/* ============================================================
   Digital Form AI - Form Style Themes
   5 Default Design Styles with animations & interactions
   ============================================================ */

/* ============================================================
   STYLE 1: Modern (Tailwind-like clean utility design)
   ============================================================ */
.dfai-style-modern .dfai-form-wrapper,
.dfai-style-modern.dfai-form-wrapper {
    --dfai-f-primary: #3b82f6;
    --dfai-f-primary-hover: #2563eb;
    --dfai-f-bg: #ffffff;
    --dfai-f-text: #111827;
    --dfai-f-text-secondary: #6b7280;
    --dfai-f-border: #d1d5db;
    --dfai-f-radius: 8px;
    --dfai-f-shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    background: var(--dfai-f-bg);
    border-radius: var(--dfai-f-radius);
    box-shadow: var(--dfai-f-shadow);
    padding: 2rem;
    border: 1px solid #e5e7eb;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.dfai-style-modern .dfai-form-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e7eb;
}
.dfai-style-modern .dfai-form-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dfai-f-text);
    letter-spacing: -0.025em;
    margin: 0 0 0.25rem;
}
.dfai-style-modern .dfai-form-desc {
    color: var(--dfai-f-text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.dfai-style-modern .dfai-fields-grid {
    gap: 1.25rem;
}

.dfai-style-modern .dfai-field-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: #374151;
    margin-bottom: 0.375rem;
}

.dfai-style-modern .dfai-field-input {
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--dfai-f-border);
    border-radius: 6px;
    font-size: 0.875rem;
    color: var(--dfai-f-text);
    background: #fff;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    outline: none;
}
.dfai-style-modern .dfai-field-input:hover {
    border-color: #9ca3af;
}
.dfai-style-modern .dfai-field-input:focus {
    border-color: var(--dfai-f-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.dfai-style-modern .dfai-checkbox-label,
.dfai-style-modern .dfai-radio-label {
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.875rem;
    transition: background 0.15s ease;
}
.dfai-style-modern .dfai-checkbox-label:hover,
.dfai-style-modern .dfai-radio-label:hover {
    background: #f3f4f6;
}

.dfai-style-modern .dfai-submit-btn {
    background: var(--dfai-f-primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    width: 100%;
}
.dfai-style-modern .dfai-submit-btn:hover {
    background: var(--dfai-f-primary-hover);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.dfai-style-modern .dfai-submit-btn:active {
    transform: scale(0.98);
}

.dfai-style-modern .dfai-form-message {
    border-radius: 6px;
    font-size: 0.875rem;
    animation: dfaiSlideDown 0.3s ease;
}
.dfai-style-modern .dfai-field-wrap {
    animation: dfaiFieldFadeIn 0.4s ease both;
}
.dfai-style-modern .dfai-field-wrap:nth-child(1) { animation-delay: 0.05s; }
.dfai-style-modern .dfai-field-wrap:nth-child(2) { animation-delay: 0.1s; }
.dfai-style-modern .dfai-field-wrap:nth-child(3) { animation-delay: 0.15s; }
.dfai-style-modern .dfai-field-wrap:nth-child(4) { animation-delay: 0.2s; }
.dfai-style-modern .dfai-field-wrap:nth-child(5) { animation-delay: 0.25s; }
.dfai-style-modern .dfai-field-wrap:nth-child(6) { animation-delay: 0.3s; }
.dfai-style-modern .dfai-field-wrap:nth-child(n+7) { animation-delay: 0.35s; }

/* Empty state */
.dfai-style-modern .dfai-empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: #9ca3af;
}
.dfai-style-modern .dfai-empty-state::before {
    content: '📋';
    display: block;
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

/* ============================================================
   STYLE 2: Bold (Bootstrap-like structured design)
   ============================================================ */
.dfai-style-bold .dfai-form-wrapper,
.dfai-style-bold.dfai-form-wrapper {
    --dfai-f-primary: #0d6efd;
    --dfai-f-primary-hover: #0b5ed7;
    --dfai-f-bg: #ffffff;
    --dfai-f-text: #212529;
    --dfai-f-text-secondary: #6c757d;
    --dfai-f-border: #ced4da;
    --dfai-f-radius: 6px;
    --dfai-f-shadow: 0 0.5rem 1rem rgba(0,0,0,0.08);
    background: var(--dfai-f-bg);
    border-radius: var(--dfai-f-radius);
    box-shadow: var(--dfai-f-shadow);
    padding: 2rem;
    border: 1px solid rgba(0,0,0,0.125);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}

