/* FILE PURPOSE: SHARED FOOTER STYLES FOR THE OAKOKHO SUBDOMAINS.
                 THE "SHARED" SECTION BELOW IS BYTE-IDENTICAL ACROSS
                 learn, school, books AND swargam — COPY THAT SECTION
                 AS-IS. THE PER-SUBDOMAIN OVERRIDE SECTION AT THE
                 BOTTOM IS DELIBERATELY *NOT* IDENTICAL: EACH SITE
                 KEEPS ITS OWN TAIL. SEE THE NOTE ON LITERAL COLOURS.
   LOCATION: /var/www/books/css/footer.css
   LAST REVIEWED: 2026-08-20 */

/* ============================================================
   SHARED — DO NOT EDIT PER-SUBDOMAIN

   COLOURS ARE DELIBERATELY LITERAL, NOT var() TOKENS. swargam's
   style.css defines --dark-bg/--white/--transition; learn's does
   NOT. A var() that resolves nowhere makes the whole declaration
   compute to its initial value, so `background: var(--dark-bg)`
   would render learn's footer TRANSPARENT — white text on white.
   The literals below are the values both sites already computed.
   ============================================================ */

.main-footer {
    background: #1e293b;
    color: #ffffff;
    padding: 40px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

/* ALL FOOTER HEADINGS — BASE. color/font-weight ARE STATED EXPLICITLY EVEN
   THOUGH THEY MATCH WHAT h3 WOULD INHERIT/DEFAULT TO, SO THE COLUMN HEADINGS
   DO NOT SILENTLY CHANGE IF A SITE RESTYLES h3 GLOBALLY. */
.footer-section h3 {
    color: #ffffff;
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

/* ASSAMESE HEADING — FIRST COLUMN ONLY. THIS IS WHAT RENDERS THE SITE NAME IN
   NOTO SERIF BENGALI INSTEAD OF THE SYSTEM SANS STACK THAT header.css ASSIGNS
   TO .main-footer. DO NOT PUT .footer-as ON THE <h3> — THAT CLASS IS 15px AND
   WOULD SHRINK THE HEADING RATHER THAN ENLARGE IT. */
.footer-section:first-child h3 {
    font-family: 'Noto Serif Bengali', serif;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a,
.footer-section ul li {
    color: #ffffff;
    text-decoration: none;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.footer-section ul li a:hover {
    opacity: 1;
    padding-left: 5px;
}

/* FOOTER LINK ICONS — FIXED WIDTH SO EVERY LABEL STARTS AT THE SAME INDENT.
   COVERS BOTH THE LINKED COLUMNS (QUICK LINKS / OAKOKHO PROJECTS, WHERE THE
   <i> SITS INSIDE THE <a>) AND THE PLAIN CONTACT COLUMN (WHERE IT SITS
   DIRECTLY IN THE <li>). ANY MORE-SPECIFIC PER-SITE RULE THAT ALSO SETS width
   ON THESE ICONS WILL SILENTLY OVERRIDE THE 1.2em — KEEP SPACING/TONE ONLY IN
   THOSE RULES, NEVER width/display/text-align. */
.footer-section ul li a i,
.footer-section ul li i {
    display: inline-block;
    width: 1.2em;
    text-align: center;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #6366f1;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

/* ASSAMESE SUBHEADING / TAGLINE — THE <p class="footer-as"> IN COLUMN 1. */
.footer-as {
    font-family: 'Noto Serif Bengali', serif;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.6;
    margin-bottom: 4px;
}

/* ============================================================
   BOOKS OVERRIDES
   EVERYTHING BELOW THIS LINE IS BOOKS-ONLY. DO NOT COPY IT TO
   ANOTHER SUBDOMAIN — EACH SITE WRITES ITS OWN TAIL.
   ============================================================ */

