/* ============================================================================
   MAHJONG SOLITARIO (SHANGHAI) - Stile Grafico & Layout 1024x750
   lucianomanenti.com
   ============================================================================ */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    overflow: hidden;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #1a5f2a;
    color: #ffffff;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.main-container {
    position: relative;
    width: 100%;
    height: 100%;
}

/* === SIDEBARS (per AdSense, Amazon e layout engine) === */
.sidebar {
    position: absolute;
    top: 0;
    height: 100%;
    background: linear-gradient(135deg, #1a6b30 0%, #145524 50%, #0f4a1c 100%);
    overflow-y: auto;
    box-sizing: border-box;
    display: none;
    flex-direction: column;
    align-items: center;
    z-index: 1;
    transition: opacity 0.3s ease;
}
#sidebar-left { left: 0; }
#sidebar-right { right: 0; }

/* ================= CAMPO DI GIOCO 1024 x 750 ================= */
#campogioco {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1024px;
    height: 750px;
    transform-origin: center center;
    background: linear-gradient(135deg, #1a6b30 0%, #145524 50%, #0f4a1c 100%);
    background-image: url(images/scala40/tappetoverde.png);
    border: 4px solid #b8860b;
    border-radius: 10px;
    box-shadow: inset 0 0 100px rgba(0, 0, 0, 0.4), 0 10px 30px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

/* ================= HEADER BAR SUPERIORE ================= */
#header-mahjong {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: linear-gradient(180deg, rgba(10, 30, 20, 0.95) 0%, rgba(10, 30, 20, 0.75) 100%);
    border-bottom: 2px solid #b8860b;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 10px;
    z-index: 50;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    box-sizing: border-box;
}

.header-left, .header-center, .header-right {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

#titolo-gioco {
    font-size: 17px;
    font-weight: bold;
    color: #ffd700;
    text-shadow: 1px 2px 4px #000, 0 0 10px rgba(255, 215, 0, 0.4);
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

#titolo-gioco span.badge-schema {
    font-size: 10px;
    font-weight: 600;
    background: rgba(184, 134, 11, 0.35);
    border: 1px solid #ffd700;
    color: #fff;
    padding: 2px 6px;
    border-radius: 8px;
    text-shadow: none;
    letter-spacing: 0;
    white-space: nowrap;
}

/* Indicatori Info (Tempo, Tessere, Coppie, Punti) */
.info-pill {
    background: rgba(0, 0, 0, 0.55);
    border: 1px solid rgba(255, 215, 0, 0.35);
    border-radius: 6px;
    padding: 3px 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 54px;
    box-sizing: border-box;
}

.info-pill-lbl {
    font-size: 9px;
    text-transform: uppercase;
    color: #9eccaa;
    font-weight: 600;
    letter-spacing: 0.5px;
    line-height: 1;
    margin-bottom: 2px;
}

.info-pill-val {
    font-size: 14px;
    font-weight: bold;
    color: #ffffff;
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.info-pill-val.gold {
    color: #ffd700;
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.5);
}

/* Pulsanti Barra Superiore */
.btn-azione-top {
    background: linear-gradient(180deg, #2b6a4b 0%, #17422c 100%);
    border: 1px solid #57a77a;
    border-radius: 6px;
    color: #ffffff;
    font-size: 11.5px;
    font-weight: bold;
    padding: 5px 9px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.15s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    white-space: nowrap;
}

.btn-azione-top:hover:not(:disabled) {
    background: linear-gradient(180deg, #388a62 0%, #1e573a 100%);
    border-color: #ffd700;
    color: #ffd700;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.4);
}

.btn-azione-top:active:not(:disabled) {
    transform: translateY(1px);
    box-shadow: 0 1px 2px rgba(0,0,0,0.4);
}

.btn-azione-top:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    filter: grayscale(80%);
}

.btn-azione-top.active-toggle {
    background: linear-gradient(180deg, #ffd700 0%, #d49b00 100%);
    color: #1a3324;
    border-color: #fff;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.6);
}

/* Switch Lingua & Audio */
.lang-switch-header {
    display: flex;
    align-items: center;
    gap: 6px;
}

.lang-switch-header a {
    color: #cde8cd;
    text-decoration: none;
    font-size: 12px;
    font-weight: bold;
    padding: 4px 8px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.4);
    transition: all 0.2s ease;
}

.lang-switch-header a.active, .lang-switch-header a:hover {
    background: #ffd700;
    color: #111;
    border-color: #ffd700;
}

