/**
 * Samle Design System
 * Professional B2B SaaS Platform - Urban Planning
 * 
 * Design Principles:
 * - Consistency
 * - Clarity
 * - Restraint
 * - Professional
 * - Scandinavian/Nordic aesthetic
 */

/* ============================================
   CSS VARIABLES (Design Tokens)
   ============================================ */

:root {
    /* Primary Colors - Professional Teal (Brand Color) */
    --color-primary: #006B7D;
    --color-primary-dark: #004D5A;
    --color-primary-light: #E0F2F5;
    --color-primary-gradient: linear-gradient(135deg, #006B7D 0%, #004D5A 100%);
    
    /* Secondary Colors - Neutral Grays */
    --color-secondary: #6B7280;
    --color-secondary-light: #F3F4F6;
    
    /* Accent - Success/Actions (using teal for consistency) */
    --color-accent: #006B7D;
    --color-accent-dark: #004D5A;
    
    /* Status Colors */
    --color-status-draft: #9CA3AF;
    --color-status-active: #3B82F6;
    --color-status-completed: #059669;
    --color-status-error: #DC2626;
    --color-status-warning: #F59E0B;
    
    /* Text Colors */
    --color-text-primary: #1f2937;
    --color-text-secondary: #6B7280;
    --color-text-muted: #9CA3AF;
    
    /* Borders & Backgrounds */
    --color-border: #e5e7eb;
    --color-border-light: #F3F4F6;
    --color-background: #FFFFFF;
    --color-background-page: #f9fafb;
    --color-background-subtle: #f9fafb;
    --color-background-muted: #F3F4F6;
    --color-background-neutral: #f9fafb;
    
    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Spacing */
    --spacing-xs: 0.25rem;        /* 4px */
    --spacing-sm: 0.5rem;         /* 8px */
    --spacing-md: 1rem;           /* 16px */
    --spacing-lg: 1.5rem;         /* 24px */
    --spacing-xl: 2rem;           /* 32px */
    --spacing-2xl: 3rem;          /* 48px */
    
    /* Border Radius */
    --radius-sm: 0.25rem;         /* 4px */
    --radius-md: 0.375rem;        /* 6px */
    --radius-lg: 0.5rem;          /* 8px */
    --radius-card: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-card: 0 10px 25px rgba(0, 0, 0, 0.05);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
}

/* ============================================
   BASE STYLES
   ============================================ */

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-background-page);
    margin: 0;
    padding: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-weight: 600;
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

p {
    margin: 0 0 var(--spacing-md) 0;
    line-height: var(--line-height-relaxed);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Utility Classes */
.text-primary {
    color: var(--color-text-primary);
}

.text-secondary {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

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

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1.5;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    font-family: var(--font-family-base);
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    text-decoration: none;
}

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

.btn-secondary:hover {
    background-color: var(--color-background-subtle);
    border-color: var(--color-text-secondary);
    text-decoration: none;
}

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

.btn-accent:hover {
    background-color: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    text-decoration: none;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: var(--font-size-base);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================
   BADGES
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-draft {
    background-color: var(--color-background-muted);
    color: var(--color-status-draft);
}

.badge-active {
    background-color: #DBEAFE;
    color: #1E40AF;
}

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

.badge-archived {
    background-color: var(--color-background-muted);
    color: var(--color-text-secondary);
}

/* Legacy status class mappings for backward compatibility */
.status-draft,
.status-submitted {
    background-color: var(--color-background-muted);
    color: var(--color-status-draft);
}

.status-active,
.status-in_progress,
.status-under_review {
    background-color: #DBEAFE;
    color: #1E40AF;
}

.status-completed,
.status-approved {
    background-color: #D1FAE5;
    color: #065F46;
}

.status-archived {
    background-color: var(--color-background-muted);
    color: var(--color-text-secondary);
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--color-background);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: var(--spacing-lg);
    transition: box-shadow var(--transition-fast);
}

.card:hover {
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
}

.card-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}

.card-footer {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
}

.card-body {
    color: var(--color-text-primary);
}

/* ============================================
   LAYOUT
   ============================================ */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.page-header {
    background: var(--color-primary-dark);
    color: white;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.page-title {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.page-description {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin: 0;
}

/* Grid Layouts */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ============================================
   UTILITIES
   ============================================ */

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

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

.hidden { display: none; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}