/* CSS RESET AND BASE STYLES */
* {
    box-sizing: border-box;
}

/* ROOT VARIABLES FOR CONSISTENT THEMING */
:root {
    /* Ukrainian flag colors */
    --ukraine-blue: #0057b7;
    --ukraine-yellow: #ffd700;
    
    /* Base colors */
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-light: #ffffff;
    --text-dark: #000000;
    
    /* Semantic colors */
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    
    /* Job status colors */
    --job-full: #e8f5e8;
    --job-partial: #fff8e1;
    --job-understaffed: #ffebee;
    
    /* Borders and shadows */
    --border-color: #ddd;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
}

/* BASE TYPOGRAPHY */
html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    margin: 0;
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.4;
}

/* SEMANTIC TEXT CLASSES */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-light { color: var(--text-light); }
.text-dark { color: var(--text-dark); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }

/* HEADINGS */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    margin-top: 0;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 1.5rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.1rem; }

/* LAYOUT COMPONENTS */
.container {
    max-width: 100%;
    margin: 0 auto;
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

/* BUTTONS */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    min-height: 44px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.btn-primary {
    background-color: var(--ukraine-blue);
    color: var(--ukraine-yellow);
    border-color: var(--ukraine-yellow);
}

.btn-primary:hover {
    background-color: var(--ukraine-yellow);
    color: var(--text-dark);
    border-color: var(--ukraine-blue);
}

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

.btn-success {
    background-color: var(--success);
    color: var(--text-light);
    border-color: var(--success);
}

.btn-danger {
    background-color: var(--danger);
    color: var(--text-light);
    border-color: var(--danger);
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.85rem;
    min-height: 36px;
}

/* FORM ELEMENTS */
input, select, textarea {
    width: 100%;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--ukraine-blue);
    box-shadow: 0 0 0 2px rgba(0, 87, 183, 0.25);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
}

/* ALERTS */
.alert {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: 6px;
    font-weight: 500;
    white-space: pre-line;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* UTILITY CLASSES */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* TEXT COLOR UTILITIES */
.text-muted { color: var(--text-secondary); }
.text-body { color: var(--text-primary); }
.text-white { color: #ffffff; }

/* FONT WEIGHT UTILITIES */
.fw-medium { font-weight: 500; }
.fw-semibold { font-weight: 600; }
.fw-bold { font-weight: 700; }

/* FONT SIZE UTILITIES */
.fs-xs { font-size: 0.8rem; }
.fs-sm { font-size: 0.875rem; }
.fs-lg { font-size: 1.1rem; }
.fs-xl { font-size: 1.2rem; }
.fs-2xl { font-size: 1.6rem; }
.fs-display { font-size: 2rem; }

/* PADDING UTILITIES */
.p-1 { padding: 8px; }
.p-2 { padding: 15px; }
.p-3 { padding: 20px; }
.p-4 { padding: 30px; }
.px-2 { padding-left: 15px; padding-right: 15px; }
.px-3 { padding-left: 20px; padding-right: 20px; }
.py-2 { padding-top: 15px; padding-bottom: 15px; }
.py-3 { padding-top: 20px; padding-bottom: 20px; }

/* MARGIN UTILITIES (extend mt/mb 0-3) */
.mt-4 { margin-top: 30px; }
.mb-4 { margin-bottom: 30px; }
.my-3 { margin-top: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.my-4 { margin-top: 30px; margin-bottom: 30px; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* GAP UTILITIES */
.gap-1 { gap: 8px; }
.gap-2 { gap: 12px; }
.gap-3 { gap: 20px; }
.gap-4 { gap: 30px; }

/* DISPLAY UTILITIES */
.d-flex { display: flex; }
.d-grid { display: grid; }
.d-inline-flex { display: inline-flex; }
.d-inline-block { display: inline-block; }
.d-none { display: none; }

/* FLEXBOX UTILITIES */
.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }

/* BORDER RADIUS UTILITIES */
.rounded { border-radius: 8px; }
.rounded-sm { border-radius: 4px; }
.rounded-pill { border-radius: 20px; }
.rounded-full { border-radius: 50%; }

/* SHADOW UTILITIES */
.shadow-sm { box-shadow: 0 2px 4px rgba(0,0,0,0.1); }

/* BACKGROUND UTILITIES */
.bg-white { background-color: var(--bg-secondary); }
.bg-surface { background-color: #f8f9fa; }

/* TEXT TRANSFORM UTILITIES */
.text-uppercase { text-transform: uppercase; letter-spacing: 0.5px; }
.font-mono { font-family: monospace; }
.italic { font-style: italic; }
/* Emoji look wrong when slanted — the glyph is a picture, not a letterform, so a
   synthetic oblique distorts it rather than styling it. Wrap any emoji that sits
   inside italic text in this class. */
.emoji { font-style: normal; }


/* Ukrainian flag SVG in page chrome (issue #68) — replaces the 🇺🇦 emoji,
   which Windows renders as the letters "UA" (no glyphs for regional-indicator
   pairs in Segoe UI Emoji). Sized in em so it follows the surrounding text. */
.ua-flag {
    display: inline-block;
    width: 1.15em;
    height: calc(1.15em * 2 / 3);
    vertical-align: -0.08em;
    margin-right: 0.15em;
    border-radius: 2px;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.18);
}

[data-theme="dark"] .ua-flag {
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.22);
}