/* ============================================================
   5D Framework Plugin — v2.0 Professional Design
   ============================================================ */

/* ── Reset & Box Model ────────────────────────────────────── */
.fdf-wrap *,
.fdf-wrap *::before,
.fdf-wrap *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Wrapper ──────────────────────────────────────────────── */
.fdf-wrap {
    --c-bg:           #f0f2f7;
    --c-card:         #ffffff;
    --c-border:       #dde2ef;
    --c-border-light: #eaecf5;
    --c-text-head:    #111827;
    --c-text-body:    #374151;
    --c-text-sub:     #6b7280;
    --c-accent:       #1e9e74;          /* green active */
    --c-accent-blue:  #2563eb;          /* blue last step */
    --c-step-idle:    #f8f9fc;
    --c-step-active:  #0f172a;          /* dark active */
    --c-step-deliver: #eff6ff;
    --c-num-idle:     #9ca3af;
    --c-num-active:   #ffffff;
    --c-arrow:        #c4cad9;
    --c-shadow:       rgba(15,23,42,.08);
    --radius:         14px;
    --radius-sm:      10px;
    --transition:     0.35s cubic-bezier(.4,0,.2,1);

    background: var(--c-bg);
    border-radius: var(--radius);
    padding: 28px 28px 28px;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

/* ── Title Card ───────────────────────────────────────────── */
.fdf-title-card {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    padding: 18px 22px;
    margin-bottom: 18px;
    box-shadow: 0 1px 4px var(--c-shadow);
}

.fdf-title {
    font-size: clamp(14px, 2.2vw, 18px);
    font-weight: 700;
    color: var(--c-text-head);
    line-height: 1.4;
    letter-spacing: -0.025em;
}

/* ── Tabs Row (Desktop) ───────────────────────────────────── */
.fdf-tabs {
    display: flex;
    align-items: stretch;
    gap: 0;
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    margin-bottom: 4px;
    box-shadow: 0 1px 4px var(--c-shadow);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.fdf-tabs::-webkit-scrollbar { display: none; }

/* ── Tab Button ───────────────────────────────────────────── */
.fdf-tab {
    flex: 1;
    min-width: 110px;
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--c-step-idle);
    border: 1.5px solid var(--c-border-light);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
    font-family: inherit;
    position: relative;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

.fdf-tab:hover:not(.fdf-tab--active) {
    border-color: var(--c-accent);
    background: #f0fdf8;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(30, 158, 116, .15);
}

.fdf-tab:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 2px;
}

/* Active tab — dark */
.fdf-tab--active {
    background: var(--c-step-active);
    border-color: var(--c-step-active);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(15, 23, 42, .28);
}

/* Last tab (Deliver) idle */
.fdf-tab[data-index="4"] {
    background: var(--c-step-deliver);
    border-color: #bfdbfe;
}
.fdf-tab[data-index="4"]:hover:not(.fdf-tab--active) {
    border-color: var(--c-accent-blue);
    background: #dbeafe;
    box-shadow: 0 4px 12px rgba(37,99,235,.15);
}
.fdf-tab[data-index="4"].fdf-tab--active {
    background: var(--c-accent-blue);
    border-color: var(--c-accent-blue);
    box-shadow: 0 8px 20px rgba(37,99,235,.3);
}

/* ── Tab Number Bubble ────────────────────────────────────── */
.fdf-tab__num {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: rgba(107,114,128,.12);
    color: var(--c-num-idle);
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition);
    font-family: 'Inter', sans-serif;
}

.fdf-tab--active .fdf-tab__num {
    background: rgba(255,255,255,.18);
    color: var(--c-num-active);
}

/* ── Tab Label ────────────────────────────────────────────── */
.fdf-tab__label {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.fdf-tab__label strong {
    display: block;
    font-size: clamp(12px, 1.4vw, 14px);
    font-weight: 700;
    color: var(--c-text-head);
    line-height: 1.2;
    letter-spacing: -0.015em;
    transition: color var(--transition);
}

.fdf-tab__label em {
    display: block;
    font-size: clamp(10px, 1.1vw, 11px);
    font-style: italic;
    color: var(--c-text-sub);
    line-height: 1.3;
    transition: color var(--transition);
}

.fdf-tab--active .fdf-tab__label strong,
.fdf-tab--active .fdf-tab__label em {
    color: rgba(255,255,255,.95);
}

/* ── Chevron Between Tabs ─────────────────────────────────── */
.fdf-tab__arrow {
    color: var(--c-arrow);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    padding: 0 2px;
}

/* ── Description Panel Area ───────────────────────────────── */
.fdf-panels {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    margin-top: 4px;
    min-height: 120px;
    overflow: hidden;
    box-shadow: 0 1px 4px var(--c-shadow);
    position: relative;
}

