/* ========================================
   Scroll Direction - Hide/Show Header
   ======================================== */

/* Add smooth transition to header elements */
.action-bar,
.navigation-menu {
    transition: transform 0.3s ease-in-out;
}

/* Hide header when scrolling down */
.action-bar.header-hidden {
    transform: translateY(-100%);
}

.navigation-menu.header-hidden {
    transform: translateY(-100%);
}

/* ========================================
   Back to Top Button
   ======================================== */

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--black-bar);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 99;
    transition: all 0.3s ease;
    opacity: 0.2;
}

.back-to-top:hover {
    opacity: 1;
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
    background: #27ae60;
}

.back-to-top.at-bottom {
    opacity: 1;
    background: #27ae60;
}

.back-to-top:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 45px;
        height: 45px;
    }
}

/* ========================================
   Info Button (Bottom Left)
   ======================================== */

.info-button {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    width: 50px;
    height: 50px;
    background: var(--black-bar);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 99;
    transition: all 0.3s ease;
    opacity: 0.6; /* Increased from 0.2 for better discoverability */
}

.info-button:hover {
    opacity: 1;
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
    background: #27ae60;
}

.info-button.at-bottom {
    opacity: 1;
    background: #27ae60;
}

.info-button:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
}

/* Mobile adjustments - Flexbox button layout at bottom center */
@media (max-width: 900px) {
    /* Hide zoom control on mobile (keyboard shortcuts now visible) */
    .zoom-toggle-btn,
    .zoom-control {
        display: none !important;
    }

    /* Reset fixed positioning for FLEXBOX buttons on mobile (exclude back-to-top) */
    .download-btn,
    .print-friendly-btn,
    .shortcuts-btn,
    .info-button {
        position: fixed !important;
        bottom: 1.5rem !important;
        left: auto !important;
        right: auto !important;
        width: 50px !important;
        height: 50px !important;
        /* Removed opacity: 1 !important to allow .footer-hovered to work */
        transform: none !important;
    }

    /* Mobile: Show colors at full opacity (no transparency with blur bar) */
    .download-btn {
        background: rgba(205, 96, 96, 1) !important; /* PDF red - full opacity */
        opacity: 1 !important; /* Override base opacity */
    }

    .print-friendly-btn {
        background: rgba(255, 255, 255, 1) !important; /* White - full opacity */
        opacity: 1 !important; /* Override base opacity */
    }

    .print-friendly-btn iconify-icon {
        color: #27ae60 !important; /* Green icon */
    }

    .shortcuts-btn {
        background: rgba(243, 156, 18, 1) !important; /* Orange - full opacity */
        opacity: 1 !important; /* Override base opacity */
    }

    .info-button {
        background: rgba(39, 174, 96, 1) !important; /* Green - full opacity */
        opacity: 1 !important; /* Override base opacity */
    }

    .back-to-top {
        background: rgba(39, 174, 96, 1) !important; /* Green - full opacity */
        opacity: 1 !important; /* Full opacity (no transparency with blur bar) */
    }

    /* Flexbox container behavior - buttons arrange themselves */
    /* Buttons will be positioned using JavaScript or individual positioning */
    /* For now, use fixed spacing from center */

    /* 6 buttons: Download, Print, Shortcuts, Theme, Info, Back-to-top */
    /* Spacing: 10px gap between buttons, centered horizontally */
    /* Total width: 6 * 50px + 5 * 10px = 350px */
    /* Start position: 50% - 175px */

    .download-btn {
        left: calc(50% - 175px) !important; /* First button */
    }

    .print-friendly-btn {
        left: calc(50% - 115px) !important; /* Second button */
    }

    .shortcuts-btn {
        left: calc(50% - 55px) !important; /* Third button */
    }

    /* Theme switcher button - fourth position (defined in color-theme.css) */
    /* left: calc(50% + 5px) !important; */

    .info-button {
        left: calc(50% + 65px) !important; /* Fifth button */
    }

    /* Back-to-top button - now part of the button row (sixth button) */
    .back-to-top {
        position: fixed !important;
        bottom: 1.5rem !important;
        left: calc(50% + 125px) !important; /* Sixth button (last) */
        right: auto !important; /* Override previous right positioning */
        width: 50px !important;
        height: 50px !important;
        /* Removed fixed opacity - will be controlled by .at-bottom class */
        display: flex !important; /* Ensure it's always displayed */
    }