.dfai-style-bold .dfai-form-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #e9ecef;
}
.dfai-style-bold .dfai-form-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dfai-f-text);
    margin: 0 0 0.5rem;
}
.dfai-style-bold .dfai-form-desc {
    color: var(--dfai-f-text-secondary);
    font-size: 1rem;
    line-height: 1.5;
}

.dfai-style-bold .dfai-fields-grid {
    gap: 1rem;
}

.dfai-style-bold .dfai-field-label {
    font-size: 1rem;
    font-weight: 600;
    color: #212529;
    margin-bottom: 0.5rem;
}

.dfai-style-bold .dfai-field-input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--dfai-f-border);
    border-radius: var(--dfai-f-radius);
    font-size: 1rem;
    color: var(--dfai-f-text);
    background: #fff;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    outline: none;
}
.dfai-style-bold .dfai-field-input:focus {
    border-color: #86b7fe;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.dfai-style-bold .dfai-checkbox-label,
.dfai-style-bold .dfai-radio-label {
    padding: 0.5rem 0.75rem;
    border: 1px solid #e9ecef;
    border-radius: var(--dfai-f-radius);
    margin-bottom: 0;
    font-size: 1rem;
    transition: background 0.15s, border-color 0.15s;
}
.dfai-style-bold .dfai-checkbox-label:hover,
.dfai-style-bold .dfai-radio-label:hover {
    background: #f8f9fa;
    border-color: #dee2e6;
}
.dfai-style-bold .dfai-checkbox-label input:checked + span,
.dfai-style-bold .dfai-radio-label input:checked + span {
    color: var(--dfai-f-primary);
}

.dfai-style-bold .dfai-submit-btn {
    background: var(--dfai-f-primary);
    color: #fff;
    border: 1px solid var(--dfai-f-primary);
    border-radius: var(--dfai-f-radius);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
    width: 100%;
    text-transform: none;
}
.dfai-style-bold .dfai-submit-btn:hover {
    background: var(--dfai-f-primary-hover);
    border-color: var(--dfai-f-primary-hover);
}
.dfai-style-bold .dfai-submit-btn:focus {
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}
.dfai-style-bold .dfai-submit-btn:active {
    background: #0a58ca;
}

/* Grouped fields with color-coded sections */
.dfai-style-bold .dfai-field-wrap {
    padding: 0.75rem;
    border-radius: var(--dfai-f-radius);
    transition: background 0.2s ease;
}
.dfai-style-bold .dfai-field-wrap:hover {
    background: #f8f9fa;
}

.dfai-style-bold .dfai-form-message {
    border-radius: var(--dfai-f-radius);
    border-left: 4px solid;
    font-size: 1rem;
}
.dfai-style-bold .dfai-form-message.success {
    border-left-color: #198754;
}
.dfai-style-bold .dfai-form-message.error {
    border-left-color: #dc3545;
}

.dfai-style-bold .dfai-empty-state {
    text-align: center;
    padding: 3rem 1rem;
    background: #f8f9fa;
    border-radius: var(--dfai-f-radius);
    color: #6c757d;
}

/* ============================================================
   STYLE 3: Glass (Glassmorphism with blur, translucency)
   ============================================================ */
.dfai-style-glass .dfai-form-wrapper,
.dfai-style-glass.dfai-form-wrapper {
    --dfai-f-primary: #8b5cf6;
    --dfai-f-primary-hover: #7c3aed;
    --dfai-f-bg: rgba(255, 255, 255, 0.08);
    --dfai-f-text: #f8fafc;
    --dfai-f-text-secondary: #cbd5e1;
    --dfai-f-border: rgba(255, 255, 255, 0.18);
    --dfai-f-radius: 16px;
    --dfai-f-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #4c1d95 100%);
    border-radius: var(--dfai-f-radius);
    box-shadow: var(--dfai-f-shadow), inset 0 1px 0 rgba(255,255,255,0.1);
    padding: 2rem;
    border: 1px solid var(--dfai-f-border);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--dfai-f-text);
    position: relative;
    overflow: hidden;
}
.dfai-style-glass .dfai-form-wrapper::before,
.dfai-style-glass.dfai-form-wrapper::before {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(139,92,246,0.3), transparent 70%);
    top: -50px;
    right: -50px;
    pointer-events: none;
    animation: dfaiGlassOrb 6s ease-in-out infinite alternate;
}
.dfai-style-glass .dfai-form-wrapper::after,
.dfai-style-glass.dfai-form-wrapper::after {
    content: '';
    position: absolute;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59,130,246,0.25), transparent 70%);
    bottom: -40px;
    left: -40px;
    pointer-events: none;
    animation: dfaiGlassOrb 8s ease-in-out infinite alternate-reverse;
}