/* ── Single Panel ─────────────────────────────────────────── */
.fdf-panel {
    display: none;
    padding: 24px 26px 22px;
    animation: fdfSlideIn var(--transition) forwards;
}

.fdf-panel--active { display: block; }

@keyframes fdfSlideIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.fdf-panel__heading {
    font-size: clamp(15px, 2vw, 18px);
    font-weight: 700;
    color: var(--c-text-head);
    line-height: 1.35;
    letter-spacing: -0.025em;
    margin-bottom: 10px;
}

.fdf-panel__sep {
    color: var(--c-text-sub);
    font-weight: 400;
    margin: 0 4px;
}

.fdf-panel__sub {
    font-weight: 400;
    color: var(--c-text-sub);
}

.fdf-panel__text {
    font-size: clamp(13px, 1.6vw, 15px);
    color: var(--c-text-body);
    line-height: 1.7;
    max-width: 840px;
}

/* ============================================================
   MOBILE — Pure Slider (≤ 767px)
   ============================================================ */
@media (max-width: 767px) {

    .fdf-wrap {
        padding: 16px 14px;
        background: var(--c-bg);
        border-radius: var(--radius-sm);
    }

    .fdf-title-card {
        padding: 14px 16px;
        margin-bottom: 14px;
    }

    /* Hide desktop tab row on mobile */
    .fdf-tabs {
        display: none;
    }

    /* Panels become full-width swipeable slider */
    .fdf-panels {
        position: relative;
        overflow: hidden;
        min-height: 0;
        border-radius: var(--radius-sm);
    }

    /* All panels absolute positioned for slide effect */
    .fdf-panel {
        display: block;
        position: absolute;
        top: 0; left: 0;
        width: 100%;
        transform: translateX(100%);
        transition: transform var(--transition);
        padding: 20px 18px 20px;
        opacity: 1;
        animation: none;
    }

    .fdf-panel--active {
        position: relative;
        transform: translateX(0);
    }

    /* Mobile: slide from left for prev, right for next handled in JS */
    .fdf-panel--exit-left  { transform: translateX(-100%); }
    .fdf-panel--exit-right { transform: translateX(100%); }

    /* Mobile Step Indicator at top */
    .fdf-mobile-nav {
        display: flex !important;
        align-items: center;
        justify-content: space-between;
        background: var(--c-card);
        border: 1px solid var(--c-border);
        border-radius: var(--radius-sm);
        padding: 10px 14px;
        margin-bottom: 4px;
        box-shadow: 0 1px 4px var(--c-shadow);
    }

    .fdf-mobile-nav__prev,
    .fdf-mobile-nav__next {
        width: 36px;
        height: 36px;
        border-radius: 8px;
        border: 1.5px solid var(--c-border);
        background: var(--c-step-idle);
        color: var(--c-text-body);
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        flex-shrink: 0;
        transition: all 0.2s ease;
        -webkit-tap-highlight-color: transparent;
    }

    .fdf-mobile-nav__prev:hover,
    .fdf-mobile-nav__next:hover {
        background: var(--c-step-active);
        border-color: var(--c-step-active);
        color: #fff;
    }

    .fdf-mobile-nav__prev:disabled,
    .fdf-mobile-nav__next:disabled {
        opacity: 0.35;
        cursor: default;
    }

    .fdf-mobile-nav__info {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 2px;
    }

    .fdf-mobile-nav__label {
        font-size: 15px;
        font-weight: 700;
        color: var(--c-text-head);
        letter-spacing: -0.02em;
    }

    .fdf-mobile-nav__sub {
        font-size: 11px;
        color: var(--c-text-sub);
        font-style: italic;
    }

    .fdf-mobile-nav__count {
        font-size: 11px;
        color: var(--c-text-sub);
        font-weight: 600;
    }
}

/* ── Ensure mobile nav hidden on desktop ─────────────────── */
.fdf-mobile-nav {
    display: none;
}

/* ── Dark Theme Override ──────────────────────────────────── */
.fdf-wrap.fdf-theme-dark {
    --c-bg:           #141927;
    --c-card:         #1e2537;
    --c-border:       #2d3654;
    --c-border-light: #2a3251;
    --c-text-head:    #f1f5f9;
    --c-text-body:    #94a3b8;
    --c-text-sub:     #64748b;
    --c-step-idle:    #242d45;
    --c-step-active:  #4CAF91;
    --c-arrow:        #2d3654;
    --c-shadow:       rgba(0,0,0,.3);
    --c-num-idle:     #4a5568;
}

.fdf-wrap.fdf-theme-dark .fdf-tab--active .fdf-tab__label strong,
.fdf-wrap.fdf-theme-dark .fdf-tab--active .fdf-tab__label em {
    color: #fff;
}