/* ============================================================
   Numberle Pro v2 — Frontend Stylesheet
   All design tokens set via CSS variables (from admin settings).
   Prefix: npg-
   ============================================================ */

/* ---- Variable defaults (overridden by admin inline style) ---- */
.npg-root {
    --npg-primary:       #2bbfa3;
    --npg-secondary:     #ff8a65;
    --npg-correct:       #2bbfa3;
    --npg-present:       #ff8a65;
    --npg-absent:        #a8b0bd;
    --npg-bg:            #f4f6f8;
    --npg-tile-bg:       #ffffff;
    --npg-tile-border:   #d8dee8;
    --npg-key-bg:        #e2e8f0;
    --npg-key-text:      #4b5563;
    --npg-text:          #1f2937;
    --npg-text-muted:    #6b7280;
    --npg-modal-bg:      #ffffff;
    --npg-surface:       #ffffff;
    --npg-border:        #e5e7eb;
    --npg-dark-bg:       #111827;
    --npg-dark-tile:     #1f2937;
    --npg-dark-text:     #f9fafb;
    --npg-max-width:     560px;
    --npg-tile-desktop:  54px;
    --npg-tile-mobile:   38px;
    --npg-tile-radius:   8px;
    --npg-btn-radius:    8px;
    --npg-card-radius:   14px;
    --npg-font:          system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --npg-font-mono:     'Courier New', Courier, monospace;

    /* Derived */
    --npg-shadow:        0 2px 8px rgba(0,0,0,0.08);
    --npg-shadow-md:     0 8px 30px rgba(0,0,0,0.15);
    --npg-overlay:       rgba(0,0,0,0.4);
    --npg-transition:    0.2s ease;
}

/* ============================================================
   DARK MODE
   ============================================================ */
.npg-root.npg-dark {
    --npg-bg:          var(--npg-dark-bg);
    --npg-tile-bg:     var(--npg-dark-tile);
    --npg-tile-border: #374151;
    --npg-key-bg:      #374151;
    --npg-key-text:    var(--npg-dark-text);
    --npg-text:        var(--npg-dark-text);
    --npg-text-muted:  #9ca3af;
    --npg-modal-bg:    #1f2937;
    --npg-surface:     #1f2937;
    --npg-border:      #374151;
    --npg-shadow:      0 2px 8px rgba(0,0,0,0.3);
    --npg-shadow-md:   0 8px 30px rgba(0,0,0,0.5);
    --npg-overlay:     rgba(0,0,0,0.65);
}

/* ============================================================
   COLOR BLIND MODE
   ============================================================ */
.npg-root.npg-colorblind {
    --npg-correct: #0077bb;
    --npg-present: #ee7733;
    --npg-absent:  #bbbbbb;
}

/* ============================================================
   SHADOW / ANIM MODIFIERS
   ============================================================ */
.npg-root.npg-no-shadow  { --npg-shadow: none; --npg-shadow-md: none; }
.npg-root.npg-no-anim    * { animation: none !important; transition: none !important; }
.npg-root.npg-no-hover  .npg-key:hover { background: var(--npg-key-bg); transform: none; }

/* ============================================================
   RESET & BASE
   ============================================================ */
.npg-root *, .npg-root *::before, .npg-root *::after {
    box-sizing: border-box; margin: 0; padding: 0;
}
.npg-root {
    font-family: var(--npg-font);
    background: var(--npg-bg);
    color: var(--npg-text);
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: var(--npg-max-width);
    margin: 0 auto;
    border-radius: var(--npg-card-radius);
    overflow: hidden;
    position: relative;
    min-height: 580px;
    transition: background var(--npg-transition), color var(--npg-transition);
}
.npg-hidden { display: none !important; }
button { cursor: pointer; font-family: inherit; }

/* ============================================================
   HEADER
   ============================================================ */
.npg-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--npg-surface);
    border-bottom: 1px solid var(--npg-border);
    transition: background var(--npg-transition);
    position: relative;
    z-index: 20;
}

