:root {
    --background: #f8fafc;
    --surface: #ffffff;
    --primary: #0ea5e9;
    --primary-light: #e0f2fe;
    --secondary: #10b981;
    --secondary-light: #d1fae5;
    --text: #334155;
    --text-light: #64748b;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --error: #ef4444;
    --error-light: #fef2f2;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 1.25rem;
}

h1, h2, h3 {
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
}

h1 { 
    font-size: 1.8rem; 
}

h2 { 
    font-size: 1.4rem; 
}

h3 {
    font-size: 1.1rem;
    color: var(--primary);
}

p {
    color: var(--text-light);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto 1.25rem;
    padding: 1.5rem;
    background-color: var(--surface);
    border-radius: 0.75rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}

/* Header e Logo */
header.container {
    text-align: center;
}

.logo-container {
    display: flex;
    justify-content: center;
    width: 100%;
    padding: 20px 0;
}

.logo {
    max-width: 200px;
    height: auto;
}

/* Layout principal */
.main-content-layout {
    display: flex;
    gap: 2.5rem;
    align-items: stretch;
}

/* Painel do editor */
.editor-panel {
    flex: 0 0 280px;
    padding: 1.25rem;
    border-radius: 0.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow-y: auto;
    max-height: 80vh;
}

/* Painel do gráfico */
.chart-panel {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    padding: 1rem 1rem 2rem;
    position: relative;
    min-height: 500px;
    max-height: 80vh;
    transition: padding 0.3s ease;
}

.chart-panel canvas {
    max-width: 100% !important;
    height: auto !important;
    display: block;
    margin: 0 auto;
}

/* Seção PIX */
.pix-section {
    background: var(--surface);
    border-radius: 0.75rem;
    padding: 1.25rem;
    margin: 1.25rem auto 0;
    text-align: center;
    border: 1px solid var(--border);
    max-width: 600px;
}

.pix-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    margin-bottom: 0.9375rem;
}

.pix-icon {
    color: var(--secondary);
    font-size: 1.2rem;
}

.pix-title {
    color: var(--text);
    margin-bottom: 0;
}

.pix-description {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.pix-key-container {
    background: var(--border-light);
    border-radius: 0.5rem;
    padding: 0.9375rem;
    margin: 0.9375rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border: 1px solid var(--border);
}

.pix-key {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    color: var(--text);
    word-break: break-all;
    text-align: left;
    padding: 0 0.625rem;
    flex: 1;
}

.copy-pix-btn {
    background: var(--secondary);
    color: white;
    border: none;
    padding: 0.5rem 0.9375rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.3125rem;
    transition: background 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
}

.copy-pix-btn:hover {
    background: #059669;
}

.copy-pix-btn:focus {
    outline: 2px solid var(--secondary);
    outline-offset: 2px;
}

/* Ações do gráfico */
.chart-actions {
    margin-top: auto;
    width: 100%;
    padding-top: 1.25rem;
}

/* Botões */
#save-btn, #export-btn {
    width: 100%;
    border: none;
    padding: 0.7rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    font-family: var(--font-family);
}

#save-btn {
    background: var(--secondary);
    color: white;
}

#save-btn:hover {
    background: #059669;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

#save-btn:focus {
    outline: 2px solid var(--secondary);
    outline-offset: 2px;
}

#export-btn {
    background: #8b5cf6;
    color: white;
}

#export-btn:hover {
    background: #7c3aed;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.3);
}

#export-btn:focus {
    outline: 2px solid #8b5cf6;
    outline-offset: 2px;
}

/* Grupos de input */
.input-group {
    margin-bottom: 1rem;
}

.input-group label {
    margin-bottom: 0.3rem;
    font-weight: 500;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.input-group input[type="text"],
.input-group input[type="number"],
.input-group select {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    background: white;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    font-family: var(--font-family);
}

.input-group select {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2364748b'%3E%3Cpath fill-rule='evenodd' 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' clip-rule='evenodd' /%3E%3C/svg%3E") no-repeat right 0.75rem center / 1.5em;
    padding-right: 2.5rem;
}

.input-group input[type="text"]:focus,
.input-group input[type="number"]:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.input-group input[type="color"] {
    padding: 0.1875rem;
    height: 2.5rem;
    width: 100%;
    cursor: pointer;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.input-group input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.input-group input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 0.25rem;
}

.input-group input[type="color"]::-moz-color-swatch {
    border: none;
    border-radius: 0.25rem;
}

.input-group input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
    transform: scale(1.2);
    accent-color: var(--primary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

/* Validação de campos */
.input-group input.field-invalid {
    border-color: var(--error);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.field-error-message {
    color: var(--error);
    font-size: 0.75rem;
    margin-top: 0.25rem;
    padding: 0.25rem 0.5rem;
    background: var(--error-light);
    border: 1px solid var(--error);
    border-radius: 0.25rem;
    display: block;
    font-weight: 500;
}

/* Grupos de opções */
.options-group {
    padding-top: 1rem;
    margin-top: 1rem;
    border-top: 1px solid var(--border-light);
}

.input-group-inline {
    display: flex;
    gap: 0.75rem;
}

.input-group-inline .input-group {
    flex: 1;
    margin-bottom: 0;
}

/* Seletor de gráfico */
.graph-selector {
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
}

.graph-selector h3 {
    margin-bottom: 1rem;
}

/* Título do painel */
#panel-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-light);
}

/* Botões do painel */
.panel-buttons {
    margin-top: auto;
    padding-top: 1rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 1.25rem;
    margin-top: auto;
    background: var(--surface);
    color: var(--text-light);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 0.75rem;
}

/* Social Section - Instagram */
.social-section {
    text-align: center;
    margin: 2rem 0;
}

.social-section a {
    text-decoration: none;
    color: inherit;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.social-section i.fab.fa-instagram {
    font-size: 2rem;
    color: #E1306C;
    vertical-align: middle;
}

.social-section strong {
    color: #E1306C;
}

/* Utilitários */
.hidden {
    display: none !important;
}

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

/* Media Queries para Responsividade */
@media (max-width: 900px) {
    .main-content-layout {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .editor-panel {
        flex: none;
        width: 100%;
        order: 2;
        max-height: none;
    }
    
    .chart-panel {
        order: 1;
    }
}

@media (max-width: 600px) {
    body {
        padding: 0.75rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .container {
        padding: 1rem;
    }
    
    .chart-panel {
        padding-bottom: 3rem;
        min-height: 450px;
        max-height: none;
    }
    
    .pix-key-container {
        flex-direction: column;
        gap: 0.625rem;
    }
    
    .pix-key {
        text-align: center;
        word-break: break-all;
    }
    
    .copy-pix-btn {
        width: 100%;
        justify-content: center;
    }
    
    .input-group-inline {
        flex-direction: column;
        gap: 1rem;
    }
    
    .input-group-inline .input-group {
        margin-bottom: 1rem;
    }
    
    .logo {
        max-width: 150px;
    }
}