/* ======================================
   PROFESSIONAL LOADER STYLES v2.2
   Last Updated: 2026-03-27 (Text removed)
   ======================================

   Components included:
   1. Page Loader - Full-screen loading animation with glassmorphism
   2. Page Transition Loader - Inter-tab/page loading overlay
   3. Professional Spinner - Large inline spinner (.professional-spinner)
   4. Small Spinner - For buttons and inline use (.professional-spinner-sm)
   5. Content Loading - For loading states in content areas (.content-loading)
   6. Pulse Loader - Alternative dot-based loader (.pulse-loader)
   7. Linear Progress - Horizontal progress bar (.linear-progress)
   8. Skeleton Loader - Content placeholder animation (.skeleton-loader)

   Usage Examples:
   - Page load: Use #pageLoader div (auto-handled)
   - Page transition: Use #pageTransitionLoader (called by navigateToPage)
   - Content area: <div class="content-loading"><div class="professional-spinner"></div></div>
   - Button: <span class="professional-spinner-sm"></span>
   - Progress: <div class="linear-progress"><div class="linear-progress-bar"></div></div>
*/

/* Page Loader Styles */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent; /* Transparent to show birds animation */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.5s ease-out;
    overflow: hidden;
}

/* Vanta.js will attach to page-loader */

.page-loader.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loader-content {
    text-align: center;
    animation: fadeInUp 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    z-index: 1;
    /* Add subtle backdrop for better visibility on birds animation */
    background: rgba(0, 0, 0, 0.3);
    padding: 40px;
    border-radius: 20px;
    backdrop-filter: none;
}

/* Loader Icon */
.loader-icon {
    position: relative;
    width: 140px;
    height: 140px;
    margin: 0 auto 35px;
}

.loader-circle {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 5px solid transparent;
    animation: spin 1.5s cubic-bezier(0.68, -0.55, 0.27, 1.55) infinite;
}

.loader-circle:nth-child(1) {
    border-top-color: var(--accent-color);
    border-right-color: var(--accent-color);
    opacity: 1;
    filter: drop-shadow(0 0 8px var(--accent-color));
}

.loader-circle:nth-child(2) {
    border-top-color: rgba(100, 200, 255, 0.7);
    border-left-color: rgba(100, 200, 255, 0.7);
    animation-delay: -0.5s;
    animation-duration: 2s;
    filter: drop-shadow(0 0 6px rgba(100, 200, 255, 0.7));
}

.loader-circle:nth-child(3) {
    border-bottom-color: rgba(150, 150, 255, 0.4);
    border-right-color: rgba(150, 150, 255, 0.4);
    animation-delay: -1s;
    animation-duration: 2.5s;
    filter: drop-shadow(0 0 4px rgba(150, 150, 255, 0.4));
}

/* Center Icon */
.loader-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(255, 255, 255, 0.1) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3),
                0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    animation: pulseGlow 2s ease-in-out infinite;
    border: 2px solid rgba(255, 255, 255, 0.15);
}

.loader-center i {
    font-size: 28px;
    color: var(--accent-color);
    animation: floatRotate 4s ease-in-out infinite;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

/* Loader Text */
.loader-text {
    color: var(--text-primary);
    margin-top: 25px;
}

.loader-text h3 {
    font-size: 26px;
    font-weight: 700;
    margin: 0 0 12px;
    background: linear-gradient(135deg, var(--text-primary) 0%, rgba(255, 255, 255, 0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    animation: fadeIn 0.8s ease-out, shimmer 3s ease-in-out infinite;
    letter-spacing: 0.5px;
}

.loader-text p {
    font-size: 15px;
    margin: 0;
    color: var(--text-secondary);
    animation: fadeIn 1s ease-out;
    font-weight: 500;
    opacity: 0.9;
}

/* Loading Dots Animation */
.loading-dots {
    display: inline-block;
}

.loading-dots::after {
    content: '';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% {
        content: '';
    }
    40% {
        content: '.';
    }
    60% {
        content: '..';
    }
    80%, 100% {
        content: '...';
    }
}

/* Progress Bar */
.loader-progress {
    width: 240px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    margin: 30px auto 0;
    overflow: hidden;
    position: relative;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1) inset;
}

.loader-progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: linear-gradient(90deg,
        var(--accent-color) 0%,
        rgba(100, 200, 255, 0.8) 50%,
        var(--accent-color) 100%);
    border-radius: 10px;
    animation: progressSlide 2.5s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    box-shadow: 0 0 20px var(--accent-color),
                0 0 40px rgba(100, 200, 255, 0.5);
    background-size: 200% 100%;
    animation: progressSlide 2.5s cubic-bezier(0.4, 0, 0.2, 1) infinite,
               shimmerBar 2s ease-in-out infinite;
}