.npg-logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
}

.npg-logo-icon svg { display: block; border-radius: 6px; }

.npg-logo-texts { display: flex; flex-direction: column; line-height: 1.2; }

.npg-logo-name {
    font-size: 1rem;
    font-weight: 800;
    color: var(--npg-text);
    letter-spacing: -0.3px;
}

.npg-logo-sub {
    font-size: 0.68rem;
    color: var(--npg-text-muted);
    font-weight: 400;
    display: none; /* hidden on small header */
}

.npg-header-btns {
    display: flex;
    align-items: center;
    gap: 2px;
}

.npg-icon-btn {
    background: none;
    border: none;
    padding: 7px 8px;
    border-radius: var(--npg-btn-radius);
    color: var(--npg-text);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--npg-transition);
    line-height: 1;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.3px;
}

.npg-icon-btn:hover { background: var(--npg-border); }

.npg-icon-btn svg {
    width: 19px;
    height: 19px;
    display: block;
}

/* ============================================================
   DAILY BAR
   ============================================================ */
.npg-daily-bar {
    width: 100%;
    background: var(--npg-surface);
    border-bottom: 1px solid var(--npg-border);
    padding: 6px 14px;
    font-size: 0.78rem;
    color: var(--npg-text-muted);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.npg-daily-bar strong { color: var(--npg-primary); }

/* ============================================================
   TOAST
   ============================================================ */
.npg-toast-wrap {
    position: absolute;
    top: 58px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 300;
    pointer-events: none;
    width: 90%;
    display: flex;
    justify-content: center;
}

.npg-toast {
    background: var(--npg-text);
    color: var(--npg-surface);
    padding: 9px 20px;
    border-radius: 20px;
    font-size: 0.83rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity 0.2s ease, transform 0.2s ease;
    max-width: 100%;
    text-align: center;
}

.npg-toast.npg-toast-show {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
   BOARD
   ============================================================ */
.npg-board-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px 12px 10px;
    width: 100%;
}

.npg-board {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.npg-row {
    display: flex;
    gap: 6px;
}

/* ---- TILE ---- */
.npg-tile {
    width: var(--npg-tile-desktop);
    height: var(--npg-tile-desktop);
    border: 2.5px solid var(--npg-tile-border);
    border-radius: var(--npg-tile-radius);
    background: var(--npg-tile-bg);
    color: var(--npg-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--npg-font-mono);
    font-size: calc(var(--npg-tile-desktop) * 0.48);
    font-weight: 800;
    user-select: none;
    transition: border-color 0.1s, background 0.15s;
    box-shadow: var(--npg-shadow);
    position: relative;
}

/* current active tile */
.npg-tile.npg-tile-current { border-color: var(--npg-primary); }

/* filled (has letter) */
.npg-tile.npg-tile-filled { animation: npg-pop 0.08s ease; }

/* result colors */
.npg-tile.npg-tile-correct {
    background: var(--npg-correct);
    border-color: var(--npg-correct);
    color: #fff;
}
.npg-tile.npg-tile-present {
    background: var(--npg-present);
    border-color: var(--npg-present);
    color: #fff;
}
.npg-tile.npg-tile-none {
    background: var(--npg-absent);
    border-color: var(--npg-absent);
    color: #fff;
}

/* ---- Animations ---- */
@keyframes npg-pop {
    0%   { transform: scale(1); }
    40%  { transform: scale(1.12); }
    100% { transform: scale(1); }
}

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

.npg-tile.npg-flipping {
    animation: npg-flip-in 0.25s ease forwards;
}
.npg-tile.npg-flipped {
    animation: npg-flip-out 0.25s ease forwards;
}

@keyframes npg-shake {
    0%,100% { transform: translateX(0); }
    20%      { transform: translateX(-6px); }
    40%      { transform: translateX(6px); }
    60%      { transform: translateX(-4px); }
    80%      { transform: translateX(4px); }
}
.npg-row.npg-shaking { animation: npg-shake 0.4s ease; }

