:root {
  --color-black: #000000;
  --color-white: #ffffff;
  --color-gray: #e5e5e5;
  --color-gray-deep: #696969;
  --color-gray-soft: #f5f5f5;
  --shadow-soft: 0 24px 60px rgba(0, 0, 0, 0.08);
  --shadow-strong: 0 20px 48px rgba(0, 0, 0, 0.14);
  --radius-large: 28px;
  --radius-medium: 18px;
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", sans-serif;
  color: var(--color-black);
  background:
    radial-gradient(circle at top left, rgba(0, 0, 0, 0.07), transparent 26%),
    linear-gradient(180deg, #ffffff 0%, #f7f7f7 100%);
}

button,
input,
textarea {
  font: inherit;
}

.contact-shell {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.35fr 0.75fr;
  gap: 1rem;
  padding: 2rem;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-large);
  background:
    linear-gradient(135deg, rgba(0, 0, 0, 0.96), rgba(0, 0, 0, 0.8)),
    var(--color-black);
  color: var(--color-white);
  box-shadow: var(--shadow-strong);
}

.eyebrow,
.panel-kicker,
.aside-label,
.panel-note,
.response-kicker {
  margin: 0;
  font-family: "Fira Code", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow,
.aside-label {
  color: rgba(255, 255, 255, 0.72);
}

.hero h1,
.contact-panel h2,
.response-panel h3 {
  margin: 0;
  font-family: "Poppins", sans-serif;
  line-height: 1;
  letter-spacing: -0.04em;
}

.hero h1 {
  max-width: 9ch;
  margin-top: 0.8rem;
  font-size: clamp(3rem, 7vw, 5.4rem);
}

.intro {
  max-width: 42rem;
  margin: 1.3rem 0 0;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
}

.hero-aside {
  align-self: end;
  padding: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.06);
}

.aside-list {
  margin: 0.85rem 0 0;
  padding-left: 1.1rem;
  line-height: 1.9;
}

.contact-panel {
  margin-top: 1.5rem;
  padding: 2rem;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-large);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-soft);
}

.panel-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
}

.contact-panel h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

.panel-note {
  color: var(--color-gray-deep);
}

.contact-form {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.field {
  display: grid;
  gap: 0.55rem;
}

.field-wide {
  grid-column: 1 / -1;
}

.field-label {
  font-weight: 600;
}

input,
textarea {
  width: 100%;
  padding: 0.95rem 1rem;
  border: 1px solid var(--color-gray);
  border-radius: 16px;
  background: var(--color-white);
  color: var(--color-black);
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-black);
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.08);
}

textarea {
  min-height: 180px;
  resize: vertical;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  grid-column: 1 / -1;
  margin-top: 0.5rem;
}

.submit-button {
  padding: 0.95rem 1.25rem;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 999px;
  background: var(--color-black);
  color: var(--color-white);
  cursor: pointer;
  transition:
    transform 180ms ease,
    opacity 180ms ease,
    box-shadow 180ms ease;
}

.submit-button:hover,
.submit-button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.submit-button:disabled {
  opacity: 0.72;
  cursor: wait;
}

.status-line {
  margin: 0;
  color: var(--color-gray-deep);
}

.response-panel {
  margin-top: 1.5rem;
  padding: 1.4rem;
  border: 1px solid var(--color-gray);
  border-radius: 22px;
  background:
    linear-gradient(135deg, rgba(0, 0, 0, 0.03), transparent 44%),
    var(--color-white);
}

.response-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
}

.response-panel h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.response-output {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-gray);
  line-height: 1.8;
  color: var(--color-black);
  white-space: pre-wrap;
}

.response-output p {
  margin: 0;
}

@media (max-width: 840px) {
  .hero {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .contact-shell {
    width: min(calc(100% - 1.25rem), var(--max-width));
    padding-top: 1rem;
  }

  .hero,
  .contact-panel {
    padding: 1.4rem;
  }

  .panel-header,
  .form-actions {
    align-items: start;
    flex-direction: column;
  }
}