/* ==========================================
   DESIGN SYSTEM - Contrato Digital
   ========================================== */

:root {
    /* Cores Primárias */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    
    /* Cores de Suporte */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* Escala de Cinzas */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Cores de Fundo */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #ffffff;
    --bg-input: #f8fafc;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    
    /* Bordas */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Tipografia */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Espaçamento */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    
    /* Transições */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ==========================================
   RESET E BASE
   ========================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    background-attachment: fixed;
}

/* ==========================================
   LAYOUT PRINCIPAL
   ========================================== */

.page-wrapper {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: var(--space-6);
}

.contract-container {
    width: 100%;
    max-width: 800px;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   HEADER
   ========================================== */

.contract-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    padding: 0 var(--space-2);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.brand-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-2xl);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.brand-text h1 {
    color: white;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.025em;
}

.brand-text p {
    color: var(--gray-400);
    font-size: var(--font-size-sm);
    margin: 0;
    font-weight: 500;
}

.contract-meta .badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ==========================================
   CARD DO CONTRATO
   ========================================== */

.contract-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    margin-bottom: var(--space-6);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.contract-scroll {
    max-height: 400px;
    overflow-y: auto;
    padding: var(--space-8);
}

.contract-scroll::-webkit-scrollbar {
    width: 8px;
}

.contract-scroll::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius-full);
}

.contract-scroll::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
}

.contract-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

.contract-content h2 {
    color: var(--gray-900);
    font-size: var(--font-size-xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--primary);
    letter-spacing: -0.025em;
}

.contract-clauses {
    color: var(--gray-600);
    font-size: var(--font-size-sm);
    line-height: 1.8;
}

.lead {
    font-size: var(--font-size-base);
    color: var(--gray-700);
    margin-bottom: var(--space-6);
    text-align: justify;
}

.clause {
    margin-bottom: var(--space-5);
    padding-left: var(--space-4);
    border-left: 3px solid var(--primary-light);
}

.clause h4 {
    color: var(--gray-800);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.clause p {
    margin: 0;
    text-align: justify;
}

.acceptance-notice {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-top: var(--space-6);
    padding: var(--space-4);
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--info);
}

.acceptance-notice i {
    color: var(--info);
    font-size: var(--font-size-lg);
    margin-top: 2px;
}

.acceptance-notice p {
    margin: 0;
    color: #1e40af;
    font-weight: 500;
    font-size: var(--font-size-sm);
}

/* ==========================================
   SEÇÃO DE ASSINATURA
   ========================================== */

.signature-section {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-8);
    border: 1px solid var(--gray-200);
}

.signature-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

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

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-700);
}

.form-group label i {
    color: var(--primary);
    font-size: var(--font-size-sm);
}

.form-group input {
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-family: inherit;
    background: var(--bg-input);
    transition: all var(--transition-base);
}

.form-group input:hover {
    border-color: var(--gray-300);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input::placeholder {
    color: var(--gray-400);
}

/* ==========================================
   PAD DE ASSINATURA
   ========================================== */

.signature-pad-container {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 2px dashed var(--gray-300);
    transition: all var(--transition-base);
}

.signature-pad-container:hover {
    border-color: var(--primary-light);
    background: white;
}

.signature-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
    gap: var(--space-2);
}

.signature-header h3 {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-lg);
    color: var(--gray-800);
    font-weight: 600;
    margin: 0;
}

.signature-header h3 i {
    color: var(--primary);
}

.signature-hint {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
    font-weight: 500;
}

.canvas-wrapper {
    position: relative;
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

#signature-pad {
    width: 100%;
    height: 200px;
    display: block;
    cursor: crosshair;
    touch-action: none;
}

.canvas-placeholder {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--gray-400);
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.canvas-placeholder i {
    font-size: var(--font-size-2xl);
    opacity: 0.5;
}

.canvas-placeholder.hidden {
    opacity: 0;
}

.btn-clear {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding: var(--space-2) var(--space-4);
    background: white;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    color: var(--gray-600);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-clear:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
    color: var(--gray-700);
}

.btn-clear i {
    color: var(--danger);
}

/* ==========================================
   CHECKBOX DE TERMOS
   ========================================== */

/* ==========================================
   CHECKBOX CORRIGIDO
   ========================================== */

.terms-acceptance {
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.checkbox-wrapper {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    cursor: pointer;
    position: relative;
}

.checkbox-wrapper input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    width: 24px;
    height: 24px;
    min-width: 24px;
    background: white;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    margin-top: 2px;
    position: relative;
}

/* Check desenhado com CSS puro (não depende de FontAwesome) */
.checkmark::after {
    content: '';
    position: absolute;
    display: none;
    left: 7px;
    top: 3px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-wrapper input:checked ~ .checkmark {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-wrapper input:checked ~ .checkmark::after {
    display: block;
}

/* Hover effects */
.checkbox-wrapper:hover .checkmark {
    border-color: var(--primary-light);
}

.checkbox-wrapper input:focus ~ .checkmark {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.terms-text {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    line-height: 1.6;
    user-select: none;
}

/* ==========================================
   BOTÃO DE SUBMIT
   ========================================== */

.btn-submit {
    position: relative;
    width: 100%;
    padding: var(--space-4) var(--space-6);
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.4);
}

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

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

.btn-text, .btn-loader {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.btn-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
}

.btn-submit.loading .btn-text {
    opacity: 0;
}

.btn-submit.loading .btn-loader {
    opacity: 1;
}

/* ==========================================
   FOOTER
   ========================================== */

.contract-footer {
    margin-top: var(--space-6);
    text-align: center;
    padding: var(--space-6);
    color: var(--gray-400);
    font-size: var(--font-size-xs);
}

