/* catchallchecker.com — terminal aesthetic, mobile first */

:root {
  --bg: #0a0f0d;
  --bg_panel: #0d1611;
  --bg_deep: #060a08;
  --line: #1c2b23;
  --line_soft: #14201a;
  --green: #10b981;
  --green_hi: #34d399;
  --green_dim: rgba(16, 185, 129, 0.14);
  --amber: #f59e0b;
  --red: #ef4444;
  --grey: #8b9893;
  --txt: #c8d6cf;
  --txt_dim: #8fa39a;
  --mono_disp: "JetBrains Mono", monospace;
  --mono_body: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  background: var(--bg);
  color: var(--txt);
  font-family: var(--mono_body);
  font-size: 0.92rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* faint CRT scanlines */
.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 3px,
    rgba(0, 0, 0, 0.12) 3px,
    rgba(0, 0, 0, 0.12) 4px
  );
  opacity: 0.5;
}

a { color: var(--green); text-decoration: none; }
a:hover, a:focus-visible { color: var(--green_hi); text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible,
summary:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }

code {
  font-family: var(--mono_disp);
  background: var(--green_dim);
  color: var(--green_hi);
  padding: 0 0.3em;
  border-radius: 2px;
  font-size: 0.92em;
}

.green_t { color: var(--green_hi); }
.amber_t { color: var(--amber); }
.red_t { color: var(--red); }
.grey_t { color: var(--grey); }

.vis_hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ── top bar ─────────────────────────────────────── */
.top_bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg_deep);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  font-family: var(--mono_disp);
  font-weight: 800;
  font-size: 1rem;
  color: var(--txt);
  letter-spacing: 0.02em;
}
.brand:hover { text-decoration: none; color: var(--green_hi); }
.brand_prompt { color: var(--green); }

.top_nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.9rem;
  font-size: 0.8rem;
  margin-left: auto;
}
.top_nav a { color: var(--txt_dim); }
.top_nav a:hover { color: var(--green_hi); text-decoration: none; }
.nav_signup { color: var(--green) !important; font-weight: 700; }

/* ── hero ────────────────────────────────────────── */
main { max-width: 60rem; margin: 0 auto; padding: 0 1rem; }

.hero { padding: 3rem 0 2.5rem; }

.hero_kicker {
  color: var(--txt_dim);
  font-size: 0.85rem;
  margin-bottom: 0.6rem;
}

h1 {
  font-family: var(--mono_disp);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 3.2rem);
  letter-spacing: -0.02em;
  color: #e8f3ee;
  margin-bottom: 0.9rem;
}
h1::after { content: "_"; color: var(--green); animation: cursor_blink 1.1s steps(1) infinite; }
@keyframes cursor_blink { 50% { opacity: 0; } }

.hero_sub { max-width: 46rem; color: var(--txt); margin-bottom: 2rem; }

.hero_under {
  margin-top: 1rem;
  font-size: 0.78rem;
  color: var(--txt_dim);
  letter-spacing: 0.02em;
}

/* ── terminal window ─────────────────────────────── */
.term_window {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg_deep);
  box-shadow: 0 0 0 1px rgba(16, 185, 129, 0.06), 0 18px 50px rgba(0, 0, 0, 0.55);
  overflow: hidden;
}

.term_head {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.9rem;
  background: var(--bg_panel);
  border-bottom: 1px solid var(--line);
}
.term_dot { width: 11px; height: 11px; border-radius: 50%; }
.d_r { background: #f87171; } .d_y { background: #fbbf24; } .d_g { background: #34d399; }
.term_title {
  margin-left: 0.6rem;
  font-size: 0.74rem;
  color: var(--txt_dim);
  font-family: var(--mono_disp);
}

.term_body { padding: 1rem 1rem 1.2rem; }
.term_note { color: var(--txt_dim); font-size: 0.8rem; }
.term_note + .term_note { margin-bottom: 0.9rem; }

.cmd_form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0.4rem 0 0.6rem;
}
.cmd_prompt {
  font-family: var(--mono_disp);
  color: var(--green);
  font-weight: 700;
  white-space: nowrap;
}
.cmd_form input {
  flex: 1 1 12rem;
  min-width: 0;
  background: transparent;
  border: none;
  border-bottom: 1px dashed var(--line);
  color: var(--green_hi);
  font-family: var(--mono_disp);
  font-size: 0.95rem;
  padding: 0.35rem 0.2rem;
  caret-color: var(--green);
}
.cmd_form input::placeholder { color: #3c5247; }
.cmd_form input:focus { outline: none; border-bottom-color: var(--green); }

