/**
 * Saldoanalys - Main Stylesheet
 * Design System: IBM Carbon inspired structure + Apple HIG clarity
 */

:root {
  --color-primary: #2563EB;
  --color-primary-hover: #1E4FCB;
  --color-secondary: #10B981;
  --color-danger: #DC2626;
  --color-warning: #F59E0B;
  --color-info: #0EA5E9;
  --color-bg: #F9FAFB;
  --color-surface: #FFFFFF;
  --color-border: #E5E7EB;
  --color-text: #1F2937;
  --color-text-light: #6B7280;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --font-family: Inter, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, sans-serif;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --radius-md: 8px;
}

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
}

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.main {
  padding: var(--space-8) 0;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

.btn {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
}

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

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

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.table th {
  text-align: left;
  padding: var(--space-3);
  border-bottom: 2px solid var(--color-border);
  font-weight: 600;
  background: #F9FAFB;
}

.table td {
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.table tr:hover {
  background: #F9FAFB;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.kpi-title {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-2);
}

.kpi-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-border);
  border-radius: 6px;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.badge {
  display: inline-block;
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 12px;
}

.badge-success {
  background: #D1FAE5;
  color: #065F46;
}

.badge-danger {
  background: #FEE2E2;
  color: #991B1B;
}

.text-right {
  text-align: right;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hidden {
  display: none;
}

/* Navigation */
.nav {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.nav-link {
  padding: var(--space-2) var(--space-4);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: 6px;
  transition: background-color 0.2s, color 0.2s;
}

.nav-link:hover {
  background: #F3F4F6;
  color: var(--color-primary);
}

.nav-link.active {
  background: var(--color-primary);
  color: white;
}

/* User Menu */
.user-menu {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.user-info {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.user-email {
  font-weight: 500;
  color: var(--color-text);
}

.btn-logout {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  background: transparent;
  color: var(--color-text-light);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-logout:hover {
  background: #FEE2E2;
  color: var(--color-danger);
  border-color: var(--color-danger);
}

/* Responsive Navigation */
/* Hamburger Menu Button */
.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger-menu span {
    width: 100%;
    height: 3px;
    background: #1F2937;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.hamburger-menu.active span:nth-child(1) {
    transform: translateY(10.5px) rotate(45deg);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active span:nth-child(3) {
    transform: translateY(-10.5px) rotate(-45deg);
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
    /* Show hamburger button */
    .hamburger-menu {
        display: flex;
    }
    
    /* Header layout */
    .header .header-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    
    .header .logo {
        order: 1;
    }
    
    .header .hamburger-menu {
        order: 2;
    }
    
    /* Mobile Nav Container */
    .header .nav,
    .landing-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: linear-gradient(180deg, #FFFFFF 0%, #F9FAFB 100%);
        box-shadow: -4px 0 24px rgba(0, 0, 0, 0.12);
        padding: 16px 0 0 0;
        margin: 0;
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        display: flex;
        flex-direction: column;
        gap: 4px;
        overflow-y: auto;
    }
    
    .header .nav.active,
    .landing-nav.active {
        right: 0;
    }
    
    /* Nav Link Styling */
    .header .nav-link,
    .landing-nav a {
        display: flex;
        align-items: center;
        padding: 16px 24px;
        margin: 0 8px;
        font-size: 15px;
        color: #4B5563;
        text-decoration: none;
        border-radius: 8px;
        transition: all 0.2s ease;
        font-weight: 500;
        background: transparent;
        border: none;
        position: relative;
    }
    
    .header .nav-link:hover,
    .landing-nav a:hover {
        background: #F3F4F6;
        color: #667eea;
        transform: translateX(-2px);
    }
    
    .header .nav-link:active,
    .landing-nav a:active {
        background: #E5E7EB;
        transform: translateX(-2px) scale(0.98);
    }
    
    /* Active/Current Page Styling */
    .header .nav-link[style*="font-weight: 700"],
    .header .nav-link[style*="font-weight:700"] {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        font-weight: 600;
        box-shadow: 0 2px 8px rgba(102, 126, 234, 0.25);
    }
    
    .header .nav-link[style*="font-weight: 700"]:hover,
    .header .nav-link[style*="font-weight:700"]:hover {
        background: linear-gradient(135deg, #5568d3 0%, #653a8b 100%);
        color: white;
        transform: translateX(-2px);
    }
    
    /* Add icons before links */
    .header .nav-link[href*="dashboard"]::before {
        content: "📊";
        margin-right: 12px;
        font-size: 18px;
    }
    
    .header .nav-link[href*="transactions"]::before {
        content: "💰";
        margin-right: 12px;
        font-size: 18px;
    }
    
    .header .nav-link[href*="vat"]::before {
        content: "📈";
        margin-right: 12px;
        font-size: 18px;
    }
    
    .header .nav-link[href*="preferences"]::before {
        content: "⚙️";
        margin-right: 12px;
        font-size: 18px;
    }
    
    .header .nav-link[href*="admin"]::before {
        content: "👤";
        margin-right: 12px;
        font-size: 18px;
    }
    
    /* User menu at bottom */
    .header .user-menu {
        margin-top: auto;
        padding: 20px 24px;
        border-top: 1px solid #E5E7EB;
        background: white;
    }
    
    /* Container padding on mobile */
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
    
    /* Cards on mobile */
    .card {
        padding: 16px;
        margin-bottom: 16px;
    }
    
    /* Buttons on mobile */
    .btn, .btn-primary, .btn-secondary {
        padding: 12px 20px;
        font-size: 16px;
        width: 100%;
        text-align: center;
    }
    
    /* Form inputs on mobile */
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="date"],
    select,
    textarea {
        font-size: 16px;
        padding: 12px;
    }
    
    /* Tables on mobile */
    table {
        font-size: 14px;
    }
    
    table th,
    table td {
        padding: 10px 8px;
    }
    
    /* Headers and titles */
    h1 {
        font-size: 28px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    h3 {
        font-size: 20px;
    }
    
    /* Modal adjustments */
    #transaction-modal .card,
    #settlement-modal > div {
        width: 95%;
        max-width: 95%;
        margin: 20px auto;
        padding: 20px;
    }
    
    /* Grid layouts stack on mobile */
    [style*="display: grid"] {
        grid-template-columns: 1fr !important;
    }
    
    /* Flex items wrap on mobile */
    [style*="display: flex"] {
        flex-wrap: wrap;
    }
}

/* Touch-friendly improvements for all screens */
button, a, .nav-link, .btn {
    -webkit-tap-highlight-color: rgba(102, 126, 234, 0.3);
    touch-action: manipulation;
}

/* Menu overlay for mobile */
body.menu-open::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}