/* ============================================================
   Riser Tool — shared design system
   Typography: Geist (sans-serif) + Geist Mono.
   Accent: #146ef5 (blue). Nav/buttons use mono for a typewriter feel.
   ============================================================ */

:root {
  /* Navy scale */
  --navy:       #1C2A3D;
  --navy-dp:    #0F1824;
  --navy-dk:    #141E2C;
  --navy-md:    #1F2D3F;
  --navy-lt:    #2A3A4E;
  --navy-hi:    #34475F;

  /* Primary accent — blue (#146EF5) */
  --accent:      #146EF5;
  --accent-dk:   #0B4FB8;
  --accent-lt:   #5A94FF;
  --accent-glow: rgba(20,110,245,.38);
  --accent-soft: rgba(20,110,245,.10);

  /* Backward-compat aliases — some tool internals still reference --green-*
     (e.g. status dots, selection outlines). Point them at the new accent
     so everything re-themes automatically without editing each file. */
  --green:      var(--accent);
  --green-dk:   var(--accent-dk);
  --green-lt:   var(--accent-lt);
  --green-glow: var(--accent-glow);
  --green-soft: var(--accent-soft);

  /* Per-tool accent colors for tile icons */
  --accent-dwv:  #3B82F6;
  --accent-gas:  #F5A524;

  /* Text */
  --tx:     #F4F7FA;
  --tx2:    rgba(244,247,250,.72);
  --tx3:    rgba(244,247,250,.48);
  --tx-inv: #0F1824;

  /* Borders & fills */
  --brd:      rgba(255,255,255,.08);
  --brd-hi:   rgba(255,255,255,.18);
  --fill:     rgba(255,255,255,.03);
  --fill-hi:  rgba(255,255,255,.06);
  --fill-max: rgba(255,255,255,.10);

  /* State */
  --red: #FF4D4F; --red-bg: rgba(255,77,79,.10);
  --amb: #F5A524; --amb-bg: rgba(245,165,36,.10);
  --blue:#3B82F6; --blue-bg:rgba(59,130,246,.12);

  /* Shadows */
  --sh-xs: 0 1px 2px rgba(0,0,0,.4);
  --sh:    0 2px 8px rgba(0,0,0,.25), 0 12px 32px rgba(0,0,0,.2);
  --sh-md: 0 4px 16px rgba(0,0,0,.35), 0 20px 48px rgba(0,0,0,.25);
  --sh-lg: 0 8px 24px rgba(0,0,0,.4), 0 32px 64px rgba(0,0,0,.3);

  /* Radii */
  --r-sm: 8px;  --r: 12px;  --r-lg: 16px;  --r-xl: 24px;  --r-full: 999px;

  /* Motion */
  --ease: cubic-bezier(.2,.8,.2,1);
  --ease-out: cubic-bezier(.16,1,.3,1);
  --t: 180ms;  --t-slow: 420ms;

  /* Typography — Geist sans-serif family */
  --font-sans: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* Spacing scale (4px base) */
  --sp-1:4px;  --sp-2:8px;  --sp-3:12px; --sp-4:16px;
  --sp-5:20px; --sp-6:24px; --sp-7:32px; --sp-8:48px;
  --sp-9:64px; --sp-10:80px;

  /* Type scale */
  --fs-micro: 11px;
  --fs-xs:    12px;
  --fs-sm:    13px;
  --fs-md:    14px;
  --fs-base:  15px;
  --fs-lg:    17px;
  --fs-xl:    20px;
  --fs-2xl:   28px;
  --fs-3xl:   40px;
  --fs-4xl:   56px;
  --fs-5xl:   80px;

  --lh-tight:   1.05;
  --lh-snug:    1.2;
  --lh-normal:  1.45;
  --lh-relaxed: 1.6;

  --track-tight: -.035em;
  --track-base:  -.01em;
  --track-wide:  0;
  --track-caps:  .1em;

  /* Header height — static across every page */
  --nav-h: 64px;
}

/* -------- Reset ----- */
*,*::before,*::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  font-weight: 400;
  color: var(--tx);
  background: var(--navy-dp);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'ss01', 'cv11';
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img { max-width: 100%; display: block; }
input, select, textarea, .pp-nav, .pp-btn { font-family: var(--font-sans); }

