/* Professional Page Transition Loader - Only covers content area, not header */
.navigation-loader {
    position: fixed;
    top: var(--header-height, 100px); /* Start below the header */
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height, 100px)); /* Cover only content area */
    z-index: 999; /* Below header (header is z-index: 1000) */
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(4px);
    animation: fadeInOverlay 0.2s ease-out, fadeOutOverlay 0.2s ease-out 0.3s forwards;
}

/* When loader is being removed, fade out smoothly */
@keyframes fadeOutOverlay {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes fadeInOverlay {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

/* Modern Spinner */
.navigation-loader-spinner {
    width: 50px;
    height: 50px;
    position: relative;
}

.navigation-loader-spinner::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 4px solid rgba(255, 107, 53, 0.2);
    border-radius: 50%;
}

.navigation-loader-spinner::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 4px solid transparent;
    border-top-color: #ff6b35;
    border-right-color: #00d4aa;
    border-radius: 50%;
    animation: spinLoader 0.8s linear infinite;
}

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

/* Top Progress Bar */
.navigation-loader::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #ff6b35, #00d4aa);
    animation: progressBar 0.8s ease-out;
    transform-origin: left;
    z-index: 100000;
}

@keyframes progressBar {
    0% {
        transform: scaleX(0);
    }
    100% {
        transform: scaleX(1);
    }
}

/* ========================================
   SMOOTH PAGE TRANSITIONS
   Modern animated transitions between pages
   ======================================== */

/* Main content wrapper - animated on page changes */
.main-content {
    animation: pageSlideIn 0.4s ease-out;
}

/* Page slide-in from bottom with fade */
@keyframes pageSlideIn {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Alternative: Slide from right (uncomment to use) */
/*
@keyframes pageSlideIn {
    0% {
        opacity: 0;
        transform: translateX(50px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}
*/

/* Smooth fade transition for page container */
.page-container {
    animation: pageFadeIn 0.3s ease-out;
}

@keyframes pageFadeIn {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

/* Alternative minimal loader (just top bar) */
.navigation-loader.minimal {
    background: transparent;
    backdrop-filter: none;
    height: 3px;
    align-items: flex-start;
}

.navigation-loader.minimal .navigation-loader-spinner {
    display: none;
}

.navigation-loader.minimal::before {
    position: absolute;
}