/* ============================================================
   SLEDstack — placeholder site
   Brand: Deep Navy #0B1F3A, Burnished Gold #C8A24C,
          Strategic Teal #0F6E7C, Off-White #FAFAFA
   ============================================================ */

:root {
  --navy: #0B1F3A;
  --gold: #C8A24C;
  --teal: #0F6E7C;
  --off-white: #FAFAFA;
  --ink: #14233b;
  --muted: rgba(250, 250, 250, 0.75);

  --font-head: "Roboto Slab", Georgia, "Times New Roman", serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--off-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.01em;
  margin: 0;
}

a {
  color: var(--teal);
}

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 22px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  border: 0;
  border-radius: 8px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1;
  padding: 16px 26px;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
}

.btn--gold {
  background: var(--gold);
  color: var(--navy);
}

.btn--gold:hover {
  background: #d6b262;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(200, 162, 76, 0.35);
}

.btn:disabled {
  opacity: 0.6;
  cursor: default;
  transform: none;
  box-shadow: none;
}

/* ============ HERO ============ */
.hero {
  background: var(--navy);
  color: var(--off-white);
  padding: 72px 0 84px;
}

.hero__inner {
  max-width: 760px;
}

.wordmark {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.6rem, 9vw, 4.2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 28px;
}

.wordmark__sled {
  color: var(--gold);
}

.wordmark__stack {
  color: var(--teal);
}

.hero__tagline {
  font-size: clamp(1.7rem, 5.5vw, 2.7rem);
  line-height: 1.12;
  color: var(--off-white);
  margin-bottom: 20px;
}

.hero__subtagline {
  font-size: clamp(1rem, 2.6vw, 1.18rem);
  color: var(--muted);
  margin: 0 0 34px;
  max-width: 640px;
}

/* ---------- Waitlist form ---------- */
.waitlist {
  margin-bottom: 22px;
}

.waitlist__row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  max-width: 560px;
}

.waitlist__input {
  flex: 1 1 240px;
  min-width: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 16px 18px;
  border: 1px solid rgba(250, 250, 250, 0.25);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--off-white);
}

.waitlist__input::placeholder {
  color: rgba(250, 250, 250, 0.5);
}

.waitlist__input:focus {
  outline: none;
  border-color: var(--gold);
  background: rgba(255, 255, 255, 0.1);
}

.waitlist__row .btn {
  flex: 0 0 auto;
}

.waitlist__message {
  margin: 14px 0 0;
  font-size: 0.95rem;
  min-height: 1.2em;
}

.waitlist__message--success {
  color: var(--gold);
}

.waitlist__message--error {
  color: #ff9b8a;
}

.hero__attribution {
  font-size: 0.92rem;
  color: var(--muted);
  margin: 0;
  max-width: 600px;
}

.hero__attribution a {
  color: var(--gold);
}

/* ============ FEATURES ============ */
.features {
  background: var(--off-white);
  padding: 76px 0;
}

.features__heading {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  color: var(--navy);
  margin-bottom: 36px;
  text-align: center;
}

.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.card {
  background: #ffffff;
  border: 1px solid #ececec;
  border-top: 4px solid var(--gold);
  border-radius: 12px;
  padding: 30px 26px;
  box-shadow: 0 8px 28px rgba(11, 31, 58, 0.06);
}

.card__title {
  font-size: 1.25rem;
  color: var(--navy);
  margin-bottom: 12px;
  line-height: 1.2;
}

.card__body {
  margin: 0;
  color: #43505f;
  font-size: 1rem;
}

/* ============ CTA BAND ============ */
.cta {
  background: var(--navy);
  color: var(--off-white);
  padding: 76px 0;
}

.cta__inner {
  max-width: 720px;
  text-align: center;
}

.cta__headline {
  font-size: clamp(1.7rem, 5.5vw, 2.5rem);
  color: var(--off-white);
  margin-bottom: 14px;
  line-height: 1.14;
}

.cta__body {
  font-size: clamp(1.05rem, 3vw, 1.25rem);
  color: var(--muted);
  margin: 0 0 30px;
}

.cta__btn {
  font-size: 1.05rem;
}

/* ============ FOOTER ============ */
.footer {
  background: #07162b;
  color: var(--muted);
  padding: 34px 0;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  align-items: center;
  justify-content: space-between;
}

.footer__copy {
  margin: 0;
  font-size: 0.9rem;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer__links a {
  color: var(--gold);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer__links a:hover {
  text-decoration: underline;
}

/* ============ RESPONSIVE ============ */
@media (min-width: 720px) {
  .features__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 520px) {
  .waitlist__row .btn {
    width: 100%;
  }
}