/**
 * ECOIA — سوالات متداول
 * Concept: "Knowledge Hub" — جستجو + فیلتر + accordion گروه‌بندی‌شده
 *
 * ساختار:
 *   ① inner-hero + search bar
 *   ② faq-popular (chips پرتکرار)
 *   ③ faq-main (filters + accordion گروه‌بندی)
 *   ④ faq-cta
 */

/* ════════════════════════════════════════════════════════════
   ۰. GLOBALS
════════════════════════════════════════════════════════════ */

.skip-link {
    position: absolute; top: -100%; right: 0;
    z-index: var(--z-preloader, 9999);
    background: var(--gold, #C8A951); color: var(--bg-void, #070707);
    padding: 8px 18px; font-size: 13px; font-weight: 700;
    font-family: var(--font-fa, 'Vazirmatn', sans-serif); transition: top 200ms ease;
}
.skip-link:focus { top: 0; }

.faq-main.section-pad {
    padding-top: var(--section-pad, clamp(80px, 10vw, 140px));
    padding-bottom: var(--section-pad, clamp(80px, 10vw, 140px));
}

/* ════════════════════════════════════════════════════════════
   ① INNER HERO + SEARCH
════════════════════════════════════════════════════════════ */

.inner-hero {
    position: relative; width: 100%;
    min-height: clamp(54vh, 70vh, 660px);
    display: flex; align-items: flex-end;
    padding-bottom: clamp(56px, 8vw, 96px);
    overflow: hidden; background-color: var(--bg-void, #070707);
    background-size: cover; background-position: center 30%;
}
.inner-hero.faq-hero.inner-hero--has-image {
    background-image: var(--faq-hero-img, none);
    background-position: center 35%;
}
.inner-hero::before {
    content: ''; position: absolute; inset: 0; z-index: 1;
    background:
        radial-gradient(ellipse 75% 55% at 70% 80%, rgba(200,169,81,0.08) 0%, transparent 60%),
        linear-gradient(to bottom, rgba(7,7,7,0.30) 0%, rgba(7,7,7,0.72) 55%, rgba(7,7,7,0.97) 100%);
    pointer-events: none;
}
.inner-hero--has-image::before {
    background:
        radial-gradient(ellipse 60% 50% at 50% 100%, rgba(200,169,81,0.10) 0%, transparent 70%),
        linear-gradient(to bottom, rgba(7,7,7,0.20) 0%, rgba(7,7,7,0.42) 35%, rgba(7,7,7,0.84) 65%, rgba(7,7,7,0.97) 100%);
}
.inner-hero::after {
    content: ''; position: absolute; inset: 0; z-index: 2;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)'/%3E%3C/svg%3E");
    background-size: 200px 200px; opacity: 0.030; pointer-events: none; mix-blend-mode: overlay;
}
.inner-hero__accent {
    position: absolute; top: 0; right: 0; width: 420px; height: 1px; z-index: 3; opacity: 0.7;
    background: linear-gradient(270deg, var(--gold, #C8A951) 0%, rgba(200,169,81,0.3) 60%, transparent 100%);
}
.inner-hero__accent::after {
    content: ''; position: absolute; top: 20px; right: 80px; width: 200px; height: 1px;
    background: linear-gradient(270deg, rgba(200,169,81,0.25) 0%, transparent 100%);
}
.inner-hero__content {
    position: relative; z-index: 10; width: 100%;
    max-width: var(--container-max, 1280px); margin: 0 auto;
    padding: 0 var(--container-pad, 24px);
    padding-top: clamp(110px, 15vw, 170px);
}
.breadcrumb {
    display: flex; align-items: center; gap: 8px;
    margin-bottom: clamp(22px, 3.2vh, 32px);
    font-family: var(--font-fa, 'Vazirmatn', sans-serif);
    font-size: 13px; color: var(--text-secondary, #9A9590);
    position: relative; padding-bottom: 16px;
}
.breadcrumb::after {
    content: ''; position: absolute; bottom: 0; right: 0; width: 60px; height: 1px;
    background: linear-gradient(270deg, var(--gold, #C8A951), transparent); opacity: 0.5;
}
.breadcrumb a { color: var(--text-secondary); text-decoration: none; transition: color 400ms ease; }
.breadcrumb a:hover { color: var(--gold-light, #E8D5A0); }
.breadcrumb__sep { color: var(--gold); opacity: 0.5; font-size: 16px; }
.breadcrumb [aria-current="page"] { color: var(--text-primary, #F0EDE8); }

