/* Milimetrik kâğıt ve kırmızı kalem: tek süs grafiğin ızgarası, tek vurgu kullanıcının değeri. */

@font-face {
  font-family: "Source Serif 4";
  src: url("fonts/source-serif-4-latin-wght-normal.woff2") format("woff2");
  font-weight: 200 900;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Source Serif 4";
  src: url("fonts/source-serif-4-latin-ext-wght-normal.woff2") format("woff2");
  font-weight: 200 900;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+1E00-1E9F, U+2020, U+2113,
    U+A720-A7FF;
}
@font-face {
  font-family: "Public Sans";
  src: url("fonts/public-sans-latin-wght-normal.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Public Sans";
  src: url("fonts/public-sans-latin-ext-wght-normal.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+1E00-1E9F, U+2020, U+2113,
    U+A720-A7FF;
}

:root {
  --paper: #f3f6f4;
  --grid: #a9d3c4;
  --ink: #1d2a44;
  --blue: #3d6fb6;
  --graphite: #5b6170;
  --red: #c2362b;
  --grid-minor-opacity: 0.45;
  --band-opacity: 0.16;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "Public Sans", system-ui, sans-serif;
  color-scheme: light;
}

/* Koyu tema: siyanotip (mavi baskı) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14202f;
    --grid: #27405a;
    --ink: #dce6ee;
    --blue: #7fa8e0;
    --graphite: #8c97a8;
    --red: #f07a6c;
    --grid-minor-opacity: 0.6;
    --band-opacity: 0.2;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #14202f;
  --grid: #27405a;
  --ink: #dce6ee;
  --blue: #7fa8e0;
  --graphite: #8c97a8;
  --red: #f07a6c;
  --grid-minor-opacity: 0.6;
  --band-opacity: 0.2;
  color-scheme: dark;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.6;
  font-variant-numeric: lining-nums;
}

a {
  color: var(--blue);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
}
a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

h1,
h2 {
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
}

/* Üst ve alt bilgi */

.site-header,
main,
.site-footer {
  max-width: 72rem;
  margin: 0 auto;
  padding-inline: 1rem;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 1.1rem;
  border-bottom: 1px solid var(--grid);
  font-family: var(--sans);
  font-size: 0.95rem;
}

.site-name {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.site-nav a {
  color: var(--graphite);
  text-decoration: none;
}
.site-nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--red);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.4em;
}

.text-button,
.icon-button {
  font: inherit;
  color: var(--ink);
  background: none;
  border: 1px solid var(--grid);
  border-radius: 4px;
  cursor: pointer;
}
.text-button {
  padding: 0.2rem 0.6rem;
}
.icon-button {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  padding: 0;
}
.icon-button svg {
  width: 1.15rem;
  height: 1.15rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
}
.text-button:hover,
.icon-button:hover {
  border-color: var(--ink);
}

/* Açık temada ay (koyuya geç), koyu temada güneş (açığa geç) görünür */
.icon-sun {
  display: none;
}
:root[data-theme="dark"] .icon-sun {
  display: inline;
}
:root[data-theme="dark"] .icon-moon {
  display: none;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun {
    display: inline;
  }
  :root:not([data-theme="light"]) .icon-moon {
    display: none;
  }
}

.site-footer {
  margin-top: 4rem;
  padding-block: 1.5rem 2.5rem;
  border-top: 1px solid var(--grid);
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--graphite);
}

.footer-projects {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
}
.footer-projects a {
  color: var(--graphite);
}
.footer-projects a[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}
.footer-meta {
  margin: 0.8rem 0 0;
}
.footer-meta a {
  color: var(--graphite);
}

/* Hesaplayıcı */

.calculator {
  display: grid;
  gap: 2rem;
  padding-top: 2.5rem;
}

@media (min-width: 60rem) {
  .calculator {
    grid-template-columns: 21rem 1fr;
    gap: 3rem;
    align-items: start;
  }
}

h1 {
  font-size: clamp(2rem, 1.4rem + 2.4vw, 2.75rem);
  max-width: 14ch;
}

.intro {
  margin: 1rem 0 2rem;
  color: var(--graphite);
  max-width: 34rem;
}

.field-label {
  display: block;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.field {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  border-bottom: 2px solid var(--ink);
  max-width: 14rem;
}
.field:focus-within {
  border-bottom-color: var(--red);
}

.field input {
  width: 100%;
  min-width: 0;
  padding: 0.2rem 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 2rem;
  font-variant-numeric: tabular-nums;
}
.field input:focus {
  outline: none;
}

.unit {
  font-family: var(--sans);
  color: var(--graphite);
}

.hint,
.error {
  font-family: var(--sans);
  font-size: 0.9rem;
  margin: 0.45rem 0 0;
}
.hint {
  color: var(--graphite);
}
.error {
  color: var(--red);
  font-weight: 600;
}
.error:empty {
  display: none;
}