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

@keyframes pulseGlow {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3),
                    0 0 0 1px rgba(255, 255, 255, 0.1) inset,
                    0 0 20px rgba(var(--accent-color), 0.3);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.08);
        box-shadow: 0 15px 50px rgba(0, 0, 0, 0.4),
                    0 0 0 1px rgba(255, 255, 255, 0.15) inset,
                    0 0 30px rgba(var(--accent-color), 0.5);
    }
}

@keyframes floatRotate {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-3px) rotate(-5deg);
    }
    50% {
        transform: translateY(0) rotate(0deg);
    }
    75% {
        transform: translateY(3px) rotate(5deg);
    }
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes progressSlide {
    0% {
        width: 0%;
        left: 0;
    }
    50% {
        width: 75%;
        left: 0;
    }
    100% {
        width: 0%;
        left: 100%;
    }
}

@keyframes shimmer {
    0%, 100% {
        background-position: 0% center;
    }
    50% {
        background-position: 100% center;
    }
}

@keyframes shimmerBar {
    0%, 100% {
        background-position: 0% center;
    }
    50% {
        background-position: 200% center;
    }
}

/* Theme support is now automatically handled by CSS variables */

/* ======================================
   PAGE TRANSITION LOADER - Inter-tab navigation
   ====================================== */

.page-transition-loader {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
}

.page-transition-loader.active {
    display: flex;
    animation: fadeInTransition 0.15s ease-out forwards;
}

.page-transition-loader.fade-out {
    animation: fadeOutTransition 0.15s ease-out forwards;
}

.page-transition-content {
    text-align: center;
}

.page-transition-content .professional-spinner {
    margin: 0 auto;
    width: 40px;
    height: 40px;
    display: inline-block;
}

.page-transition-content .professional-spinner::before,
.page-transition-content .professional-spinner::after {
    border-width: 4px;
}

.page-transition-content .professional-spinner::after {
    inset: 5px;
}

.page-transition-text {
    display: none; /* Hide text for cleaner look */
}

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

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

/* ======================================
   INLINE LOADERS - For use within content areas
   ====================================== */

/* Professional Spinner - Large (replaces Bootstrap spinner-border) */
.professional-spinner {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    position: relative;
    display: inline-block;
    animation: rotate 1s linear infinite;
}

.professional-spinner::before,
.professional-spinner::after {
    content: "";
    box-sizing: border-box;
    position: absolute;
    inset: 0px;
    border-radius: 50%;
    border: 5px solid rgba(255, 255, 255, 0.2);
    animation: prixClipFix 2s linear infinite;
}

.professional-spinner::after {
    border-color: var(--accent-color);
    animation: prixClipFix 2s linear infinite, rotate 0.5s linear infinite reverse;
    inset: 6px;
}

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

@keyframes prixClipFix {
    0% {
        clip-path: polygon(50% 50%, 0 0, 0 0, 0 0, 0 0, 0 0);
    }
    25% {
        clip-path: polygon(50% 50%, 0 0, 100% 0, 100% 0, 100% 0, 100% 0);
    }
    50% {
        clip-path: polygon(50% 50%, 0 0, 100% 0, 100% 100%, 100% 100%, 100% 100%);
    }
    75% {
        clip-path: polygon(50% 50%, 0 0, 100% 0, 100% 100%, 0 100%, 0 100%);
    }
    100% {
        clip-path: polygon(50% 50%, 0 0, 100% 0, 100% 100%, 0 100%, 0 0);
    }
}

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

/* Dual-ring spinner variant (for areas needing more visual emphasis) */
.professional-spinner-dual {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    position: relative;
    display: inline-block;
    animation: rotate 1s linear infinite;
}

.professional-spinner-dual::before,
.professional-spinner-dual::after {
    content: "";
    box-sizing: border-box;
    position: absolute;
    inset: 0px;
    border-radius: 50%;
    border: 5px solid rgba(255, 255, 255, 0.2);
    animation: prixClipFix 2s linear infinite;
}

.professional-spinner-dual::after {
    border-color: var(--accent-color);
    animation: prixClipFix 2s linear infinite, rotate 0.5s linear infinite reverse;
    inset: 6px;
}

/* Small Spinner - For buttons and inline use */
.professional-spinner-sm {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    position: relative;
    animation: rotate 1s linear infinite;
    display: inline-block;
    vertical-align: middle;
}

.professional-spinner-sm::before,
.professional-spinner-sm::after {
    content: "";
    box-sizing: border-box;
    position: absolute;
    inset: 0px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.2);
    animation: prixClipFix 2s linear infinite;
}

