/* 
 * Main CSS File
 * Atelier Flint & Associates Architects Website
 * 
 * This file contains global styles, base typography, and utility classes
 * following BEM methodology and mobile-first responsive design.
 */

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

/* Box-sizing reset */
*,
*::before,
*::after {
    box-sizing: border-box;
}

/* Remove default margins and paddings */
* {
    margin: 0;
    padding: 0;
}

/* HTML & Body base styles */
html {
    font-size: 100%; /* 16px base */
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Headings */
h1, h2, h3, h4, h5, h6,
.heading-1, .heading-2, .heading-3, .heading-4, .heading-5, .heading-6 {
    font-family: var(--font-family-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

h1, .heading-1 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-lg);
}

h2, .heading-2 {
    font-size: var(--font-size-3xl);
}

h3, .heading-3 {
    font-size: var(--font-size-2xl);
}

h4, .heading-4 {
    font-size: var(--font-size-xl);
}

h5, .heading-5 {
    font-size: var(--font-size-lg);
}

h6, .heading-6 {
    font-size: var(--font-size-base);
}

/* Responsive typography */
@media (min-width: 768px) {
    h1, .heading-1 {
        font-size: var(--font-size-5xl);
    }
    
    h2, .heading-2 {
        font-size: var(--font-size-4xl);
    }
}

@media (min-width: 1200px) {
    h1, .heading-1 {
        font-size: var(--font-size-6xl);
    }
}

/* Paragraphs and text */
p {
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-relaxed);
}

/* Links */
a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

a:focus {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

/* Lists */
ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

li {
    margin-bottom: var(--spacing-xs);
}

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

/* Screen reader only content */
.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;
}

.sr-only:focus {
    position: static;
    width: auto;
    height: auto;
    padding: var(--spacing-sm);
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* Focus styles */
.focus\:not-sr-only:focus {
    position: static !important;
    width: auto !important;
    height: auto !important;
    padding: var(--spacing-sm) !important;
    margin: 0 !important;
    overflow: visible !important;
    clip: auto !important;
    white-space: normal !important;
}

/* ==========================================================================
   LAYOUT UTILITIES
   ========================================================================== */

/* Container */
.container {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

@media (min-width: 576px) {
    .container {
        max-width: var(--container-sm);
    }
}

@media (min-width: 768px) {
    .container {
        max-width: var(--container-md);
    }
}

@media (min-width: 992px) {
    .container {
        max-width: var(--container-lg);
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: var(--container-xl);
    }
}

@media (min-width: 1400px) {
    .container {
        max-width: var(--container-xxl);
    }
}

/* Section spacing */
.section {
    padding: var(--spacing-5xl) 0;
}

@media (max-width: 767px) {
    .section {
        padding: var(--spacing-4xl) 0;
    }
}

/* ==========================================================================
   SCROLL PROGRESS INDICATOR
   ========================================================================== */

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-secondary) 0%, var(--color-accent-orange) 100%);
    z-index: var(--z-index-tooltip);
    transform-origin: left;
    transform: scaleX(0);
    transition: transform var(--transition-fast);
}

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

/* Loading spinner */
.spinner {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    border: 2px solid var(--color-border);
    border-top: 2px solid var(--color-primary);
    border-radius: var(--border-radius-full);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-background);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-index-modal);
}

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

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

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

.text-primary { color: var(--color-primary) !important; }
.text-secondary { color: var(--color-secondary) !important; }
.text-muted { color: var(--color-text-muted) !important; }
.text-white { color: var(--color-text-light) !important; }

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

/* Spacing utilities */
.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--spacing-xs) !important; }
.mt-2 { margin-top: var(--spacing-sm) !important; }
.mt-3 { margin-top: var(--spacing-md) !important; }
.mt-4 { margin-top: var(--spacing-lg) !important; }
.mt-5 { margin-top: var(--spacing-xl) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--spacing-xs) !important; }
.mb-2 { margin-bottom: var(--spacing-sm) !important; }
.mb-3 { margin-bottom: var(--spacing-md) !important; }
.mb-4 { margin-bottom: var(--spacing-lg) !important; }
.mb-5 { margin-bottom: var(--spacing-xl) !important; }

.py-0 { padding-top: 0 !important; padding-bottom: 0 !important; }
.py-1 { padding-top: var(--spacing-xs) !important; padding-bottom: var(--spacing-xs) !important; }
.py-2 { padding-top: var(--spacing-sm) !important; padding-bottom: var(--spacing-sm) !important; }
.py-3 { padding-top: var(--spacing-md) !important; padding-bottom: var(--spacing-md) !important; }
.py-4 { padding-top: var(--spacing-lg) !important; padding-bottom: var(--spacing-lg) !important; }
.py-5 { padding-top: var(--spacing-xl) !important; padding-bottom: var(--spacing-xl) !important; }

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

/* Visibility utilities */
.visible { visibility: visible !important; }
.invisible { visibility: hidden !important; }

/* Opacity utilities */
.opacity-0 { opacity: 0 !important; }
.opacity-25 { opacity: 0.25 !important; }
.opacity-50 { opacity: 0.5 !important; }
.opacity-75 { opacity: 0.75 !important; }
.opacity-100 { opacity: 1 !important; }

/* ==========================================================================
   ANIMATION UTILITIES
   ========================================================================== */

/* Fade animations */
.fade-in {
    opacity: 0;
    animation: fadeIn var(--animation-duration-normal) ease-out forwards;
}

.fade-out {
    opacity: 1;
    animation: fadeOut var(--animation-duration-normal) ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

/* Slide animations */
.slide-in-up {
    transform: translateY(30px);
    opacity: 0;
    animation: slideInUp var(--animation-duration-normal) ease-out forwards;
}

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

/* Hover effects */
.hover-scale:hover {
    transform: scale(1.05);
    transition: transform var(--transition-normal);
}

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

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

@media print {
    *,
    *::before,
    *::after {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    a,
    a:visited {
        text-decoration: underline;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
    }
    
    abbr[title]::after {
        content: " (" attr(title) ")";
    }
    
    pre,
    blockquote {
        border: 1px solid #999;
        page-break-inside: avoid;
    }
    
    thead {
        display: table-header-group;
    }
    
    tr,
    img {
        page-break-inside: avoid;
    }
    
    img {
        max-width: 100% !important;
    }
    
    p,
    h2,
    h3 {
        orphans: 3;
        widows: 3;
    }
    
    h2,
    h3 {
        page-break-after: avoid;
    }
    
    /* Hide unnecessary elements in print */
    .no-print,
    #whatsapp-float,
    #scroll-to-top,
    #mobile-menu-toggle,
    .btn,
    button {
        display: none !important;
    }
}