:root {
    --primary-color: #2D60FF;
    --primary-hover: #1E46CB;
    --bg-color: #F8F9FA;
    --card-bg: #FFFFFF;
    --text-main: #1C1C1E;
    --text-muted: #8E8E93;
    --border-color: #E5E5EA;
    --positive-color: #34C759;
    --positive-bg: #E8F8EE;
    --negative-color: #FF3B30;
    --negative-bg: #FFEBEB;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --border-radius-lg: clamp(12px, 2vw, 16px);
    --border-radius-md: clamp(8px, 1.5vw, 12px);
    --border-radius-sm: clamp(6px, 1vw, 8px);
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.02);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.05);

    /* Clamp sizing for dynamic fonts across resolutions */
    --font-xs: clamp(10px, 1vw + 6px, 12px);
    --font-sm: clamp(12px, 1.2vw + 8px, 14px);
    --font-md: clamp(14px, 1.5vw + 10px, 16px);
    --font-lg: clamp(16px, 2vw + 12px, 20px);
    --font-xl: clamp(20px, 2.5vw + 14px, 24px);
    --font-xxl: clamp(28px, 4vw + 16px, 40px);

    --container-padding: clamp(16px, 3vw, 24px);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-main);
    font-size: var(--font-md);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden; /* Evita rolagem horizontal */
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    object-fit: cover;
    display: block;
}

/* Touch targets: min 44x44px for accessibility */
button, .btn, .nav-item, .icon-btn, .tab, .change-btn, .btn-primary, .btn-sm {
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Header / Topbar */
.topbar {
    background: var(--card-bg);
    padding: clamp(12px, 2vw, 16px) 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.topbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: clamp(8px, 1vw, 12px);
    font-weight: 700;
    font-size: var(--font-lg);
    color: var(--text-main);
}

.logo-icon {
    width: clamp(28px, 3vw, 32px);
    height: clamp(28px, 3vw, 32px);
    background: var(--primary-color);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-sm);
}

/* Search Bar (Mobile hidden, toggled or in flex on Desktop) */
.search-bar {
    display: none;
    flex: 1;
    max-width: 400px;
    margin: 0 clamp(16px, 2vw, 24px);
    position: relative;
}

.search-bar input {
    width: 100%;
    min-height: 44px; /* Touch friendly */
    padding: 10px 16px 10px 40px;
    border-radius: 22px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    font-size: var(--font-sm);
    outline: none;
    transition: all 0.2s;
}

.search-bar input:focus {
    border-color: var(--primary-color);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(45, 96, 255, 0.1);
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.topbar-actions {
    display: none; /* Mobile first: hidden, use hamburger */
    align-items: center;
    gap: clamp(8px, 1vw, 16px);
}

/* Hamburger Menu Mobile */
.hamburger-btn {
    display: flex;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: var(--font-xl);
}

/* Dashboard Layout */
.dashboard-content {
    padding: clamp(24px, 4vw, 32px) 0 clamp(80px, 10vw, 100px); /* Padding for mobile nav */
    width: 100%;
}

/* Balance Area */
.balance-section {
    text-align: center;
    margin-bottom: clamp(24px, 4vw, 32px);
}

.balance-title {
    font-size: var(--font-sm);
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.balance-amount {
    font-size: var(--font-xxl);
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 4px;
}

.balance-currency {
    font-size: var(--font-md);
    color: var(--text-muted);
    font-weight: 500;
}

/* Circular Shortcuts */
.shortcuts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
    gap: clamp(12px, 2vw, 24px);
    margin-bottom: clamp(32px, 5vw, 40px);
    justify-items: center;
}

.shortcut-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: transform 0.2s;
    text-align: center;
}

.shortcut-icon {
    width: clamp(48px, 8vw, 56px);
    height: clamp(48px, 8vw, 56px);
    background: var(--card-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-xl);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.shortcut-label {
    font-size: var(--font-xs);
    font-weight: 500;
    color: var(--text-main);
}