@keyframes npg-bounce {
    0%,100% { transform: translateY(0); }
    50%      { transform: translateY(-8px); }
}
.npg-tile.npg-bouncing { animation: npg-bounce 0.5s ease; }

/* ============================================================
   KEYBOARD
   ============================================================ */
.npg-keyboard-area {
    width: 100%;
    padding: 6px 8px 14px;
}

.npg-keyboard {
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: center;
    max-width: 100%;
}

.npg-key-row {
    display: flex;
    gap: 5px;
    justify-content: center;
    width: 100%;
}

.npg-key {
    flex: 1;
    max-width: 42px;
    height: 56px;
    background: var(--npg-key-bg);
    color: var(--npg-key-text);
    border: none;
    border-radius: var(--npg-btn-radius);
    font-size: 1.05rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 0 rgba(0,0,0,0.12);
    transition: background 0.15s, color 0.15s, transform 0.07s;
    user-select: none;
    min-width: 28px;
}

.npg-key:hover  { filter: brightness(0.94); }
.npg-key:active { transform: translateY(2px); box-shadow: none; }

.npg-key-wide {
    flex: 1.6;
    max-width: 64px;
    font-size: 0.72rem;
    letter-spacing: 0.2px;
}

.npg-key-op { font-size: 1.1rem; }

.npg-key-enter {
    background: var(--npg-primary);
    color: #fff;
}

.npg-key-enter:hover { filter: brightness(0.9); }

/* Key feedback colors */
.npg-key.npg-key-correct { background: var(--npg-correct) !important; color: #fff !important; }
.npg-key.npg-key-present { background: var(--npg-present) !important; color: #fff !important; }
.npg-key.npg-key-none    { background: var(--npg-absent)  !important; color: #fff !important; opacity: 0.75; }

/* ============================================================
   MODALS
   ============================================================ */
.npg-modal {
    position: absolute;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
}

.npg-modal-bg {
    position: absolute;
    inset: 0;
    background: var(--npg-overlay);
    cursor: pointer;
}

.npg-modal-card {
    position: relative;
    background: var(--npg-modal-bg);
    border-radius: var(--npg-card-radius);
    width: 100%;
    max-width: 420px;
    max-height: 92%;
    overflow-y: auto;
    box-shadow: var(--npg-shadow-md);
    animation: npg-modal-in 0.2s ease;
    scrollbar-width: thin;
    scrollbar-color: var(--npg-border) transparent;
}

.npg-modal-card::-webkit-scrollbar { width: 4px; }
.npg-modal-card::-webkit-scrollbar-thumb { background: var(--npg-border); border-radius: 10px; }

@keyframes npg-modal-in {
    from { opacity: 0; transform: scale(0.94) translateY(12px); }
    to   { opacity: 1; transform: scale(1)    translateY(0);    }
}

.npg-modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 18px 14px;
    border-bottom: 1px solid var(--npg-border);
    position: sticky;
    top: 0;
    background: var(--npg-modal-bg);
    z-index: 2;
}

.npg-modal-title {
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--npg-text);
}

.npg-modal-x {
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--npg-text-muted);
    padding: 2px 6px;
    border-radius: 6px;
    line-height: 1;
    transition: background var(--npg-transition);
}
.npg-modal-x:hover { background: var(--npg-border); }

.npg-modal-body {
    padding: 16px 18px 22px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.npg-sec-label {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--npg-text-muted);
    margin: 0;
}

.npg-sep {
    height: 1px;
    background: var(--npg-border);
}

/* ============================================================
   SETTINGS MODAL — CHIPS
   ============================================================ */
.npg-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.npg-chip {
    min-width: 38px;
    height: 36px;
    padding: 0 12px;
    border: 2px solid var(--npg-border);
    border-radius: var(--npg-btn-radius);
    background: var(--npg-tile-bg);
    color: var(--npg-text);
    font-size: 0.9rem;
    font-weight: 700;
    transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.npg-chip.npg-chip-on {
    border-color: var(--npg-primary);
    background: var(--npg-primary);
    color: #fff;
}

