/* ============================================================
   Dave Sierk — Design System
   Combines colors_and_type.css + kit.css
   Source: Claude Design export (2026-05-18)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&display=swap');

:root {
  /* ─── PRIMARY ─────────────────────────────────────────────── */
  --color-primary:             #0049a3;
  --color-primary-container:   #0052cc;
  --color-primary-dark:        #003d9b;
  --color-primary-fixed:       #dae2ff;
  --color-primary-fixed-dim:   #b2c5ff;
  --color-on-primary:          #ffffff;
  --color-on-primary-fixed:    #001848;

  /* ─── NEUTRALS ────────────────────────────────────────────── */
  --color-navy:                #171c25;
  --color-on-surface:          #171c25;
  --color-on-surface-variant:  #434654;
  --color-outline:             #737685;
  --color-outline-variant:     #c3c6d6;

  /* ─── SURFACES ────────────────────────────────────────────── */
  --color-surface:                   #f9f9ff;
  --color-surface-bright:            #f8f9fa;
  --color-surface-container-lowest:  #ffffff;
  --color-surface-container-low:     #f0f3ff;
  --color-surface-container:         #edeeef;
  --color-surface-container-high:    #e7e8e9;
  --color-surface-container-highest: #dee2ef;

  /* ─── SECONDARY ───────────────────────────────────────────── */
  --color-secondary:           #4b5f82;
  --color-secondary-container: #c1d5fe;
  --color-on-secondary-container: #495c7f;

  /* ─── TERTIARY ────────────────────────────────────────────── */
  --color-tertiary:            #7b2600;
  --color-tertiary-container:  #a33500;
  --color-tertiary-fixed:      #ffdbcf;
  --color-on-tertiary-fixed:   #380d00;

  /* ─── SEMANTIC ────────────────────────────────────────────── */
  --color-error:               #ba1a1a;
  --color-error-container:     #ffdad6;
  --color-on-error:            #ffffff;
  --color-success:             #0f7a3d;

  /* ─── SELECTION ───────────────────────────────────────────── */
  --color-selection-bg:        var(--color-primary-fixed);
  --color-selection-fg:        var(--color-on-primary-fixed);

  /* ─── GRADIENT + SHADOW ───────────────────────────────────── */
  --gradient-primary: linear-gradient(135deg, #003d9b 0%, #0052cc 100%);

  --shadow-brand:
    rgba(27, 97, 201, 0.08) 0px 4px 6px -1px,
    rgba(27, 97, 201, 0.05) 0px 10px 15px -3px;
  --shadow-brand-sm:
    rgba(45, 127, 249, 0.12) 0px 1px 3px,
    rgba(45, 127, 249, 0.06) 0px 2px 6px;
  --shadow-brand-lg:
    rgba(27, 97, 201, 0.10) 0px 10px 20px -5px,
    rgba(27, 97, 201, 0.06) 0px 20px 40px -10px;

  --border-ghost:        1px solid rgba(195, 198, 214, 0.40);
  --border-ghost-strong: 1px solid rgba(195, 198, 214, 0.70);

  --glass-bg:   rgba(255, 255, 255, 0.80);
  --glass-blur: blur(20px);

  /* ─── RADII ────────────────────────────────────────────────── */
  --radius-xs:   4px;
  --radius-sm:   8px;
  --radius-md:   12px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-full: 9999px;

  /* ─── SPACING ─────────────────────────────────────────────── */
  --space-1:   4px;
  --space-2:   8px;
  --space-3:   12px;
  --space-4:   16px;
  --space-5:   24px;
  --space-6:   32px;
  --space-7:   48px;
  --space-8:   64px;
  --space-9:   96px;
  --space-10:  128px;

  /* ─── TYPE FAMILIES ───────────────────────────────────────── */
  --font-headline: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-body:     'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-label:    'Space Grotesk', 'Inter', ui-sans-serif, system-ui, sans-serif;
  --font-mono:     ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* ─── TYPE SCALE ──────────────────────────────────────────── */
  --fs-display-xl:  4.5rem;
  --fs-display-lg:  3.5rem;
  --fs-display-md:  2.5rem;
  --fs-headline-lg: 2rem;
  --fs-headline-md: 1.5rem;
  --fs-title-lg:    1.25rem;
  --fs-title-md:    1.125rem;
  --fs-body-lg:     1rem;
  --fs-body-md:     0.9375rem;
  --fs-label-md:    0.75rem;
  --fs-label-sm:    0.6875rem;

