/*
=========================================
  BUILDERSOFT LOADING ANIMATION SYSTEM
  Modern, lightweight loading animations
=========================================
*/

/* ==========================================
   CSS Custom Properties (Design Tokens)
   ========================================== */
:root {
    --bs-loader-primary: #289496;
    --bs-loader-primary-rgb: 40, 148, 150;
    --bs-loader-secondary: #1a6365;
    --bs-loader-light: rgba(255, 255, 255, 0.1);
    --bs-loader-dark: rgba(0, 0, 0, 0.05);
    --bs-transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --bs-transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --bs-skeleton-base: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.05) 0%, 
        rgba(255, 255, 255, 0.1) 50%, 
        rgba(255, 255, 255, 0.05) 100%);
    --bs-skeleton-base-light: linear-gradient(90deg, 
        rgba(0, 0, 0, 0.04) 0%, 
        rgba(0, 0, 0, 0.08) 50%, 
        rgba(0, 0, 0, 0.04) 100%);
}

/* ==========================================
   PAGE LOADER - Full screen initial load
   ========================================== */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #1a1a2e;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s var(--bs-transition-smooth), 
                visibility 0.5s var(--bs-transition-smooth);
}

.page-loader.loaded {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.page-loader__content {
    text-align: center;
}

/* Animated Logo/Brand Loader */
.page-loader__logo {
    width: 120px;
    height: auto;
    animation: pulse-glow 2s ease-in-out infinite;
    margin-bottom: 1.5rem;
}

@keyframes pulse-glow {
    0%, 100% {
        filter: drop-shadow(0 0 5px rgba(var(--bs-loader-primary-rgb), 0.3));
        transform: scale(1);
    }
    50% {
        filter: drop-shadow(0 0 20px rgba(var(--bs-loader-primary-rgb), 0.6));
        transform: scale(1.02);
    }
}

/* Modern Spinner */
.spinner {
    width: 48px;
    height: 48px;
    position: relative;
    margin: 0 auto;
}

.spinner::before,
.spinner::after {
    content: '';
    position: absolute;
    border-radius: 50%;
}

.spinner::before {
    width: 100%;
    height: 100%;
    border: 3px solid var(--bs-loader-light);
    border-top-color: var(--bs-loader-primary);
    animation: spinner-rotate 1s linear infinite;
}

.spinner::after {
    width: 60%;
    height: 60%;
    top: 20%;
    left: 20%;
    border: 3px solid transparent;
    border-bottom-color: var(--bs-loader-secondary);
    animation: spinner-rotate 0.8s linear infinite reverse;
}

@keyframes spinner-rotate {
    to { transform: rotate(360deg); }
}

/* Dot Pulse Loader */
.dot-pulse {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 1rem auto;
}

.dot-pulse__dot {
    width: 10px;
    height: 10px;
    background: var(--bs-loader-primary);
    border-radius: 50%;
    animation: dot-bounce 1.4s ease-in-out infinite both;
}

.dot-pulse__dot:nth-child(1) { animation-delay: -0.32s; }
.dot-pulse__dot:nth-child(2) { animation-delay: -0.16s; }
.dot-pulse__dot:nth-child(3) { animation-delay: 0s; }

@keyframes dot-bounce {
    0%, 80%, 100% {
        transform: scale(0.6);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Progress Bar Loader */
.progress-loader {
    width: 200px;
    height: 3px;
    background: var(--bs-loader-light);
    border-radius: 3px;
    overflow: hidden;
    margin: 1rem auto;
}

.progress-loader__bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--bs-loader-primary), var(--bs-loader-secondary));
    border-radius: 3px;
    animation: progress-indeterminate 1.5s ease-in-out infinite;
}

@keyframes progress-indeterminate {
    0% {
        width: 0%;
        margin-left: 0%;
    }
    50% {
        width: 50%;
        margin-left: 25%;
    }
    100% {
        width: 0%;
        margin-left: 100%;
    }
}

/* ==========================================
   SKELETON LOADERS - Content placeholders
   ========================================== */
.skeleton {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

.skeleton::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bs-skeleton-base);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Skeleton variants for light backgrounds */
.skeleton--light {
    background: rgba(0, 0, 0, 0.06);
}

.skeleton--light::after {
    background: var(--bs-skeleton-base-light);
    background-size: 200% 100%;
}

/* Skeleton sizes */
.skeleton--text {
    height: 16px;
    width: 100%;
    margin-bottom: 8px;
}

.skeleton--text-sm {
    height: 12px;
    width: 80%;
    margin-bottom: 6px;
}

.skeleton--text-lg {
    height: 24px;
    width: 60%;
    margin-bottom: 12px;
}

