/* 
 * Livvent Brand Stylesheet
 * Version: 1.0
 * Implements brand guidelines: Livvent Yellow #F1C40F, Charcoal Dark #2C3E50
 * UI Feel: Clean, Spacious, Platform-first (Stripe × Uber × Shopify)
 * file location: assets/css/style.css
 */

/* ============================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================ */
:root {
    /* ===== COLOR PALETTE ===== */
    /* Primary Brand Colors */
    --color-primary: #F1C40F;        /* Livvent Yellow */
    --color-primary-dark: #D4AC0D;   /* Darker Yellow */
    --color-primary-light: #F7DC6F;  /* Lighter Yellow */
    --color-primary-rgb: 241, 196, 15;
    
    --color-charcoal: #2C3E50;       /* Charcoal Dark */
    --color-charcoal-dark: #1C2833;  /* Darker Charcoal */
    --color-charcoal-light: #566573; /* Lighter Charcoal */
    --color-charcoal-rgb: 44, 62, 80;
    
    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-black: #000000;
    
    /* Semantic Colors */
    --color-success: #27AE60;
    --color-warning: #F39C12;
    --color-error: #E74C3C;
    --color-info: #3498DB;
    
    /* Background & Surface */
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #F8F9FA;
    --color-bg-tertiary: #ECF0F1;
    --color-bg-dark: var(--color-charcoal);
    
    /* Text Colors */
    --color-text-primary: var(--color-charcoal);
    --color-text-secondary: #566573;
    --color-text-tertiary: #7F8C8D;
    --color-text-light: #FFFFFF;
    --color-text-disabled: #BDC3C7;
    
    /* Border & Divider */
    --color-border: #E5E7EB;
    --color-border-light: #F1F2F6;
    --color-border-dark: #D5D8DC;
    
    /* Shadows (Minimal - per brand guidelines) */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-focus: 0 0 0 3px rgba(241, 196, 15, 0.2);
    
    /* ===== TYPOGRAPHY ===== */
    /* Font Families - Modern Sans Serif Stack */
    --font-family-primary: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-family-secondary: 'Poppins', 'Montserrat', 'Manrope', -apple-system, sans-serif;
    --font-family-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    
    /* Font Sizes (rem scale) */
    --text-xs: 0.75rem;    /* 12px */
    --text-sm: 0.875rem;   /* 14px */
    --text-base: 1rem;     /* 16px */
    --text-lg: 1.125rem;   /* 18px */
    --text-xl: 1.25rem;    /* 20px */
    --text-2xl: 1.5rem;    /* 24px */
    --text-3xl: 1.875rem;  /* 30px */
    --text-4xl: 2.25rem;   /* 36px */
    --text-5xl: 3rem;      /* 48px */
    --text-6xl: 3.75rem;   /* 60px */
    
    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* ===== SPACING & LAYOUT ===== */
    /* Spacing Scale (Based on 4px unit) */
    --space-0: 0;
    --space-1: 0.25rem;    /* 4px */
    --space-2: 0.5rem;     /* 8px */
    --space-3: 0.75rem;    /* 12px */
    --space-4: 1rem;       /* 16px */
    --space-5: 1.25rem;    /* 20px */
    --space-6: 1.5rem;     /* 24px */
    --space-8: 2rem;       /* 32px */
    --space-10: 2.5rem;    /* 40px */
    --space-12: 3rem;      /* 48px */
    --space-16: 4rem;      /* 64px */
    --space-20: 5rem;      /* 80px */
    
    /* Border Radius */
    --radius-sm: 0.25rem;   /* 4px */
    --radius-md: 0.5rem;    /* 8px */
    --radius-lg: 0.75rem;   /* 12px */
    --radius-xl: 1rem;      /* 16px */
    --radius-2xl: 1.5rem;   /* 24px */
    --radius-full: 9999px;  /* Full rounded */
    
