/* Reset e configurações base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Cores principais */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* Cores neutras */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* 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;
    --font-size-4xl: 2.25rem;
    
    /* Espaçamentos */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    
    /* Bordas */
    --border-radius-sm: 0.375rem;
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transições */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
}

/* Configurações globais */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container principal */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-4);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: var(--spacing-8);
    padding: var(--spacing-6) 0;
}

.logo h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-2);
    letter-spacing: -0.025em;
}

.logo .tagline {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    font-weight: 500;
}

/* Conteúdo principal */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-8);
}

/* Card de verificação */
.verification-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-normal);
}

.verification-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.card-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.card-header .icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-radius: 50%;
    color: var(--white);
    margin: 0 auto var(--spacing-4);
    box-shadow: var(--shadow-lg);
}

.card-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-3);
}

.card-header p {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    max-width: 400px;
    margin: 0 auto;
}

/* Formulário */
.verification-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.input-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-700);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hash-input {
    width: 100%;
    padding: var(--spacing-4) var(--spacing-5);
    font-size: var(--font-size-lg);
    font-weight: 500;
    border: 2px solid var(--gray-300);
    border-radius: var(--border-radius-lg);
    background: var(--white);
    transition: all var(--transition-fast);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    letter-spacing: 0.05em;
}

.hash-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
    transform: translateY(-1px);
}

.hash-input::placeholder {
    color: var(--gray-400);
    font-weight: 400;
}

.input-hint {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    padding: var(--spacing-2) var(--spacing-3);
    background: var(--gray-50);
    border-radius: var(--border-radius);
}

.input-hint svg {
    flex-shrink: 0;
    opacity: 0.7;
}

/* Botão de verificação */
.verify-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3);
    width: 100%;
    padding: var(--spacing-5) var(--spacing-6);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--white);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.verify-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.verify-button:active {
    transform: translateY(0);
}

.verify-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-slow);
}

.verify-button:hover::before {
    left: 100%;
}

.button-icon {
    transition: transform var(--transition-fast);
}

.verify-button:hover .button-icon {
    transform: translateX(4px);
}

/* Seção de informações */
.info-section {
    margin-top: var(--spacing-8);
}

.info-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
}

.info-card h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-6);
    text-align: center;
}

.steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.step {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    font-weight: 600;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.step-content h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-2);
}

.step-content p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Página de erro */
.error-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-10);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.error-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--error-color), #dc2626);
    border-radius: 50%;
    color: var(--white);
    margin: 0 auto var(--spacing-6);
    box-shadow: var(--shadow-lg);
}

.error-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-4);
}

.error-message {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: var(--spacing-8);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.error-message strong {
    color: var(--error-color);
    font-weight: 600;
}

.error-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
    padding: var(--spacing-6);
    background: var(--gray-50);
    border-radius: var(--border-radius-lg);
}

.detail-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-base);
    color: var(--gray-700);
}

.detail-item svg {
    color: var(--warning-color);
    flex-shrink: 0;
}

/* Botões de ação */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
}

.primary-button, .secondary-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3);
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.primary-button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.primary-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.secondary-button {
    background: var(--white);
    color: var(--gray-700);
    border: 2px solid var(--gray-300);
}

.secondary-button:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
    transform: translateY(-1px);
}

/* Seção de ajuda */
.help-section {
    margin-top: var(--spacing-8);
}

.help-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
}

.help-card h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-6);
    text-align: center;
}

.help-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.help-step {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
}

.help-step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--warning-color);
    color: var(--white);
    border-radius: 50%;
    font-weight: 600;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.help-step-content h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-2);
}

.help-step-content p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Footer */
.footer {
    margin-top: auto;
    padding: var(--spacing-8) 0 var(--spacing-4);
    text-align: center;
    border-top: 1px solid var(--gray-200);
}

.footer p {
    color: var(--gray-500);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-2);
}

.footer-note {
    font-size: var(--font-size-xs);
    opacity: 0.8;
}

/* Responsividade - Tablet */
@media (min-width: 768px) {
    .container {
        padding: var(--spacing-6);
    }
    
    .verification-card {
        padding: var(--spacing-10);
    }
    
    .steps {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--spacing-8);
    }
    
    .help-steps {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--spacing-8);
    }
    
    .action-buttons {
        flex-direction: row;
        justify-content: center;
    }
    
    .error-details {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-4);
    }
}

/* Responsividade - Desktop */
@media (min-width: 1024px) {
    .container {
        padding: var(--spacing-8);
    }
    
    .main-content {
        max-width: 800px;
        margin: 0 auto;
    }
    
    .verification-card {
        padding: var(--spacing-12);
    }
    
    .error-card {
        padding: var(--spacing-12);
    }
    
    .steps {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .help-steps {
        grid-template-columns: repeat(3, 1fr);
    }
}

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.verification-card,
.error-card,
.info-card,
.help-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Estados de loading */
.verify-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
}

.verify-button.loading .button-text {
    opacity: 0;
}

.verify-button.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Acessibilidade */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus states para acessibilidade */
.verify-button:focus,
.primary-button:focus,
.secondary-button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.hash-input:focus {
    outline: none;
}

/* Print styles */
@media print {
    .verification-card,
    .error-card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
    
    .verify-button,
    .primary-button,
    .secondary-button {
        background: var(--gray-200) !important;
        color: var(--gray-800) !important;
    }
}