/* ============================================================
   TOP NAV — static across every page
   ============================================================ */
.pp-nav {
  position: sticky; top: 0; z-index: 500;
  display: flex; align-items: center;
  height: var(--nav-h); min-height: var(--nav-h);
  padding: 0 var(--sp-6);
  background: rgba(15,24,36,.75);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid var(--brd);
  gap: var(--sp-4);
  flex-shrink: 0;
}
.pp-nav__brand {
  display: flex; align-items: center;
  height: 30px;
  transition: opacity var(--t) var(--ease);
  flex-shrink: 0;
}
.pp-nav__brand:hover { opacity: .78; }
.pp-nav__brand img { height: 24px; width: auto; display: block; }
.pp-nav__wordmark {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--tx);
  text-transform: none;
  white-space: nowrap;
}

.pp-nav__links {
  display: flex; gap: 2px;
  margin-left: var(--sp-6);
  padding-left: var(--sp-6);
  border-left: 1px solid var(--brd);
  height: 30px; align-items: center;
}
.pp-nav__link {
  padding: 7px 13px;
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--tx2);
  letter-spacing: .04em;
  transition: all var(--t) var(--ease);
  white-space: nowrap;
  line-height: 1;
}
.pp-nav__link:hover { color: var(--tx); background: var(--fill-hi); }
.pp-nav__link.is-active {
  color: var(--tx);
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px rgba(20,110,245,.32);
}

.pp-nav__spacer { flex: 1; }

.pp-nav__user {
  display: flex; align-items: center; gap: var(--sp-2);
  padding: 3px 14px 3px 3px;
  border-radius: var(--r-full);
  background: var(--fill);
  border: 1px solid var(--brd);
  cursor: pointer;
  transition: all var(--t) var(--ease);
  position: relative; height: 36px;
}
.pp-nav__user:hover { background: var(--fill-hi); border-color: var(--brd-hi); }
.pp-nav__avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--navy-lt);
  display: flex; align-items: center; justify-content: center;
  font-size: var(--fs-xs); font-weight: 600; color: var(--tx);
  overflow: hidden; flex-shrink: 0;
}
.pp-nav__avatar img   { width: 100%; height: 100%; object-fit: cover; }
.pp-nav__user-meta    { font-size: var(--fs-xs); line-height: 1.2; }
.pp-nav__user-name    { font-weight: 600; color: var(--tx); font-size: var(--fs-xs); letter-spacing: var(--track-base); }
.pp-nav__user-email   { color: var(--tx3); font-size: 10.5px; letter-spacing: 0; }

.pp-nav__menu {
  position: absolute; top: calc(100% + 8px); right: 0;
  min-width: 220px;
  padding: 6px;
  background: var(--navy-md);
  border: 1px solid var(--brd-hi);
  border-radius: var(--r);
  box-shadow: var(--sh-md);
  display: none;
  animation: ppMenuIn 180ms var(--ease-out);
}
.pp-nav__menu.is-open { display: block; }
.pp-nav__menu-item {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: 9px 10px;
  border-radius: var(--r-sm);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--tx);
  transition: background var(--t) var(--ease);
}
.pp-nav__menu-item:hover { background: var(--fill-hi); }
.pp-nav__menu-item.danger { color: var(--red); }
.pp-nav__menu-sep { height: 1px; background: var(--brd); margin: 4px 2px; }

@keyframes ppMenuIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   MOBILE-ONLY nav adjustments (≤720px wide).
   Desktop and tablet layouts above this width are unchanged.
   ============================================================ */
.pp-nav__hamburger {
  display: none;  /* hidden on desktop */
  align-items: center; justify-content: center;
  width: 36px; height: 36px;
  background: transparent;
  color: var(--tx);
  border: 1px solid var(--brd);
  border-radius: var(--r-sm);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}
.pp-nav__hamburger:hover { background: var(--fill-hi); border-color: var(--brd-hi); }