.inner-hero__title {
    font-family: var(--font-fa, 'Vazirmatn', sans-serif);
    font-size: clamp(32px, 4.2vw, 56px); font-weight: 700;
    color: var(--text-primary, #F0EDE8); line-height: 1.2;
    margin: 0 0 16px 0; letter-spacing: -0.015em;
}
.inner-hero__subtitle {
    font-family: var(--font-display, 'Cormorant Garamond', serif);
    font-size: clamp(17px, 2vw, 24px); font-style: italic;
    color: var(--gold-light, #E8D5A0); letter-spacing: 0.02em;
    margin: 0 0 clamp(32px, 4.5vh, 48px); opacity: 0.80;
}

/* ── Search Bar ── */
.faq-search {
    position:       relative;
    display:        flex;
    align-items:    center;
    max-width:      560px;
    background:     rgba(255,255,255,0.04);
    border:         1px solid rgba(200,169,81,0.22);
    border-radius:  var(--radius-md, 4px);
    padding:        4px;
    margin-bottom:  clamp(24px, 3.5vh, 36px);
    backdrop-filter: blur(8px);
    transition:     border-color 350ms ease, background 350ms ease;
}
.faq-search:focus-within {
    border-color: rgba(200,169,81,0.55);
    background:   rgba(200,169,81,0.06);
}
.faq-search__icon {
    display:         flex;
    align-items:     center;
    justify-content: center;
    width:           44px; height: 44px; flex-shrink: 0;
    color:           var(--gold, #C8A951);
    opacity:         0.65;
}
.faq-search__input {
    flex:        1;
    background:  transparent;
    border:      none;
    outline:     none;
    color:       var(--text-primary, #F0EDE8);
    font-family: var(--font-fa, 'Vazirmatn', sans-serif);
    font-size:   clamp(14px, 1.25vw, 16px);
    padding:     10px 6px;
    min-width:   0;
}
.faq-search__input::placeholder { color: rgba(154,149,144,0.55); }
.faq-search__clear {
    width:           32px; height: 32px; flex-shrink: 0;
    display:         flex; align-items: center; justify-content: center;
    background:      rgba(200,169,81,0.10);
    border:          none; border-radius: var(--radius-sm, 2px);
    color:           var(--gold-light, #E8D5A0);
    font-size:       18px; line-height: 1; cursor: pointer;
    margin-left:     4px;
    transition:      background 250ms ease;
}
.faq-search__clear:hover { background: rgba(200,169,81,0.20); }

/* mini stats */
.faq-hero-stats {
    display:     flex;
    align-items: center;
    gap:         14px;
    font-family: var(--font-fa, 'Vazirmatn', sans-serif);
    font-size:   clamp(12px, 1.05vw, 14px);
    color:       var(--text-secondary, #9A9590);
}
.faq-hero-stats__item strong {
    font-family: var(--font-body-en, 'Inter', sans-serif);
    font-weight: 800; color: var(--gold, #C8A951);
    font-size:   clamp(15px, 1.4vw, 18px);
    margin-left: 4px;
}
.faq-hero-stats__sep {
    width: 1px; height: 16px;
    background: rgba(200,169,81,0.25);
}

/* ════════════════════════════════════════════════════════════
   ② FAQ POPULAR — chips پرتکرار
════════════════════════════════════════════════════════════ */

.faq-popular {
    background: var(--bg-primary, #0A0A0A);
    padding: clamp(36px, 5.5vw, 56px) 0;
    position: relative;
}
.faq-popular::before {
    content: ''; position: absolute; top: 0;
    right: var(--container-pad, 24px); left: var(--container-pad, 24px); height: 1px;
    background: linear-gradient(90deg, transparent, rgba(200,169,81,0.18) 30%, rgba(200,169,81,0.18) 70%, transparent);
    pointer-events: none;
}
.faq-popular__label {
    display: flex; align-items: center; gap: 8px;
    font-family: var(--font-body-en, 'Inter', sans-serif);
    font-size: 11px; font-weight: 700; letter-spacing: 0.20em; text-transform: uppercase;
    color: var(--gold, #C8A951); opacity: 0.70; margin-bottom: clamp(18px, 2.5vh, 24px);
}
.faq-popular__label .icon { opacity: 0.85; }