.result {
  margin-top: 2.2rem;
}
.result p {
  margin: 0;
}
.result-label {
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--graphite);
}
.result-value {
  font-size: clamp(3rem, 2.4rem + 2.4vw, 3.9rem);
  font-weight: 500;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
  margin-top: 0.15rem !important;
}
.result-interval {
  margin-top: 0.5rem !important;
  color: var(--red);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.result-note {
  margin-top: 0.3rem !important;
  color: var(--graphite);
  font-size: 1rem;
}
.warning {
  margin-top: 1rem !important;
  padding-left: 0.8rem;
  border-left: 3px solid var(--red);
  font-family: var(--sans);
  font-size: 0.95rem;
}

/* Grafik */

.chart {
  margin: 0;
  min-width: 0;
}

.chart svg {
  display: block;
  width: 100%;
  height: auto;
  font-family: var(--sans);
}

.chart [hidden] {
  display: none;
}
.chart .paper {
  fill: var(--paper);
}
.chart .grid-minor {
  stroke: var(--grid);
  stroke-width: 0.5;
  opacity: var(--grid-minor-opacity);
}
.chart .grid-major {
  stroke: var(--grid);
  stroke-width: 1;
}
.chart .band {
  fill: var(--blue);
  opacity: var(--band-opacity);
}
.chart .fit {
  stroke: var(--blue);
  stroke-width: 2.2;
}
.chart .dot {
  fill: var(--graphite);
  opacity: 0.75;
}
.chart .tick {
  fill: var(--graphite);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.chart .axis-title {
  fill: var(--ink);
  font-size: 13px;
  font-weight: 600;
}
.chart .you {
  fill: var(--red);
  stroke: var(--paper);
  stroke-width: 2.5;
}
.chart .leader {
  stroke: var(--red);
  stroke-width: 1.2;
  stroke-dasharray: 4 3;
}
.chart .bracket {
  fill: none;
  stroke: var(--red);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.3rem;
  margin-top: 0.6rem;
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--graphite);
}
.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
.swatch {
  display: inline-block;
  flex: none;
}
.swatch-dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--graphite);
}
.swatch-fit {
  width: 1.2rem;
  height: 2px;
  background: var(--blue);
}
.swatch-band {
  width: 1.2rem;
  height: 0.7rem;
  background: color-mix(in srgb, var(--blue) 22%, transparent);
}
.swatch-you {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--red);
}

/* Açıklamalar */

.notes {
  display: grid;
  gap: 2rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--grid);
}
@media (min-width: 60rem) {
  .notes {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}
.notes h2 {
  font-size: 1.5rem;
  margin-bottom: 0.8rem;
}
.notes p {
  margin: 0 0 0.9rem;
  max-width: 36rem;
}
.disclaimer {
  font-weight: 600;
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}

/* Model sayfası */

.model-page {
  padding-top: 2.5rem;
}
.model-page h1 {
  max-width: none;
}
.model-page > .intro {
  max-width: 44rem;
}

.table-scroll {
  overflow-x: auto;
  margin-top: 1rem;
}

/* Dönemin dergi tablosu: üstte kalın, başlık altında ve en altta ince çizgi */
.results {
  width: 100%;
  border-collapse: collapse;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font-variant-numeric: tabular-nums;
}
.results caption {
  caption-side: bottom;
  text-align: left;
  padding-top: 0.6rem;
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--graphite);
}
.results th,
.results td {
  padding: 0.55rem 0.9rem 0.55rem 0;
  text-align: left;
  font-weight: 400;
}
.results thead th {
  border-bottom: 1px solid var(--ink);
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 600;
}
.results .num {
  text-align: right;
  white-space: nowrap;
}
.results tbody tr + tr > * {
  border-top: 1px solid var(--grid);
}
/* Telefonda RMSE sütunu gizlenir; tablo yatay kaydırmadan sığar */
@media (max-width: 40rem) {
  .results .rmse {
    display: none;
  }
  .results {
    font-size: 1rem;
  }
}
.results .selected th {
  font-weight: 600;
}
.results .selected > * {
  color: var(--ink);
}
.results .baseline > * {
  color: var(--graphite);
  font-style: italic;
}
.tag {
  margin-left: 0.4rem;
  padding: 0 0.4rem;
  border: 1.5px solid var(--red);
  border-radius: 3px;
  color: var(--red);
  font-family: var(--sans);
  font-size: 0.8rem;
  font-style: normal;
  font-weight: 600;
  white-space: nowrap;
}

.model-section {
  margin-top: 3rem;
}
.model-section h2 {
  font-size: 1.5rem;
  margin-bottom: 0.8rem;
}
.model-section p {
  max-width: 44rem;
  margin: 0 0 0.9rem;
}
.residual-chart {
  margin-top: 1.2rem;
}

.card {
  display: grid;
  gap: 0.3rem 2rem;
  margin: 0;
  max-width: 50rem;
}
.card dt {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
}
.card dd {
  margin: 0 0 0.9rem;
}
@media (min-width: 40rem) {
  .card {
    grid-template-columns: 10rem 1fr;
  }
  .card dt {
    padding-top: 0.15rem;
  }
}

/* Dil değiştirici bir bağlantı: düğme görünümünde */
.site-nav .text-button {
  color: var(--ink);
  text-decoration: none;
}