/* ================================================================
   FOLDER COMPONENT — Vanilla CSS  (converted from Folder.jsx)
   ================================================================ */

/* ── Wrapper ── */
.folder-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.7rem;
    cursor: pointer;
    padding-top: 2.5rem;   /* room for papers flying upward */
    padding-bottom: 0.5rem;
    user-select: none;
    -webkit-user-select: none;
    position: relative;
    z-index: 1;
}

.folder-wrapper.is-open {
    z-index: 100;
}

/* ── Group (hover-lift + open-lift) ── */
.folder-group {
    position: relative;
    transition: transform 0.2s ease-in;
}

.folder-group:not(.is-open):hover {
    transform: translateY(-10px);
}

.folder-group.is-open {
    transform: translateY(-5px);
}

/* ── Back plate ── */
.folder-back {
    position: relative;
    width: 150px;
    height: 120px;
    border-radius: 0 15px 15px 15px;
}

/* Tab nub */
.folder-back::before {
    content: '';
    position: absolute;
    z-index: 0;
    bottom: 100%;
    left: 0;
    width: 45px;
    height: 15px;
    border-radius: 5px 5px 0 0;
    background-color: var(--folder-back-color, #3b1db5);
}

/* ── Papers ── */
.folder-paper {
    position: absolute;
    z-index: 20;
    bottom: 10%;
    left: 50%;
    border-radius: 10px;
    transition: transform 0.3s ease-in-out;
    transform: translateX(-50%) translateY(10%);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 2px;
}

.folder-paper:nth-child(1) { width: 70%; height: 80%; background-color: #e0e0e0; }
.folder-paper:nth-child(2) { width: 80%; height: 70%; background-color: #ebebeb; }
.folder-paper:nth-child(3) { width: 90%; height: 60%; background-color: #f6f6f6; }

/* Hover — papers peek out */
.folder-group:not(.is-open):hover .folder-paper {
    transform: translateX(-50%) translateY(0%);
}

/* Open — papers fly out */
.folder-group.is-open .folder-paper:nth-child(1) { transform: translate(-120%, -70%) rotate(-15deg); }
.folder-group.is-open .folder-paper:nth-child(2) { transform: translate(10%,   -70%) rotate(15deg);  }
.folder-group.is-open .folder-paper:nth-child(3) { transform: translate(-50%,  -100%) rotate(5deg);  }

.folder-group.is-open .folder-paper:hover { scale: 1.08; }

/* ── Front flaps ── */
.folder-flap {
    position: absolute;
    z-index: 30;
    width: 100%;
    height: 100%;
    border-radius: 5px 15px 15px 15px;
    transform-origin: bottom;
    transition: transform 0.3s ease-in-out;
}

.folder-group:not(.is-open):hover .folder-flap:nth-child(4) { transform: skew(15deg)  scaleY(0.6); }
.folder-group:not(.is-open):hover .folder-flap:nth-child(5) { transform: skew(-15deg) scaleY(0.6); }
.folder-group.is-open          .folder-flap:nth-child(4) { transform: skew(15deg)  scaleY(0.6); }
.folder-group.is-open          .folder-flap:nth-child(5) { transform: skew(-15deg) scaleY(0.6); }

/* ── Skill panel — desktop: opens BELOW the folder ── */
.folder-skill-panel {
    position: absolute;
    top: calc(100% + 14px);
    left: 50%;
    transform: translateX(-50%) scaleY(0);
    transform-origin: top center;
    transition: transform 0.3s ease-in-out, opacity 0.25s ease-in-out;
    opacity: 0;
    width: 230px;
    background: var(--bg-color, #1f242d);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 12px;
    padding: 1rem;
    pointer-events: none;
    z-index: 200;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
}

.folder-group.is-open .folder-skill-panel {
    transform: translateX(-50%) scaleY(1);
    opacity: 1;
    pointer-events: auto;
}

/* ── Label under folder ── */
.folder-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--min-text-color, #969494);
    transition: color 0.2s;
    text-align: center;
    letter-spacing: 0.03em;
}

.folder-wrapper:hover .folder-label,
.folder-wrapper.is-open .folder-label {
    color: var(--text-color, #fff);
}

/* ── Desktop grid: centered both axes ── */
.folders-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    align-content: center;
    gap: 3rem 4.5rem;
    width: 100%;
    height: 100%;
    padding: 4rem 2rem 3rem;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.folders-grid::-webkit-scrollbar { display: none; }

/* ── Panel internals (shared desktop + mobile deck-panel) ── */
.folder-skill-panel .panel-img img,
.deck-panel .panel-img img {
    width: 60px;
    height: 60px;
    object-fit: contain;
    display: block;
    margin: 0 auto 0.5rem;
}

.folder-skill-panel .panel-title,
.deck-panel .panel-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-color, #fff);
    text-align: center;
    margin-bottom: 0.5rem;
}

.folder-skill-panel .panel-progress-bar,
.deck-panel .panel-progress-bar {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background-color: var(--second-bg-color, #323946);
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.folder-skill-panel .panel-progress,
.deck-panel .panel-progress {
    height: 100%;
    border-radius: 3px;
    width: 0;
    transition: width 0.5s ease-out;
    background: linear-gradient(
        270deg,
        var(--min-text-color),
        var(--main-color) 25%,
        var(--text-color) 50%,
        var(--main-color) 75%,
        var(--min-text-color) 100%
    );
    background-size: 400% 400%;
    animation: gradientProgress 5s linear infinite;
}