.btn-audio-game {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.5) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23ffd700"><path d="M3 9v6h4l5 5V4L7 9H3zm13.5 3c0-1.77-1.02-3.29-2.5-4.03v8.05c1.48-.73 2.5-2.25 2.5-4.02zM14 3.23v2.06c2.89.86 5 3.54 5 6.71s-2.11 5.85-5 6.71v2.06c4.01-.91 7-4.49 7-8.77s-2.99-7.86-7-8.77z"/></svg>') no-repeat center center;
    background-size: 20px 20px;
    border: 1px solid rgba(255, 215, 0, 0.4);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-audio-game:hover {
    border-color: #ffd700;
    transform: scale(1.05);
}

.btn-audio-game.muted {
    background: rgba(0, 0, 0, 0.5) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23e74c3c"><path d="M16.5 12c0-1.77-1.02-3.29-2.5-4.03v2.21l2.45 2.45c.03-.2.05-.41.05-.63zm2.5 0c0 .94-.2 1.82-.54 2.64l1.51 1.51C20.63 14.91 21 13.5 21 12c0-4.28-2.99-7.86-7-8.77v2.06c2.89.86 5 3.54 5 6.71zM4.27 3L3 4.27 7.73 9H3v6h4l5 5v-6.73l4.25 4.25c-.67.52-1.42.93-2.25 1.18v2.06c1.38-.31 2.63-.95 3.69-1.81L19.73 21 21 19.73l-9-9L4.27 3zM12 4L9.91 6.09 12 8.18V4z"/></svg>') no-repeat center center;
    background-size: 20px 20px;
    border-color: #e74c3c;
}

/* ================= AREA TAVOLO MAHJONG ================= */
#area-tavolo {
    position: absolute;
    top: 60px;
    left: 0;
    width: 1024px;
    height: 654px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

#board-container {
    position: relative;
    width: 960px;
    height: 600px;
    margin: auto;
}

/* Checkbox sempre visibile per rilevamento risolvibilità */
.control-toggle-solvability {
    position: absolute;
    bottom: 42px;
    left: 16px;
    z-index: 20;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: rgba(10, 30, 20, 0.75);
    border: 1px solid rgba(255, 215, 0, 0.35);
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 11.5px;
    font-weight: 500;
    color: #cde8cd;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
}

.control-toggle-solvability:hover {
    background: rgba(15, 45, 30, 0.9);
    border-color: #ffd700;
    color: #ffffff;
    box-shadow: 0 2px 12px rgba(255, 215, 0, 0.25);
}

.control-toggle-solvability input[type="checkbox"] {
    accent-color: #ffd700;
    cursor: pointer;
    width: 14px;
    height: 14px;
    margin: 0;
}

/* ================= STILE DELLE TESSERE 3D ================= */
.mahjong-tile {
    position: absolute;
    width: 52px;
    height: 68px;
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.12s cubic-bezier(0.2, 0, 0.2, 1), box-shadow 0.12s ease, filter 0.12s ease;
    user-select: none;
    transform-origin: center center;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Retro/Bordo Verde/Avorio a strati 3D */
.mahjong-tile-inner {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 6px;
    background: #fdfbf7;
    /* Effetto avorio lucido */
    background: linear-gradient(135deg, #ffffff 0%, #faf6ee 45%, #ece4d2 100%);
    border: 1px solid #d5caa8;
    border-top: 1px solid #ffffff;
    border-left: 1px solid #ffffff;
    box-shadow: 
        inset 1px 1px 2px rgba(255, 255, 255, 0.9),
        inset -1px -1px 2px rgba(160, 140, 100, 0.35);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 3px;
}

/* Base / Spessore 3D della tessera in verde giada */
.mahjong-tile::before {
    content: '';
    position: absolute;
    top: 3px;
    left: -4px;
    width: 100%;
    height: 100%;
    border-radius: 6px;
    background: linear-gradient(to right, #13462f 0%, #1e6946 50%, #2f8e62 100%);
    border-bottom: 2px solid #0b2b1d;
    border-left: 1px solid #3ca573;
    z-index: -1;
}

/* Ombra dinamica a terra a seconda del livello Z */
.mahjong-tile[data-layer="0"] {
    box-shadow: -4px 6px 7px rgba(0, 0, 0, 0.45);
}
.mahjong-tile[data-layer="1"] {
    box-shadow: -6px 9px 10px rgba(0, 0, 0, 0.55);
}
.mahjong-tile[data-layer="2"] {
    box-shadow: -8px 12px 14px rgba(0, 0, 0, 0.65);
}
.mahjong-tile[data-layer="3"] {
    box-shadow: -10px 15px 18px rgba(0, 0, 0, 0.75);
}
.mahjong-tile[data-layer="4"] {
    box-shadow: -12px 18px 22px rgba(0, 0, 0, 0.85);
}

/* Tessere libere / giocabili (con evidenziazione opzionale attiva) */
.highlight-free .mahjong-tile.tile-free .mahjong-tile-inner {
    box-shadow: 
        inset 1px 1px 2px rgba(255, 255, 255, 0.9),
        inset -1px -1px 2px rgba(160, 140, 100, 0.35),
        0 0 0 2px rgba(255, 215, 0, 0.75);
}

/* Tessere bloccate (leggermente oscurate quando l'evidenziazione è attiva o al passaggio mouse) */
.highlight-free .mahjong-tile.tile-blocked {
    filter: brightness(0.72) saturate(0.85);
    cursor: not-allowed;
}

/* Hover su tessera libera */
.mahjong-tile.tile-free:hover {
    transform: translate(2px, -3px) scale(1.03);
    z-index: 1000 !important;
}

.mahjong-tile.tile-free:hover .mahjong-tile-inner {
    border-color: #ffd700;
    box-shadow: 
        inset 1px 1px 3px rgba(255, 255, 255, 1),
        0 0 10px rgba(255, 215, 0, 0.6);
}

/* Tessera Selezionata */
.mahjong-tile.tile-selected {
    transform: translate(2px, -6px) scale(1.06);
    z-index: 1500 !important;
}

.mahjong-tile.tile-selected .mahjong-tile-inner {
    border: 2px solid #ffd700;
    background: linear-gradient(135deg, #ffffff 0%, #fffbf0 50%, #f7e6b5 100%);
    box-shadow: 
        inset 1px 1px 3px rgba(255, 255, 255, 1),
        0 0 16px rgba(255, 215, 0, 0.9),
        0 0 25px rgba(255, 180, 0, 0.6);
}

/* Suggerimento (Hint) lampeggiante */
.mahjong-tile.tile-hint {
    animation: pulseHint 0.8s infinite alternate ease-in-out;
    z-index: 1200 !important;
}

@keyframes pulseHint {
    0% {
        transform: translate(0, 0) scale(1);
        filter: drop-shadow(0 0 4px #00ffff);
    }
    100% {
        transform: translate(2px, -5px) scale(1.08);
        filter: drop-shadow(0 0 18px #00ffff) drop-shadow(0 0 8px #ffd700);
    }
}

/* Animazione di rimozione coppia abbinata */
.mahjong-tile.tile-removing {
    pointer-events: none;
    animation: matchDisappear 0.35s forwards cubic-bezier(0.2, 0.8, 0.3, 1);
    z-index: 2000 !important;
}

@keyframes matchDisappear {
    0% {
        transform: translate(0, 0) scale(1.06);
        opacity: 1;
    }
    50% {
        transform: translate(0, -15px) scale(1.18);
        opacity: 0.9;
        filter: brightness(1.5) drop-shadow(0 0 15px #ffd700);
    }
    100% {
        transform: translate(0, -30px) scale(0.6);
        opacity: 0;
        filter: brightness(2);
    }
}

/* Contenuto Grafico della Tessera */
.tile-face {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}

.tile-svg {
    width: 44px;
    height: 54px;
    display: block;
}

.tile-corner-hint {
    position: absolute;
    top: 1px;
    left: 2px;
    font-size: 8px;
    font-weight: 800;
    color: #666;
    line-height: 1;
    opacity: 0.65;
}

/* ================= MODALI ED OVERLAY ================= */
#schermo {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 1024px;
    height: 750px;
    background-color: rgba(0, 0, 0, 0.78);
    backdrop-filter: blur(4px);
    z-index: 30000;
}

.form-calcolo {
    position: absolute;
    width: 500px;
    left: 262px;
    top: 110px;
    background: radial-gradient(circle at 50% 30%, #1a4d35 0%, #0d2c1e 100%);
    border: 4px solid #b8860b;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.9), 0 0 25px rgba(255, 215, 0, 0.35);
    box-sizing: border-box;
    display: none;
    flex-direction: column;
    align-items: center;
    padding: 24px;
    color: #ffffff;
    z-index: 40000;
    text-align: center;
    overflow: hidden;
}

#modale-inizio {
    padding: 24px 20px 44px 20px;
}

.form-calcolo-title {
    font-size: 26px;
    font-weight: bold;
    color: #ffd700;
    text-shadow: 2px 2px 4px #000, 0 0 10px rgba(255, 215, 0, 0.5);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.confirm-message {
    font-family: 'Slackey', 'Outfit', sans-serif;
    font-size: 22px;
    color: white;
    text-align: center;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px #000;
}

/* Griglia Selezione Schema */
.grid-schemi {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 20px;
}

.btn-schema-sel {
    background: rgba(0, 0, 0, 0.4);
    border: 2px solid #2e7d52;
    border-radius: 8px;
    padding: 10px 8px;
    color: #cde8cd;
    font-size: 13px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.btn-schema-sel span.icon {
    font-size: 22px;
}

.btn-schema-sel span.sub {
    font-size: 10px;
    font-weight: normal;
    color: #a0c4a0;
}

.btn-schema-sel:hover {
    border-color: #ffd700;
    color: #fff;
    background: rgba(40, 100, 65, 0.5);
}

