/* ── Start a Project — intake flow ── */
.zk-start-body {
  margin: 0;
  min-height: 100vh;
  /* themable tokens (light defaults) */
  --zk-bg: var(--cream);
  --zk-surface: var(--white);
  --zk-text: var(--black);
  --zk-soft: var(--gray-700);
  --zk-muted: var(--gray-500);
  --zk-faint: var(--gray-400);
  --zk-border: var(--gray-200);
  --zk-border-strong: var(--gray-400);
  --zk-btn-bg: var(--black);
  --zk-btn-text: #FAFAFA;
  --zk-btn-hover-bg: var(--gray-900);
  --zk-btn-hover-text: #fff;
  --zk-progress-track: rgba(10, 10, 10, 0.08);
  --zk-progress-fill: var(--black);
  --zk-checked-bg: var(--black);
  --zk-checked-text: #FAFAFA;
  --zk-marker-bg: #FAFAFA;
  --zk-marker-check: %230A0A0A;
  --zk-focus-ring: rgba(10, 10, 10, 0.55);
  --zk-error: #B4232A;
  background: var(--zk-bg);
  transition: background var(--transition);
}

.zk-start-body[data-theme="dark"] {
  --zk-bg: #0E0E11;
  --zk-surface: #1A1A1E;
  --zk-text: #F2F2EF;
  --zk-soft: #C6C6C2;
  --zk-muted: #9A9A9A;
  --zk-faint: #7A7A7A;
  --zk-border: #2C2C31;
  --zk-border-strong: #45454C;
  --zk-btn-bg: #F2F2EF;
  --zk-btn-text: #0A0A0A;
  --zk-btn-hover-bg: #ffffff;
  --zk-btn-hover-text: #0A0A0A;
  --zk-progress-track: rgba(255, 255, 255, 0.12);
  --zk-progress-fill: #F2F2EF;
  --zk-checked-bg: #F2F2EF;
  --zk-checked-text: #0A0A0A;
  --zk-marker-bg: #0A0A0A;
  --zk-marker-check: %23F2F2EF;
  --zk-focus-ring: rgba(255, 255, 255, 0.55);
  --zk-error: #FF7A7A;
}

.zk-start {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.zk-start__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem clamp(1.25rem, 4vw, 2.5rem);
}
.zk-start__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--zk-text);
  text-decoration: none;
}
.zk-start__bar-right { display: flex; align-items: center; gap: 1rem; }
.zk-start__email { font-family: var(--font-body); font-size: 0.85rem; color: var(--zk-muted); text-decoration: none; }
.zk-start__email span { color: var(--zk-text); border-bottom: 1px solid currentColor; }
.zk-start__email:hover { color: var(--zk-text); }

/* theme toggle */
.zk-start .zk-start__theme {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.3rem;
  height: 2.3rem;
  padding: 0;
  border: 1px solid var(--zk-border);
  border-radius: 50%;
  background: var(--zk-surface);
  color: var(--zk-text);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}
.zk-start .zk-start__theme:hover,
.zk-start .zk-start__theme:focus { border-color: var(--zk-border-strong); color: var(--zk-text); background: var(--zk-surface); outline: none; }
.zk-start .zk-start__theme:focus-visible { outline: 2px solid var(--zk-focus-ring); outline-offset: 2px; }
.zk-start__theme svg { width: 1.15rem; height: 1.15rem; display: block; }
.zk-start__theme .zk-icon-sun { display: none; }
.zk-start-body[data-theme="dark"] .zk-start__theme .zk-icon-sun { display: block; }
.zk-start-body[data-theme="dark"] .zk-start__theme .zk-icon-moon { display: none; }

.zk-start__progress { height: 3px; background: var(--zk-progress-track); }
.zk-start__progress-fill {
  display: block;
  height: 100%;
  width: 11%;
  background: var(--zk-progress-fill);
  transition: width 0.45s var(--ease);
}

.zk-start__main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1.5rem, 5vw, 3rem) clamp(1.25rem, 5vw, 2.5rem) clamp(6.5rem, 12vw, 8rem);
}
#zkStartForm, .zk-done { width: 100%; max-width: 640px; }

.zk-step__kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--zk-faint);
  margin-bottom: 0.9rem;
}
.zk-step__q {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--zk-text);
}
.zk-step__hint { margin-top: 0.7rem; color: var(--zk-muted); font-size: 1rem; line-height: 1.5; }
.zk-step__error { margin-top: 0.85rem; color: var(--zk-error); font-size: 0.9rem; }
.zk-hp { position: absolute; left: -9999px; top: -9999px; width: 1px; height: 1px; overflow: hidden; }
.zk-start__consent { margin-top: 1.4rem; color: var(--zk-faint); font-size: 0.85rem; line-height: 1.5; }
.zk-start__consent a { color: var(--zk-muted); text-decoration: underline; text-underline-offset: 2px; }
.zk-start__consent a:hover { color: var(--zk-text); }

/* the hidden attribute must win over the buttons' display:inline-flex */
.zk-start [hidden] { display: none !important; }

