/* ==========================================
   Coffee Vending System - Main Site Styles
   ========================================== */

/* CSS Variables for Color Scheme */
:root {
    /* Primary Colors */
    --primary-color: #0d6efd;
    --primary-hover: #0b5ed7;
    --primary-light: #cfe2ff;
    
    /* Secondary Colors */
    --secondary-color: #6c757d;
    --secondary-hover: #5c636a;
    
    /* Success Colors */
    --success-color: #198754;
    --success-hover: #157347;
    --success-light: #d1e7dd;
    
    /* Warning Colors */
    --warning-color: #ffc107;
    --warning-hover: #ffca2c;
    --warning-light: #fff3cd;
    
    /* Danger Colors */
    --danger-color: #dc3545;
    --danger-hover: #bb2d3b;
    --danger-light: #f8d7da;
    
    /* Info Colors */
    --info-color: #0dcaf0;
    --info-hover: #0aa2c0;
    --info-light: #cff4fc;
    
    /* Neutral Colors */
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    /* Typography */
    --font-family-base: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 1rem;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.25rem;
    --line-height-base: 1.5;
    
    /* Spacing */
    --spacer: 1rem;
    --spacer-sm: 0.5rem;
    --spacer-lg: 1.5rem;
    
    /* Borders */
    --border-color: #dee2e6;
    --border-radius: 0.375rem;
    --border-radius-lg: 0.5rem;
    
    /* Shadows */
    --box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --box-shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
    
    /* Transitions */
    --transition-base: all 0.3s ease;
}

/* Reset and Base Styles */
* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--dark-color);
    background-color: var(--light-color);
    margin: 0;
    padding: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-weight: 600;
    line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-top: 0;
    margin-bottom: 1rem;
}

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

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

/* Utility Classes */
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--secondary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-info { color: var(--info-color) !important; }

.bg-primary { background-color: var(--primary-color) !important; }
.bg-secondary { background-color: var(--secondary-color) !important; }
.bg-success { background-color: var(--success-color) !important; }
.bg-warning { background-color: var(--warning-color) !important; }
.bg-danger { background-color: var(--danger-color) !important; }
.bg-info { background-color: var(--info-color) !important; }

/* Spacing Utilities */
.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--spacer-sm) !important; }
.mt-2 { margin-top: var(--spacer) !important; }
.mt-3 { margin-top: var(--spacer-lg) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--spacer-sm) !important; }
.mb-2 { margin-bottom: var(--spacer) !important; }
.mb-3 { margin-bottom: var(--spacer-lg) !important; }

.pt-0 { padding-top: 0 !important; }
.pt-1 { padding-top: var(--spacer-sm) !important; }
.pt-2 { padding-top: var(--spacer) !important; }
.pt-3 { padding-top: var(--spacer-lg) !important; }

.pb-0 { padding-bottom: 0 !important; }
.pb-1 { padding-bottom: var(--spacer-sm) !important; }
.pb-2 { padding-bottom: var(--spacer) !important; }
.pb-3 { padding-bottom: var(--spacer-lg) !important; }

/* Display Utilities */
.d-none { display: none !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }

/* Flex Utilities */
.flex-row { flex-direction: row !important; }
.flex-column { flex-direction: column !important; }
.justify-content-start { justify-content: flex-start !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-end { justify-content: flex-end !important; }
.justify-content-between { justify-content: space-between !important; }
.align-items-start { align-items: flex-start !important; }
.align-items-center { align-items: center !important; }
.align-items-end { align-items: flex-end !important; }

/* Width Utilities */
.w-25 { width: 25% !important; }
.w-50 { width: 50% !important; }
.w-75 { width: 75% !important; }
.w-100 { width: 100% !important; }

/* Text Utilities */
.text-start { text-align: left !important; }
.text-center { text-align: center !important; }
.text-end { text-align: right !important; }
.text-wrap { white-space: normal !important; }
.text-nowrap { white-space: nowrap !important; }
.text-break { word-wrap: break-word !important; }

/* Font Size Utilities */
.fs-1 { font-size: 2.5rem !important; }
.fs-2 { font-size: 2rem !important; }
.fs-3 { font-size: 1.75rem !important; }
.fs-4 { font-size: 1.5rem !important; }
.fs-5 { font-size: 1.25rem !important; }
.fs-6 { font-size: 1rem !important; }

/* Font Weight Utilities */
.fw-light { font-weight: 300 !important; }
.fw-normal { font-weight: 400 !important; }
.fw-bold { font-weight: 700 !important; }

/* Border Utilities */
.border { border: 1px solid var(--border-color) !important; }
.border-0 { border: 0 !important; }
.border-top { border-top: 1px solid var(--border-color) !important; }
.border-bottom { border-bottom: 1px solid var(--border-color) !important; }
.border-start { border-left: 1px solid var(--border-color) !important; }
.border-end { border-right: 1px solid var(--border-color) !important; }

/* Shadow Utilities */
.shadow-sm { box-shadow: var(--box-shadow-sm) !important; }
.shadow { box-shadow: var(--box-shadow) !important; }
.shadow-lg { box-shadow: var(--box-shadow-lg) !important; }
.shadow-none { box-shadow: none !important; }

/* Position Utilities */
.position-relative { position: relative !important; }
.position-absolute { position: absolute !important; }
.position-fixed { position: fixed !important; }
.position-sticky { position: sticky !important; }

/* Button Utilities */
.btn {
    display: inline-block;
    font-weight: 400;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition-base);
}

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

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

.btn-success {
    color: #fff;
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-success:hover {
    color: #fff;
    background-color: var(--success-hover);
    border-color: var(--success-hover);
}

.btn-danger {
    color: #fff;
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

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

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

.btn-outline-primary:hover {
    color: #fff;
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Card Utilities */
.card {
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-sm);
    margin-bottom: 1rem;
}

.card-header {
    padding: 1rem;
    background-color: var(--light-color);
    border-bottom: 1px solid var(--border-color);
    border-top-left-radius: calc(var(--border-radius) - 1px);
    border-top-right-radius: calc(var(--border-radius) - 1px);
}

.card-body {
    padding: 1rem;
}

.card-footer {
    padding: 1rem;
    background-color: var(--light-color);
    border-top: 1px solid var(--border-color);
    border-bottom-left-radius: calc(var(--border-radius) - 1px);
    border-bottom-right-radius: calc(var(--border-radius) - 1px);
}

/* Responsive Utilities */
@media (max-width: 575.98px) {
    .d-sm-none { display: none !important; }
    .d-sm-block { display: block !important; }
}

@media (min-width: 576px) and (max-width: 767.98px) {
    .d-md-none { display: none !important; }
    .d-md-block { display: block !important; }
}

@media (min-width: 768px) and (max-width: 991.98px) {
    .d-lg-none { display: none !important; }
    .d-lg-block { display: block !important; }
}

@media (min-width: 992px) {
    .d-xl-none { display: none !important; }
    .d-xl-block { display: block !important; }
}