/* 
 * Stefan Vrtiel Custom CSS Framework
 * Modern, Professional & Interactive Design
 */

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --dark-color: #1a1a1a;
    --light-color: #ecf0f1;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow-light: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-medium: 0 5px 20px rgba(0,0,0,0.15);
    --shadow-heavy: 0 10px 40px rgba(0,0,0,0.2);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    overflow-x: hidden;
}

body.menu-open {
    overflow: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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-bottom: 1rem;
    color: var(--text-secondary);
}

/* Container System */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.container-fluid {
    width: 100%;
    padding: 0 2rem;
}

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -1rem;
}

.col {
    flex: 1;
    padding: 0 1rem;
}

/* Base column classes */
.col-1 { flex: 0 0 8.333333%; max-width: 8.333333%; padding: 0 1rem; }
.col-2 { flex: 0 0 16.666667%; max-width: 16.666667%; padding: 0 1rem; }
.col-3 { flex: 0 0 25%; max-width: 25%; padding: 0 1rem; }
.col-4 { flex: 0 0 33.333333%; max-width: 33.333333%; padding: 0 1rem; }
.col-6 { flex: 0 0 50%; max-width: 50%; padding: 0 1rem; }
.col-8 { flex: 0 0 66.666667%; max-width: 66.666667%; padding: 0 1rem; }
.col-9 { flex: 0 0 75%; max-width: 75%; padding: 0 1rem; }
.col-12 { flex: 0 0 100%; max-width: 100%; padding: 0 1rem; }

/* Responsive Grid - Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .col-md-1 { flex: 0 0 8.333333%; max-width: 8.333333%; padding: 0 1rem; }
    .col-md-2 { flex: 0 0 16.666667%; max-width: 16.666667%; padding: 0 1rem; }
    .col-md-3 { flex: 0 0 25%; max-width: 25%; padding: 0 1rem; }
    .col-md-4 { flex: 0 0 33.333333%; max-width: 33.333333%; padding: 0 1rem; }
    .col-md-6 { flex: 0 0 50%; max-width: 50%; padding: 0 1rem; }
    .col-md-8 { flex: 0 0 66.666667%; max-width: 66.666667%; padding: 0 1rem; }
    .col-md-9 { flex: 0 0 75%; max-width: 75%; padding: 0 1rem; }
    .col-md-12 { flex: 0 0 100%; max-width: 100%; padding: 0 1rem; }
}

/* Responsive Grid - Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
    .col-lg-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
    .col-lg-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
    .col-lg-3 { flex: 0 0 25%; max-width: 25%; }
    .col-lg-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-lg-6 { flex: 0 0 50%; max-width: 50%; }
    .col-lg-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
    .col-lg-9 { flex: 0 0 75%; max-width: 75%; }
    .col-lg-12 { flex: 0 0 100%; max-width: 100%; }
}

/* Spacing utilities */
.g-3 > .col, .g-3 > [class*="col-"] { padding: 0.75rem !important; }
.g-4 > .col, .g-4 > [class*="col-"] { padding: 1rem !important; }
.g-5 > .col, .g-5 > [class*="col-"] { padding: 1.5rem !important; }

.row.g-3 { margin: -0.75rem; }
.row.g-4 { margin: -1rem; }
.row.g-5 { margin: -1.5rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.me-1 { margin-right: 0.25rem; }
.me-2 { margin-right: 0.5rem; }
.me-3 { margin-right: 1rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }

.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 1rem; padding-bottom: 1rem; }
.py-4 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-5 { padding-top: 3rem; padding-bottom: 3rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
    z-index: -1;
}

.btn:hover::before {
    left: 100%;
}

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

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

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

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

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

/* Cards */
.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    overflow: hidden;
    transition: var(--transition);
    margin-bottom: 2rem;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.card-header {
    padding: 1.5rem;
    background: var(--gradient-primary);
    color: white;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    background: var(--light-color);
    border-top: 1px solid #ddd;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: white;
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Animations */
@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 pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

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

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

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

.animate-spin {
    animation: spin 1s linear infinite;
}

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

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

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

.m-0 { margin: 0; }
.m-1 { margin: 0.5rem; }
.m-2 { margin: 1rem; }
.m-3 { margin: 1.5rem; }
.m-4 { margin: 2rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-inline-block { display: inline-block; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.position-relative { position: relative; }
.position-absolute { position: absolute; }
.position-fixed { position: fixed; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .row {
        margin: 0 -0.5rem;
    }
    
    .col {
        padding: 0 0.5rem;
    }
    
    .col-1, .col-2, .col-3, .col-4, .col-6, .col-8, .col-9 {
        flex: 0 0 100%;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