.cmd_form button {
  font-family: var(--mono_disp);
  font-weight: 700;
  font-size: 0.85rem;
  color: #04130c;
  background: var(--green);
  border: none;
  border-radius: 3px;
  padding: 0.5rem 1.1rem;
  cursor: pointer;
}
.cmd_form button:hover { background: var(--green_hi); }
.cmd_form button:disabled { opacity: 0.45; cursor: wait; }

/* terminal output */
.term_out { font-size: 0.85rem; }
.out_line { white-space: pre-wrap; word-break: break-word; }
.out_echo { color: var(--txt_dim); margin-top: 0.4rem; }
.out_pend .mk { color: var(--amber); }
.out_ok .mk { color: var(--green); }
.out_err { color: var(--red); }
.out_err .mk { color: var(--red); }

.out_result {
  margin: 0.8rem 0 0.4rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  background: var(--bg_panel);
  border-radius: 3px;
  padding: 0.8rem 1rem;
  display: grid;
  grid-template-columns: 9.5rem 1fr;
  gap: 0.15rem 0.8rem;
}
.out_result.r_undeliverable { border-left-color: var(--red); }
.out_result.r_risky { border-left-color: var(--amber); }
.out_result.r_unknown { border-left-color: var(--grey); }

.out_k { color: var(--txt_dim); }
.out_v { color: var(--txt); word-break: break-all; }

.status_v { font-family: var(--mono_disp); font-weight: 800; letter-spacing: 0.06em; }
.s_deliverable { color: var(--green_hi); }
.s_undeliverable { color: var(--red); }
.s_risky { color: var(--amber); }
.s_unknown { color: var(--grey); }

.flag_chip {
  display: inline-block;
  margin: 0.1rem 0.35rem 0.1rem 0;
  padding: 0 0.4rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--green_dim);
  color: var(--green_hi);
  font-size: 0.78rem;
}

.out_meta { color: var(--txt_dim); font-size: 0.78rem; margin-top: 0.4rem; }

.out_cta {
  display: inline-block;
  margin-top: 0.7rem;
  font-family: var(--mono_disp);
  font-weight: 700;
  color: #04130c;
  background: var(--green);
  padding: 0.5rem 1rem;
  border-radius: 3px;
}
.out_cta:hover { background: var(--green_hi); color: #04130c; text-decoration: none; }

@media (max-width: 520px) {
  .out_result { grid-template-columns: 1fr; }
  .out_k { margin-top: 0.35rem; }
}

/* ── sections ────────────────────────────────────── */
.sec { padding: 2.6rem 0 0.4rem; }

.sec_rule {
  border-top: 1px dashed var(--line);
  margin-bottom: 2.2rem;
  position: relative;
}
.sec_rule::before {
  content: "////";
  position: absolute;
  top: -0.75em;
  left: 0;
  background: var(--bg);
  padding-right: 0.6rem;
  color: var(--line);
  font-family: var(--mono_disp);
  font-size: 0.8rem;
}

h2 {
  font-family: var(--mono_disp);
  font-weight: 700;
  font-size: clamp(1.2rem, 3.4vw, 1.6rem);
  color: #e8f3ee;
  margin-bottom: 1.1rem;
  letter-spacing: -0.01em;
}
.sec_no {
  color: var(--green);
  margin-right: 0.55rem;
}
.sec_no::after { content: " /"; color: var(--line); }

.sec p { margin-bottom: 1rem; max-width: 48rem; }
.sec em { color: var(--green_hi); font-style: normal; }

.res_list { list-style: none; margin: 0 0 1rem; max-width: 48rem; }
.res_list li {
  padding-left: 1.4rem;
  position: relative;
  margin-bottom: 0.8rem;
}
.res_list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--green);
}

/* figures */
.smtp_fig, .ascii_fig {
  font-family: var(--mono_disp);
  font-size: 0.78rem;
  line-height: 1.75;
  background: var(--bg_deep);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1rem 1.2rem;
  margin: 1.2rem 0 1.4rem;
  overflow-x: auto;
  color: var(--txt_dim);
}
.fig_c { color: var(--green_hi); }
.fig_s { color: var(--txt_dim); }
.fig_warn { color: var(--amber); }