.faq-popular__chips { display: flex; flex-wrap: wrap; gap: 10px; }

.faq-popular__chip {
    padding:        10px 18px;
    background:     var(--bg-card, #111111);
    border:         1px solid rgba(200,169,81,0.14);
    border-radius:  20px;
    font-family:    var(--font-fa, 'Vazirmatn', sans-serif);
    font-size:      clamp(12px, 1.05vw, 14px);
    color:          var(--text-secondary, #9A9590);
    cursor:         pointer;
    transition:
        border-color 300ms ease,
        background   300ms ease,
        color        300ms ease,
        transform    250ms ease;
}
.faq-popular__chip:hover {
    border-color: rgba(200,169,81,0.45);
    background:   rgba(200,169,81,0.08);
    color:        var(--gold-light, #E8D5A0);
    transform:    translateY(-2px);
}

/* ════════════════════════════════════════════════════════════
   ③ FAQ MAIN — Filters + Accordion
════════════════════════════════════════════════════════════ */

.faq-main {
    background: var(--bg-secondary, #0E0E0E); position: relative;
}

/* ── Category Filter Pills ── */
.faq-filters {
    display:       flex;
    flex-wrap:     wrap;
    gap:           10px;
    margin-bottom: clamp(40px, 5.5vh, 60px);
}

.faq-filter {
    display:        inline-flex;
    align-items:    center;
    gap:            8px;
    padding:        11px 20px;
    background:     transparent;
    border:         1px solid rgba(200,169,81,0.16);
    border-radius:  var(--radius-sm, 2px);
    font-family:    var(--font-fa, 'Vazirmatn', sans-serif);
    font-size:      clamp(13px, 1.1vw, 15px);
    font-weight:    600;
    color:          var(--text-secondary, #9A9590);
    cursor:         pointer;
    transition:
        border-color 300ms ease,
        background   300ms ease,
        color        300ms ease;
}
.faq-filter .icon { opacity: 0.55; transition: opacity 300ms ease; flex-shrink: 0; }
.faq-filter:hover {
    border-color: rgba(200,169,81,0.35);
    background:   rgba(200,169,81,0.05);
    color:        var(--text-primary, #F0EDE8);
}
.faq-filter:hover .icon { opacity: 0.85; }
.faq-filter.is-active {
    border-color: var(--gold, #C8A951);
    background:   rgba(200,169,81,0.12);
    color:        var(--gold-light, #E8D5A0);
}
.faq-filter.is-active .icon { opacity: 1; color: var(--gold, #C8A951); }

.faq-filter__count {
    display:       inline-flex;
    align-items:   center;
    justify-content: center;
    min-width:     20px; height: 20px;
    padding:       0 6px;
    border-radius: 10px;
    background:    rgba(200,169,81,0.12);
    font-family:   var(--font-body-en, 'Inter', sans-serif);
    font-size:     11px; font-weight: 700;
    color:         var(--gold, #C8A951);
    transition:    background 300ms ease;
}
.faq-filter.is-active .faq-filter__count {
    background: rgba(200,169,81,0.25);
}

/* ── No Results ── */
.faq-no-results {
    text-align: center;
    padding: clamp(60px, 8vw, 90px) 20px;
}
.faq-no-results__icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 72px; height: 72px; margin-bottom: 20px;
    border: 1px solid rgba(200,169,81,0.18); border-radius: 50%;
    background: rgba(200,169,81,0.05); color: var(--gold, #C8A951);
    opacity: 0.6;
}
.faq-no-results__title {
    font-family: var(--font-fa, 'Vazirmatn', sans-serif);
    font-size: clamp(16px, 1.6vw, 19px); font-weight: 700;
    color: var(--text-primary, #F0EDE8); margin-bottom: 8px;
}
.faq-no-results__desc {
    font-family: var(--font-fa, 'Vazirmatn', sans-serif);
    font-size: clamp(13px, 1.1vw, 14px); color: var(--text-secondary, #9A9590);
}
.faq-no-results__desc a { color: var(--gold, #C8A951); text-decoration: underline; text-underline-offset: 3px; }

/* ── FAQ Group ── */
.faq-group { margin-bottom: clamp(44px, 6vh, 64px); }
.faq-group:last-child { margin-bottom: 0; }
.faq-group.is-hidden { display: none; }