  --lh-tight: 1.1;
  --lh-snug:  1.2;
  --lh-cozy:  1.4;
  --lh-body:  1.6;
  --lh-loose: 1.75;

  --tracking-tight:  -0.02em;
  --tracking-snug:   -0.01em;
  --tracking-normal:  0;
  --tracking-wide:    0.08em;
  --tracking-label:   0.1em;
  --tracking-mega:    0.2em;
}

/* ============================================================
   BASE
   ============================================================ */

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

html {
  font-family: var(--font-body);
  color: var(--color-on-surface);
  background: var(--color-surface);
}
body {
  margin: 0;
  font-size: var(--fs-body-lg);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  background: var(--color-surface);
  color: var(--color-on-surface);
}

::selection { background: var(--color-selection-bg); color: var(--color-selection-fg); }

h1, .h1 {
  font-family: var(--font-headline);
  font-size: var(--fs-display-lg);
  font-weight: 800;
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-on-surface);
}
h2, .h2 {
  font-family: var(--font-headline);
  font-size: var(--fs-headline-lg);
  font-weight: 800;
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-snug);
  color: var(--color-on-surface);
}
h3, .h3 {
  font-family: var(--font-headline);
  font-size: var(--fs-headline-md);
  font-weight: 700;
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-snug);
  color: var(--color-on-surface);
}
h4, .h4 {
  font-family: var(--font-headline);
  font-size: var(--fs-title-md);
  font-weight: 600;
  line-height: var(--lh-cozy);
  letter-spacing: 0.01em;
}
p, .body {
  font-family: var(--font-body);
  font-size: var(--fs-body-lg);
  line-height: var(--lh-body);
  color: var(--color-on-surface-variant);
  text-wrap: pretty;
}
small, .label, .eyebrow {
  font-family: var(--font-label);
  font-size: var(--fs-label-md);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--color-on-surface-variant);
}
code, kbd, .mono {
  font-family: var(--font-mono);
  font-size: 0.875em;
}
a {
  color: var(--color-primary);
  text-decoration-color: var(--color-primary-fixed);
  text-underline-offset: 4px;
}
a:hover { text-decoration: underline; }

/* ============================================================
   UTILITY RECIPES
   ============================================================ */

.ghost-border  { border: var(--border-ghost); }
.glass         { background: var(--glass-bg); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur); }
.gradient-primary { background: var(--gradient-primary); }
.shadow-brand  { box-shadow: var(--shadow-brand); }

.material-symbols-outlined { font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24; }

/* ============================================================
   NAV
   ============================================================ */

.ds-nav { position: sticky; top: 0; z-index: 50; background: var(--glass-bg); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur); border-bottom: var(--border-ghost); }
.ds-nav-inner { max-width: 1280px; margin: 0 auto; height: 64px; padding: 0 32px; display: flex; align-items: center; justify-content: space-between; }
.ds-wordmark { font-family: var(--font-headline); font-weight: 900; font-size: 20px; letter-spacing: -0.04em; color: var(--color-primary); text-decoration: none; cursor: pointer; }
.ds-nav-links { display: flex; gap: 32px; }
.ds-nav-link { font-family: var(--font-body); font-weight: 600; font-size: 14px; color: var(--color-on-surface-variant); text-decoration: none; cursor: pointer; position: relative; padding: 6px 0; transition: color .2s; }
.ds-nav-link:hover { color: var(--color-primary); text-decoration: none; }
.ds-nav-link.is-active { color: var(--color-primary); }
.ds-nav-link.is-active::after { content: ""; position: absolute; left: 50%; bottom: -4px; transform: translateX(-50%); width: 4px; height: 4px; border-radius: 50%; background: var(--color-primary); }

/* ============================================================
   BUTTONS
   ============================================================ */

.ds-btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; border-radius: var(--radius-md); font-family: var(--font-label); font-weight: 700; font-size: 12px; letter-spacing: .15em; text-transform: uppercase; cursor: pointer; border: none; text-decoration: none; transition: all .2s; }
.ds-btn-sm  { padding: 9px 18px; font-size: 11px; letter-spacing: .14em; }
.ds-btn-lg  { padding: 18px 36px; font-size: 13px; letter-spacing: .2em; }
.ds-btn-primary { background: var(--gradient-primary); color: #fff; box-shadow: var(--shadow-brand-sm); }
.ds-btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-brand); text-decoration: none; color: #fff; }
.ds-btn-primary:active { transform: translateY(1px); }
.ds-btn-ghost { background: transparent; color: var(--color-on-surface); border: var(--border-ghost-strong); }
.ds-btn-ghost:hover { background: var(--color-surface-container-low); text-decoration: none; color: var(--color-on-surface); }
.ds-btn .material-symbols-outlined { font-size: 18px; }