.npg-chip.npg-chip-off { opacity: 0.4; }

/* ---- Toggle list in settings ---- */
.npg-toggle-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.npg-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 11px 0;
    border-bottom: 1px solid var(--npg-border);
}
.npg-toggle-row:last-child { border-bottom: none; }

.npg-toggle-info { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.npg-toggle-name { font-size: 0.9rem; font-weight: 600; color: var(--npg-text); }
.npg-toggle-desc { font-size: 0.75rem; color: var(--npg-text-muted); }

/* Toggle switch (frontend) */
.npg-sw {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}
.npg-sw input { opacity: 0; width: 0; height: 0; position: absolute; }
.npg-sw-track {
    position: absolute;
    inset: 0;
    background: var(--npg-border);
    border-radius: 24px;
    cursor: pointer;
    transition: background 0.2s;
}
.npg-sw-track::before {
    content: '';
    position: absolute;
    width: 18px; height: 18px;
    left: 3px; top: 3px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}
.npg-sw input:checked ~ .npg-sw-track { background: var(--npg-primary); }
.npg-sw input:checked ~ .npg-sw-track::before { transform: translateX(20px); }

/* ============================================================
   STATS MODAL
   ============================================================ */
.npg-stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.npg-stat-card {
    background: var(--npg-bg);
    border: 1px solid var(--npg-border);
    border-radius: 10px;
    padding: 12px 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    box-shadow: var(--npg-shadow);
}

.npg-stat-val {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--npg-text);
    line-height: 1;
}

.npg-stat-lbl {
    font-size: 0.62rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--npg-text-muted);
}

/* ---- Distribution graph ---- */
.npg-dist {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.npg-dist-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
}

.npg-dist-n {
    width: 14px;
    text-align: right;
    font-weight: 800;
    color: var(--npg-text-muted);
    flex-shrink: 0;
}

.npg-dist-track {
    flex: 1;
    background: var(--npg-bg);
    border: 1px solid var(--npg-border);
    border-radius: 4px;
    height: 24px;
    overflow: hidden;
}

.npg-dist-bar {
    height: 100%;
    background: var(--npg-absent);
    border-radius: 4px;
    min-width: 24px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 8px;
    font-size: 0.75rem;
    font-weight: 800;
    color: #fff;
    transition: width 0.6s ease;
}

.npg-dist-bar.npg-dist-win { background: var(--npg-correct); }

/* ============================================================
   HELP MODAL
   ============================================================ */
.npg-help-intro {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--npg-text);
}

.npg-help-eg {
    display: flex;
    justify-content: center;
    padding: 8px 0;
}

.npg-help-row {
    display: flex;
    gap: 5px;
}

.npg-h-tile {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 800;
    font-family: var(--npg-font-mono);
    color: #fff;
    background: var(--npg-absent);
}
.npg-h-tile.npg-tile-correct { background: var(--npg-correct); }
.npg-h-tile.npg-tile-present { background: var(--npg-present); }
.npg-h-tile.npg-tile-none    { background: var(--npg-absent); }

.npg-legend {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.npg-legend-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--npg-text);
}
.npg-dot {
    width: 22px;
    height: 22px;
    border-radius: 5px;
    flex-shrink: 0;
    background: var(--npg-absent);
}
.npg-dot.npg-tile-correct { background: var(--npg-correct); }
.npg-dot.npg-tile-present { background: var(--npg-present); }
.npg-dot.npg-tile-none    { background: var(--npg-absent); }