.dfai-style-glass .dfai-form-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.15);
    position: relative;
    z-index: 1;
}
.dfai-style-glass .dfai-form-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 0.25rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}
.dfai-style-glass .dfai-form-desc {
    color: rgba(255,255,255,0.75);
    font-size: 0.875rem;
    line-height: 1.5;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.dfai-style-glass .dfai-fields-grid {
    position: relative;
    z-index: 1;
}

.dfai-style-glass .dfai-field-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: rgba(255,255,255,0.95);
    margin-bottom: 0.375rem;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}
.dfai-style-glass .dfai-required { color: #f472b6; }

.dfai-style-glass .dfai-field-input {
    padding: 0.75rem 1rem;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 10px;
    font-size: 0.875rem;
    color: #fff;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(8px);
    transition: all 0.3s ease;
    outline: none;
}
.dfai-style-glass .dfai-field-input::placeholder { color: rgba(255,255,255,0.45); }
.dfai-style-glass .dfai-field-input:hover {
    border-color: rgba(255,255,255,0.3);
    background: rgba(255,255,255,0.16);
}
.dfai-style-glass .dfai-field-input:focus {
    border-color: var(--dfai-f-primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.25), 0 0 20px rgba(139,92,246,0.15);
    background: rgba(255,255,255,0.16);
}



.dfai-style-glass .dfai-checkbox-label,
.dfai-style-glass .dfai-radio-label {
    color: rgba(255,255,255,0.85);
    border-radius: 8px;
    transition: background 0.2s;
}
.dfai-style-glass .dfai-checkbox-label:hover,
.dfai-style-glass .dfai-radio-label:hover {
    background: rgba(255,255,255,0.08);
}
.dfai-style-glass .dfai-checkbox-label input,
.dfai-style-glass .dfai-radio-label input {
    accent-color: var(--dfai-f-primary);
}

.dfai-style-glass .dfai-form-actions {
    position: relative;
    z-index: 1;
}
.dfai-style-glass .dfai-submit-btn {
    background: linear-gradient(135deg, var(--dfai-f-primary), #6366f1);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(139,92,246,0.3);
    width: 100%;
    position: relative;
    overflow: hidden;
}
.dfai-style-glass .dfai-submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    transition: left 0.5s ease;
}
.dfai-style-glass .dfai-submit-btn:hover::before {
    left: 100%;
}
.dfai-style-glass .dfai-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(139,92,246,0.4);
}
.dfai-style-glass .dfai-submit-btn:active {
    transform: translateY(0);
}

.dfai-style-glass .dfai-form-message {
    border-radius: 10px;
    background: rgba(255,255,255,0.1) !important;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.15) !important;
    position: relative;
    z-index: 1;
}
.dfai-style-glass .dfai-form-message.success { color: #4ade80; }
.dfai-style-glass .dfai-form-message.error { color: #f87171; }

.dfai-style-glass .dfai-field-wrap {
    animation: dfaiGlassFadeIn 0.5s ease both;
}
.dfai-style-glass .dfai-field-wrap:nth-child(1) { animation-delay: 0.05s; }
.dfai-style-glass .dfai-field-wrap:nth-child(2) { animation-delay: 0.1s; }
.dfai-style-glass .dfai-field-wrap:nth-child(3) { animation-delay: 0.15s; }
.dfai-style-glass .dfai-field-wrap:nth-child(4) { animation-delay: 0.2s; }
.dfai-style-glass .dfai-field-wrap:nth-child(5) { animation-delay: 0.25s; }
.dfai-style-glass .dfai-field-wrap:nth-child(6) { animation-delay: 0.3s; }
.dfai-style-glass .dfai-field-wrap:nth-child(n+7) { animation-delay: 0.35s; }

