/* ==============================================
   DESIGN TOKENS
   ============================================== */
:root {
  --color-bg: #222222;
  --color-text: #eeeeee;
  --color-border: #eeeeee;
  --color-muted: #aaaaaa;
  --color-faint: #555555;
  --color-divider: #444444;

  --color-hint: #eeeeee;
  --color-win: #c8f77b;
  --color-high: #69b8ff;
  --color-low: #ff8c69;
  --color-high-tint: rgb(105 184 255 / 0.35);
  --color-low-tint: rgb(255 140 105 / 0.35);

  --font: "Press Start 2P", "Courier New", Courier, monospace;
  --text-xs: 0.625rem;
  --text-sm: 0.6875rem;
  --text-base: 0.75rem;
  --text-md: 0.875rem;
  --text-xl: 1.5rem;
  --text-badge: 2.5rem;

  --border-thick: 0.4375rem solid var(--color-border);
  --border-mid: 0.25rem solid var(--color-border);
  --border-thin: 0.1875rem solid var(--color-border);
  --border-dim: 0.125rem solid var(--color-divider);

  --t-fast: 120ms ease;

  --max-content: 87.5rem;
  --header-pb: 7.5rem;
  --header-pb-mobile: 3rem;
}

:root[data-hint="win"] {
  --color-hint: var(--color-win);
}
:root[data-hint="high"] {
  --color-hint: var(--color-high);
}
:root[data-hint="low"] {
  --color-hint: var(--color-low);
}

/* ==============================================
   RESET
   ============================================== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

/* ==============================================
   BASE
   ============================================== */
html {
  font-size: 16px;
}

body {
  font-family: var(--font);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-block-size: 100dvh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

/* ==============================================
   HEADER
   ============================================== */
.header {
  position: relative;
  inline-size: 100%;
  border-block-end: var(--border-thick);
  flex-shrink: 0;
  padding-block-start: 5rem;
  padding-block-end: var(--header-pb-mobile);
}

.header__nav {
  position: absolute;
  inset-block-start: 0;
  inset-inline: 0;
  block-size: 3.5rem;
  pointer-events: none;
  z-index: 10;
}
.header__nav > * {
  pointer-events: auto;
}

.header__again {
  position: absolute;
  inset-block-start: 0.75rem;
  inset-inline-start: 1rem;
  font-family: var(--font);
  font-size: var(--text-sm);
  background: transparent;
  color: var(--color-text);
  border: var(--border-thin);
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  transition:
    background var(--t-fast),
    color var(--t-fast);
}
.header__again:hover {
  background: var(--color-text);
  color: var(--color-bg);
}
.again-label {
  display: none;
}

.header__between {
  position: absolute;
  inset-block-start: 1rem;
  inset-inline-end: 1rem;
  font-size: var(--text-xs);
  color: var(--color-text);
  border: var(--border-thin);
  padding: 0.5rem 0.875rem;
}
.range-short {
  display: inline;
}
.range-long {
  display: none;
}

.header__title {
  text-align: center;
  font-size: clamp(0.875rem, 4vw, 1.625rem);
  line-height: 1.6;
  margin-block-end: 1.875rem;
}

.header__badge {
  position: absolute;
  inset-block-end: 0;
  inset-inline-start: 50%;
  transform: translate(-50%, 50%);
  inline-size: 7.25rem;
  padding-block: 0.75rem;
  text-align: center;
  font-size: var(--text-badge);
  background: var(--color-text);
  color: #333;
  z-index: 2;
}
.header__badge--win {
  background: var(--color-win);
  color: #222;
  box-shadow: 0 0 2rem color-mix(in srgb, var(--color-win) 40%, transparent);
}

/* ==============================================
   MAIN & PANELS
   ============================================== */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 1.75rem 1.25rem;
  inline-size: 100%;
}
.panel--left {
  border-block-end: 0.1875rem solid var(--color-divider);
}
.panel--right {
  align-items: flex-start;
  font-size: var(--text-md);
  flex: 1;
  justify-content: flex-start;
}

.panel__input {
  background: none;
  border: var(--border-mid);
  font-family: var(--font);
  color: var(--color-text);
  font-size: var(--text-xl);
  padding: 1rem 1.25rem;
  inline-size: 58%;
  text-align: center;
  outline: none;
  transition: border-color var(--t-fast);
}
.panel__input:focus {
  border-color: var(--color-text);
}

.panel__input:disabled,
.btn--solid:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

@media (max-width: 64rem) {
  .panel__input,
  .btn--solid {
    display: none;
  }

  .header__again .fa-rotate {
    font-size: 1.125rem;
  }

  .header__between {
    font-size: var(--text-sm);
    padding: 0.5rem 1rem;
  }
}