.professional-spinner-sm::after {
    border-color: var(--accent-color);
    animation: prixClipFix 2s linear infinite, rotate 0.5s linear infinite reverse;
    inset: 2px;
}

/* Content Loading Container */
.content-loading {
    text-align: center;
    padding: 4rem 2rem;
    position: relative;
    animation: fadeIn 0.3s ease-out;
}

.content-loading .professional-spinner {
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
    display: inline-block;
}

.content-loading-text {
    display: none; /* Hide text for cleaner loader */
}

/* Pulse Dot Loader - Alternative Style */
.pulse-loader {
    display: inline-flex;
    gap: 10px;
    align-items: center;
}

.pulse-loader span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-color);
    animation: pulseDot 1.4s ease-in-out infinite;
    box-shadow: 0 0 12px var(--accent-color);
}

.pulse-loader span:nth-child(2) {
    animation-delay: 0.2s;
}

.pulse-loader span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes pulseDot {
    0%, 60%, 100% {
        transform: scale(0.7);
        opacity: 0.5;
    }
    30% {
        transform: scale(1.1);
        opacity: 1;
    }
}

/* Linear Progress Bar - For loading states */
.linear-progress {
    width: 100%;
    height: 3px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.linear-progress-bar {
    height: 100%;
    background: linear-gradient(90deg,
        var(--accent-color) 0%,
        rgba(100, 200, 255, 0.8) 50%,
        var(--accent-color) 100%);
    border-radius: 10px;
    animation: progressSlide 2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    box-shadow: 0 0 15px var(--accent-color);
    background-size: 200% 100%;
}

/* Skeleton Loader - For content placeholders */
.skeleton-loader {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.05) 25%,
        rgba(255, 255, 255, 0.1) 50%,
        rgba(255, 255, 255, 0.05) 75%
    );
    background-size: 200% 100%;
    animation: skeleton 1.5s ease-in-out infinite;
    border-radius: 8px;
}

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

.skeleton-text {
    height: 16px;
    margin-bottom: 10px;
}

.skeleton-text:last-child {
    width: 60%;
}

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

/* Mobile Responsive */
@media (max-width: 768px) {
    .loader-content {
        padding: 30px 25px;
        border-radius: 25px;
    }

    .loader-icon {
        width: 110px;
        height: 110px;
        margin-bottom: 30px;
    }

    .loader-circle {
        border-width: 4px;
    }

    .loader-center {
        width: 50px;
        height: 50px;
    }

    .loader-center i {
        font-size: 24px;
    }

    .loader-text h3 {
        font-size: 22px;
        margin-bottom: 10px;
    }

    .loader-text p {
        font-size: 14px;
    }

    .loader-progress {
        width: 180px;
        margin-top: 25px;
    }

    /* Inline loaders */
    .professional-spinner,
    .professional-spinner-dual {
        width: 42px;
        height: 42px;
    }

    .professional-spinner::before,
    .professional-spinner::after,
    .professional-spinner-dual::before,
    .professional-spinner-dual::after {
        border-width: 4px;
    }

    .professional-spinner::after,
    .professional-spinner-dual::after {
        inset: 5px;
    }

    .content-loading {
        padding: 3rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .loader-content {
        padding: 25px 20px;
        border-radius: 20px;
    }

    .loader-icon {
        width: 90px;
        height: 90px;
        margin-bottom: 25px;
    }

    .loader-circle {
        border-width: 3px;
    }

    .loader-center {
        width: 42px;
        height: 42px;
    }

    .loader-center i {
        font-size: 20px;
    }

    .loader-text h3 {
        font-size: 20px;
        margin-bottom: 8px;
    }

    .loader-text p {
        font-size: 13px;
    }

    .loader-progress {
        width: 160px;
        height: 3px;
        margin-top: 20px;
    }

    /* Inline loaders */
    .professional-spinner,
    .professional-spinner-dual {
        width: 36px;
        height: 36px;
    }

    .professional-spinner::before,
    .professional-spinner::after,
    .professional-spinner-dual::before,
    .professional-spinner-dual::after {
        border-width: 3px;
    }

    .professional-spinner::after,
    .professional-spinner-dual::after {
        inset: 4px;
    }

    .professional-spinner-sm {
        width: 14px;
        height: 14px;
    }

    .professional-spinner-sm::before,
    .professional-spinner-sm::after {
        border-width: 2px;
    }

    .professional-spinner-sm::after {
        inset: 2px;
    }

    .content-loading {
        padding: 2.5rem 1rem;
    }

    .pulse-loader span {
        width: 10px;
        height: 10px;
    }
}