/* ============================================================
   STYLE 4: Elegant (Futuristic & Professional)
   ============================================================ */
.dfai-style-elegant .dfai-form-wrapper,
.dfai-style-elegant.dfai-form-wrapper {
    --dfai-f-primary: #c084fc;
    --dfai-f-primary-hover: #a855f7;
    --dfai-f-bg: #0f172a;
    --dfai-f-surface: #1e293b;
    --dfai-f-text: #f1f5f9;
    --dfai-f-text-secondary: #94a3b8;
    --dfai-f-border: #334155;
    --dfai-f-radius: 12px;
    --dfai-f-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    background: var(--dfai-f-bg);
    border-radius: var(--dfai-f-radius);
    box-shadow: var(--dfai-f-shadow);
    padding: 2.5rem;
    border: 1px solid var(--dfai-f-border);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--dfai-f-text);
    position: relative;
    overflow: hidden;
}
.dfai-style-elegant .dfai-form-wrapper::before,
.dfai-style-elegant.dfai-form-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #c084fc, #818cf8, #38bdf8, #a78bfa);
    background-size: 200% 100%;
    animation: dfaiGradientBar 3s linear infinite;
}

.dfai-style-elegant .dfai-form-header {
    margin-bottom: 2rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--dfai-f-border);
}
.dfai-style-elegant .dfai-form-title {
    font-size: 1.625rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.025em;
    margin: 0 0 0.5rem;
    background: linear-gradient(135deg, #c084fc, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.dfai-style-elegant .dfai-form-desc {
    color: var(--dfai-f-text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.dfai-style-elegant .dfai-fields-grid {
    gap: 1.25rem;
}

.dfai-style-elegant .dfai-field-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--dfai-f-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}
.dfai-style-elegant .dfai-required { color: #f472b6; }

.dfai-style-elegant .dfai-field-input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--dfai-f-border);
    border-radius: 8px;
    font-size: 0.9375rem;
    color: var(--dfai-f-text);
    background: var(--dfai-f-surface);
    transition: all 0.25s ease;
    outline: none;
}
.dfai-style-elegant .dfai-field-input::placeholder {
    color: #475569;
}
.dfai-style-elegant .dfai-field-input:hover {
    border-color: #475569;
}
.dfai-style-elegant .dfai-field-input:focus {
    border-color: var(--dfai-f-primary);
    box-shadow: 0 0 0 3px rgba(192, 132, 252, 0.15), 0 0 15px rgba(192,132,252,0.08);
}



.dfai-style-elegant .dfai-checkbox-label,
.dfai-style-elegant .dfai-radio-label {
    color: var(--dfai-f-text);
    padding: 0.625rem 0.75rem;
    border-radius: 8px;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}
.dfai-style-elegant .dfai-checkbox-label:hover,
.dfai-style-elegant .dfai-radio-label:hover {
    background: rgba(192, 132, 252, 0.06);
    border-color: var(--dfai-f-border);
}
.dfai-style-elegant .dfai-checkbox-label input,
.dfai-style-elegant .dfai-radio-label input {
    accent-color: var(--dfai-f-primary);
}

.dfai-style-elegant .dfai-submit-btn {
    background: linear-gradient(135deg, #a855f7, #6366f1);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.875rem 2rem;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(168, 85, 247, 0.3);
    width: 100%;
    letter-spacing: 0.025em;
    position: relative;
    overflow: hidden;
}
.dfai-style-elegant .dfai-submit-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
    transition: width 0.6s ease, height 0.6s ease;
    transform: translate(-50%, -50%);
}
.dfai-style-elegant .dfai-submit-btn:hover::after {
    width: 300px;
    height: 300px;
}
.dfai-style-elegant .dfai-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(168, 85, 247, 0.4);
}
.dfai-style-elegant .dfai-submit-btn:active {
    transform: translateY(0);
}