/* Cards Area */
.cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(12px, 2vw, 16px);
    margin-bottom: clamp(32px, 5vw, 40px);
}

.card {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: clamp(16px, 3vw, 24px);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    transition: box-shadow 0.2s, transform 0.2s;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-title {
    font-size: var(--font-md);
    font-weight: 600;
    margin-bottom: 8px;
}

.card-subtitle {
    font-size: var(--font-sm);
    color: var(--text-muted);
}

.card-highlight {
    font-size: var(--font-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-top: 16px;
}

.card-icon-bg {
    position: absolute;
    right: -10px;
    bottom: -10px;
    font-size: clamp(60px, 10vw, 80px);
    opacity: 0.1;
    color: var(--primary-color);
}

/* Tabs */
.tabs {
    display: flex;
    gap: clamp(16px, 3vw, 24px);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}
.tabs::-webkit-scrollbar { display: none; }

.tab {
    padding: 12px 0;
    font-size: var(--font-md);
    font-weight: 600;
    color: var(--text-muted);
    position: relative;
    white-space: nowrap;
}

.tab.active {
    color: var(--text-main);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px 3px 0 0;
}

/* Responsive Table Mobile First */
.market-section {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: clamp(16px, 3vw, 24px);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.coin-table-wrapper table {
    width: 100%;
    border-collapse: collapse;
}

/* Mobile: Cards layout for tables */
.coin-table-wrapper thead {
    display: none; /* Hide header on mobile */
}

.coin-table-wrapper tr {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 16px;
    margin-bottom: 12px;
    gap: 12px;
}

.coin-table-wrapper td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: none;
    padding: 0;
}

/* Data-label for mobile view */
.coin-table-wrapper td::before {
    content: attr(data-label);
    font-weight: 600;
    font-size: var(--font-xs);
    color: var(--text-muted);
    display: block;
    min-width: 100px; /* Alinha labels */
}

.coin-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    justify-content: flex-end;
}

.coin-icon {
    width: clamp(28px, 4vw, 32px);
    height: clamp(28px, 4vw, 32px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-xs);
    font-weight: bold;
}

.coin-name {
    font-weight: 600;
    font-size: var(--font-sm);
}

.coin-pair {
    font-size: var(--font-xs);
    color: var(--text-muted);
    margin-left: 4px;
}

.price {
    font-weight: 600;
    font-size: var(--font-sm);
}

.change-btn {
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: var(--font-sm);
    min-width: 90px;
    text-align: center;
}

.change-btn.positive {
    background: var(--positive-bg);
    color: var(--positive-color);
}

.change-btn.negative {
    background: var(--negative-bg);
    color: var(--negative-color);
}

/* Mobile Footer Navigation */
.mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    padding: 8px 0; /* Padding menor com touch target nos botões */
    z-index: 1000;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
    /* Handle safe areas for iPhone X+ */
    padding-bottom: env(safe-area-inset-bottom, 8px);
}

.nav-item {
    flex-direction: column;
    gap: 4px;
    color: var(--text-muted);
    font-size: var(--font-xs);
    width: 25%;
}

.nav-item.active {
    color: var(--primary-color);
}

.nav-item i {
    font-size: var(--font-lg);
}

/* Mobile Overlay Menu */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
    display: none; /* Hidden by default */
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-menu-overlay.active {
    display: block;
    opacity: 1;
}

.mobile-menu-panel {
    position: fixed;
    top: 0;
    right: -100%;
    width: clamp(250px, 80%, 400px);
    height: 100vh;
    background: var(--card-bg);
    z-index: 2001;
    transition: right 0.3s ease;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.mobile-menu-panel.active {
    right: 0;
}

.mobile-menu-close {
    align-self: flex-end;
    font-size: var(--font-xl);
    background: none;
    border: none;
    color: var(--text-main);
}

/* Admin Styles Mobile First */
.admin-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    padding: clamp(16px, 3vw, 24px);
}