.faq-group__title {
    display:        flex;
    align-items:    center;
    gap:            10px;
    font-family:    var(--font-fa, 'Vazirmatn', sans-serif);
    font-size:      clamp(15px, 1.4vw, 18px);
    font-weight:    700;
    color:          var(--gold, #C8A951);
    margin-bottom:  clamp(18px, 2.6vh, 26px);
    letter-spacing: 0.01em;
}
.faq-group__icon {
    display: inline-flex; opacity: 0.85;
}
.faq-group__title-line {
    flex: 1; height: 1px;
    background: linear-gradient(270deg, rgba(200,169,81,0.30), transparent);
}

/* ── Accordion ── */
.faq-accordion {
    border-top: 1px solid rgba(200,169,81,0.10);
}

.faq-item {
    border-bottom: 1px solid rgba(200,169,81,0.10);
    transition:    opacity 250ms ease, max-height 250ms ease;
}
.faq-item.is-filtered-out {
    display: none;
}

.faq-item__head { margin: 0; }

.faq-item__toggle {
    width:           100%;
    display:         flex;
    align-items:     center;
    justify-content: space-between;
    gap:             16px;
    padding:         clamp(18px, 2.6vw, 24px) clamp(4px, 1vw, 8px);
    background:      transparent;
    border:          none;
    cursor:          pointer;
    text-align:      right;
    direction:       rtl;
}

.faq-item__question {
    font-family: var(--font-fa, 'Vazirmatn', sans-serif);
    font-size:   clamp(14px, 1.3vw, 16.5px);
    font-weight: 600;
    color:       var(--text-primary, #F0EDE8);
    line-height: 1.6;
    transition:  color 300ms ease;
}
.faq-item:hover .faq-item__question { color: var(--gold-light, #E8D5A0); }
.faq-item.is-open .faq-item__question { color: var(--gold, #C8A951); }

.faq-item__icon {
    flex-shrink: 0;
    display:     inline-flex;
    color:       var(--gold, #C8A951);
    opacity:     0.65;
    transform:   rotate(90deg);  /* پیش‌فرض: رو به پایین */
    transition:  transform 350ms cubic-bezier(0.16, 1, 0.3, 1), opacity 300ms ease;
}
.faq-item:hover .faq-item__icon { opacity: 1; }
.faq-item.is-open .faq-item__icon {
    transform: rotate(-90deg);  /* باز: رو به بالا */
    opacity:   1;
}

/* پنل پاسخ — max-height transition */
.faq-item__panel {
    max-height: 0;
    overflow:   hidden;
    transition: max-height 420ms cubic-bezier(0.16, 1, 0.3, 1);
}

.faq-item__answer {
    padding: 0 clamp(4px, 1vw, 8px) clamp(20px, 3vw, 28px);
}
.faq-item__answer p {
    font-family: var(--font-fa, 'Vazirmatn', sans-serif);
    font-size:   clamp(13px, 1.15vw, 15px);
    color:       var(--text-secondary, #9A9590);
    line-height: 1.95;
    margin:      0;
    max-width:   720px;
}

/* ════════════════════════════════════════════════════════════
   ④ FAQ CTA
════════════════════════════════════════════════════════════ */

.faq-cta {
    background: var(--bg-void, #070707);
    padding: clamp(80px, 11vw, 132px) 0;
    position: relative; overflow: hidden;
}
.faq-cta__grain {
    position: absolute; inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)'/%3E%3C/svg%3E");
    background-size: 180px 180px; opacity: 0.022; pointer-events: none; mix-blend-mode: overlay;
}
.faq-cta::before {
    content: ''; position: absolute; top: 50%; right: 35%; transform: translateY(-50%);
    width: 480px; height: 480px; border-radius: 50%;
    background: radial-gradient(circle, rgba(200,169,81,0.07) 0%, transparent 65%); pointer-events: none;
}
.faq-cta::after {
    content: ''; position: absolute; top: 0;
    right: var(--container-pad, 24px); left: var(--container-pad, 24px); height: 1px;
    background: linear-gradient(90deg, transparent, rgba(200,169,81,0.22) 30%, rgba(200,169,81,0.22) 70%, transparent);
    pointer-events: none;
}

.faq-cta__inner {
    display: grid; grid-template-columns: 1.2fr 1fr;
    gap: clamp(48px, 7vw, 96px); align-items: center;
    position: relative; z-index: 1;
}