/* Color-coded field groups */
.dfai-style-elegant .dfai-field-wrap {
    padding: 0.75rem;
    border-radius: 8px;
    border-left: 3px solid transparent;
    transition: all 0.25s ease;
    animation: dfaiElegantSlideIn 0.5s ease both;
}
.dfai-style-elegant .dfai-field-wrap:hover {
    background: rgba(192, 132, 252, 0.04);
    border-left-color: var(--dfai-f-primary);
}
.dfai-style-elegant .dfai-field-wrap:nth-child(3n+1) { --dfai-accent: #c084fc; animation-delay: 0.05s; }
.dfai-style-elegant .dfai-field-wrap:nth-child(3n+2) { --dfai-accent: #818cf8; animation-delay: 0.1s; }
.dfai-style-elegant .dfai-field-wrap:nth-child(3n+3) { --dfai-accent: #38bdf8; animation-delay: 0.15s; }
.dfai-style-elegant .dfai-field-wrap:hover {
    border-left-color: var(--dfai-accent, var(--dfai-f-primary));
}

.dfai-style-elegant .dfai-form-message {
    border-radius: 8px;
    background: var(--dfai-f-surface) !important;
    border: 1px solid var(--dfai-f-border) !important;
}
.dfai-style-elegant .dfai-form-message.success { color: #4ade80; border-left: 3px solid #4ade80 !important; }
.dfai-style-elegant .dfai-form-message.error { color: #f87171; border-left: 3px solid #f87171 !important; }

.dfai-style-elegant .dfai-empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: #475569;
}
.dfai-style-elegant .dfai-empty-state::before {
    content: '✦';
    display: block;
    font-size: 2rem;
    margin-bottom: 0.75rem;
    color: var(--dfai-f-primary);
}

/* ============================================================
   STYLE 5: Classic (Traditional, timeless design)
   ============================================================ */
.dfai-style-classic .dfai-form-wrapper,
.dfai-style-classic.dfai-form-wrapper {
    --dfai-f-primary: #b45309;
    --dfai-f-primary-hover: #92400e;
    --dfai-f-bg: #fffbeb;
    --dfai-f-text: #1c1917;
    --dfai-f-text-secondary: #57534e;
    --dfai-f-border: #d6d3d1;
    --dfai-f-radius: 4px;
    --dfai-f-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    background: var(--dfai-f-bg);
    border-radius: var(--dfai-f-radius);
    box-shadow: var(--dfai-f-shadow);
    padding: 2rem;
    border: 1px solid #d6d3d1;
    font-family: Georgia, 'Times New Roman', serif;
    color: var(--dfai-f-text);
}

.dfai-style-classic .dfai-form-header {
    margin-bottom: 1.75rem;
    padding-bottom: 1.25rem;
    border-bottom: 2px solid #d6d3d1;
    text-align: center;
}
.dfai-style-classic .dfai-form-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dfai-f-text);
    margin: 0 0 0.5rem;
    font-family: Georgia, serif;
    font-style: italic;
}
.dfai-style-classic .dfai-form-desc {
    color: var(--dfai-f-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    font-style: italic;
}

.dfai-style-classic .dfai-fields-grid {
    gap: 1.25rem;
}

.dfai-style-classic .dfai-field-label {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--dfai-f-text);
    margin-bottom: 0.5rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
.dfai-style-classic .dfai-required { color: #dc2626; }

.dfai-style-classic .dfai-field-input {
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--dfai-f-border);
    border-radius: var(--dfai-f-radius);
    font-size: 0.9375rem;
    color: var(--dfai-f-text);
    background: #fff;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    outline: none;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
.dfai-style-classic .dfai-field-input:hover {
    border-color: #a8a29e;
}
.dfai-style-classic .dfai-field-input:focus {
    border-color: var(--dfai-f-primary);
    box-shadow: 0 0 0 2px rgba(180, 83, 9, 0.15);
}



.dfai-style-classic .dfai-checkbox-label,
.dfai-style-classic .dfai-radio-label {
    color: var(--dfai-f-text);
    padding: 0.375rem 0;
    font-size: 0.9375rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
.dfai-style-classic .dfai-checkbox-label:hover,
.dfai-style-classic .dfai-radio-label:hover {
    background: transparent;
    color: var(--dfai-f-primary);
}
.dfai-style-classic .dfai-checkbox-label input,
.dfai-style-classic .dfai-radio-label input {
    accent-color: var(--dfai-f-primary);
}

