/* ============================================================
   StudioBlank — ultra-minimal, flat, monochrome, sharp edges.
   No shadows. No border-radius. Transitions <= 200ms.
   ============================================================ */

:root {
  /* Color */
  --color-primary: #0A0A0A;   /* text, actions */
  --color-secondary: #FAFAFA; /* backgrounds, inverse surfaces */
  --color-tertiary: #D4D4D8;  /* dividers, borders */
  --surface-base: #FAFAFA;
  --surface-card: #FFFFFF;
  --border-hover: #A1A1AA;
  --color-success: #16A34A;
  --color-error: #DC2626;
  --color-info: #71717A;

  /* Spacing (base unit 16px) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-8: 96px;
  --space-10: 128px;

  /* Type */
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --transition: 160ms ease;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--color-primary);
  background: var(--surface-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Accessibility ----------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: var(--color-secondary);
  padding: var(--space-2) var(--space-3);
  font: 400 14px/1 var(--font-body);
  z-index: 10;
}
.skip-link:focus {
  left: var(--space-3);
  top: var(--space-3);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Layout ------------------------------------------------------------------ */
.page {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
}

.site-header {
  flex: 0 0 auto;
}

.wordmark {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
}

/* Hero -------------------------------------------------------------------- */
.hero {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 640px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-8) 0;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-info);
  margin-bottom: var(--space-4);
}

.hero-title {
  font-weight: 700;
  font-size: clamp(40px, 9vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.hero-sub {
  font-weight: 300;
  font-size: clamp(16px, 2.4vw, 18px);
  line-height: 1.65;
  max-width: 46ch;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}

/* Form -------------------------------------------------------------------- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 420px;
  width: 100%;
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-info);
  font-weight: 500;
}

.field input,
.field textarea {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  color: var(--color-primary);
  background: var(--surface-card);
  border: 1px solid var(--color-tertiary);
  border-radius: 0;
  padding: 0 var(--space-3);
  height: 40px;
  width: 100%;
  transition: border-color var(--transition);
}

.field textarea {
  height: auto;
  padding: var(--space-2) var(--space-3);
  line-height: 1.6;
  resize: vertical;
  min-height: 80px;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--color-tertiary);
}

.field input:hover,
.field textarea:hover {
  border-color: var(--border-hover);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border: 2px solid var(--color-primary);
}

/* Honeypot — visually removed but present in DOM */
.gotcha {
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Primary button: inverts background on hover */
.btn-primary {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  height: 48px;
  min-width: 128px;
  padding: 0 var(--space-4);
  border: 1px solid var(--color-primary);
  border-radius: 0;
  background: var(--color-primary);
  color: var(--color-secondary);
  cursor: pointer;
  align-self: flex-start;
  transition: background-color var(--transition), color var(--transition);
}

.btn-primary:hover {
  background: var(--color-secondary);
  color: var(--color-primary);
}

.btn-primary:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Status message */
.form-status {
  font-size: 14px;
  line-height: 1.6;
  min-height: 1.6em;
}
.form-status.is-success {
  color: var(--color-success);
}
.form-status.is-error {
  color: var(--color-error);
}

/* Footer ------------------------------------------------------------------ */
.site-footer {
  flex: 0 0 auto;
  padding-top: var(--space-5);
}

.footer-mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-info);
}

/* Responsive -------------------------------------------------------------- */
@media (max-width: 600px) {
  .page {
    padding: var(--space-4) var(--space-3);
  }
  .hero {
    padding: var(--space-6) 0;
  }
  .btn-primary {
    width: 100%;
  }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}