    /* Always show back-to-top on mobile (don't wait for scroll) */
    .back-to-top:hover {
        opacity: 1 !important;
    }

    /* Hover effects - Full color opacity on hover */
    .download-btn:hover,
    .download-btn.pdf-hover-sync {
        background: rgba(205, 96, 96, 1) !important; /* Full red opacity */
        transform: translateY(-3px) !important;
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4) !important;
    }

    .print-friendly-btn:hover,
    .print-friendly-btn.print-hover-sync {
        background: rgba(255, 255, 255, 1) !important; /* Full white opacity */
        transform: translateY(-3px) !important;
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4) !important;
    }

    .shortcuts-btn:hover {
        background: rgba(243, 156, 18, 1) !important; /* Full orange opacity */
        transform: translateY(-3px) !important;
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4) !important;
    }

    .info-button:hover {
        background: rgba(39, 174, 96, 1) !important; /* Full green opacity */
        transform: translateY(-3px) !important;
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4) !important;
    }

    .back-to-top:hover {
        background: rgba(39, 174, 96, 1) !important; /* Full green opacity */
        transform: translateY(-3px) !important;
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4) !important;
    }

    /* Keep at-bottom state - full opacity colors for each button */
    .download-btn.at-bottom {
        background: rgba(205, 96, 96, 1) !important; /* Full red opacity */
        opacity: 1 !important;
        transform: none !important;
    }

    .print-friendly-btn.at-bottom {
        background: rgba(255, 255, 255, 1) !important; /* Full white opacity */
        opacity: 1 !important;
        transform: none !important;
    }

    .shortcuts-btn.at-bottom {
        background: rgba(243, 156, 18, 1) !important; /* Full orange opacity */
        opacity: 1 !important;
        transform: none !important;
    }

    .info-button.at-bottom {
        background: rgba(39, 174, 96, 1) !important; /* Full green opacity */
        opacity: 1 !important;
        transform: none !important;
    }

    .back-to-top.at-bottom {
        background: rgba(39, 174, 96, 1) !important; /* Full green opacity - NO transparency */
        opacity: 1 !important;
        transform: none !important;
    }

    /* Make all buttons semi-transparent when footer is hovered (applied via JS) */
    .download-btn.footer-hovered,
    .print-friendly-btn.footer-hovered,
    .shortcuts-btn.footer-hovered,
    .info-button.footer-hovered,
    .back-to-top.footer-hovered,
    .color-theme-switcher.footer-hovered {
        opacity: 0.2 !important; /* Make buttons very transparent to see footer */
        pointer-events: none !important; /* Prevent interaction when footer is hovered */
    }
}

/* Very narrow mobile - Stack buttons vertically or adjust spacing if needed */
@media (max-width: 483px) {
    /* For very narrow screens, you may need to adjust button spacing or size */
    /* For now, keep the same horizontal layout but buttons might overflow slightly */
    /* Users can scroll horizontally if needed, or we can reduce button sizes */
}

/* ========================================
   Mobile: Keep action bar visible (prevent hiding on scroll)
   ======================================== */
@media (max-width: 900px) {
    /* Prevent action bar from hiding on scroll on mobile */
    .action-bar.header-hidden {
        transform: translateY(0) !important; /* Override hide behavior */
    }

    .navigation-menu.header-hidden {
        transform: translateY(0) !important; /* Override hide behavior */
    }

    /* Add bottom padding to footer so text isn't hidden behind button bar */
    footer.no-print {
        padding-bottom: 120px !important; /* More clearance for 6 buttons + spacing */
        transition: all 0.3s ease;
        z-index: 1 !important; /* Keep footer behind buttons (buttons have z-index: 99) */
        position: relative;
    }

    /* Footer hover effect - enlarge text when touched (for button transparency) */
    footer.no-print.footer-hovered {
        /* Only used for button transparency interaction */
    }

    /* Footer text automatically enlarges when at page bottom */
    footer.no-print.at-bottom {
        padding-bottom: 130px !important; /* Extra space when enlarged */
    }

    footer.no-print.at-bottom p,
    footer.no-print.at-bottom a {
        font-size: 1.2em !important;
        font-weight: 500 !important;
        transition: all 0.3s ease;
    }
}