.panel__message {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-hint);
  min-block-size: 2.4em;
}

.panel__divider {
  inline-size: 100%;
  border: none;
  border-block-start: var(--border-dim);
}

.panel__score {
  font-size: 0.75rem;
  color: var(--color-muted);
}
.panel__score span {
  color: var(--color-text);
  font-size: 0.875rem;
}

#js-highscore {
  color: var(--color-win);
  font-size: 0.875rem;
}

.panel__attempts {
  font-size: var(--text-xs);
  color: var(--color-faint);
}

/* ==============================================
   NUMBER GRID
   ============================================== */
.numgrid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  inline-size: 97%;
  margin-block-start: 2.75rem;
}
.numgrid__label {
  display: none;
  inline-size: 100%;
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-faint);
  text-transform: uppercase;
  margin-block-end: 0.5rem;
}
.numgrid__cell {
  inline-size: 2.375rem;
  block-size: 2.375rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0.125rem solid #7d7b7b;
  color: #7d7b7b;
  font-size: var(--text-xs);
  font-weight: 700;
  transition: all var(--t-fast);
  user-select: none;
}

@media (max-width: 64rem) {
  .numgrid__cell {
    inline-size: 3.25rem;
    block-size: 3.25rem;
    font-size: 0.75rem;
    cursor: pointer;
  }
  .numgrid__cell:active {
    opacity: 0.6;
  }

  .numgrid__cell--high,
  .numgrid__cell--low,
  .numgrid__cell--win {
    cursor: default;
  }

  .numgrid {
    gap: 0.625rem;
    inline-size: 100%;
  }
}

.numgrid__cell--high {
  border-color: var(--color-high-tint);
  color: var(--color-high);
}
.numgrid__cell--low {
  border-color: var(--color-low-tint);
  color: var(--color-low);
}
.numgrid__cell--win {
  background: var(--color-win);
  border-color: var(--color-win);
  color: #222;
}

/* ==============================================
   BUTTONS
   ============================================== */
.btn {
  font-family: var(--font);
  font-size: var(--text-sm);
  cursor: pointer;
}
.btn--solid {
  background: var(--color-text);
  color: var(--color-bg);
  border: none;
  padding-block: 1.125rem;
  padding-inline: 1.5rem;
  transition: background var(--t-fast);
  inline-size: 58%;
}
.btn--solid:hover {
  background: #cccccc;
}

/* ==============================================
   TABLET
   ============================================== */
@media (min-width: 37.5rem) and (max-width: 64rem) {
  .numgrid__label {
    display: block;
  }

  .header__between {
    font-size: 0.75rem;
    padding: 0.5rem 1rem;
    inset-block-start: 1.125rem;
    inset-inline-end: 1.25rem;
  }
  .header__again {
    font-size: 0.8125rem;
    padding: 0.625rem 0.875rem;
    inset-block-start: 0.875rem;
    inset-inline-start: 1.25rem;
  }

  .numgrid {
    inline-size: 75%;
  }

  .panel {
    padding: 2rem 1.75rem;
    gap: 1.75rem;
  }
}

/* ==============================================
   DESKTOP
   ============================================== */
@media (min-width: 64.0625rem) {
  .numgrid__label {
    display: block;
  }

  .header {
    padding-block-start: 0;
    padding-block-end: var(--header-pb);
  }

  .header__nav {
    position: static;
    block-size: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2.5rem 3rem;
    pointer-events: auto;
  }

  .header__again {
    position: static;
    font-size: var(--text-md);
    padding: 0.875rem 1.375rem;
    order: 1;
  }
  .header__again .fa-rotate {
    display: none;
  }
  .again-label {
    display: inline;
  }

  .header__between {
    position: static;
    font-size: var(--text-md);
    padding: 0;
    border: none;
    order: 2;
  }
  .range-short {
    display: none;
  }
  .range-long {
    display: inline;
  }

  .header__badge {
    inline-size: 8.75rem;
    padding-block: 1.875rem;
  }

  .main {
    flex-direction: row;
    max-inline-size: var(--max-content);
    margin-inline: auto;
  }

  .panel--left {
    border-inline-end: 0.1875rem solid var(--color-divider);
    border-block-end: none;
    flex: 1;
    padding: 3rem 2.5rem;
  }

  .panel--right {
    flex: 1;
    padding: 10rem 2.5rem 2rem;
  }

  .numgrid {
    inline-size: 70%;
    gap: 0.75rem;
  }
  .numgrid__cell {
    inline-size: 2.75rem;
    block-size: 2.75rem;
  }

  .panel__input {
    padding-block: 2rem;
    inline-size: 45%;
    font-size: 2.25rem;
  }
  .btn--solid {
    inline-size: 45%;
  }
}