/* ==========================================================================
   Lazy Tabs – Default Stylesheet
   BEM naming · CSS custom properties · Light only · Modern Pill Buttons
   ========================================================================== */

/* ── Design Tokens ──────────────────────────────────────────────────────── */
:root {
    --lt-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
        Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
    --lt-font-size: 15px;
    --lt-radius: 10px;
    --lt-radius-btn: 50px;
    --lt-gap: 8px;
    --lt-transition: 0.22s ease;

    /* Colors */
    --lt-panel-bg: #ffffff;
    --lt-border: #e2e5e9;
    --lt-nav-bg: #f4f6f8;
    --lt-btn-bg: #ffffff;
    --lt-btn-color: #4b5563;
    --lt-btn-border: #d1d5db;
    --lt-btn-hover-bg: #eef2ff;
    --lt-btn-hover-color: #2563eb;
    --lt-btn-hover-border: #a5b4fc;
    --lt-btn-active-bg: #2563eb;
    --lt-btn-active-color: #ffffff;
    --lt-btn-active-border: #2563eb;
    --lt-btn-active-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
    --lt-focus-ring: rgba(37, 99, 235, 0.35);
    --lt-loader-color: #2563eb;
    --lt-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* ── Container ──────────────────────────────────────────────────────────── */
.lazy-tabs {
    font-family: var(--lt-font-family);
    font-size: var(--lt-font-size);
    line-height: 1.6;
    border-radius: var(--lt-radius);
    overflow: visible;
    max-width: 100%;
}

/* ── Tab Navigation ─────────────────────────────────────────────────────── */
.lazy-tabs__nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--lt-gap);
    padding: 12px 4px;
    justify-content: center;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
    scrollbar-width: none;
}

.lazy-tabs__nav::-webkit-scrollbar {
    display: none;
}

/* ── Tab Buttons (Pill / Modern Button Style) ───────────────────────────── */
.lazy-tabs__btn {
    flex: 0 0 auto;
    padding: 10px 24px;
    border: 1.5px solid var(--lt-btn-border);
    background: var(--lt-btn-bg);
    color: var(--lt-btn-color);
    font-family: inherit;
    font-size: inherit;
    font-weight: 500;
    letter-spacing: 0.01em;
    cursor: pointer;
    white-space: nowrap;
    border-radius: var(--lt-radius-btn);
    transition: background var(--lt-transition),
        color var(--lt-transition),
        border-color var(--lt-transition),
        box-shadow var(--lt-transition),
        transform var(--lt-transition);
    position: relative;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.lazy-tabs__btn:hover {
    background: var(--lt-btn-hover-bg);
    color: var(--lt-btn-hover-color);
    border-color: var(--lt-btn-hover-border);
    transform: translateY(-1px);
}

.lazy-tabs__btn:active {
    transform: translateY(0);
}

.lazy-tabs__btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--lt-focus-ring);
    z-index: 1;
}

.lazy-tabs__btn[aria-selected="true"] {
    background: var(--lt-btn-active-bg);
    color: var(--lt-btn-active-color);
    border-color: var(--lt-btn-active-border);
    font-weight: 600;
    box-shadow: var(--lt-btn-active-shadow);
}

.lazy-tabs__btn[aria-selected="true"]:hover {
    background: #1d4ed8;
    border-color: #1d4ed8;
    color: #ffffff;
}

/* ── Tab Panels ─────────────────────────────────────────────────────────── */
.lazy-tabs__panel {
    padding: 24px 4px;
    background: var(--lt-panel-bg);
    min-height: 80px;
    position: relative;
    animation: lt-fadeIn 0.25s ease;
}

.lazy-tabs__panel[hidden] {
    display: none;
}

@keyframes lt-fadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Ensure embeds & iframes scale */
.lazy-tabs__panel iframe,
.lazy-tabs__panel video,
.lazy-tabs__panel embed,
.lazy-tabs__panel object {
    max-width: 100%;
}

/* Loading indicator */
.lazy-tabs__panel--loading {
    min-height: 120px;
}

.lazy-tabs__panel--loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    margin: -15px 0 0 -15px;
    border: 3px solid var(--lt-border);
    border-top-color: var(--lt-loader-color);
    border-radius: 50%;
    animation: lt-spin 0.65s linear infinite;
}

@keyframes lt-spin {
    to {
        transform: rotate(360deg);
    }
}

/* ==========================================================================
   Responsive – Tablet (≤ 768px)
   ========================================================================== */
@media (max-width: 768px) {
    .lazy-tabs__nav {
        padding: 10px 4px;
        gap: 6px;
    }

    .lazy-tabs__btn {
        padding: 9px 18px;
        font-size: 14px;
    }

    .lazy-tabs__panel {
        padding: 18px 2px;
    }
}

/* ==========================================================================
   Responsive – Mobile (≤ 480px)
   ========================================================================== */
@media (max-width: 480px) {
    :root {
        --lt-font-size: 14px;
    }

    .lazy-tabs {
        border-radius: 0;
    }

    .lazy-tabs__nav {
        flex-wrap: nowrap;
        justify-content: start;
        padding: 8px 8px;
        gap: 6px;
        /* Scroll hint: subtle gradient on edges */
        -webkit-mask-image: linear-gradient(to right,
                transparent 0,
                #000 12px,
                #000 calc(100% - 12px),
                transparent 100%);
        mask-image: linear-gradient(to right,
                transparent 0,
                #000 12px,
                #000 calc(100% - 12px),
                transparent 100%);
    }

    .lazy-tabs__btn {
        padding: 8px 16px;
        font-size: 13px;
    }

    .lazy-tabs__panel {
        padding: 14px 4px;
        min-height: 60px;
    }

    .lazy-tabs__panel--loading {
        min-height: 80px;
    }
}

/* ==========================================================================
   Print
   ========================================================================== */
@media print {
    .lazy-tabs__nav {
        break-inside: avoid;
    }

    .lazy-tabs__panel[hidden] {
        display: block !important;
        border-top: 1px solid #ccc;
    }

    .lazy-tabs__panel--loading::after {
        display: none;
    }
}