/*!
 * Sequência Numérica — quebra-cabeça deslizante
 * Mesmos tokens e mesma aparência da versão do portfólio.
 */

/* ============================================================
   Tokens
   ============================================================ */
:root {
    --s-1: 4px;
    --s-2: 8px;
    --s-3: 12px;
    --s-4: 16px;
    --s-5: 20px;
    --s-6: 24px;
    --s-8: 32px;
    --s-10: 40px;
    --s-12: 48px;
    --s-16: 64px;

    --font-display: "Bricolage Grotesque", "Segoe UI Variable Display", system-ui, sans-serif;
    --font-body: system-ui, -apple-system, "Segoe UI Variable Text", "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    --font-mono: ui-monospace, "Cascadia Code", "SF Mono", "JetBrains Mono", Consolas, monospace;

    --fs-body: 1rem;
    --fs-sm: 0.875rem;
    --fs-xs: 0.8125rem;
    --fs-label: 0.6875rem;
    --track-label: 0.16em;
    --track-tight: -0.03em;

    --bg: #0d0708;
    --bg-soft: #150c0d;
    --surface: rgba(255, 255, 255, 0.035);
    --border: rgba(255, 255, 255, 0.1);
    --border-strong: rgba(255, 255, 255, 0.19);

    --text: #f6efee;
    --text-muted: #baa7a5;
    --text-dim: #8b7877;

    --accent: #ef4444;
    --accent-2: #fb923c;
    --accent-strong: #b91c1c;
    --accent-ink: #ffffff;
    --accent-soft: rgba(239, 68, 68, 0.14);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 18px 40px -22px rgba(0, 0, 0, 0.9);
    --shadow-lg: 0 44px 90px -40px rgba(0, 0, 0, 0.95);

    --radius: 14px;
    --radius-lg: 22px;

    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --dur: 0.28s;
}

/* ============================================================
   Base
   ============================================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100svh;
    display: grid;
    place-items: center;
    padding: clamp(var(--s-4), 4vw, var(--s-10));
    background: var(--bg);
    background-image: radial-gradient(60% 55% at 50% -10%, rgba(239, 68, 68, 0.14), transparent 70%);
    background-attachment: fixed;
    color: var(--text);
    font-family: var(--font-body);
    font-size: var(--fs-body);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

h1 {
    margin: 0 0 var(--s-6);
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 5vw, 2.4rem);
    font-weight: 700;
    line-height: 1.04;
    letter-spacing: var(--track-tight);
}

p {
    margin: 0;
}

button {
    font: inherit;
    color: inherit;
}

::selection {
    background: var(--accent);
    color: var(--accent-ink);
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: var(--s-1);
}

/* ============================================================
   Painel
   ============================================================ */
.panel {
    width: 100%;
    max-width: 640px;
    padding: clamp(var(--s-8), 5vw, var(--s-12));
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-lg);
    background: var(--bg-soft);
    box-shadow: var(--shadow-lg);
}

.eyebrow {
    display: block;
    margin-bottom: var(--s-3);
    font-family: var(--font-mono);
    font-size: var(--fs-label);
    letter-spacing: var(--track-label);
    text-transform: uppercase;
    color: var(--accent);
}

.intro {
    color: var(--text-muted);
    font-size: var(--fs-sm);
}

.panel-actions {
    display: flex;
    justify-content: center;
    margin-top: var(--s-10);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--s-2);
    padding: var(--s-3) var(--s-6);
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: var(--fs-sm);
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--dur) var(--ease), background var(--dur) ease, box-shadow var(--dur) ease;
}

.btn i {
    font-size: 0.9em;
    transition: transform var(--dur) var(--ease);
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

.btn:hover i {
    transform: rotate(-90deg);
}

.btn-primary {
    background: var(--accent-strong);
    border-color: var(--accent-strong);
    color: var(--accent-ink);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: color-mix(in srgb, var(--accent-strong) 84%, #fff);
    box-shadow: 0 12px 28px -14px var(--accent);
}

/* ============================================================
   Jogo da sequência numérica
   ============================================================ */
.puzzle {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--s-5);
    margin-top: var(--s-6);
}

