/*
===============================================================================
VISION79 DESIGN SYSTEM
===============================================================================

This file contains the complete design system for Vision79, including:
- Brand guidelines and color palette
- Typography system
- Component library
- Animation system
- Responsive design utilities
- Accessibility features

===============================================================================
*/

/* ===============================================================================
   BRAND GUIDELINES & DESIGN TOKENS
   =============================================================================== */

:root {
    /* ===== BRAND COLORS ===== */
    --color-primary: #1a365d;          /* Deep professional blue */
    --color-secondary: #3182ce;         /* Vibrant blue for CTAs */
    --color-accent: #f97316;            /* Energetic orange */
    --color-success: #059669;           /* Success green */
    
    /* ===== NEUTRAL COLORS ===== */
    --color-dark: #1f2937;              /* Text and headings */
    --color-gray: #6b7280;              /* Secondary text */
    --color-light: #f3f4f6;             /* Backgrounds */
    --color-white: #ffffff;              /* Primary backgrounds */
    
    /* ===== SEMANTIC COLORS ===== */
    --color-error: #dc2626;             /* Error states */
    --color-warning: #d97706;           /* Warning states */
    --color-info: #2563eb;              /* Information */
    
    /* ===== TYPOGRAPHY ===== */
    --font-family: 'Inter', sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* ===== SPACING SCALE ===== */
    --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 */
    --spacing-3xl: 4rem;                /* 64px */
    
    /* ===== BORDER RADIUS ===== */
    --radius-sm: 0.25rem;               /* 4px */
    --radius-md: 0.5rem;                /* 8px */
    --radius-lg: 1rem;                  /* 16px */
    --radius-xl: 1.5rem;                /* 24px */
    
    /* ===== 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-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* ===== ANIMATIONS ===== */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* ===== GRADIENTS ===== */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, #fb923c 100%);
    --gradient-hero: linear-gradient(135deg, var(--color-primary) 0%, #1e40af 50%, var(--color-secondary) 100%);
    --gradient-success: linear-gradient(135deg, var(--color-success) 0%, #10b981 100%);
}

/* ===============================================================================
   BASE STYLES & RESET
   =============================================================================== */

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

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

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
    overflow-x: hidden;
}

/* ===============================================================================
   TYPOGRAPHY SYSTEM
   =============================================================================== */

.heading-1 {
    font-size: 3.5rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--color-primary);
}

.heading-2 {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.3;
    color: var(--color-primary);
}

.heading-3 {
    font-size: 2rem;
    font-weight: var(--font-weight-semibold);
    line-height: 1.4;
    color: var(--color-primary);
}

.heading-4 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    line-height: 1.4;
    color: var(--color-primary);
}

.body-large {
    font-size: 1.25rem;
    font-weight: var(--font-weight-normal);
    line-height: 1.7;
    color: var(--color-gray);
}

.body-medium {
    font-size: 1.1rem;
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-gray);
}

.body-small {
    font-size: 1rem;
    font-weight: var(--font-weight-normal);
    line-height: 1.5;
    color: var(--color-gray);
}

/* ===============================================================================
   BUTTON SYSTEM
   =============================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-bounce);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    font-family: var(--font-family);
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

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

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-ghost {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid transparent;
}

.btn-ghost:hover {
    background: rgba(26, 54, 93, 0.1);
    border-color: var(--color-primary);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

.btn-xl {
    padding: var(--spacing-xl) var(--spacing-3xl);
    font-size: 1.25rem;
}

/* ===============================================================================
   CARD SYSTEM
   =============================================================================== */

.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
    transition: all var(--transition-bounce);
    border: 1px solid rgba(31, 41, 55, 0.1);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-interactive {
    cursor: pointer;
}

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

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

/* ===============================================================================
   FORM SYSTEM
   =============================================================================== */

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: var(--font-weight-medium);
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-light);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-family);
    transition: all var(--transition-fast);
    background: var(--color-white);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
}

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

.form-input.success {
    border-color: var(--color-success);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* ===============================================================================
   ANIMATION SYSTEM
   =============================================================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(100px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: calc(200px + 100%) 0;
    }
}

/* Animation Classes */
.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.animate-fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.6s ease-out;
}

.animate-slide-in-up {
    animation: slideInUp 0.6s ease-out;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* ===============================================================================
   UTILITY CLASSES
   =============================================================================== */

/* Spacing Utilities */
.mt-xs { margin-top: var(--spacing-xs); }
.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); }
.mt-2xl { margin-top: var(--spacing-2xl); }
.mt-3xl { margin-top: var(--spacing-3xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.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); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }
.mb-3xl { margin-bottom: var(--spacing-3xl); }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }
.p-2xl { padding: var(--spacing-2xl); }
.p-3xl { padding: var(--spacing-3xl); }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-accent { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-gray { color: var(--color-gray); }
.text-white { color: var(--color-white); }

/* Display Utilities */
.d-flex { display: flex; }
.d-grid { display: grid; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }

.align-center { align-items: center; }
.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }

/* ===============================================================================
   RESPONSIVE DESIGN
   =============================================================================== */

/* Mobile First Approach */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Responsive Breakpoints */
@media (max-width: 768px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .heading-1 {
        font-size: 2.5rem;
    }
    
    .heading-2 {
        font-size: 2rem;
    }
    
    .heading-3 {
        font-size: 1.75rem;
    }
    
    .btn-xl {
        padding: var(--spacing-lg) var(--spacing-xl);
        font-size: 1.125rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .heading-1 {
        font-size: 2rem;
    }
    
    .heading-2 {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 0.875rem;
    }
}

/* ===============================================================================
   ACCESSIBILITY
   =============================================================================== */

/* Focus Styles */
*:focus {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

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

/* Screen Reader Only */
.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;
}

/* ===============================================================================
   LOADING STATES
   =============================================================================== */

.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 1.5s infinite;
}

/* ===============================================================================
   CUSTOM SCROLLBAR
   =============================================================================== */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-light);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* ===============================================================================
   PRINT STYLES
   =============================================================================== */

@media print {
    * {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    .btn,
    .card::before {
        display: none !important;
    }
}