/* animated step entrance */
.zk-step[hidden] { display: none; }
.zk-step { animation: zk-step-in 0.4s var(--ease); }
@keyframes zk-step-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* options */
.zk-opts { display: flex; flex-direction: column; gap: 0.6rem; margin-top: 1.6rem; }
.zk-opts--checks { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.zk-opt {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.95rem 1.1rem;
  border: 1px solid var(--zk-border);
  border-radius: 0.6rem;
  background: var(--zk-surface);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}
.zk-opt:hover { border-color: var(--zk-border-strong); }
.zk-opt input { position: absolute; opacity: 0; pointer-events: none; }
.zk-opt__label { font-size: 1rem; font-weight: 500; color: var(--zk-text); }
.zk-opt::before {
  content: "";
  width: 1.15rem; height: 1.15rem;
  flex: 0 0 auto;
  border: 1.5px solid var(--zk-border-strong);
  border-radius: 50%;
  transition: var(--transition);
}
.zk-opts--checks .zk-opt::before,
.zk-opt:has(input[type="checkbox"])::before { border-radius: 0.3rem; }
.zk-opt:has(input:checked) { border-color: var(--zk-checked-bg); background: var(--zk-checked-bg); }
.zk-opt:has(input:checked) .zk-opt__label { color: var(--zk-checked-text); }
.zk-opt:has(input:checked)::before {
  border-color: var(--zk-marker-bg);
  background: var(--zk-marker-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230A0A0A' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 0.7rem no-repeat;
}
.zk-start-body[data-theme="dark"] .zk-opt:has(input:checked)::before {
  background: var(--zk-marker-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23F2F2EF' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 0.7rem no-repeat;
}

/* fields */
.zk-field { display: flex; flex-direction: column; gap: 0.4rem; margin-top: 1.4rem; }
.zk-field label { font-size: 0.92rem; font-weight: 600; color: var(--zk-text); }
.zk-field__opt { font-weight: 400; color: var(--zk-faint); }
.zk-field--loose { margin-top: 1.7rem; }

#zkStartForm input[type="text"],
#zkStartForm input[type="email"],
#zkStartForm textarea,
#zkStartForm select {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--zk-text);
  padding: 0.8rem 0.95rem;
  border: 1px solid var(--zk-border);
  border-radius: 0.5rem;
  background: var(--zk-surface);
  transition: border-color var(--transition), background var(--transition), color var(--transition);
  -webkit-appearance: none;
  appearance: none;
}
#zkStartForm input::placeholder, #zkStartForm textarea::placeholder { color: var(--zk-faint); }
#zkStartForm textarea { resize: vertical; line-height: 1.5; }
#zkStartForm input:focus,
#zkStartForm textarea:focus,
#zkStartForm select:focus { outline: none; border-color: var(--zk-text); }
#zkDescription { margin-top: 1.6rem; }

#zkStartForm select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238A8A8A' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  background-size: 0.85rem;
  padding-right: 2.4rem;
}

.zk-grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.2rem 1.25rem; margin-top: 1.4rem; }
.zk-grid2 .zk-field { margin-top: 0.7rem; }

/* review */
.zk-review { margin-top: 1.6rem; display: grid; gap: 0; }
.zk-review > div { padding: 0.85rem 0; border-bottom: 1px solid var(--zk-border); }
.zk-review > div:first-child { padding-top: 0; }
.zk-review dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--zk-faint);
  margin-bottom: 0.35rem;
}
.zk-review dd { font-size: 0.98rem; color: var(--zk-text); line-height: 1.5; white-space: pre-wrap; }

/* nav */
.zk-start__nav {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
  padding: 1rem clamp(1.25rem, 5vw, 2.5rem);
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
  background: linear-gradient(transparent, var(--zk-bg) 34%);
}
/* .zk-start scope raises specificity above the parent reset's [type=button]/button rules */
.zk-start .zk-start__back {
  margin-right: auto;
  background: none;
  border: none;
  color: var(--zk-muted);
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0.5rem 0;
  -webkit-tap-highlight-color: transparent;
  transition: color var(--transition);
}
.zk-start .zk-start__back:hover,
.zk-start .zk-start__back:focus { background: none; border: none; color: var(--zk-text); outline: none; }
.zk-start__count { font-family: var(--font-mono); font-size: 0.78rem; color: var(--zk-faint); }
.zk-start .zk-start__next,
.zk-start .zk-start__submit {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.85rem 1.6rem;
  background: var(--zk-btn-bg);
  color: var(--zk-btn-text);
  border: 1px solid var(--zk-btn-bg);
  border-radius: 0.5rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
/* hover: text gets brighter — never the reset's #c36 */
.zk-start .zk-start__next:hover, .zk-start .zk-start__next:focus,
.zk-start .zk-start__submit:hover, .zk-start .zk-start__submit:focus {
  background: var(--zk-btn-hover-bg);
  color: var(--zk-btn-hover-text);
  border-color: var(--zk-btn-hover-bg);
  outline: none;
}
.zk-start .zk-start__next:focus-visible,
.zk-start .zk-start__back:focus-visible {
  outline: 2px solid var(--zk-focus-ring);
  outline-offset: 3px;
}

/* confirmation */
.zk-done__text { margin-top: 1rem; font-size: 1.05rem; color: var(--zk-soft); line-height: 1.6; max-width: 40rem; }
.zk-done__meta { margin-top: 1rem; font-family: var(--font-mono); font-size: 0.82rem; color: var(--zk-faint); }
.zk-done .zk-start__next { margin-top: 2rem; }

@media (max-width: 560px) {
  .zk-opts--checks { grid-template-columns: 1fr; }
  .zk-grid2 { grid-template-columns: 1fr; }
  .zk-start__email span { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .zk-step { animation: none; }
  .zk-start__progress-fill { transition: none; }
}