.faq-cta__eyebrow {
    font-family: var(--font-body-en, 'Inter', sans-serif);
    font-size: 11px; font-weight: 600; letter-spacing: 0.25em; text-transform: uppercase;
    color: var(--gold, #C8A951); margin-bottom: clamp(16px, 2.5vh, 24px); display: block;
}
.faq-cta__title {
    font-family: var(--font-fa, 'Vazirmatn', sans-serif);
    font-size: clamp(28px, 3.6vw, 48px); font-weight: 700;
    color: var(--text-primary, #F0EDE8); line-height: 1.25;
    margin-bottom: clamp(16px, 2.5vh, 24px); letter-spacing: -0.015em;
}
.faq-cta__title-em { font-style: normal; color: var(--gold, #C8A951); }
.faq-cta__sub {
    font-family: var(--font-fa, 'Vazirmatn', sans-serif);
    font-size: clamp(13px, 1.2vw, 16px); color: var(--text-secondary, #9A9590);
    line-height: 2; margin-bottom: clamp(28px, 4vh, 40px); max-width: 420px;
}

/* mini channels */
.faq-cta__channels {
    display: flex; flex-direction: column; gap: 12px;
}
.faq-mini-ch {
    display:         flex;
    align-items:     center;
    gap:             14px;
    padding:         clamp(16px, 2.2vw, 20px) clamp(18px, 2.5vw, 24px);
    background:      var(--bg-card, #111111);
    border:          1px solid rgba(200,169,81,0.10);
    border-radius:   var(--radius-md, 4px);
    text-decoration: none;
    transition:      border-color 350ms ease, background 350ms ease;
}
.faq-mini-ch:hover { border-color: rgba(200,169,81,0.30); background: var(--bg-card-hover, #161616); }
.faq-mini-ch__icon {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; flex-shrink: 0;
    border: 1px solid rgba(200,169,81,0.16); border-radius: var(--radius-sm, 2px);
    background: rgba(200,169,81,0.05); color: var(--gold, #C8A951);
}
.faq-mini-ch__text {
    flex: 1; display: flex; flex-direction: column; gap: 2px;
    font-family: var(--font-fa, 'Vazirmatn', sans-serif);
    font-size: clamp(12px, 1.05vw, 13.5px); color: var(--text-secondary, #9A9590);
}
.faq-mini-ch__text strong {
    font-size: clamp(13px, 1.15vw, 15px); color: var(--text-primary, #F0EDE8); font-weight: 700;
}
.faq-mini-ch > .icon { flex-shrink: 0; color: var(--gold, #C8A951); opacity: 0.6; }

/* دکمه */
.btn--gold {
    background: var(--gold, #C8A951); color: var(--bg-void, #070707);
    border: 1px solid var(--gold, #C8A951); font-weight: 700;
    transition: background 400ms ease, box-shadow 400ms ease, transform 300ms ease;
}
.btn--gold:hover { background: var(--gold-bright, #F0E0A8); box-shadow: 0 0 32px rgba(200,169,81,0.45); transform: translateY(-2px); }
.btn--lg { padding: 14px 28px; font-size: var(--fs-body, 15px); gap: 10px; }

/* ════════════════════════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════════════════════ */

@media (max-width: 1024px) {
    .faq-main.section-pad {
        padding-top: clamp(56px, 8vw, 80px); padding-bottom: clamp(56px, 8vw, 80px);
    }
    .faq-cta__inner { grid-template-columns: 1fr; gap: clamp(36px, 5vh, 52px); }
}

@media (max-width: 768px) {
    .inner-hero { min-height: 56vh; padding-bottom: clamp(44px, 7vw, 72px); }
    .inner-hero__title { font-size: clamp(28px, 6.5vw, 40px); }
    .faq-search { max-width: 100%; }
    .faq-hero-stats { flex-wrap: wrap; gap: 10px; }

    .faq-filters { gap: 8px; }
    .faq-filter  { padding: 9px 14px; font-size: 12.5px; }

    .faq-item__toggle  { padding: clamp(16px, 3vw, 20px) 2px; gap: 12px; }
    .faq-item__question{ font-size: 13.5px; }

    .faq-cta__title { font-size: clamp(24px, 6.5vw, 34px); }
}

@media (max-width: 480px) {
    .breadcrumb { font-size: 11px; }
    .faq-popular__chip { font-size: 12px; padding: 8px 14px; }
    .faq-filter .icon  { display: none; }
    .faq-item__answer p { font-size: 13px; }
}