.puzzle-modes {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--s-2);
}

.puzzle-modes button {
    padding: var(--s-2) var(--s-4);
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: var(--fs-label);
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: color var(--dur) ease, border-color var(--dur) ease, background var(--dur) ease;
}

.puzzle-modes button:hover {
    color: var(--text);
    border-color: var(--accent);
}

.puzzle-modes button[aria-pressed="true"] {
    color: var(--text);
    border-color: var(--accent);
    background: var(--accent-soft);
}

.puzzle-board {
    position: relative;
    width: min(100%, 340px);
    aspect-ratio: var(--cols) / var(--rows);
    container-type: inline-size;
    border-radius: var(--radius);
    border: 1px solid var(--border-strong);
    background: color-mix(in srgb, var(--accent) 7%, var(--bg-soft));
    box-shadow: var(--shadow-md);
    touch-action: manipulation;
}

.puzzle-cells {
    position: absolute;
    inset: 0;
    display: grid;
    grid-template-columns: repeat(var(--cols), 1fr);
    grid-template-rows: repeat(var(--rows), 1fr);
    border-radius: inherit;
    overflow: hidden;
}

.puzzle-cells div {
    box-shadow: inset 0 0 0 1px var(--border);
    transition: background var(--dur) ease;
}

.puzzle-cells div.active {
    background: var(--accent-soft);
}

.puzzle-tile {
    position: absolute;
    top: 0;
    left: 0;
    display: grid;
    place-items: center;
    width: calc(100% / var(--cols));
    height: calc(100% / var(--rows));
    padding: 0;
    border: 0;
    background: none;
    cursor: grab;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    transform: translate(calc(var(--x, 0) * 100% + var(--dx, 0px)), calc(var(--y, 0) * 100% + var(--dy, 0px)));
    transition: transform 0.18s var(--ease);
}

/* Asterisco desenhado: as hastes ficam com o mesmo peso e altura dos números */
.puzzle-symbol {
    display: block;
    width: 0.71em;
    height: 0.71em;
    fill: none;
    overflow: visible;
}

/* Enquanto arrasta, a peça acompanha o dedo/mouse sem animação */
.puzzle-tile.dragging {
    z-index: 2;
    cursor: grabbing;
    transition: none;
}

.puzzle-tile.dragging span {
    transform: scale(1.04);
    box-shadow: 0 12px 22px rgba(10, 4, 5, 0.5);
}

.puzzle-tile span {
    display: grid;
    place-items: center;
    width: 82%;
    aspect-ratio: 1;
    border-radius: 50%;
    border: 0.26em solid #d92b2b;
    background: #fff8f7;
    color: #2a1012;
    font-family: var(--font-display);
    font-size: calc(30cqw / var(--cols));
    font-weight: 700;
    line-height: 1;
    box-shadow: 0 6px 14px rgba(10, 4, 5, 0.4);
    transition: transform 0.25s var(--ease), border-color 0.3s ease;
}

.puzzle-tile:hover span {
    transform: scale(1.06);
}

.puzzle-tile:active span {
    transform: scale(0.95);
}

.puzzle-tile:focus-visible {
    outline: none;
}

.puzzle-tile:focus-visible span {
    outline: 3px solid var(--accent);
    outline-offset: 3px;
}

.puzzle-board.solved .puzzle-tile {
    cursor: default;
}

.puzzle-board.solved .puzzle-tile span {
    border-color: #16a34a;
    animation: puzzle-pop 0.55s var(--ease) both;
    animation-delay: calc(var(--i) * 45ms);
}

@keyframes puzzle-pop {

    0%,
    100% {
        transform: scale(1);
    }

    45% {
        transform: scale(1.12);
    }
}

.puzzle-stats {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--s-1) var(--s-5);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--text-muted);
}

.puzzle-stats i {
    margin-right: var(--s-2);
    color: var(--accent-2);
}

.puzzle-stats strong {
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

.puzzle-status {
    min-height: 1.4em;
    text-align: center;
    color: var(--text-muted);
    font-size: var(--fs-sm);
}

.puzzle-status.win {
    color: #22c55e;
    font-weight: 600;
}

.puzzle-help {
    max-width: 52ch;
    text-align: center;
    color: var(--text-dim);
    font-size: var(--fs-xs);
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        transition-duration: 0.001ms !important;
    }
}