/* style.css - Main styles for the GK-2A browser */

/* ============================================================
   1. Design tokens
   ============================================================ */
:root {
    --ink:          #1e2a3a;
    --ink-soft:     #5a6f82;
    --ink-faint:    #8899aa;

    --navy:         #0b1a2b;
    --navy-2:       #13293f;
    --navy-3:       #2a4b6e;

    --accent:       #2a7faa;
    --accent-bright:#4db8e8;
    --accent-soft:  #eaf4fb;

    --surface:      #ffffff;
    --surface-alt:  #f0f5fa;
    --line:         #e3eaf2;

    --bg:           #eef3fa;

    --radius:       14px;
    --radius-sm:    9px;

    --shadow-sm: 0 1px 2px rgba(11,26,43,.06), 0 1px 3px rgba(11,26,43,.05);
    --shadow-md: 0 6px 20px -8px rgba(11,26,43,.18), 0 1px 3px rgba(11,26,43,.05);
    --shadow-lg: 0 22px 45px -22px rgba(11,26,43,.45);

    --ease: cubic-bezier(.22,.61,.36,1);
}

/* ----- Reset & base ----- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
    background:
        radial-gradient(1100px 600px at 10% -12%, #d9e9f9 0%, transparent 62%),
        radial-gradient(900px 520px at 102% -4%, #e4f0fb 0%, transparent 58%),
        var(--bg);
    background-attachment: fixed;
    color: var(--ink);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

::selection {
    background: rgba(77,184,232,.3);
    color: var(--navy);
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Accessible focus ring for every interactive element */
a:focus-visible {
    outline: 2px solid var(--accent-bright);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ----- Menu bar ----- */
.menubar {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 55%, #16334d 100%);
    color: white;
    padding: 0.75rem 0;
    box-shadow: 0 6px 24px -10px rgba(11,26,43,.65);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* glowing hairline along the bottom edge */
.menubar::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(77,184,232,.65) 50%,
        transparent 100%);
}

.menubar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
}

.logo a {
    display: inline-block;
    line-height: 0;
    transition: transform .25s var(--ease), filter .25s var(--ease);
}

.logo a:hover {
    transform: translateY(-1px);
    filter: drop-shadow(0 0 10px rgba(77,184,232,.55));
}

.logo img {
    height: 40px;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    position: relative;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-weight: 500;
    padding: 0.3rem 0.5rem;
    border-radius: 6px;
    transition: background 0.2s, color 0.2s, transform 0.2s var(--ease);
}

/* animated gradient underline */
.nav-links a::after {
    content: "";
    position: absolute;
    left: 0.5rem;
    right: 0.5rem;
    bottom: 0.05rem;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent-bright), #8fdcff);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform .28s var(--ease);
}

.nav-links a:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
    transform: translateY(-1px);
}

.nav-links a:hover::after {
    transform: scaleX(1);
}

.nav-links a.active {
    background: linear-gradient(135deg, var(--navy-3), var(--accent));
    color: #fff;
    box-shadow: 0 4px 14px -6px rgba(42,127,170,.9),
                inset 0 1px 0 rgba(255,255,255,.14);
}

.nav-links a.active::after {
    display: none;
}

/* ----- Main content ----- */
main.container {
    flex: 1;
    margin-top: 2rem;
}

h1 {
    position: relative;
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
    color: var(--navy);
    padding-left: 1.15rem;
    border-left: none;
}

/* gradient accent bar with a soft glow */
h1::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.16em;
    bottom: 0.16em;
    width: 5px;
    border-radius: 3px;
    background: linear-gradient(180deg, var(--accent-bright), var(--accent));
    box-shadow: 0 0 14px rgba(77,184,232,.55);
}

/* ----- Breadcrumb ----- */
.breadcrumb {
    background: rgba(255,255,255,.78);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 0.6rem 1rem;
    border: 1px solid rgba(255,255,255,.9);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.3rem 0.5rem;
    font-size: 0.95rem;
}

.breadcrumb a {
    color: #1e6f9f;
    text-decoration: none;
    font-weight: 500;
    padding: 0.05rem 0.25rem;
    border-radius: 5px;
    transition: background .18s var(--ease), color .18s var(--ease);
}

.breadcrumb a:hover {
    text-decoration: none;
    background: var(--accent-soft);
    color: var(--accent);
}

.breadcrumb .sep {
    color: var(--ink-faint);
    font-weight: 300;
    margin: 0 0.1rem;
}

.breadcrumb .current {
    font-weight: 600;
    color: var(--navy);
}

/* ----- File listing – now truly wider ----- */
.file-listing {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    animation: riseIn .45s var(--ease) both;
}

@keyframes riseIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: none; }
}

.item {
    border-bottom: 1px solid var(--line);
    transition: background 0.15s;
}

.item:last-child {
    border-bottom: none;
}

/*
   The clickable row now spans 100% of its parent.
   Added width:100% and bigger padding.
*/
.item-link {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;                /* forces full width */
    padding: 0.8rem 1.5rem;     /* more horizontal space */
    gap: 1.2rem;                /* bigger gap between icon, name, meta */
    text-decoration: none;
    color: var(--ink);
    box-sizing: border-box;     /* keeps padding inside the width */
    transition: background 0.15s;
}