/* FOUR-COLUMN FOOTER: TIGHTER TRACK MINIMUM THAN THE SHARED 250px SO ALL FOUR
   COLUMNS SURVIVE ON ONE ROW AT DESKTOP WIDTHS. BOOKS HAS THE SAME FOUR-COLUMN
   LAYOUT AS SWARGAM, SO IT NEEDS THE SAME TIGHTER TRACK. */
.main-footer .footer-content {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

/* BOOKS COL-1 ENGLISH TAGLINE — SMALLER THAN
   THE ASSAMESE LINE ABOVE IT.
   THE :not() PAIR IS WHAT KEEPS THIS OFF THE TWO SIBLING <p>s IN THE SAME
   COLUMN: .footer-as MUST STAY AT THE SHARED 15px, AND .footer-hits HAS ITS
   OWN SIZE BELOW. WITHOUT THE :not()s THIS (0,1,1) RULE WOULD OUTRANK BARE
   .footer-as (0,1,0) AND SHRINK THE ASSAMESE LINE TOO. */
.footer-section p:not(.footer-as):not(.footer-hits) {
    font-size: 0.82rem;
    opacity: 0.8;
    line-height: 1.6;
}

/* SITE HIT COUNTER — A <p> IN THE FIRST COLUMN. IT IS EXCLUDED FROM THE RULE
   ABOVE BY :not(.footer-hits), SO WITHOUT THIS BLOCK IT WOULD FALL BACK TO THE
   1rem FULL-OPACITY BODY DEFAULT AND READ LARGER THAN THE TAGLINES AROUND IT.
   0.85rem MATCHES SWARGAM'S #siteHitCounter — BIG ENOUGH FOR A NUMBER TO STAY
   LEGIBLE, WHICH THE 0.82rem TAGLINE SIZE IS NOT. */
.footer-hits {
    margin-top: 1rem;
    font-size: 0.85rem;
    opacity: 0.9;
    line-height: 1.6;
    white-space: nowrap;
}

/* SPACING/TONE ONLY — width/display/text-align DELIBERATELY OMITTED. THIS
   SELECTOR (0,2,2) IS MORE SPECIFIC THAN THE SHARED ICON RULE, SO RE-ADDING
   width HERE WOULD SILENTLY OVERRIDE THE SHARED 1.2em ALIGNMENT. */
.main-footer .footer-section ul li i {
    margin-right: 0.5rem;
    opacity: 0.7;
}

/* ============================================================
   SCROLL TO TOP BUTTON — BOOKS VARIANT.

   THE BASE BLOCK IS REQUIRED HERE. THE EQUIVALENT RULES USED TO LIVE IN
   css/style.css (56px GRADIENT VARIANT) AND WERE REMOVED IN THE SAME CHANGE
   THAT ADDED THIS FILE — WITHOUT position/background/opacity/visibility AND
   THE .show TOGGLE THE BUTTON WOULD RENDER INLINE IN THE PAGE FLOW AND STAY
   PERMANENTLY VISIBLE. THE BOOKS SIZE/INSET OVERRIDES FOLLOW IT.
   ============================================================ */
#scrollToTopBtn {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 999;
    width: 46px;
    height: 46px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--white);
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.25);
    /* HIDDEN BY DEFAULT. THE scrollY > 300 JS IN footer.php TOGGLES .show —
       visibility (not display) SO THE FADE/SLIDE TRANSITION CAN RUN, AND SO THE
       BUTTON ISN'T CLICKABLE WHILE HIDDEN. */
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease, background-color 0.2s ease;
}

/* BOOKS SCROLL-TO-TOP — MATCHES LEARN PATTERN
   (46px, flat colour, safe-area insets) */
#scrollToTopBtn {
    width: 46px !important;
    height: 46px !important;
    min-width: 0 !important;
    max-width: 46px !important;
    bottom: calc(24px + env(safe-area-inset-bottom, 0px));
    right: calc(24px + env(safe-area-inset-right, 0px));
    border-radius: 50% !important;
    padding: 0 !important;
    flex: none !important;
}

#scrollToTopBtn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#scrollToTopBtn:hover {
    background: #4f46e5;
}