/* stack grid */
.stack_grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.4rem 0;
}
@media (min-width: 680px) { .stack_grid { grid-template-columns: 1fr 1fr; } }

.stack_card {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg_panel);
  padding: 1.1rem 1.2rem;
}
.stack_card h3 {
  font-family: var(--mono_disp);
  font-size: 0.95rem;
  color: var(--green_hi);
  margin-bottom: 0.5rem;
}
.stack_card h3::before { content: "+ "; color: var(--line); }
.stack_card p { font-size: 0.85rem; color: var(--txt_dim); margin: 0; }

/* pricing */
.price_table {
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
  margin: 1.4rem 0;
  font-size: 0.85rem;
}
.price_row {
  display: grid;
  grid-template-columns: minmax(8rem, 2fr) 1fr 1fr 1fr;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--line_soft);
  align-items: baseline;
}
.price_row:last-child { border-bottom: none; }
.price_head {
  background: var(--bg_panel);
  color: var(--txt_dim);
  font-family: var(--mono_disp);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}
.price_pop {
  background: var(--green_dim);
  border-left: 3px solid var(--green);
}
.price_pop em { color: var(--green_hi); font-style: normal; font-size: 0.75rem; }
.price_row span:nth-child(3) { color: var(--green_hi); font-weight: 700; }

@media (max-width: 480px) {
  .price_row { grid-template-columns: minmax(6rem, 2fr) 1fr 1fr; }
  .price_row span:nth-child(4) { display: none; }
}

.price_cta_line { margin-top: 1.4rem; }

.btn_solid {
  display: inline-block;
  font-family: var(--mono_disp);
  font-weight: 700;
  color: #04130c;
  background: var(--green);
  padding: 0.65rem 1.3rem;
  border-radius: 3px;
}
.btn_solid:hover { background: var(--green_hi); color: #04130c; text-decoration: none; }
.btn_big { font-size: 1rem; padding: 0.85rem 1.7rem; }

/* faq */
.faq_item {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg_panel);
  margin-bottom: 0.7rem;
  max-width: 48rem;
}
.faq_item summary {
  cursor: pointer;
  padding: 0.8rem 1rem;
  font-family: var(--mono_disp);
  font-weight: 500;
  color: var(--txt);
  list-style: none;
}
.faq_item summary::-webkit-details-marker { display: none; }
.faq_item summary::before { content: "[+] "; color: var(--green); }
.faq_item[open] summary::before { content: "[-] "; }
.faq_item p { padding: 0 1rem 1rem; color: var(--txt_dim); font-size: 0.87rem; margin: 0; }

/* final cta */
.cta_final { text-align: center; padding-bottom: 3rem; }
.cta_line { color: var(--txt_dim); margin-bottom: 1.2rem; }

/* ── footer ──────────────────────────────────────── */
.site_footer {
  border-top: 1px solid var(--line);
  background: var(--bg_deep);
  padding: 2.2rem 1rem 2.6rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.8rem;
  max-width: 60rem;
  margin: 2rem auto 0;
}
@media (min-width: 680px) { .site_footer { grid-template-columns: 1fr 1fr; } }

.foot_head {
  font-family: var(--mono_disp);
  color: var(--txt_dim);
  font-size: 0.78rem;
  margin-bottom: 0.7rem;
}
.foot_col ul { list-style: none; margin-bottom: 1.4rem; }
.foot_col li { margin-bottom: 0.35rem; font-size: 0.85rem; }
.foot_col a { color: var(--txt); }
.foot_col a:hover { color: var(--green_hi); }

.foot_copy {
  grid-column: 1 / -1;
  color: var(--txt_dim);
  font-size: 0.78rem;
  border-top: 1px dashed var(--line_soft);
  padding-top: 1.2rem;
}

/* ── legal pages ─────────────────────────────────── */
.legal_main { max-width: 46rem; margin: 0 auto; padding: 2.5rem 1rem 4rem; }
.legal_main h1 { font-size: clamp(1.6rem, 5vw, 2.2rem); }
.legal_main h1::after { content: none; }
.legal_main h2 { font-size: 1.05rem; margin-top: 2rem; }
.legal_main p, .legal_main li { color: var(--txt_dim); font-size: 0.88rem; margin-bottom: 0.8rem; }
.legal_main ul { margin: 0 0 1rem 1.4rem; }
.legal_updated { color: var(--grey); font-size: 0.78rem; margin-bottom: 2rem; }