/* ===========================================================================
   TechRealm — UI Enhancement Layer  (enhance.css)
   Purely additive polish on top of the Bringer base. Loaded LAST so these
   refinements win the cascade. Everything below re-uses the existing design
   tokens in config.css (--bringer-s-accent, --bringer-s-heading, …) so the
   brand stays perfectly consistent. Safe to remove without breaking the site.
   =========================================================================== */

:root {
    --tr-accent: var(--bringer-s-accent, #3F6EE9);
    --tr-accent-bright: var(--bringer-s-text-accent, #5C9DFF);
    --tr-ease: cubic-bezier(0.22, 1, 0.36, 1);
    --tr-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --tr-glow: 0 0 0 1px var(--bringer-s-border-accent, #5C9DFF80),
               0 18px 44px -18px rgba(63, 110, 233, 0.55);
}

/* --- Nicer text selection -------------------------------------------------- */
::selection {
    background: var(--tr-accent-bright);
    color: #07090D;
}

/* --- Accessible focus ring (keyboard only) --------------------------------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible,
.bringer-button:focus-visible {
    outline: 2px solid var(--tr-accent-bright);
    outline-offset: 3px;
    border-radius: 6px;
}
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) { outline: none; }

/* --- Buttery-smooth scroll behaviour --------------------------------------- */
html { scroll-behavior: smooth; }

/* ===========================================================================
   Scroll progress bar  (populated by enhance.js)
   =========================================================================== */
#tr-scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0;
    z-index: 100000;
    pointer-events: none;
    background: linear-gradient(90deg, var(--tr-accent), var(--tr-accent-bright));
    box-shadow: 0 0 12px var(--tr-accent-bright);
    transition: width 0.08s linear;
    will-change: width;
}

/* ===========================================================================
   Buttons — subtle lift + animated sheen
   =========================================================================== */
.bringer-button {
    position: relative;
    overflow: hidden;
    transition: transform 0.35s var(--tr-ease),
                box-shadow 0.35s var(--tr-ease),
                background-color 0.25s ease;
    isolation: isolate;
}
.bringer-button::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(120deg, transparent 20%, rgba(255,255,255,0.22) 50%, transparent 80%);
    transform: translateX(-130%);
    transition: transform 0.7s var(--tr-ease-out);
}
.bringer-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--tr-glow);
}
.bringer-button:hover::after { transform: translateX(130%); }
.bringer-button:active { transform: translateY(0) scale(0.985); }

/* Ripple (spawned by enhance.js) */
.tr-ripple {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    background: rgba(255, 255, 255, 0.35);
    pointer-events: none;
    animation: tr-ripple 0.6s var(--tr-ease-out) forwards;
    z-index: 0;
}
@keyframes tr-ripple { to { transform: scale(2.6); opacity: 0; } }

/* ===========================================================================
   Nav links — animated underline reveal
   =========================================================================== */
.bringer-nav .main-menu > li > a {
    position: relative;
}
.bringer-nav .main-menu > li > a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    height: 2px;
    width: 100%;
    background: linear-gradient(90deg, var(--tr-accent), var(--tr-accent-bright));
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.35s var(--tr-ease);
}
.bringer-nav .main-menu > li > a:hover::after,
.bringer-nav .main-menu > li.current-menu-parent > a::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* ===========================================================================
   Cards — gentle elevation + image zoom on hover
   =========================================================================== */
.bringer-portfolio-card {
    transition: transform 0.5s var(--tr-ease), box-shadow 0.5s var(--tr-ease);
    will-change: transform;
}
.bringer-portfolio-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.65),
                0 0 0 1px var(--bringer-s-border-highlight, #F5F7FA40);
}
.bringer-portfolio-card-image {
    overflow: hidden;
}
.bringer-portfolio-card-image img {
    transition: transform 0.7s var(--tr-ease-out);
    will-change: transform;
}
.bringer-portfolio-card:hover .bringer-portfolio-card-image img {
    transform: scale(1.045);
}

/* Detailed-list (service) buttons — arrow nudge */
.bringer-detailed-list-button,
.bringer-icon-explore {
    transition: transform 0.35s var(--tr-ease), color 0.25s ease;
}
.bringer-detailed-list-title:hover .bringer-icon-explore,
.bringer-detailed-list-button:hover .bringer-icon-explore {
    transform: translateX(5px);
}

