/* Cover My Sins — site stylesheet */
/* Register office. Monospace. Hairline rules. Nothing rounded. */

:root {
  --paper: #F7F5F0;
  --ink: #000;
  --rule: #000;
  --muted: #6B6B6B;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

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

html {
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1.5;
  background: var(--paper);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0 auto;
  padding: 1.25rem 1rem 2rem;
  max-width: 640px;
}

/* ---------- Typography ---------- */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--mono);
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 2rem 0 1rem;
  line-height: 1.25;
}

h1 { font-size: 1.25rem; }
h2 { font-size: 1.0625rem; }
h3 { font-size: 1rem; }
h4, h5, h6 { font-size: 0.9375rem; }

p {
  margin: 0 0 1rem;
}

a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover,
a:focus {
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  outline: none;
}

small {
  font-size: 0.8125rem;
}

strong, b {
  font-weight: 700;
}

em, i {
  font-style: italic;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 1.5rem 0;
}

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

/* ---------- Structural rules ---------- */

header {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

footer {
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
  margin-top: 2.5rem;
  font-size: 0.8125rem;
  color: var(--muted);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.9375rem;
  line-height: 1;
  padding: 0.75rem 1rem;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 0;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}

.btn:hover,
.btn:focus {
  background: var(--ink);
  color: var(--paper);
  outline: none;
}

.btn:active {
  background: var(--ink);
  color: var(--paper);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  color: var(--muted);
  border-color: var(--muted);
  background: var(--paper);
  cursor: not-allowed;
}

.btn--block {
  display: block;
  width: 100%;
  text-align: center;
}

/* ---------- Form controls ---------- */

label {
  display: block;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.375rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="search"],
select,
textarea {
  display: block;
  width: 100%;
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 1.4;
  padding: 0.625rem 0.75rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 0;
  margin-bottom: 1rem;
  -webkit-appearance: none;
  appearance: none;
}

textarea {
  min-height: 6rem;
  resize: vertical;
}

select {
  padding-right: 2rem;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%),
                    linear-gradient(-45deg, transparent 50%, var(--ink) 50%);
  background-position: calc(100% - 14px) 55%, calc(100% - 9px) 55%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--ink);
  outline-offset: -2px;
}

input[type="checkbox"],
input[type="radio"] {
  -webkit-appearance: none;
  appearance: none;
  width: 1rem;
  height: 1rem;
  border: 1px solid var(--ink);
  background: var(--paper);
  border-radius: 0;
  vertical-align: -2px;
  margin: 0 0.5rem 0 0;
  cursor: pointer;
}

input[type="radio"] {
  border-radius: 50%;
}

input[type="checkbox"]:checked {
  background: var(--ink);
}

input[type="radio"]:checked {
  background: var(--paper);
  box-shadow: inset 0 0 0 3px var(--ink);
}

::placeholder {
  color: var(--muted);
  opacity: 1;
}

fieldset {
  border: 1px solid var(--rule);
  border-radius: 0;
  padding: 1rem;
  margin: 0 0 1.5rem;
}

legend {
  padding: 0 0.5rem;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------- Table ---------- */

table {
  width: 100%;
  border-collapse: collapse;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-size: 0.9375rem;
  margin: 1rem 0 1.5rem;
}

th,
td {
  text-align: left;
  padding: 0.625rem 0.5rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

tr:last-child td {
  border-bottom: 0;
}

th {
  font-weight: 400;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

caption {
  text-align: left;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding-bottom: 0.5rem;
  color: var(--muted);
}

/* ---------- Larger screens ---------- */

@media (min-width: 640px) {
  html { font-size: 17px; }
  body { padding: 2rem 1.5rem 3rem; }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.1875rem; }
}

@media (min-width: 960px) {
  body {
    padding: 3rem 2rem 4rem;
    max-width: 720px;
  }
}