    /* ===== TRANSITIONS & ANIMATIONS ===== */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-bounce: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* ===== Z-INDEX LAYERS ===== */
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-fixed: 30;
    --z-modal-backdrop: 40;
    --z-modal: 50;
    --z-popover: 60;
    --z-tooltip: 70;
    --z-toast: 80;
}

/* ============================================
   BASE STYLES & RESETS
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--text-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY SYSTEM
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-secondary);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--text-4xl);
    font-weight: var(--font-weight-bold);
}

h2 {
    font-size: var(--text-3xl);
}

h3 {
    font-size: var(--text-2xl);
}

h4 {
    font-size: var(--text-xl);
}

h5 {
    font-size: var(--text-lg);
}

h6 {
    font-size: var(--text-base);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

p {
    margin-bottom: var(--space-4);
    line-height: var(--line-height-normal);
}

.lead {
    font-size: var(--text-xl);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
}

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

.text-large {
    font-size: var(--text-lg);
}

/* Text Colors */
.text-primary {
    color: var(--color-primary);
}

.text-charcoal {
    color: var(--color-charcoal);
}

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

.text-tertiary {
    color: var(--color-text-tertiary);
}

.text-light {
    color: var(--color-text-light);
}

/* Text Alignment */
.text-center {
    text-align: center;
}

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

/* Font Weights */
.font-normal {
    font-weight: var(--font-weight-normal);
}

.font-medium {
    font-weight: var(--font-weight-medium);
}

.font-semibold {
    font-weight: var(--font-weight-semibold);
}

.font-bold {
    font-weight: var(--font-weight-bold);
}

/* ============================================
   BUTTONS - Primary UI Component
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-family-primary);
    font-size: var(--text-base);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    user-select: none;
    gap: var(--space-2);
}

.btn:focus {
    outline: none;
    box-shadow: var(--shadow-focus);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
    border-radius: var(--radius-lg);
}

/* Button Variants */
.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-charcoal);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background-color: var(--color-charcoal-dark);
    border-color: var(--color-charcoal-dark);
    transform: translateY(-1px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-charcoal);
    border-color: var(--color-border);
}

.btn-outline:hover {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-border-dark);
}

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

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

.btn-outline-charcoal {
    background-color: transparent;
    color: var(--color-charcoal);
    border-color: var(--color-charcoal);
}

.btn-outline-charcoal:hover {
    background-color: var(--color-charcoal);
    color: var(--color-white);
}

.btn-link {
    background-color: transparent;
    color: var(--color-primary);
    border-color: transparent;
    text-decoration: underline;
    padding: var(--space-1) var(--space-2);
}

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

/* Button with Icon */
.btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    padding: var(--space-2);
    border-radius: var(--radius-full);
}

/* ============================================
   FORMS & INPUTS
   ============================================ */
.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.form-control {
    display: block;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-family-primary);
    font-size: var(--text-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

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

.form-control::placeholder {
    color: var(--color-text-tertiary);
}

.form-control:disabled {
    background-color: var(--color-bg-tertiary);
    cursor: not-allowed;
}

/* Form Validation States */
.form-control.is-valid {
    border-color: var(--color-success);
}

.form-control.is-invalid {
    border-color: var(--color-error);
}

.form-text {
    display: block;
    margin-top: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.form-text.error {
    color: var(--color-error);
}

/* Checkboxes & Radios */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.form-check-label {
    font-size: var(--text-base);
    cursor: pointer;
}

/* ============================================
   CARDS & CONTAINERS
   ============================================ */
.card {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding-bottom: var(--space-4);
    margin-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
}

.card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-2);
}

.card-body {
    padding: var(--space-4) 0;
}

.card-footer {
    padding-top: var(--space-4);
    margin-top: var(--space-4);
    border-top: 1px solid var(--color-border-light);
}

/* Card Variants */
.card-primary {
    border-top: 4px solid var(--color-primary);
}

.card-charcoal {
    border-top: 4px solid var(--color-charcoal);
}

/* ============================================
   NAVIGATION & HEADER
   ============================================ */
.navbar {
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4) 0;
}

