/* =============================================================================
   SAOIF Skill Language Switcher Stylesheet
   language.css
   Copyright (C) 2020 MINEVERSAL
   ============================================================================= */

/* ── Container ─────────────────────────────────────────────────────────────── */
#lang-switcher {
    position: fixed;
    bottom: 24px;
    right: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 9999;
}

/* ── Language button list ───────────────────────────────────────────────────── */
.lang-options {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    /* no overflow:hidden — let the scale/translate do the hiding */
}

/* Each flag button — closed state (hidden by default) */
.lang-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.22);
    border: 2px solid transparent;
    text-decoration: none !important;
    overflow: hidden;

    /* closed state */
    opacity: 0;
    transform: translateY(12px) scale(0.65);
    pointer-events: none;

    /* base transition (used for closing) */
    transition: opacity     0.20s ease,
                transform   0.20s ease,
                border-color 0.15s ease,
                box-shadow  0.15s ease;
}

/* ── Stagger on CLOSE — top buttons disappear first ────────────────────────── */
#lang-switcher:not(.open) .lang-options .lang-btn:nth-child(1) { transition-delay: 0.00s; }
#lang-switcher:not(.open) .lang-options .lang-btn:nth-child(2) { transition-delay: 0.05s; }
#lang-switcher:not(.open) .lang-options .lang-btn:nth-child(3) { transition-delay: 0.10s; }
#lang-switcher:not(.open) .lang-options .lang-btn:nth-child(4) { transition-delay: 0.14s; }

/* ── Stagger on OPEN — bottom buttons appear first (cascade upward) ─────────── */
#lang-switcher.open .lang-options .lang-btn:nth-child(4) { transition-delay: 0.04s; }
#lang-switcher.open .lang-options .lang-btn:nth-child(3) { transition-delay: 0.10s; }
#lang-switcher.open .lang-options .lang-btn:nth-child(2) { transition-delay: 0.16s; }
#lang-switcher.open .lang-options .lang-btn:nth-child(1) { transition-delay: 0.22s; }

/* Open state */
#lang-switcher.open .lang-btn {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

/* Hover (only effective when open / pointer-events: auto) */
.lang-btn:hover {
    transform: translateY(0) scale(1.13) !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.30);
}

/* Flag image */
.lang-btn img {
    width: 28px;
    height: 28px;
    object-fit: cover;
    border-radius: 50%;
    border-top-left-radius:  50% !important;
    border-top-right-radius: 50% !important;
}

/* Active language highlight */
.lang-btn.active {
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.30);
}

/* ── Toggle button ──────────────────────────────────────────────────────────── */
.lang-toggle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #1a73e8;
    border: none;
    cursor: pointer;
    box-shadow: 0 3px 16px rgba(26, 115, 232, 0.50);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: background 0.22s ease,
                transform  0.18s ease,
                box-shadow 0.22s ease;
    outline: none;
    -webkit-tap-highlight-color: transparent;
    flex-shrink: 0;
}

.lang-toggle:hover {
    background: #1558b0;
    transform: scale(1.08);
    box-shadow: 0 5px 20px rgba(26, 115, 232, 0.60);
}

.lang-toggle:active {
    transform: scale(0.93);
}

/* Opened state — turn red to signal "close" */
#lang-switcher.open .lang-toggle {
    background: #e53935;
    box-shadow: 0 3px 16px rgba(229, 57, 53, 0.50);
}

#lang-switcher.open .lang-toggle:hover {
    background: #b71c1c;
    box-shadow: 0 5px 20px rgba(229, 57, 53, 0.60);
}

/* ── Icons inside the toggle ────────────────────────────────────────────────── */
.lang-toggle .icon-translate,
.lang-toggle .icon-close {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity   0.20s ease,
                transform 0.20s ease;
    pointer-events: none;
}

/* Default: translate visible */
.lang-toggle .icon-translate {
    opacity: 1;
    transform: rotate(0deg) scale(1);
    color: #fff;
}

/* Default: X hidden */
.lang-toggle .icon-close {
    opacity: 0;
    transform: rotate(-70deg) scale(0.55);
    color: #fff;
    font-size: 26px;
    font-weight: 200;
    line-height: 1;
    font-family: system-ui, sans-serif;
}

/* Open: swap icons */
#lang-switcher.open .lang-toggle .icon-translate {
    opacity: 0;
    transform: rotate(70deg) scale(0.55);
}

#lang-switcher.open .lang-toggle .icon-close {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}