.skeleton--title {
    height: 32px;
    width: 70%;
    margin-bottom: 16px;
}

.skeleton--avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.skeleton--avatar-lg {
    width: 80px;
    height: 80px;
    border-radius: 50%;
}

.skeleton--button {
    height: 40px;
    width: 120px;
    border-radius: 4px;
}

.skeleton--card {
    height: 200px;
    width: 100%;
    border-radius: 8px;
}

.skeleton--image {
    height: 180px;
    width: 100%;
    border-radius: 8px;
}

/* Card skeleton composition */
.skeleton-card {
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    border: 1px dashed rgba(255, 255, 255, 0.1);
}

.skeleton-card--light {
    background: rgba(0, 0, 0, 0.02);
    border-color: rgba(0, 0, 0, 0.08);
}

/* ==========================================
   SCROLL REVEAL ANIMATIONS
   ========================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s var(--bs-transition-smooth),
                transform 0.6s var(--bs-transition-smooth);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Reveal variants */
.reveal--fade {
    transform: none;
}

.reveal--slide-left {
    transform: translateX(-40px);
}

.reveal--slide-left.revealed {
    transform: translateX(0);
}

.reveal--slide-right {
    transform: translateX(40px);
}

.reveal--slide-right.revealed {
    transform: translateX(0);
}

.reveal--scale {
    transform: scale(0.9);
}

.reveal--scale.revealed {
    transform: scale(1);
}

.reveal--rotate {
    transform: perspective(1000px) rotateX(10deg) translateY(20px);
}

.reveal--rotate.revealed {
    transform: perspective(1000px) rotateX(0) translateY(0);
}

/* Staggered delays for grouped elements */
.reveal-group .reveal:nth-child(1) { transition-delay: 0s; }
.reveal-group .reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal-group .reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal-group .reveal:nth-child(4) { transition-delay: 0.3s; }
.reveal-group .reveal:nth-child(5) { transition-delay: 0.4s; }
.reveal-group .reveal:nth-child(6) { transition-delay: 0.5s; }
.reveal-group .reveal:nth-child(7) { transition-delay: 0.6s; }
.reveal-group .reveal:nth-child(8) { transition-delay: 0.7s; }

/* ==========================================
   LAZY IMAGE LOADING
   ========================================== */
.lazy-image {
    opacity: 0;
    transition: opacity 0.5s var(--bs-transition-smooth);
}

.lazy-image.loaded {
    opacity: 1;
}

.lazy-image-wrapper {
    position: relative;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.03);
}

.lazy-image-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bs-skeleton-base);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    z-index: 1;
    transition: opacity 0.3s ease;
}

.lazy-image-wrapper.loaded::before {
    opacity: 0;
    pointer-events: none;
}

/* ==========================================
   COMPONENT LOADING STATES
   ========================================== */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 46, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Button loading state */
.btn-loading {
    position: relative;
    pointer-events: none;
}

.btn-loading .btn-text {
    opacity: 0;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin: -10px 0 0 -10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spinner-rotate 0.8s linear infinite;
}

/* Card loading shimmer effect */
.card-loading {
    position: relative;
    overflow: hidden;
}

.card-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.08),
        transparent
    );
    animation: card-shimmer 2s infinite;
}

@keyframes card-shimmer {
    100% { left: 100%; }
}

/* ==========================================
   CONTENT TRANSITIONS
   ========================================== */
.content-fade {
    animation: content-fade-in 0.5s var(--bs-transition-smooth) forwards;
}

@keyframes content-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section transitions */
section {
    transition: opacity 0.3s ease;
}

/* Smooth image appearance */
img {
    transition: opacity 0.3s ease;
}

/* ==========================================
   HOVER MICRO-INTERACTIONS
   ========================================== */
.card-hover {
    transition: transform 0.3s var(--bs-transition-smooth),
                box-shadow 0.3s var(--bs-transition-smooth);
}

.card-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Link underline animation */
.link-animate {
    position: relative;
    text-decoration: none;
}

.link-animate::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--bs-loader-primary);
    transition: width 0.3s var(--bs-transition-smooth);
}

.link-animate:hover::after {
    width: 100%;
}

/* Icon pulse on hover */
.icon-pulse:hover {
    animation: icon-pulse 0.6s ease;
}

@keyframes icon-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

/* ==========================================
   LOADING STATES FOR SECTIONS
   ========================================== */
.section-loading {
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ==========================================
   REDUCED MOTION SUPPORT
   ========================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .reveal {
        opacity: 1;
        transform: none;
    }
    
    .lazy-image {
        opacity: 1;
    }
}

/* ==========================================
   RESPONSIVE ADJUSTMENTS
   ========================================== */
@media (max-width: 768px) {
    .page-loader__logo {
        width: 80px;
    }
    
    .spinner {
        width: 40px;
        height: 40px;
    }
    
    .reveal {
        transform: translateY(20px);
    }
}