/* left accent bar that slides in on hover */
.item-link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--accent-bright), var(--accent));
    transform: scaleY(0);
    transform-origin: center;
    transition: transform .28s var(--ease);
}

.item-link:hover {
    background: linear-gradient(90deg, var(--surface-alt) 0%, #f7fbfe 100%);
}

.item-link:hover::before {
    transform: scaleY(1);
}

.item .icon {
    font-size: 1.3rem;
    width: 3.3rem;
    height: 2.25rem;
    display: grid;
    place-items: center;
    padding-left: 4.5px;
    border-radius: 10px;
    background: var(--surface-alt);
    color: var(--accent);
    flex-shrink: 0;
    transition: background .22s var(--ease),
                color .22s var(--ease),
                transform .22s var(--ease),
                box-shadow .22s var(--ease);
}

/* subtle tinting per entry type */
.item.folder .icon {
    background: #eaf4fb;
    color: #1e6f9f;
}

.item.parent .icon {
    background: #e8eff7;
    color: #1a4b6d;
}

/* hover state must come last so it wins the cascade */
.item-link:hover .icon {
    background: linear-gradient(135deg, var(--accent-bright), var(--accent));
    color: #fff;
    transform: scale(1.08);
    box-shadow: 0 6px 16px -8px rgba(42,127,170,.95);
}

/* Name takes all leftover space, pushing meta to the far right */
.item .name {
    flex: 1;                    /* takes all available space */
    min-width: 0;
    font-weight: 500;
    word-break: break-word;
}

/* Meta text stays on the right side without wrapping */
.item .meta {
    flex-shrink: 0;             /* never shrinks */
    font-size: 0.78rem;
    color: var(--ink-soft);
    white-space: nowrap;
    padding: 0.18rem 0.65rem;
    border-radius: 999px;
    background: var(--surface-alt);
    border: 1px solid transparent;
    font-variant-numeric: tabular-nums;
    transition: background .2s var(--ease),
                color .2s var(--ease),
                border-color .2s var(--ease);
}

.item-link:hover .meta {
    background: #fff;
    border-color: var(--line);
    color: var(--accent);
}

.item.parent .name {
    font-weight: 600;
    color: #1e6f9f;
}

.item.folder .name {
    color: #1a4b6d;
}

.item.file .name {
    color: var(--ink);
}

.empty-state {
    padding: 2.5rem 1rem;
    text-align: center;
    color: var(--ink-soft);
    font-size: 1.05rem;
    letter-spacing: 0.2px;
}

/* ----- Directory info footer ----- */
.dir-info {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding: 0.5rem 0.2rem;
    font-size: 0.9rem;
    color: #3a4f62;
}

.dir-info span {
    background: var(--surface);
    padding: 0.25rem 0.85rem;
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.dir-info span:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ----- Error messages ----- */
.error {
    background: linear-gradient(135deg, #fff0f1 0%, #ffe6e8 100%);
    color: #b71c1c;
    padding: 1rem 1.1rem;
    border-radius: var(--radius-sm);
    border-left: 5px solid #c62828;
    box-shadow: 0 6px 18px -12px rgba(198,40,40,.7);
    margin: 1rem 0;
}

/* ----- Thin Footer ----- */
.footer {
    position: relative;
    margin-top: 3rem;
    padding: 1rem 0;
    border-top: 1px solid #dce3ec;
    background: rgba(249,250,250,1);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    color: var(--ink-soft);
    font-size: 0.9rem;
    text-align: center;
    flex-shrink: 0;
}

.footer p {
    margin: 0;
    letter-spacing: 0.3px;
}

/* ----- Scrollbar polish ----- */
* {
    scrollbar-width: thin;
    scrollbar-color: #b9cbdd transparent;
}

*::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

*::-webkit-scrollbar-track {
    background: transparent;
}

*::-webkit-scrollbar-thumb {
    background: #b9cbdd;
    border: 3px solid transparent;
    background-clip: content-box;
    border-radius: 999px;
}

*::-webkit-scrollbar-thumb:hover {
    background: #93aec6;
    background-clip: content-box;
}

/* ----- Responsive tweaks ----- */
@media (max-width: 600px) {
    .menubar-inner {
        flex-direction: column;
        align-items: stretch;
        gap: 0.3rem;
    }
    .nav-links {
        justify-content: center;
    }
    .logo {
        text-align: center;
    }
    .logo a {
        display: inline-block;
    }
    .item-link {
        flex-wrap: wrap;
        gap: 0.3rem;
        padding: 0.6rem 1rem;
    }
    .item .meta {
        margin-left: 0;
        white-space: normal;
    }
    h1 {
        font-size: 1.6rem;
    }
    .container {
        padding: 0 1.25rem;
    }
}

/* ----- Respect reduced-motion preferences ----- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}