/* ============================================================
   SHARED TYPE
   ============================================================ */

.ds-eyebrow { font-family: var(--font-label); font-weight: 700; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--color-on-surface-variant); }
.ds-eyebrow-rail { display: flex; align-items: center; gap: 12px; color: var(--color-primary); }
.ds-rail { width: 40px; height: 1px; background: var(--color-primary); display: inline-block; }
.ds-eyebrow-chip { display: inline-block; padding: 6px 10px; background: var(--color-primary-fixed); color: var(--color-on-primary-fixed); font-family: var(--font-label); font-weight: 700; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; border-radius: 2px; margin-bottom: 24px; }
.ds-display { font-family: var(--font-headline); font-weight: 800; font-size: 64px; line-height: 1.05; letter-spacing: -0.02em; color: var(--color-on-surface); margin: 0 0 24px; text-wrap: balance; }
.ds-display-sm { font-size: 48px; }
.ds-display-em { color: var(--color-primary); font-style: italic; font-weight: 800; }
.ds-h2 { font-family: var(--font-headline); font-weight: 800; font-size: 36px; line-height: 1.15; letter-spacing: -0.01em; margin: 0 0 12px; }
.ds-h3 { font-family: var(--font-headline); font-weight: 700; font-size: 22px; line-height: 1.25; margin: 0 0 12px; }
.ds-lede { font-size: 19px; line-height: 1.55; color: var(--color-on-surface-variant); max-width: 560px; margin: 0 0 32px; }
.ds-muted { color: var(--color-on-surface-variant); font-size: 15px; line-height: 1.6; }
.ds-ul { font-weight: 700; border-bottom: 2px solid var(--color-primary-fixed); color: var(--color-on-surface); }
.ds-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--color-primary); margin-right: 8px; flex-shrink: 0; }
.ds-dot-success { background: var(--color-success); }

/* ============================================================
   LAYOUT
   ============================================================ */

.ds-section { max-width: 1280px; margin: 0 auto; padding: 96px 32px; }
.ds-section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 48px; flex-wrap: wrap; }

/* ============================================================
   HERO
   ============================================================ */

.ds-hero { max-width: 1280px; margin: 0 auto; padding: 72px 32px 96px; display: grid; grid-template-columns: 2fr 1fr; gap: 48px; align-items: center; min-height: 640px; }
.ds-hero-copy { z-index: 2; }
.ds-cta-row { display: flex; gap: 16px; flex-wrap: wrap; }
.ds-hero-visual { position: relative; height: 500px; border-radius: var(--radius-xl); overflow: hidden; border: var(--border-ghost); background: var(--color-surface-container-high); }
.ds-hero-visual img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 20%; }
.ds-hero-photo { position: absolute; inset: 0; background: linear-gradient(135deg, #0049a3 0%, #4b5f82 60%, #c3c6d6 100%); }
.ds-hero-photo::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, var(--color-surface) 0%, transparent 60%); }
.ds-hero-overlay { position: absolute; left: 20px; right: 20px; bottom: 20px; padding: 20px 22px; border-radius: var(--radius-md); border: var(--border-ghost); background: var(--glass-bg); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur); }
.ds-hero-overlay .ds-eyebrow { color: var(--color-primary); display: block; margin-bottom: 6px; }
.ds-overlay-title { margin: 0; font-family: var(--font-headline); font-weight: 700; font-size: 17px; line-height: 1.3; color: var(--color-on-surface); }

/* ============================================================
   COMPETENCY GRID
   ============================================================ */