/* ===========================================================================
   Loader — replace the plain blue spinner with a branded dual-ring
   =========================================================================== */
#loader {
    border: 4px solid rgba(92, 157, 255, 0.15) !important;
    border-top-color: var(--tr-accent-bright) !important;
    border-right-color: var(--tr-accent) !important;
    width: 54px !important;
    height: 54px !important;
    box-shadow: 0 0 30px -6px var(--tr-accent);
}
#loader-wrapper {
    background: radial-gradient(circle at 50% 42%, #10131b 0%, #07090D 70%) !important;
}
#loader-wrapper::after {
    content: "TechRealm";
    position: absolute;
    top: calc(50% + 56px);
    left: 50%;
    transform: translateX(-50%);
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    letter-spacing: 0.28em;
    font-size: 12px;
    text-transform: uppercase;
    color: var(--bringer-s-heading-fade, #F5F7FAC0);
    animation: tr-pulse 1.6s ease-in-out infinite;
}
@keyframes tr-pulse { 0%,100% { opacity: 0.35; } 50% { opacity: 1; } }

/* ===========================================================================
   Back-to-top floating button  (injected by enhance.js)
   =========================================================================== */
#tr-to-top {
    position: fixed;
    right: clamp(16px, 3vw, 34px);
    bottom: clamp(16px, 3vw, 34px);
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    z-index: 99990;
    cursor: pointer;
    color: #fff;
    background: linear-gradient(135deg, var(--tr-accent), var(--tr-accent-bright));
    border: 1px solid var(--bringer-s-border-accent, #5C9DFF80);
    box-shadow: 0 14px 34px -12px rgba(63, 110, 233, 0.7);
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px) scale(0.85);
    transition: opacity 0.4s var(--tr-ease), transform 0.4s var(--tr-ease),
                box-shadow 0.3s ease;
}
#tr-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
#tr-to-top:hover {
    transform: translateY(-3px) scale(1.06);
    box-shadow: 0 20px 42px -12px rgba(63, 110, 233, 0.9);
}
#tr-to-top:active { transform: scale(0.94); }
#tr-to-top svg { width: 20px; height: 20px; display: block; }

/* Circular progress ring around the button */
#tr-to-top .tr-ring {
    position: absolute;
    inset: -4px;
    transform: rotate(-90deg);
    pointer-events: none;
}
#tr-to-top .tr-ring circle {
    fill: none;
    stroke: rgba(255,255,255,0.85);
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-dasharray: var(--tr-ring-len, 163);
    stroke-dashoffset: var(--tr-ring-len, 163);
    transition: stroke-dashoffset 0.1s linear;
}

/* ===========================================================================
   Form fields — clearer focus + valid/invalid affordances
   =========================================================================== */
input:not([type=checkbox]):not([type=radio]),
textarea,
select {
    transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}
input:not([type=checkbox]):not([type=radio]):focus,
textarea:focus,
select:focus {
    box-shadow: 0 0 0 3px rgba(92, 157, 255, 0.22);
}

/* ===========================================================================
   Lazy-image fade-in polish
   =========================================================================== */
img.bringer-lazy {
    transition: opacity 0.6s ease, filter 0.6s ease;
}
img.bringer-lazy:not(.loaded):not([data-tr-ready]) {
    opacity: 0.001;
    filter: blur(8px);
}

/* ===========================================================================
   Reveal-on-scroll helper (progressive enhancement, class added by JS)
   =========================================================================== */
.tr-reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.7s var(--tr-ease-out), transform 0.7s var(--tr-ease-out);
    will-change: opacity, transform;
}
.tr-reveal.tr-in { opacity: 1; transform: none; }

/* ===========================================================================
   Respect reduced-motion — kill the extra motion we introduced
   =========================================================================== */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .bringer-button,
    .bringer-button::after,
    .bringer-portfolio-card,
    .bringer-portfolio-card-image img,
    #tr-to-top,
    .tr-reveal,
    .bringer-nav .main-menu > li > a::after {
        transition: none !important;
        animation: none !important;
        transform: none !important;
    }
    .tr-reveal { opacity: 1; }
}