.admin-card {
    background: var(--card-bg);
    padding: clamp(24px, 5vw, 40px);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    width: 100%;
    max-width: 400px;
    margin: auto;
}

.form-group {
    margin-bottom: clamp(16px, 3vw, 20px);
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: var(--font-sm);
}

.form-control {
    width: 100%;
    min-height: 44px; /* Touch friendly */
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-sm);
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
    background: var(--card-bg);
}

.form-control:focus {
    border-color: var(--primary-color);
}

.btn-primary {
    width: 100%;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: var(--font-md);
    font-weight: 600;
    transition: background 0.2s;
}

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

.alert {
    padding: clamp(12px, 2vw, 16px);
    border-radius: var(--border-radius-sm);
    margin-bottom: 20px;
    font-size: var(--font-sm);
    width: 100%;
}
.alert-error {
    background: var(--negative-bg);
    color: var(--negative-color);
}
.alert-success {
    background: var(--positive-bg);
    color: var(--positive-color);
}

/* Admin Grid Layouts */
.form-grid {
    display: grid;
    grid-template-columns: 1fr; /* Mobile first: 1 column */
    gap: clamp(12px, 2vw, 16px);
}


/* Media Queries para diversas resoluções (Mobile First Approach) */

/* 480px: Landscape Phones & Small Tablets */
@media (min-width: 480px) {
    .shortcuts {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    }
}

/* 768px: Tablets Portrait */
@media (min-width: 768px) {
    .hamburger-btn { display: none; }
    .search-bar { display: block; }
    .topbar-actions { display: flex; }
    .mobile-nav { display: none; }
    
    .dashboard-content { padding-bottom: clamp(40px, 5vw, 60px); }
    
    .cards-grid {
        grid-template-columns: 2fr 1fr 1fr;
    }

    .form-grid {
        grid-template-columns: repeat(2, 1fr); /* 2 cols admin form */
    }

    /* Restaurar Tabela Tradicional */
    .coin-table-wrapper thead {
        display: table-header-group;
    }
    
    .coin-table-wrapper tr {
        display: table-row;
        border: none;
        margin-bottom: 0;
    }

    .coin-table-wrapper td, 
    .coin-table-wrapper th {
        display: table-cell;
        padding: clamp(12px, 2vw, 16px);
        border-bottom: 1px solid var(--border-color);
        text-align: left;
    }

    .coin-table-wrapper td::before {
        display: none; /* Hide data-label on desktop */
    }

    .coin-info {
        justify-content: flex-start;
    }
}

/* 1024px: Tablets Landscape & Laptops */
@media (min-width: 1024px) {
    .cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    /* Aumentar area para search */
    .search-bar {
        max-width: 500px;
    }
}

/* 1280px & 1366px & 1440px: Desktops */
@media (min-width: 1280px) {
    .cards-grid {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

/* 1600px & 1920px & 2560px: Ultra Wide & 4K */
@media (min-width: 1600px) {
    .container {
        max-width: 1400px; /* Expand container on very large screens */
    }
    
    .cards-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

/* Layout do Admin Actions para alinhar os botões lado a lado no desktop */
.admin-actions-cell {
    display: flex;
    gap: 8px;
    flex-wrap: wrap; /* Wrap se não couber */
    justify-content: flex-end; /* Mobile defaults to end via flex-end on td */
}

@media (min-width: 768px) {
    .admin-actions-cell {
        justify-content: flex-start;
    }
}

.btn-deposit {
    background: var(--primary-color);
    color: white;
    padding: 0 clamp(16px, 2vw, 24px);
    border-radius: 22px; /* min-height covers 44px */
    font-weight: 600;
    font-size: var(--font-sm);
    transition: background 0.2s;
    border: none;
}

.btn-deposit:hover {
    background: var(--primary-hover);
}

.icon-btn {
    color: var(--text-main);
    font-size: var(--font-lg);
    background: none;
    border: none;
    transition: color 0.2s;
}

.icon-btn:hover {
    color: var(--primary-color);
}