.navbar-brand {
    font-family: var(--font-family-secondary);
    font-size: var(--text-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-charcoal);
    text-decoration: none;
}

.navbar-brand:hover {
    color: var(--color-primary);
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-bg-secondary);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
/* Background Colors */
.bg-primary {
    background-color: var(--color-primary);
}

.bg-charcoal {
    background-color: var(--color-charcoal);
}

.bg-light {
    background-color: var(--color-bg-secondary);
}

/* Spacing Utilities */
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }

/* Flex Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-2 {
    gap: var(--space-2);
}

.gap-4 {
    gap: var(--space-4);
}

/* Display Utilities */
.d-none {
    display: none;
}

.d-block {
    display: block;
}

.d-inline-block {
    display: inline-block;
}

.d-flex {
    display: flex;
}

/* Width & Height */
.w-100 {
    width: 100%;
}

.h-100 {
    height: 100%;
}

/* Border Radius */
.rounded {
    border-radius: var(--radius-md);
}

.rounded-lg {
    border-radius: var(--radius-lg);
}

.rounded-full {
    border-radius: var(--radius-full);
}

/* Shadows */
.shadow-sm {
    box-shadow: var(--shadow-sm);
}

.shadow-md {
    box-shadow: var(--shadow-md);
}

.shadow-lg {
    box-shadow: var(--shadow-lg);
}

/* ============================================
   LAYOUT CONTAINERS
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.container-sm {
    max-width: 800px;
}

.container-lg {
    max-width: 1400px;
}

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(var(--space-4) * -1);
}

.col {
    flex: 1;
    padding: 0 var(--space-4);
}

/* ============================================
   CUSTOM LIVVENT COMPONENTS
   ============================================ */
/* Logo Styling */
.logo {
    font-family: var(--font-family-secondary);
    font-weight: var(--font-weight-bold);
    color: var(--color-charcoal);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.logo-icon {
    color: var(--color-primary);
    font-size: var(--text-2xl);
}

/* Status Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.badge-primary {
    background-color: var(--color-primary);
    color: var(--color-charcoal);
}

.badge-charcoal {
    background-color: var(--color-charcoal);
    color: var(--color-white);
}

.badge-success {
    background-color: var(--color-success);
    color: var(--color-white);
}

.badge-warning {
    background-color: var(--color-warning);
    color: var(--color-white);
}

.badge-error {
    background-color: var(--color-error);
    color: var(--color-white);
}

/* Alert Messages */
.alert {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border-left: 4px solid transparent;
}

.alert-info {
    background-color: rgba(52, 152, 219, 0.1);
    border-left-color: var(--color-info);
    color: var(--color-info);
}

.alert-success {
    background-color: rgba(39, 174, 96, 0.1);
    border-left-color: var(--color-success);
    color: var(--color-success);
}

.alert-warning {
    background-color: rgba(243, 156, 18, 0.1);
    border-left-color: var(--color-warning);
    color: var(--color-warning);
}

.alert-error {
    background-color: rgba(231, 76, 60, 0.1);
    border-left-color: var(--color-error);
    color: var(--color-error);
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */
@media (max-width: 640px) {
    :root {
        --text-4xl: 1.875rem;
        --text-3xl: 1.5rem;
        --text-2xl: 1.25rem;
        --text-xl: 1.125rem;
    }
    
    .container {
        padding: 0 var(--space-3);
    }
    
    .card {
        padding: var(--space-4);
        border-radius: var(--radius-lg);
    }
    
    .btn-lg {
        padding: var(--space-3) var(--space-6);
    }
}

@media (min-width: 641px) and (max-width: 1024px) {
    .container {
        padding: 0 var(--space-6);
    }
}

@media (min-width: 1025px) {
    .container {
        padding: 0 var(--space-8);
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        color: var(--color-black);
        background: none;
    }
    
    .card {
        border: 1px solid var(--color-black);
        box-shadow: none;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}