/* =========================================================
   SOMOS DIGITAL — Site styles (home)
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--sd-black);
  color: var(--sd-off-white);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img { display: block; max-width: 100%; }

::selection { background: var(--sd-magenta); color: #fff; }

/* layout helpers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-pad-x);
  padding-right: var(--container-pad-x);
}
.section { padding-top: var(--section-pad-y); padding-bottom: var(--section-pad-y); }
.section-dark  { background: var(--sd-black); color: var(--sd-off-white); }
.section-light { background: var(--sd-off-white); color: var(--sd-black); }
.section-grey  { background: var(--sd-grey-bg); color: var(--sd-black); }
.section-ink   { background: #050505; color: var(--sd-off-white); }

/* typography helpers */
h1, h2, h3, h4, h5, p, ul, ol { margin: 0; }
p { line-height: var(--lh-loose); }

.eyebrow {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: var(--sd-grey-text);
}
.eyebrow.grad {
  background: var(--sd-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.grad-text {
  background: var(--sd-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.grad-line {
  height: 2px;
  width: 100%;
  border: 0;
  background: var(--sd-gradient);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  font-size: 15px;
  font-weight: var(--fw-semibold);
  padding: 14px 22px;
  border-radius: var(--r-sm);
  border: 0;
  white-space: nowrap;
  transition: transform var(--dur-base) var(--ease-out),
              filter var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}
.btn-lg { padding: 18px 28px; font-size: 16px; }
.btn-primary { background: var(--sd-gradient); color: #fff; }
.btn-primary:hover { transform: scale(1.02); filter: brightness(1.06); }
.btn-secondary-dark {
  background: transparent;
  color: var(--sd-off-white);
  border: 1.5px solid rgba(255,255,255,0.35);
}
.btn-secondary-dark:hover { background: var(--sd-off-white); color: var(--sd-black); border-color: var(--sd-off-white); }
.btn-secondary-light {
  background: transparent;
  color: var(--sd-black);
  border: 1.5px solid rgba(10,10,10,0.25);
}
.btn-secondary-light:hover { background: var(--sd-black); color: var(--sd-off-white); border-color: var(--sd-black); }
.btn-ghost {
  background: transparent;
  padding: 6px 0;
  color: inherit;
}
.btn:active { transform: scale(0.98); }
.btn .arrow { display: inline-block; transition: transform var(--dur-base) var(--ease-out); }
.btn:hover .arrow { transform: translateX(3px); }

/* Inline link with arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: var(--fw-semibold);
  color: inherit;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.link-arrow .arrow { display: inline-block; transition: transform var(--dur-base) var(--ease-out); }
.link-arrow:hover .arrow { transform: translateX(4px); }
.link-arrow.grad-text:hover { filter: brightness(1.1); }

/* Card primitives */
.card-light {
  background: #fff;
  border: 1px solid var(--sd-line-light);
  border-radius: var(--r-lg);
  padding: 32px;
  transition: transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}
.card-light:hover { box-shadow: var(--shadow-2); }
.card-dark {
  background: #141414;
  border: 1px solid var(--sd-line-dark);
  border-radius: var(--r-lg);
  padding: 32px;
  transition: background var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.card-dark:hover { background: #1A1A1A; border-color: rgba(255,255,255,0.18); }

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* Mobile */
@media (max-width: 900px) {
  .container { padding-left: 24px; padding-right: 24px; }
  .section { padding-top: 80px; padding-bottom: 80px; }
}

/* Numbered section cards (01, 02, 03...) tighten on small screens.
   Three things going on:
   1. The number itself shrinks to 48px and the gap to its label tightens.
   2. Any *rounded card* (inline `border-radius`) that directly contains a
      numbered heading gets reduced padding and a relaxed min-height —
      this targets perf/Problem, perf/Method, ic/Idea, ic/WhyDifferent
      cards but not the IC phase-section headers (which have no
      border-radius on the wrapper div).
   3. ic/Idea's h3 has `margin-top: auto` (flexbox push-to-bottom on a 280px
      min-height card). Overriding to 0 collapses the card to its natural
      content height on mobile.                                            */
@media (max-width: 768px) {
  .sd-num-xl {
    font-size: 48px !important;
    line-height: 1 !important;
    margin-top: 0 !important;
    margin-bottom: 8px !important;
  }
  *:has(> .sd-num-xl)[style*="border-radius"] {
    padding: 24px !important;
    min-height: 0 !important;
  }
  *:has(> .sd-num-xl) > h3 {
    margin-top: 0 !important;
  }
}