/**
 * Loading Screen Styles
 */

html {
    scrollbar-gutter: stable;
}

/* Prevent page jump by hiding body content initially - ONLY on home page */
body.home:not(.loaded) {
    overflow: hidden;
}

body.home:not(.loaded) .lms-main,
body.home:not(.loaded) .lms-header {
    opacity: 0;
    visibility: hidden;
}

/* Smooth fade-in for main content when loaded - ONLY on home page */
body.home.loaded .lms-main,
body.home.loaded .lms-header {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.18s ease 0.04s, visibility 0.18s ease 0.04s;
}

.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.18s ease, visibility 0.18s ease;
    will-change: opacity, visibility;
}

.loading-screen.fade-out {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

html.skip-loading-screen .loading-screen {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* When transitions skip the loader, never keep home content hidden. */
html.skip-loading-screen body.home:not(.loaded) .lms-main,
html.skip-loading-screen body.home:not(.loaded) .lms-header {
    opacity: 1 !important;
    visibility: visible !important;
    transition: none !important;
}

.page-transition-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    z-index: 9998;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.14s ease, visibility 0.14s ease;
    will-change: opacity, visibility;
}

.page-transition-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.page-transition-overlay.fade-out {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-content {
    text-align: center;
    max-width: 400px;
    padding: 2rem;
    transform: translateY(0);
    transition: transform 0.14s ease;
    position: relative;
    z-index: 2;
}

.loading-logo {
    display: block;
    width: 180px;
    max-width: 100%;
    height: auto;
    max-height: none;
    margin: 0 auto 2rem;
    opacity: 0.95;
    object-fit: contain;
    object-position: center;
}

.loading-spinner {
    margin: 1.5rem auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.spinner-ring {
    display: block;
    width: 50px;
    height: 50px;
    border: 3px solid rgba(17, 87, 64, 0.15);
    border-radius: 50%;
    border-top: 3px solid #115740;
    border-right: 3px solid #115740;
    box-sizing: border-box;
    animation: spinSmooth 1.2s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
    will-change: transform;
    transform-origin: center center;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.loading-text {
    font-size: 1.1rem;
    color: #6c757d;
    animation: pulseSmooth 2s ease-in-out infinite;
    will-change: opacity;
}

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

@keyframes pulseSmooth {
    0%, 100% { 
        opacity: 0.7; 
    }
    50% { 
        opacity: 1; 
    }
}

body.dark-mode .loading-screen {
    background-color: #1a1a1a;
}

body.dark-mode .page-transition-overlay {
    background-color: #1a1a1a;
}

body.dark-mode .loading-text {
    color: rgba(255, 255, 255, 0.8);
}

body.dark-mode .spinner-ring {
    border-color: rgba(255, 255, 255, 0.15);
    border-top-color: #1a805f;
    border-right-color: #1a805f;
}

/* ===== STREAMLINED ANIMATED TRIANGLES FOR MAIN LOADING SCREEN ===== */

.loading-triangles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
    z-index: 1;
}

.loading-triangle {
    position: absolute;
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
    will-change: transform;
}

/* Triangle 1 - Gentle floating motion */
.triangle-move-1 {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(17, 87, 64, 0.15), rgba(26, 128, 95, 0.2));
    left: 15%;
    top: 25%;
    animation: gentleFloat1 6s ease-in-out infinite;
    animation-delay: 0s;
}

/* Triangle 2 - Subtle rotation and scale */
.triangle-move-2 {
    width: 35px;
    height: 35px;
    background: linear-gradient(135deg, rgba(26, 128, 95, 0.12), rgba(17, 87, 64, 0.18));
    right: 20%;
    top: 45%;
    animation: gentleFloat2 8s ease-in-out infinite;
    animation-delay: 2s;
}

/* Triangle 3 - Minimal movement */
.triangle-move-3 {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, rgba(17, 87, 64, 0.1), rgba(26, 128, 95, 0.15));
    left: 50%;
    bottom: 20%;
    margin-left: -20px;
    animation: gentleFloat3 7s ease-in-out infinite;
    animation-delay: 4s;
}

/* Streamlined Animation Keyframes */
@keyframes gentleFloat1 {
    0%, 100% {
        transform: translateY(0) rotate(0deg) scale(1);
        opacity: 0.6;
    }
    50% {
        transform: translateY(-8px) rotate(15deg) scale(1.05);
        opacity: 0.8;
    }
}

@keyframes gentleFloat2 {
    0%, 100% {
        transform: translateY(0) rotate(0deg) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translateY(6px) rotate(-10deg) scale(1.03);
        opacity: 0.7;
    }
}

@keyframes gentleFloat3 {
    0%, 100% {
        transform: translateY(0) rotate(0deg) scale(1);
        opacity: 0.4;
    }
    50% {
        transform: translateY(-4px) rotate(8deg) scale(1.02);
        opacity: 0.6;
    }
}

/* Remove unused triangles from HTML */
.triangle-move-4,
.triangle-move-5,
.triangle-move-6,
.triangle-static-1,
.triangle-static-2,
.triangle-immediate {
    display: none;
}

/* Dark mode styles for loading triangles */
body.dark-mode .triangle-move-1 {
    background: linear-gradient(135deg, rgba(26, 128, 95, 0.08), rgba(17, 87, 64, 0.12));
}

body.dark-mode .triangle-move-2 {
    background: linear-gradient(135deg, rgba(17, 87, 64, 0.06), rgba(26, 128, 95, 0.09));
}

body.dark-mode .triangle-move-3 {
    background: linear-gradient(135deg, rgba(26, 128, 95, 0.05), rgba(17, 87, 64, 0.08));
}

@media (prefers-reduced-motion: reduce) {
    .loading-screen,
    .page-transition-overlay,
    .loading-content {
        transition-duration: 0.01ms !important;
    }

    .spinner-ring,
    .loading-text,
    .triangle-move-1,
    .triangle-move-2,
    .triangle-move-3 {
        animation: none !important;
    }
}