.contract-footer i {
    color: var(--success);
    margin-right: var(--space-1);
}

.contract-footer .timestamp {
    margin-top: var(--space-2);
    font-family: monospace;
    opacity: 0.7;
}

/* ==========================================
   RESPONSIVIDADE
   ========================================== */

@media (max-width: 640px) {
    .page-wrapper {
        padding: var(--space-4);
    }
    
    .contract-header {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .brand {
        flex-direction: column;
    }
    
    .contract-scroll {
        padding: var(--space-5);
        max-height: 300px;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .signature-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .signature-section {
        padding: var(--space-5);
    }
    
    .clause {
        padding-left: var(--space-3);
    }
}

@media (max-width: 480px) {
    .brand-icon {
        width: 48px;
        height: 48px;
        font-size: var(--font-size-xl);
    }
    
    .brand-text h1 {
        font-size: var(--font-size-xl);
    }
    
    .contract-content h2 {
        font-size: var(--font-size-lg);
    }
    
    #signature-pad {
        height: 160px;
    }
}

/* ==========================================
   ANIMAÇÕES ADICIONAIS
   ========================================== */

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.saving {
    animation: pulse 1.5s infinite;
}

/* Scrollbar personalizada para o contrato */
.contract-scroll::-webkit-scrollbar {
    width: 6px;
}

.contract-scroll::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 3px;
}

/* Foco visível para acessibilidade */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Melhoria para dispositivos de toque */
@media (hover: none) {
    .btn-submit:hover {
        transform: none;
    }
    
    .signature-pad-container:hover {
        border-color: var(--gray-300);
    }
}

.canvas-wrapper {
    position: relative;
    width: 100%;
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
}

#signature-pad {
    display: block;
    width: 100% !important;
    height: 200px !important;
    cursor: crosshair;
    touch-action: none; /* Importante para mobile */
}

/* ==========================================
   PÁGINA DE SUCESSO
   ========================================== */

.success-container {
    width: 100%;
    max-width: 600px;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-10);
    text-align: center;
    animation: fadeInUp 0.6s ease-out;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-6);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.4);
    animation: scaleIn 0.5s ease-out;
}

.success-icon i {
    font-size: var(--font-size-3xl);
    color: white;
}

@keyframes scaleIn {
    0% { transform: scale(0); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.success-container h1 {
    color: var(--gray-900);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-3);
    font-weight: 700;
}

.success-message {
    color: var(--gray-500);
    font-size: var(--font-size-base);
    margin-bottom: var(--space-8);
}

.contract-details {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin-bottom: var(--space-8);
    text-align: left;
    border: 1px solid var(--gray-200);
}

.detail-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--gray-200);
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-item .label {
    color: var(--gray-500);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.detail-item .value {
    color: var(--gray-800);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.detail-item .value.filename {
    font-family: monospace;
    color: var(--primary);
    font-size: var(--font-size-xs);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: white;
    color: var(--gray-600);
    border: 2px solid var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
    color: var(--gray-800);
}

.security-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    color: var(--success);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.security-info i {
    font-size: var(--font-size-base);
}

@media (max-width: 640px) {
    .success-container {
        padding: var(--space-6);
        margin: var(--space-4);
    }
    
    .detail-item {
        flex-direction: column;
        gap: var(--space-1);
    }
}

/* ==========================================
   BOTÃO COM SOM E ANIMAÇÃO
   ========================================== */

.btn-submit {
    position: relative;
    width: 100%;
    padding: var(--space-4) var(--space-6);
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-submit:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.4);
}

.btn-submit:active:not(:disabled) {
    transform: translateY(0) scale(0.98);
}

/* Estados do botão */
.btn-content,
.btn-loader,
.btn-success {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    transition: all var(--transition-base);
}

.btn-loader,
.btn-success {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    width: 100%;
}

/* Estado: Loading */
.btn-submit.loading .btn-content {
    opacity: 0;
    transform: scale(0.8);
}

.btn-submit.loading .btn-loader {
    opacity: 1;
}

/* Estado: Sucesso (após som) */
.btn-submit.success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.5);
}

.btn-submit.success .btn-content,
.btn-submit.success .btn-loader {
    opacity: 0;
}

.btn-submit.success .btn-success {
    opacity: 1;
    animation: successPop 0.4s ease;
}

@keyframes successPop {
    0% { transform: translate(-50%, -50%) scale(0); }
    50% { transform: translate(-50%, -50%) scale(1.2); }
    100% { transform: translate(-50%, -50%) scale(1); }
}

/* Overlay de sucesso (flash visual) */
.success-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(16, 185, 129, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 0;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.success-overlay.active {
    opacity: 1;
}

.success-overlay i {
    font-size: 80px;
    color: var(--success);
    transform: scale(0);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.success-overlay.active i {
    transform: scale(1);
}

.success-pulse {
    position: absolute;
    width: 100px;
    height: 100px;
    background: var(--success);
    border-radius: 50%;
    opacity: 0;
    transform: scale(0);
}

.success-overlay.active .success-pulse {
    animation: pulseRing 0.6s ease-out;
}

@keyframes pulseRing {
    0% {
        opacity: 0.5;
        transform: scale(0);
    }
    100% {
        opacity: 0;
        transform: scale(3);
    }
}

/* Efeito de ondulação no clique */
.btn-submit::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease, opacity 0.6s ease;
}

.btn-submit:active::after {
    width: 300px;
    height: 300px;
    opacity: 0;
}