.dfai-style-classic .dfai-submit-btn {
    background: var(--dfai-f-primary);
    color: #fff;
    border: none;
    border-radius: var(--dfai-f-radius);
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
    box-shadow: none;
    width: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    letter-spacing: 0.025em;
}
.dfai-style-classic .dfai-submit-btn:hover {
    background: var(--dfai-f-primary-hover);
}
.dfai-style-classic .dfai-submit-btn:active {
    background: #78350f;
}

.dfai-style-classic .dfai-field-wrap {
    padding-bottom: 0.5rem;
    border-bottom: 1px dashed #e7e5e4;
    transition: border-color 0.2s;
}
.dfai-style-classic .dfai-field-wrap:last-child {
    border-bottom: none;
}
.dfai-style-classic .dfai-field-wrap:hover {
    border-bottom-color: var(--dfai-f-primary);
}

.dfai-style-classic .dfai-form-message {
    border-radius: var(--dfai-f-radius);
    border: 1px solid;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.dfai-style-classic .dfai-empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--dfai-f-text-secondary);
    font-style: italic;
}

/* ============================================================
   SHARED ANIMATIONS
   ============================================================ */
@keyframes dfaiFieldFadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes dfaiSlideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes dfaiGlassOrb {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(-15px, 15px) scale(1.1); }
}

@keyframes dfaiGlassFadeIn {
    from {
        opacity: 0;
        transform: translateY(12px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes dfaiGradientBar {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

@keyframes dfaiElegantSlideIn {
    from {
        opacity: 0;
        transform: translateX(-12px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ============================================================
   INTERACTIVE HOVER EFFECTS (ALL STYLES)
   ============================================================ */
.dfai-form-wrapper[class*="dfai-style-"] .dfai-field-input,
[class*="dfai-style-"] .dfai-field-input {
    will-change: border-color, box-shadow;
}

/* Loading spinner for submit button */
.dfai-form-wrapper[class*="dfai-style-"] .dfai-submit-btn.dfai-loading,
[class*="dfai-style-"] .dfai-submit-btn.dfai-loading {
    pointer-events: none;
    opacity: 0.8;
    position: relative;
}
.dfai-form-wrapper[class*="dfai-style-"] .dfai-submit-btn.dfai-loading::after,
[class*="dfai-style-"] .dfai-submit-btn.dfai-loading::after {
    content: '';
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    display: inline-block;
    margin-left: 8px;
    vertical-align: middle;
    animation: dfaiSpin 0.6s linear infinite;
}

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

/* ============================================================
   MOBILE RESPONSIVE (ALL STYLES)
   ============================================================ */
@media (max-width: 768px) {
    .dfai-style-modern .dfai-form-wrapper,
    .dfai-style-modern.dfai-form-wrapper,
    .dfai-style-bold .dfai-form-wrapper,
    .dfai-style-bold.dfai-form-wrapper,
    .dfai-style-glass .dfai-form-wrapper,
    .dfai-style-glass.dfai-form-wrapper,
    .dfai-style-elegant .dfai-form-wrapper,
    .dfai-style-elegant.dfai-form-wrapper,
    .dfai-style-classic .dfai-form-wrapper,
    .dfai-style-classic.dfai-form-wrapper {
        padding: 1.25rem;
    }

    .dfai-style-modern .dfai-form-title,
    .dfai-style-bold .dfai-form-title,
    .dfai-style-glass .dfai-form-title,
    .dfai-style-elegant .dfai-form-title,
    .dfai-style-classic .dfai-form-title {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .dfai-style-modern .dfai-form-wrapper,
    .dfai-style-modern.dfai-form-wrapper,
    .dfai-style-bold .dfai-form-wrapper,
    .dfai-style-bold.dfai-form-wrapper,
    .dfai-style-glass .dfai-form-wrapper,
    .dfai-style-glass.dfai-form-wrapper,
    .dfai-style-elegant .dfai-form-wrapper,
    .dfai-style-elegant.dfai-form-wrapper,
    .dfai-style-classic .dfai-form-wrapper,
    .dfai-style-classic.dfai-form-wrapper {
        padding: 1rem;
        border-radius: 8px;
    }

    .dfai-style-modern .dfai-submit-btn,
    .dfai-style-bold .dfai-submit-btn,
    .dfai-style-glass .dfai-submit-btn,
    .dfai-style-elegant .dfai-submit-btn,
    .dfai-style-classic .dfai-submit-btn {
        padding: 0.75rem 1rem;
        font-size: 0.9375rem;
    }
}