.ds-grid-sec { background: var(--color-surface-container-lowest); border-top: var(--border-ghost); border-bottom: var(--border-ghost); padding: 96px 32px; }
.ds-grid-inner { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(195,198,214,.3); border: 1px solid rgba(195,198,214,.3); }
.ds-grid-cell { background: var(--color-surface-container-lowest); padding: 48px; display: flex; flex-direction: column; transition: background .2s; }
.ds-grid-cell:hover { background: var(--color-surface-container-low); }
.ds-grid-icon { color: var(--color-primary); font-size: 36px !important; margin-bottom: 24px; }
.ds-grid-title { font-family: var(--font-headline); font-weight: 700; font-size: 28px; margin: 12px 0 20px; line-height: 1.2; }
.ds-grid-body { color: var(--color-on-surface-variant); line-height: 1.65; margin: 0 0 28px; }
.ds-grid-tags { list-style: none; padding: 0; margin: auto 0 0; display: flex; flex-direction: column; gap: 10px; }
.ds-grid-tags li { display: flex; align-items: center; font-family: var(--font-label); font-weight: 500; font-size: 14px; color: var(--color-primary); }

/* ============================================================
   TIMELINE
   ============================================================ */

.ds-timeline { display: flex; flex-direction: column; gap: 24px; }
.ds-timeline-row { display: grid; grid-template-columns: 240px 1fr 48px; gap: 32px; align-items: flex-start; padding: 32px; border: var(--border-ghost); border-radius: var(--radius-xl); background: var(--color-surface-container-lowest); transition: all .25s; }
.ds-timeline-row:hover { box-shadow: var(--shadow-brand); transform: translateY(-2px); }
.ds-metric { padding: 20px 24px; border-radius: 0 var(--radius-md) var(--radius-md) 0; border-left: 4px solid var(--color-primary); background: rgba(0,73,163,.06); }
.ds-metric-primary   { border-left-color: var(--color-primary);   background: rgba(0,73,163,.06); }
.ds-metric-secondary { border-left-color: var(--color-secondary); background: rgba(75,95,130,.08); }
.ds-metric-neutral   { border-left-color: var(--color-outline);   background: var(--color-surface-container-highest); }
.ds-metric-num { font-family: var(--font-label); font-weight: 700; font-size: 32px; line-height: 1; color: var(--color-primary); }
.ds-metric-secondary .ds-metric-num { color: var(--color-secondary); }
.ds-metric-neutral   .ds-metric-num { color: var(--color-on-surface-variant); }
.ds-metric-label { font-family: var(--font-label); font-weight: 700; font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--color-on-surface-variant); margin-top: 6px; line-height: 1.2; }
.ds-timeline-copy .ds-eyebrow { display: block; margin-bottom: 6px; }
.ds-timeline-title { font-family: var(--font-headline); font-weight: 700; font-size: 22px; margin: 4px 0 12px; }
.ds-timeline-copy p { color: var(--color-on-surface-variant); line-height: 1.6; margin: 0; }
.ds-timeline-arrow { color: var(--color-outline); justify-self: end; align-self: center; transition: color .2s; }
.ds-timeline-row:hover .ds-timeline-arrow { color: var(--color-primary); }

/* ============================================================
   METRICS BAND
   ============================================================ */

.ds-metrics-band { background: var(--color-navy); color: var(--color-surface); padding: 96px 32px; }
.ds-metrics-inner { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 48px; }
.ds-metric-big { font-family: var(--font-headline); font-weight: 800; font-size: 56px; line-height: 1; margin-bottom: 10px; }
.ds-metric-eyebrow { font-family: var(--font-label); font-weight: 700; font-size: 11px; letter-spacing: .15em; text-transform: uppercase; color: var(--color-primary-fixed); opacity: .75; }

/* ============================================================
   CTA BLOCK
   ============================================================ */

.ds-cta-block { background: var(--color-surface-container-low); border-radius: var(--radius-xl); padding: 64px; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.ds-cta-underline { color: var(--color-primary); border-bottom: 3px solid var(--color-primary); padding-bottom: 2px; }
.ds-human-col { display: flex; flex-direction: column; gap: 16px; }
.ds-human-card { display: flex; gap: 16px; padding: 18px 20px; background: var(--color-surface-container-lowest); border: var(--border-ghost); border-radius: var(--radius-md); }
.ds-human-icon { color: var(--color-primary); font-size: 22px !important; }
.ds-human-title { font-family: var(--font-label); font-weight: 700; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--color-on-surface); margin: 0 0 4px; }
.ds-human-card p { margin: 0; font-size: 14px; color: var(--color-on-surface-variant); line-height: 1.55; }

/* ============================================================
   FOOTER
   ============================================================ */

