: 24px;
    border-top: 1px solid var(--fb-site-border);
}

.fb-site-submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 32px;
    background: linear-gradient(135deg, var(--fb-site-accent), #8b5cf6);
    color: white;
    border: none;
    border-radius: var(--fb-site-radius);
    font-size: 15px;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: all var(--fb-site-transition);
    box-shadow: 0 4px 15px rgba(99,102,241,0.4);
    letter-spacing: 0.01em;
}

.fb-site-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99,102,241,0.5);
}

.fb-site-submit-btn:active { transform: translateY(0); }

.fb-site-submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* ── SUCCESS MESSAGE ────────────────────────────────────────────────── */
.fb-site-success-card {
    background: var(--fb-site-surface);
    border: 1px solid var(--fb-site-border);
    border-radius: 16px;
    box-shadow: var(--fb-site-shadow);
    padding: 48px 36px;
    text-align: center;
    animation: fb-site-success-bounce 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes fb-site-success-bounce {
    from { opacity: 0; transform: scale(0.9); }
    to   { opacity: 1; transform: scale(1); }
}

.fb-site-success-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--fb-site-success), #34d399);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    margin: 0 auto 24px;
    box-shadow: 0 8px 24px rgba(16,185,129,0.3);
    animation: fb-site-success-pulse 2s infinite;
}

@keyframes fb-site-success-pulse {
    0%, 100% { box-shadow: 0 8px 24px rgba(16,185,129,0.3); }
    50%       { box-shadow: 0 8px 32px rgba(16,185,129,0.5); }
}

.fb-site-success-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--fb-site-text);
    margin: 0 0 10px;
}

.fb-site-success-msg {
    font-size: 15px;
    color: var(--fb-site-text-muted);
    line-height: 1.6;
    margin: 0;
}

/* ── RESPONSIVE ─────────────────────────────────────────────────────── */
@media (max-width: 640px) {
    .fb-site-form-header { padding: 24px 20px; }
    .fb-site-form-body   { padding: 24px 20px; }
    .fb-site-form-title  { font-size: 20px; }
    .fb-site-success-card { padding: 32px 20px; }
}