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

:root {
    /* Cores principais */
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --secondary-color: #764ba2;
    --success-color: #48bb78;
    --error-color: #f56565;
    --warning-color: #ed8936;

    /* Cores neutras */
    --bg-color: #f7fafc;
    --card-bg: #ffffff;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --border-color: #e2e8f0;

    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8f9ff 100%);

    /* Sombras */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);

    /* Tipografia */
    --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-12: 3rem;
    --spacing-16: 4rem;

    /* Raios de borda */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* Estilos base */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gradient-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-4);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

.header-content {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.header-icon {
    font-size: 3rem;
    color: white;
    margin-bottom: var(--spacing-4);
    display: block;
}

.header-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-2);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-subtitle {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
}

/* Main Content */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
    padding: var(--spacing-4) 0;
}

/* Cards */
.card {
    background: var(--gradient-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    overflow: hidden;
    backdrop-filter: blur(20px);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-5) var(--spacing-6);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.card-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.card-body {
    padding: var(--spacing-6);
}

/* Form */
.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-5);
}

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

.label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.input {
    padding: var(--spacing-4);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: all 0.3s ease;
    background: white;
    color: var(--text-primary);
}

.input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input::placeholder {
    color: var(--text-secondary);
}

/* Botões */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.btn::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 0.5s;
}

.btn:hover::before {
    left: 100%;
}

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

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

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #38a169);
    color: white;
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: linear-gradient(135deg, #718096, #4a5568);
    color: white;
    box-shadow: var(--shadow-md);
}

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

/* Resultado */
.result-section {
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.qr-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-6);
}

.qr-container {
    background: white;
    padding: var(--spacing-4);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.qr-image {
    max-width: 300px;
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

.qr-info {
    text-align: center;
    width: 100%;
}

.qr-url {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-4);
    font-weight: 500;
    word-break: break-all;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.qr-actions {
    display: flex;
    gap: var(--spacing-3);
    justify-content: center;
    flex-wrap: wrap;
}

/* Loading */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-8);
    text-align: center;
    color: white;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

    100% {
        transform: rotate(360deg);
    }
}

/* Mensagem de erro */
.error-message {
    background: rgba(245, 101, 101, 0.9);
    color: white;
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    box-shadow: var(--shadow-md);
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-6) 0;
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
}

.footer i {
    color: #f56565;
}

/* Responsividade */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-2);
    }

    .header-content {
        padding: var(--spacing-6);
    }

    .header-title {
        font-size: var(--font-size-3xl);
    }

    .header-subtitle {
        font-size: var(--font-size-base);
    }

    .card-body {
        padding: var(--spacing-4);
    }

    .qr-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .qr-image {
        max-width: 250px;
    }
}

@media (max-width: 480px) {
    .header-title {
        font-size: var(--font-size-2xl);
    }

    .qr-image {
        max-width: 200px;
    }

    .qr-display {
        gap: var(--spacing-4);
    }
}

/* Efeitos especiais */
.btn:active {
    transform: translateY(0);
}

.card:hover {
    transform: translateY(-2px);
    transition: transform 0.3s ease;
}

.input:hover {
    border-color: rgba(102, 126, 234, 0.5);
}

/* Scrollbar personalizada */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}