.ds-footer { background: var(--color-surface-container-lowest); border-top: var(--border-ghost); padding: 48px 32px; }
.ds-footer-inner { max-width: 1280px; margin: 0 auto; display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.ds-footer-mark { font-family: var(--font-headline); font-weight: 900; font-size: 18px; letter-spacing: -0.04em; color: var(--color-primary); margin-bottom: 8px; }
.ds-mono-link { font-family: var(--font-label); font-weight: 500; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--color-outline); margin: 0; }
.ds-footer-links { display: flex; gap: 32px; align-items: center; }
.ds-footer-links a { font-family: var(--font-label); font-weight: 500; font-size: 11px; letter-spacing: .1em; color: var(--color-outline); text-decoration: none; }
.ds-footer-links a:hover { color: var(--color-primary); }

/* ============================================================
   WORK / CASE STUDY
   ============================================================ */

.ds-work-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.ds-work-card { background: var(--color-surface-container-lowest); border: var(--border-ghost); border-radius: var(--radius-xl); overflow: hidden; cursor: pointer; transition: all .25s; text-decoration: none; display: block; }
.ds-work-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-brand); text-decoration: none; }
.ds-work-thumb { height: 180px; background: var(--gradient-primary); position: relative; }
.ds-work-thumb::after { content: attr(data-co); position: absolute; bottom: 16px; left: 20px; font-family: var(--font-headline); font-weight: 900; font-size: 24px; letter-spacing: -0.02em; color: rgba(255,255,255,.85); }
.ds-work-card:nth-child(2) .ds-work-thumb { background: linear-gradient(135deg,#4b5f82,#c1d5fe); }
.ds-work-card:nth-child(3) .ds-work-thumb { background: linear-gradient(135deg,#171c25,#434654); }
.ds-work-card:nth-child(4) .ds-work-thumb { background: linear-gradient(135deg,#7b2600,#a33500); }
.ds-work-body { padding: 28px 30px; }
.ds-work-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.ds-work-metric { font-family: var(--font-label); font-weight: 700; font-size: 13px; color: var(--color-primary); }
.ds-work-title { font-family: var(--font-headline); font-weight: 700; font-size: 22px; line-height: 1.25; margin: 6px 0 10px; color: var(--color-on-surface); }
.ds-work-body p { color: var(--color-on-surface-variant); line-height: 1.6; margin: 0 0 16px; }
.ds-link-arrow { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-label); font-weight: 700; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--color-primary); }
.ds-link-arrow .material-symbols-outlined { font-size: 16px; }

/* ============================================================
   CONTACT
   ============================================================ */

.ds-contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.ds-availability { display: inline-flex; align-items: center; gap: 10px; padding: 10px 16px; background: var(--color-surface-container-lowest); border: var(--border-ghost); border-radius: 999px; margin-top: 24px; }
.ds-form { display: flex; flex-direction: column; gap: 20px; padding: 40px; background: var(--color-surface-container-low); border-radius: var(--radius-xl); }
.ds-field { display: flex; flex-direction: column; gap: 6px; }
.ds-field label { font-family: var(--font-label); font-weight: 700; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--color-on-surface-variant); }
.ds-field input, .ds-field textarea { font-family: var(--font-body); font-size: 15px; padding: 14px 16px; border: var(--border-ghost-strong); border-radius: var(--radius-md); background: var(--color-surface-container-lowest); color: var(--color-on-surface); resize: vertical; }
.ds-field input:focus, .ds-field textarea:focus { outline: 2px solid var(--color-primary-fixed); outline-offset: -1px; border-color: var(--color-primary); }

/* ============================================================
   RESPONSIVE — basic stacking at mobile
   ============================================================ */

@media (max-width: 768px) {
  .ds-hero { grid-template-columns: 1fr; padding: 48px 20px 64px; min-height: auto; }
  .ds-hero-visual { height: 320px; }
  .ds-display { font-size: 40px; }
  .ds-grid-inner { grid-template-columns: 1fr; }
  .ds-timeline-row { grid-template-columns: 1fr; }
  .ds-timeline-arrow { display: none; }
  .ds-metrics-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .ds-metric-big { font-size: 40px; }
  .ds-cta-block { grid-template-columns: 1fr; padding: 40px 24px; gap: 40px; }
  .ds-work-grid { grid-template-columns: 1fr; }
  .ds-contact-grid { grid-template-columns: 1fr; }
  .ds-nav-inner { padding: 0 20px; }
  .ds-nav-links { gap: 20px; }
  .ds-section { padding: 64px 20px; }
  .ds-grid-sec { padding: 64px 20px; }
  .ds-grid-cell { padding: 32px 24px; }
}