.npg-rules {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.npg-rules li {
    font-size: 0.83rem;
    color: var(--npg-text);
    padding-left: 16px;
    position: relative;
    line-height: 1.45;
}
.npg-rules li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--npg-primary);
    font-weight: 900;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.npg-btn-primary {
    display: block;
    width: 100%;
    padding: 13px;
    background: var(--npg-primary);
    color: #fff;
    border: none;
    border-radius: var(--npg-btn-radius);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.2px;
    transition: filter 0.15s, transform 0.1s;
}
.npg-btn-primary:hover  { filter: brightness(0.92); }
.npg-btn-primary:active { transform: scale(0.98); }

.npg-btn-outline {
    display: block;
    width: 100%;
    padding: 12px;
    background: transparent;
    color: var(--npg-text);
    border: 2px solid var(--npg-border);
    border-radius: var(--npg-btn-radius);
    font-size: 0.875rem;
    font-weight: 600;
    transition: background 0.15s, border-color 0.15s;
}
.npg-btn-outline:hover { background: var(--npg-bg); border-color: var(--npg-primary); color: var(--npg-primary); }

/* ============================================================
   RESULT PANEL
   ============================================================ */
.npg-result {
    position: absolute;
    inset: 0;
    z-index: 80;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 12px;
    background: var(--npg-overlay);
}

.npg-result-card {
    background: var(--npg-modal-bg);
    border-radius: var(--npg-card-radius) var(--npg-card-radius) 10px 10px;
    padding: 22px 20px 18px;
    width: 100%;
    max-width: 420px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: var(--npg-shadow-md);
    animation: npg-slide-up 0.3s ease;
}

@keyframes npg-slide-up {
    from { opacity: 0; transform: translateY(50px); }
    to   { opacity: 1; transform: translateY(0); }
}

.npg-result-emoji {
    font-size: 2.2rem;
    text-align: center;
    line-height: 1;
}

.npg-result-title {
    font-size: 1.2rem;
    font-weight: 800;
    text-align: center;
    color: var(--npg-text);
}

.npg-result-tries {
    font-size: 0.85rem;
    color: var(--npg-text-muted);
    text-align: center;
    font-weight: 600;
}

.npg-result-answer {
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    font-family: var(--npg-font-mono);
    color: var(--npg-text);
    background: var(--npg-bg);
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--npg-border);
    letter-spacing: 0.5px;
}

.npg-result-btns {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 2px;
}

.npg-related-links {
    display: flex;
    flex-direction: column;
    gap: 6px;
    border-top: 1px solid var(--npg-border);
    padding-top: 12px;
}

.npg-related-links a {
    display: block;
    font-size: 0.82rem;
    color: var(--npg-primary);
    text-decoration: none;
    font-weight: 600;
    padding: 5px 0;
    transition: opacity 0.15s;
}

.npg-related-links a:hover { opacity: 0.75; text-decoration: underline; }

/* ============================================================
   CONFETTI CANVAS
   ============================================================ */
.npg-confetti {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 70;
}

/* ============================================================
   FOOTER
   ============================================================ */
.npg-footer {
    width: 100%;
    text-align: center;
    padding: 10px 14px;
    font-size: 0.72rem;
    color: var(--npg-text-muted);
    border-top: 1px solid var(--npg-border);
    line-height: 1.5;
}

/* ============================================================
   RESPONSIVE — Mobile
   ============================================================ */
@media (max-width: 480px) {
    .npg-tile {
        width: var(--npg-tile-mobile);
        height: var(--npg-tile-mobile);
        font-size: calc(var(--npg-tile-mobile) * 0.5);
        border-width: 2px;
    }
    .npg-board { gap: 4px; }
    .npg-row   { gap: 4px; }
    .npg-key   { height: 48px; font-size: 0.9rem; }
    .npg-key-wide { font-size: 0.65rem; }
    .npg-key-row { gap: 3px; }
    .npg-stat-val { font-size: 1.3rem; }
    .npg-logo-name { font-size: 0.9rem; }
}

@media (max-width: 360px) {
    .npg-tile { width: 30px; height: 30px; font-size: 13px; }
    .npg-key  { height: 42px; font-size: 0.8rem; }
}