:root {
    /* Paleta de Cores SaaS - Refinada */
    --bg-primary: #F8FAFC;
    --bg-card: #FFFFFF;
    --bg-sidebar: #FFFFFF;
    --bg-overlay: rgba(15, 23, 42, 0.5);
    
    --border-color: #E2E8F0;
    
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    
    --color-primary: #2563EB;
    --color-primary-soft: #EFF6FF;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    
    --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);
    
    --sidebar-width: 280px;
    --header-height: 64px;

    /* Fluid Typography using clamp() */
    --font-xs: clamp(0.65rem, 0.6rem + 0.25vw, 0.75rem);
    --font-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
    --font-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
    --font-lg: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --font-xl: clamp(1.125rem, 1.05rem + 0.4vw, 1.25rem);
    --font-2xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
    --font-3xl: clamp(1.5rem, 1.35rem + 0.75vw, 1.875rem);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    font-size: var(--font-base);
}

/* Base Layout - Mobile First */
.app-wrapper {
    display: block;
    min-height: 100vh;
}

.main-container {
    width: 100%;
    min-height: 100vh;
    transition: all 0.3s ease;
}

.content-padding {
    padding: clamp(1rem, 3vw, 2rem);
    margin-top: var(--header-height);
}

/* Typography Helpers */
h1 { font-size: var(--font-3xl); font-weight: 800; margin-bottom: 1.5rem; letter-spacing: -0.025em; }
h2 { font-size: var(--font-2xl); font-weight: 700; margin-bottom: 1.25rem; letter-spacing: -0.025em; }
h3 { font-size: var(--font-xl); font-weight: 600; margin-bottom: 1rem; }
p { font-size: var(--font-sm); color: var(--text-secondary); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    font-size: var(--font-sm);
    font-weight: 600;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    gap: 0.5rem;
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: #1d4ed8;
}

.btn-secondary {
    background-color: white;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: #f1f5f9;
    border-color: #cbd5e1;
}

/* Responsive Table Container */
.table-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow-x: auto;
    box-shadow: var(--shadow-sm);
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px; /* Force scroll on small screens */
}

th {
    background: #F8FAFC;
    padding: 0.875rem 1rem;
    text-align: left;
    font-size: var(--font-xs);
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 1rem;
    font-size: var(--font-sm);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

tr:last-child td {
    border-bottom: none;
}

/* Utilities */
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-warning { color: var(--color-warning); }
.font-bold { font-weight: 700; }
.hidden { display: none; }

/* Flex & Grid Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 0.75rem; }
.gap-3 { gap: 1rem; }
.gap-4 { gap: 1.5rem; }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }