/* ==========================================================================
   Wordle - Nekoh Games
   Dark-mode nativo, mobile-first.
   ========================================================================== */

:root {
    --bg: #0f1115;
    --surface: #181b21;
    --surface-raised: #21252e;
    --border: #33383f;
    --border-strong: #565f6b;
    --text: #e7e9ec;
    --text-dim: #9aa3ad;

    --correct: #4c9a52;
    --present: #b59f3b;
    --absent: #3a3d43;

    --key-bg: #6e7681;
    --key-text: #ffffff;

    --accent: #4c9a52;
    --danger: #d9534f;

    --tile-gap: 6px;
    --radius: 8px;

    --flip-duration: 550ms;
    --flip-stagger: 320ms;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    height: 100%;
}

body {
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
    -webkit-tap-highlight-color: transparent;
    overscroll-behavior: none;
}

.app {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100dvh;
    max-width: 520px;
    margin: 0 auto;
    padding: 0 8px env(safe-area-inset-bottom);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 10px 4px;
    border-bottom: 1px solid var(--border);
}

.title {
    font-size: clamp(1.4rem, 6vw, 1.9rem);
    font-weight: 800;
    letter-spacing: 0.18em;
    text-align: center;
    flex: 1;
    user-select: none;
}

.header-side {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 84px;
}

.header-side-right {
    justify-content: flex-end;
}

.icon-btn {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-dim);
    cursor: pointer;
    transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.icon-btn:hover,
.icon-btn:focus-visible {
    color: var(--text);
    border-color: var(--border-strong);
    background: var(--surface-raised);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
}

/* Selettore lingua */

.lang-switch {
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--surface);
}

.lang-btn {
    padding: 8px 12px;
    border: none;
    background: transparent;
    color: var(--text-dim);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
}

.lang-btn + .lang-btn {
    border-left: 1px solid var(--border);
}

.lang-btn:hover {
    color: var(--text);
}

.lang-btn.active {
    background: var(--accent);
    color: #fff;
}

/* --------------------------------------------------------------------------
   Layout principale
   -------------------------------------------------------------------------- */

.main {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    width: 100%;
    padding: 12px 0 8px;
    gap: clamp(12px, 3dvh, 28px);
}

/* --------------------------------------------------------------------------
   Griglia di gioco
   -------------------------------------------------------------------------- */

.board {
    display: grid;
    grid-template-rows: repeat(6, 1fr);
    gap: var(--tile-gap);
    /* Dimensionata per stare in viewport bassi senza scroll */
    width: min(88vw, 340px, 46dvh);
    flex: 1;
    max-height: 420px;
    align-content: center;
}

.row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--tile-gap);
}

.tile {
    display: grid;
    place-items: center;
    aspect-ratio: 1;
    border: 2px solid var(--border);
    border-radius: 4px;
    background: transparent;
    font-size: clamp(1.2rem, 7vw, 2rem);
    font-weight: 800;
    text-transform: uppercase;
    user-select: none;
    transition: border-color 0.1s ease;
}

.tile[data-state="tbd"] {
    border-color: var(--border-strong);
    animation: pop 0.1s ease;
}

.tile[data-state="correct"],
.tile[data-state="present"],
.tile[data-state="absent"] {
    border-color: transparent;
    color: #fff;
}

.tile[data-state="correct"] { background: var(--correct); }
.tile[data-state="present"] { background: var(--present); }
.tile[data-state="absent"]  { background: var(--absent); }

/* Animazioni tile */

@keyframes pop {
    0%   { transform: scale(0.85); }
    60%  { transform: scale(1.08); }
    100% { transform: scale(1); }
}

.tile.flip {
    animation: flip var(--flip-duration) ease forwards;
}

@keyframes flip {
    0%   { transform: rotateX(0); }
    50%  { transform: rotateX(-90deg); }
    100% { transform: rotateX(0); }
}

.row.shake {
    animation: shake 0.55s ease;
}

@keyframes shake {
    10%, 90%       { transform: translateX(-2px); }
    20%, 80%       { transform: translateX(4px); }
    30%, 50%, 70%  { transform: translateX(-6px); }
    40%, 60%       { transform: translateX(6px); }
    100%           { transform: translateX(0); }
}