/* Loading Spinner */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

/* Glass Effect */
.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Gradient Text */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: #0000006b;
    background-clip: text;
}

/* Display utilities */
.d-flex { display: flex; }
.d-block { display: block; }
.d-inline-block { display: inline-block; }
.d-none { display: none; }

/* Flex utilities */
.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }
.align-items-center { align-items: center; }
.align-items-start { align-items: flex-start; }
.flex-grow-1 { flex-grow: 1; }

/* Text utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--secondary-color); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }

/* Font weights */
.fw-bold { font-weight: bold; }
.fw-medium { font-weight: 500; }
.fw-normal { font-weight: normal; }

/* Sizes */
.w-100 { width: 100%; }
.h-100 { height: 100%; }

/* Border utilities */
.border-0 { border: none; }
.rounded { border-radius: var(--border-radius); }

/* Background utilities */
.bg-light { background-color: var(--light-color); }
.bg-primary { background-color: var(--primary-color); }
.bg-secondary { background-color: var(--secondary-color); }

/* Shadow utilities */
.shadow-sm { box-shadow: var(--shadow-light); }
.shadow { box-shadow: var(--shadow-medium); }
.shadow-lg { box-shadow: var(--shadow-heavy); }

/* List utilities */
.list-unstyled {
    list-style: none;
    padding-left: 0;
}

/* Typography utilities */
.lead {
    font-size: 1.2rem;
    font-weight: 300;
    line-height: 1.6;
}

.display-4 {
    font-size: 3.5rem;
    font-weight: 300;
    line-height: 1.2;
}

.small {
    font-size: 0.875rem;
}

.text-uppercase {
    text-transform: uppercase;
}

/* Position utilities */
.position-relative { position: relative; }
.position-absolute { position: absolute; }

/* Z-index utilities */
.z-index-1 { z-index: 1; }
.z-index-10 { z-index: 10; }

/* Overflow utilities */
.overflow-hidden { overflow: hidden; }

/* Animation delays */
[style*="animation-delay"] {
    opacity: 0;
    animation-fill-mode: both;
}

/* Progress bars */
.progress {
    width: 100%;
    height: 8px;
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 10px;
    transition: width 1s ease-in-out;
}

.progress-bar.bg-primary { background-color: var(--primary-color); }
.progress-bar.bg-success { background-color: var(--success-color); }
.progress-bar.bg-warning { background-color: var(--warning-color); }

/* Form Controls */
.form-control {
    display: block;
    width: 100%;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    appearance: none;
    border-radius: 0.375rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    color: #212529;
    background-color: #fff;
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.form-control.border-0 {
    border: 0;
}

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

.form-label {
    margin-bottom: 0.5rem;
    font-weight: 500;
}

/* Additional utilities */
.border-0 {
    border: 0 !important;
}

.border-top {
    border-top: 1px solid #dee2e6 !important;
}

.rounded {
    border-radius: 0.375rem !important;
}

.list-unstyled {
    padding-left: 0;
    list-style: none;
}

.fs-3 {
    font-size: 1.75rem !important;
}

.py-3 {
    padding-top: 1rem !important;
    padding-bottom: 1rem !important;
}

.px-4 {
    padding-left: 1.5rem !important;
    padding-right: 1.5rem !important;
}

.text-decoration-none {
    text-decoration: none !important;
}

.text-decoration-none:hover {
    text-decoration: underline !important;
}

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

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

.lead {
    font-size: 1.25rem;
    font-weight: 300;
    line-height: 1.6;
}

.g-5 {
    gap: 3rem;
}

.mb-4 {
    margin-bottom: 1.5rem;
}

.mb-5 {
    margin-bottom: 3rem;
}

.pt-4 {
    padding-top: 1.5rem;
}

/* Additional utilities for footer */
.text-lg-start {
    text-align: left !important;
}

@media (max-width: 991.98px) {
    .text-lg-start {
        text-align: center !important;
    }
}

.text-lg-end {
    text-align: right !important;
}

@media (max-width: 991.98px) {
    .text-lg-end {
        text-align: center !important;
    }
}

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

.mb-0 {
    margin-bottom: 0 !important;
}

.text-muted {
    color: #6c757d !important;
}

/* Text color utilities */
.text-white {
    color: #ffffff !important;
}

.text-white-50 {
    color: rgba(255, 255, 255, 0.5) !important;
}

/* Height utilities */
.h-100 {
    height: 100% !important;
}

/* Width utilities */
.w-100 {
    width: 100% !important;
}