.btn-schema-sel.attiva {
    border-color: #ffd700;
    background: linear-gradient(180deg, #3d8f63 0%, #1f5438 100%);
    color: #ffd700;
    box-shadow: 0 0 12px rgba(255, 215, 0, 0.4);
}

.btn-continua {
    background: linear-gradient(180deg, #ffd700 0%, #d49b00 100%);
    border: 2px solid #fff;
    color: #11291b;
    font-size: 15px;
    font-weight: bold;
    padding: 10px 24px;
    border-radius: 6px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5), 0 0 15px rgba(255, 215, 0, 0.4);
    transition: all 0.15s ease;
    letter-spacing: 0.5px;
}

.btn-continua:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.6), 0 0 22px rgba(255, 215, 0, 0.7);
}

.btn-continua:active {
    transform: translateY(1px);
}

/* Modale Fine Partita / Vittoria (bassa e larga per ospitare il finish banner) */
#haivinto.modale-vittoria {
    width: 700px;
    height: 210px;
    left: 162px;
    top: 430px;
    padding: 20px 25px;
    justify-content: center;
    overflow: visible;
}

/* Modale Conferma Nuova Partita / Abbandono / Rimescola (bassa e larga per il finish banner) */
#confermatermina.modale-conferma,
#confermarimescola.modale-conferma {
    width: 700px;
    height: 180px;
    left: 162px;
    top: 470px;
    padding: 24px 25px;
    justify-content: center;
    overflow: visible;
}

.conferma-bottoni {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* Vie di fuga e link modale */
.lang-switch-modale {
    position: absolute;
    top: 14px;
    right: 14px;
    display: flex;
    gap: 4px;
}

.lang-switch-modale a {
    color: #a0c4a0;
    text-decoration: none;
    font-size: 11px;
    font-weight: bold;
    padding: 3px 6px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.3);
}

.lang-switch-modale a.active {
    background: #ffd700;
    color: #111;
    border-color: #ffd700;
}

/* Vie di fuga negli angoli bassi della modale d'avvio */
.btn-angolo-modale {
    position: absolute;
    bottom: 10px;
    height: 24px;
    line-height: 22px;
    padding: 0 10px;
    font-size: 10px;
    font-weight: bold;
    text-decoration: none;
    text-align: center;
    white-space: nowrap;
    border-radius: 4px;
    box-sizing: border-box;
    background-color: rgba(0, 40, 10, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #ccc;
    transition: all 0.2s;
}
.btn-angolo-modale:hover {
    color: #fff;
    background-color: rgba(0, 60, 20, 0.7);
    border-color: rgba(255, 255, 255, 0.4);
}
.btn-angolo-modale.sinistra { left: 12px; }
.btn-angolo-modale.destra   { right: 12px; }

.btn-angolo-modale.home {
    background: linear-gradient(135deg, #c9720f, #8a4a08);
    border-color: #ffd700;
    color: #fff;
    box-shadow: 0 0 8px rgba(255, 215, 0, 0.35);
}
.btn-angolo-modale.home:hover {
    color: #fff;
    background: linear-gradient(135deg, #e08514, #a3580a);
    border-color: #ffd700;
    box-shadow: 0 0 14px rgba(255, 215, 0, 0.65);
}

/* ================= FOOTER / LINK DI NAVIGAZIONE ================= */
.legal-links-calcolo {
    position: absolute;
    bottom: 8px;
    left: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    z-index: 40;
}

.legal-links-calcolo a {
    color: #a0c4a0;
    text-decoration: none;
    transition: color 0.15s ease;
}

.legal-links-calcolo a:hover {
    color: #ffd700;
    text-decoration: underline;
}

.legal-links-calcolo .sep {
    color: rgba(255, 255, 255, 0.3);
}

.link-giochi-calcolo {
    position: absolute;
    bottom: 8px;
    right: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    z-index: 40;
}

.pulsante-link-calcolo {
    color: #ffd700;
    text-decoration: none;
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid rgba(255, 215, 0, 0.35);
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 600;
    transition: all 0.15s ease;
}

.pulsante-link-calcolo:hover {
    background: #ffd700;
    color: #111;
    border-color: #ffd700;
}

.pulsante-home-calcolo {
    background: rgba(184, 134, 11, 0.4);
    border-color: #ffd700;
}

/* Banner Notifica Sovrapposto Veloce (ad es. "Nessuna mossa rimasta") */
#toast-notifica {
    position: absolute;
    top: 75px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: rgba(15, 30, 20, 0.95);
    border: 2px solid #ffd700;
    color: #ffd700;
    font-size: 14px;
    font-weight: bold;
    padding: 8px 20px;
    border-radius: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.6), 0 0 10px rgba(255, 215, 0, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
    z-index: 300;
}

#toast-notifica.visibile {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}