.tile.bounce {
    animation: bounce 0.9s ease;
}

@keyframes bounce {
    0%, 20%       { transform: translateY(0); }
    40%           { transform: translateY(-26px); }
    55%           { transform: translateY(4px); }
    70%           { transform: translateY(-12px); }
    85%           { transform: translateY(2px); }
    100%          { transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   Tastiera a schermo
   -------------------------------------------------------------------------- */

.keyboard {
    display: flex;
    flex-direction: column;
    gap: 7px;
    width: 100%;
    max-width: 500px;
    padding-bottom: 6px;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: 5px;
}

.key {
    flex: 1;
    max-width: 46px;
    height: clamp(48px, 7.5dvh, 58px);
    border: none;
    border-radius: 5px;
    background: var(--key-bg);
    color: var(--key-text);
    font-size: 0.95rem;
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
    user-select: none;
    touch-action: manipulation;
    transition: background 0.15s ease, transform 0.05s ease;
}

.key:active {
    transform: scale(0.94);
}

.key.key-wide {
    flex: 1.6;
    max-width: 78px;
    font-size: 0.72rem;
    letter-spacing: 0.02em;
}

.key svg {
    width: 22px;
    height: 22px;
    vertical-align: middle;
}

.key[data-state="correct"] { background: var(--correct); }
.key[data-state="present"] { background: var(--present); }
.key[data-state="absent"]  { background: var(--absent); color: var(--text-dim); }

/* --------------------------------------------------------------------------
   Toast
   -------------------------------------------------------------------------- */

.toast-container {
    position: fixed;
    top: 72px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 200;
    pointer-events: none;
}

.toast {
    padding: 10px 18px;
    border-radius: var(--radius);
    background: var(--text);
    color: var(--bg);
    font-weight: 700;
    font-size: 0.95rem;
    white-space: nowrap;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
    animation: toast-in 0.18s ease;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.hide {
    opacity: 0;
    transform: translateY(-8px);
}

@keyframes toast-in {
    from { opacity: 0; transform: translateY(-8px) scale(0.96); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* --------------------------------------------------------------------------
   Modal statistiche
   -------------------------------------------------------------------------- */

.modal-backdrop {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 16px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(2px);
    z-index: 100;
    animation: fade-in 0.15s ease;
}

.modal-backdrop.hidden {
    display: none;
}

@keyframes fade-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.modal {
    position: relative;
    width: 100%;
    max-width: 380px;
    padding: 26px 22px 22px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface);
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
    animation: modal-in 0.2s ease;
}

@keyframes modal-in {
    from { opacity: 0; transform: translateY(14px) scale(0.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-close {
    position: absolute;
    top: 10px;
    right: 12px;
    border: none;
    background: transparent;
    color: var(--text-dim);
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
    transition: color 0.15s ease;
}

.modal-close:hover {
    color: var(--text);
}

.modal-title {
    text-align: center;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 18px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 18px;
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: clamp(1.5rem, 6vw, 2rem);
    font-weight: 800;
    line-height: 1.1;
}

.stat-label {
    font-size: 0.68rem;
    color: var(--text-dim);
    margin-top: 4px;
    line-height: 1.25;
}

.modal-solution {
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-dim);
    margin-bottom: 16px;
}

.modal-solution strong {
    color: var(--text);
    letter-spacing: 0.08em;
}

.modal-solution.hidden {
    display: none;
}

.modal-text {
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-dim);
    line-height: 1.5;
    margin-bottom: 20px;
}

.modal-actions {
    display: flex;
    gap: 10px;
}

.modal-actions .btn-primary,
.modal-actions .btn-secondary {
    flex: 1;
    width: auto;
}

.btn-primary,
.btn-secondary {
    display: block;
    width: 100%;
    padding: 13px;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    cursor: pointer;
    transition: filter 0.15s ease, border-color 0.15s ease, background 0.15s ease, transform 0.05s ease;
}

.btn-primary {
    border: none;
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    filter: brightness(1.1);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-secondary {
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
}

.btn-secondary:hover {
    border-color: var(--border-strong);
    background: var(--surface-raised);
}

.btn-secondary:active {
    transform: scale(0.98);
}

/* --------------------------------------------------------------------------
   Accessibilità
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    .tile.flip,
    .tile.bounce,
    .row.shake,
    .tile[data-state="tbd"] {
        animation: none;
    }
}