/* ============================================
   Modern Pre-loader Styles
   Using System Root Colors
   ============================================ */

/* Preloader Overlay */
.preloader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 99999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

/* Preloader Container */
.preloader-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

/* Glassmorphism Card */
.preloader-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(3, 105, 161, 0.3);
    border-radius: 24px;
    padding: 40px 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    box-shadow:
        0 8px 32px rgba(3, 105, 161, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    animation: floatCard 3s ease-in-out infinite;
}

@keyframes floatCard {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Main Spinner - Triple Ring Design */
.preloader-spinner {
    position: relative;
    width: 80px;
    height: 80px;
}

.preloader-spinner .ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 3px solid transparent;
}

/* Using system primary-blue colors */
.preloader-spinner .ring:nth-child(1) {
    border-top-color: var(--primary-blue, #0369A1);
    animation: spin 1.2s linear infinite;
}

.preloader-spinner .ring:nth-child(2) {
    width: 70%;
    height: 70%;
    top: 15%;
    left: 15%;
    border-right-color: var(--primary-blue-hover, #0284C7);
    animation: spin 1.5s linear infinite reverse;
}

.preloader-spinner .ring:nth-child(3) {
    width: 40%;
    height: 40%;
    top: 30%;
    left: 30%;
    border-bottom-color: var(--accent-green, #10B981);
    animation: spin 1s linear infinite;
}

/* Center Dot */
.preloader-spinner .center-dot {
    position: absolute;
    width: 12px;
    height: 12px;
    background: linear-gradient(135deg, var(--primary-blue, #0369A1), var(--accent-green, #10B981));
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 1.5s ease-in-out infinite;
}

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

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.3);
        opacity: 0.7;
    }
}

/* Loading Text */
.preloader-text {
    color: #fff;
    font-family: 'Cairo', sans-serif;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.preloader-text span {
    animation: textFade 1.5s ease-in-out infinite;
}

@keyframes textFade {
    0%, 100% {
        opacity: 0.5;
    }
    50% {
        opacity: 1;
    }
}

/* Progress Bar */
.preloader-progress {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

.preloader-progress-bar {
    height: 100%;
    background: linear-gradient(90deg,
        var(--primary-blue-dark, #0A4C7A),
        var(--primary-blue, #0369A1),
        var(--primary-blue-hover, #0284C7),
        var(--accent-green, #10B981),
        var(--primary-blue, #0369A1));
    background-size: 300% 100%;
    border-radius: 2px;
    animation: progressShimmer 2s ease-in-out infinite;
}

@keyframes progressShimmer {
    0% {
        background-position: 100% 0;
        width: 0%;
    }
    50% {
        width: 70%;
    }
    100% {
        background-position: 0% 0;
        width: 100%;
    }
}

/* Floating Particles */
.preloader-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: rgba(3, 105, 161, 0.4);
    border-radius: 50%;
    animation: float 4s ease-in-out infinite;
}

.particle:nth-child(odd) {
    background: rgba(16, 185, 129, 0.4);
}

.particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; }
.particle:nth-child(2) { left: 20%; top: 80%; animation-delay: 0.5s; }
.particle:nth-child(3) { left: 80%; top: 30%; animation-delay: 1s; }
.particle:nth-child(4) { left: 70%; top: 70%; animation-delay: 1.5s; }
.particle:nth-child(5) { left: 40%; top: 10%; animation-delay: 2s; }
.particle:nth-child(6) { left: 90%; top: 50%; animation-delay: 2.5s; }
.particle:nth-child(7) { left: 5%; top: 60%; animation-delay: 3s; }
.particle:nth-child(8) { left: 60%; top: 90%; animation-delay: 3.5s; }

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-20px) scale(1.2);
        opacity: 0.8;
    }
}

/* Mini Loader for buttons and small areas */
.mini-loader {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.mini-loader .dot {
    width: 6px;
    height: 6px;
    background: currentColor;
    border-radius: 50%;
    animation: miniPulse 1.4s ease-in-out infinite;
}

.mini-loader .dot:nth-child(1) { animation-delay: 0s; }
.mini-loader .dot:nth-child(2) { animation-delay: 0.2s; }
.mini-loader .dot:nth-child(3) { animation-delay: 0.4s; }

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

/* Button Loading State */
.btn-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.8;
}

.btn-loading .btn-text {
    visibility: hidden;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--muted, #F1F5F9) 25%,
        var(--border, #E2E8F0) 50%,
        var(--muted, #F1F5F9) 75%
    );
    background-size: 200% 100%;
    animation: skeletonShimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm, 4px);
}

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

/* Page Transition Loader - Top Bar */
.page-loader-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg,
        var(--primary-blue-dark, #0A4C7A),
        var(--primary-blue, #0369A1),
        var(--accent-green, #10B981));
    z-index: 100000;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(3, 105, 161, 0.5);
}

.page-loader-bar.active {
    animation: pageLoad 2s ease-in-out forwards;
}

.page-loader-bar.complete {
    width: 100%;
    animation: pageComplete 0.3s ease-out forwards;
}

@keyframes pageLoad {
    0% {
        width: 0%;
    }
    20% {
        width: 30%;
    }
    50% {
        width: 60%;
    }
    80% {
        width: 80%;
    }
    100% {
        width: 90%;
    }
}

@keyframes pageComplete {
    0% {
        width: 90%;
        opacity: 1;
    }
    100% {
        width: 100%;
        opacity: 0;
    }
}

/* Responsive Adjustments */
@media (max-width: 576px) {
    .preloader-card {
        padding: 30px 40px;
    }

    .preloader-spinner {
        width: 60px;
        height: 60px;
    }

    .preloader-text {
        font-size: 14px;
    }

    .preloader-progress {
        width: 160px;
    }
}

/* Light Theme Preloader */
@media (prefers-color-scheme: light) {
    .preloader-overlay {
        background: rgba(249, 250, 251, 0.9);
    }

    .preloader-card {
        background: var(--surface, #FFFFFF);
        border: 1px solid var(--border, #E2E8F0);
        box-shadow: var(--shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.1));
    }

    .preloader-text {
        color: var(--text-primary, #1E293B);
    }

    .preloader-progress {
        background: var(--muted, #F1F5F9);
    }

    .particle {
        background: rgba(3, 105, 161, 0.2);
    }

    .particle:nth-child(odd) {
        background: rgba(16, 185, 129, 0.2);
    }
}