.folder-skill-panel .panel-desc,
.deck-panel .panel-desc {
    font-size: 0.72rem;
    color: var(--min-text-color, #969494);
    line-height: 1.5;
    max-height: 3.5em;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.folder-skill-panel .panel-desc.expanded,
.deck-panel .panel-desc.expanded {
    max-height: 200px;
}

.folder-skill-panel .panel-read-more,
.deck-panel .panel-read-more {
    background: none;
    border: none;
    outline: none;
    cursor: pointer;
    color: var(--main-color, red);
    font-size: 0.72rem;
    font-weight: 600;
    margin-top: 0.3rem;
    padding: 0;
    display: inline-block;
    font-family: inherit;
}

/* ════════════════════════════════════════════════════════════════
   MOBILE (≤ 600px) — centered card deck + panel below
   ════════════════════════════════════════════════════════════════ */
@media (max-width: 600px) {

    /* Grid becomes a flex column that centers the deck and panel */
    .folders-grid {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        align-content: center;
        gap: 1.5rem;
        padding: 1rem;
        overflow-y: auto;
        overflow-x: visible;
    }

    /* ── Deck stack container ──
       Height: folder body (88px) + room for papers flying ~90px above = 200px
       We sit the folder at the BOTTOM of this container so flying papers
       go into the space above and never clip. */
    .deck-stack {
        position: relative;
        width: 220px;
        height: 220px;   /* papers fly ~90px above folder; folder is 88px tall */
        flex-shrink: 0;
        overflow: visible;
    }

    /* Each folder-wrapper is stacked absolutely.
       top: 65% puts the folder center in the lower portion,
       leaving ~140px of overhead for the flying papers. */
    .deck-stack .folder-wrapper {
        position: absolute;
        top: 65%;
        left: 50%;
        /* base: centered on that point */
        transform: translate(-50%, -50%);
        transition: transform 0.55s cubic-bezier(0.4, 0, 0.2, 1),
                    opacity  0.45s ease;
        padding: 0;
        background: none !important;
        border: none !important;
        width: auto;
        gap: 0.5rem;
    }

    /* Deck position classes — applied by JS */
    .deck-stack .folder-wrapper.deck-pos-0 {
        z-index: 50;
        opacity: 1;
        transform: translate(-50%, -50%) rotate(0deg) scale(1);
        pointer-events: auto;
        cursor: pointer;
    }
    .deck-stack .folder-wrapper.deck-pos-1 {
        z-index: 40;
        opacity: 0.72;
        transform: translate(-50%, -50%) rotate(8deg) scale(0.96);
        pointer-events: none;
    }
    .deck-stack .folder-wrapper.deck-pos-2 {
        z-index: 30;
        opacity: 0.52;
        transform: translate(-50%, -50%) rotate(-6deg) scale(0.92);
        pointer-events: none;
    }
    .deck-stack .folder-wrapper.deck-pos-3 {
        z-index: 20;
        opacity: 0.32;
        transform: translate(-50%, -50%) rotate(5deg) scale(0.88);
        pointer-events: none;
    }
    .deck-stack .folder-wrapper.deck-pos-hidden {
        z-index: 5;
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.84);
        pointer-events: none;
    }

    /* Smaller folder on mobile */
    .deck-stack .folder-back {
        width: 110px;
        height: 88px;
    }
    .deck-stack .folder-back::before {
        width: 33px;
        height: 11px;
    }

    /* Hide embedded desktop panel & label inside the deck (deck-panel shows this) */
    .deck-stack .folder-skill-panel { display: none !important; }
    .deck-stack .folder-label       { display: none; }

    /* ── Skill info panel below the deck ── */
    .deck-panel {
        width: min(280px, 90vw);
        background: var(--bg-color, #1f242d);
        border: 1px solid rgba(255, 255, 255, 0.13);
        border-radius: 14px;
        box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: max-height 0.4s ease, opacity 0.3s ease, padding 0.35s ease;
        padding: 0 1rem;
        flex-shrink: 0;
    }

    .deck-panel.is-open {
        max-height: 400px;
        opacity: 1;
        padding: 1rem;
    }

    /* Close / shuffle-indicator row at top of deck-panel */
    .deck-panel-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 0.6rem;
    }

    .deck-panel-skill-name {
        font-size: 0.75rem;
        font-weight: 600;
        color: var(--min-text-color, #969494);
        letter-spacing: 0.06em;
        text-transform: uppercase;
    }

    .deck-panel-close {
        background: none;
        border: none;
        cursor: pointer;
        color: var(--min-text-color, #969494);
        font-size: 1.1rem;
        padding: 0;
        line-height: 1;
        font-family: inherit;
        transition: color 0.2s;
    }
    .deck-panel-close:hover { color: var(--text-color, #fff); }

    /* Shuffle dots indicator */
    .deck-dots {
        display: flex;
        gap: 6px;
        justify-content: center;
        margin-top: 0.75rem;
    }

    .deck-dot {
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: var(--second-bg-color, #323946);
        transition: background 0.3s ease, transform 0.3s ease;
    }

    .deck-dot.active {
        background: var(--main-color, red);
        transform: scale(1.25);
    }
}