@media (max-width: 720px) {
  /* Show hamburger, hide the inline links row. */
  .pp-nav__hamburger { display: inline-flex; }
  .pp-nav__links {
    /* Inline links collapse into a slide-down panel absolutely positioned
       under the nav bar. Appears when .pp-nav--mobile-open is set. */
    position: absolute;
    top: 100%; left: 0; right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    height: auto;
    margin: 0;
    padding: var(--sp-3);
    gap: var(--sp-1);
    background: rgba(15,24,36,.98);
    border: 0;
    border-top: 1px solid var(--brd);
    border-bottom: 1px solid var(--brd-hi);
    backdrop-filter: saturate(160%) blur(16px);
    -webkit-backdrop-filter: saturate(160%) blur(16px);
    box-shadow: 0 10px 30px rgba(0,0,0,.5);
    z-index: 499;
  }
  .pp-nav--mobile-open .pp-nav__links {
    display: flex;
    animation: ppMenuIn 180ms var(--ease-out);
  }
  .pp-nav--mobile-open .pp-nav__hamburger {
    background: var(--accent-soft);
    border-color: rgba(20,110,245,.3);
    color: var(--accent-lt);
  }
  .pp-nav__links .pp-nav__link {
    padding: 13px 14px;
    font-size: var(--fs-md);
    line-height: 1.2;
    border-radius: var(--r);
    text-align: left;
  }

  /* Center the logo between hamburger and user avatar */
  .pp-nav { padding: 0 var(--sp-3); position: relative; }
  .pp-nav__brand {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
  .pp-nav__brand img { height: 20px; }

  /* Shrink user badge: avatar + initials only, hide email text */
  .pp-nav__user {
    padding: 2px;
    height: 32px;
    gap: 0;
  }
  .pp-nav__user-meta { display: none; }  /* name/email hidden on mobile */
  .pp-nav__avatar { width: 28px; height: 28px; }
}


/* ============================================================
   BUTTONS
   ============================================================ */
.pp-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--sp-2);
  padding: 10px 18px;
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
  line-height: 1;
  background: var(--fill);
  color: var(--tx);
  border: 1px solid var(--brd);
  transition: all var(--t) var(--ease);
  cursor: pointer; white-space: nowrap;
}
.pp-btn:hover { background: var(--fill-hi); border-color: var(--brd-hi); }
.pp-btn--filled {
  background: linear-gradient(180deg, var(--accent-lt) 0%, var(--accent) 100%);
  color: #fff;
  border-color: transparent;
  font-weight: 600;
  box-shadow: 0 1px 0 rgba(255,255,255,.24) inset, 0 4px 14px rgba(20,110,245,.30);
}
.pp-btn--filled:hover {
  background: linear-gradient(180deg, var(--accent-lt) 0%, var(--accent-dk) 100%);
  box-shadow: 0 1px 0 rgba(255,255,255,.24) inset, 0 6px 22px rgba(20,110,245,.45);
  transform: translateY(-1px);
}
.pp-btn--ghost { background: transparent; border: 1px solid var(--brd); }
.pp-btn--sm    { padding: 7px 12px;  font-size: 11px; }
.pp-btn--lg    { padding: 14px 22px; font-size: 13px; }

/* ============================================================
   LAST-SAVED STATUS PILL (tool pages)
   ============================================================ */
.rd-save-status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  padding: 0 10px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  border-radius: 6px;
  white-space: nowrap;
  user-select: none;
  color: var(--tx3);
  background: rgba(255,255,255,.03);
  border: 1px solid var(--brd);
  transition: color var(--t) var(--ease), background var(--t) var(--ease);
}
.rd-save-status[data-kind="dirty"] {
  color: #FFC773;
  background: rgba(245,165,36,.08);
  border-color: rgba(245,165,36,.22);
}
.rd-save-status[data-kind="saving"] {
  color: var(--accent-lt);
  background: rgba(20,110,245,.08);
  border-color: rgba(20,110,245,.22);
}
.rd-save-status[data-kind="clean"] {
  color: var(--tx3);
}

/* ============================================================
   COPYRIGHT — small fixed notice on tool pages
   ============================================================ */
.rd-copyright {
  position: fixed;
  bottom: 6px;
  right: 10px;
  z-index: 10;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .06em;
  color: var(--tx3);
  pointer-events: none;
  user-select: none;
}
.pp-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}
.pp-dot--red  { background: var(--red);  box-shadow: 0 0 8px rgba(255,77,79,.5); }
.pp-dot--amb  { background: var(--amb);  box-shadow: 0 0 8px rgba(245,165,36,.5); }
.pp-dot--gray { background: var(--tx3);  box-shadow: none; }

/* A11Y */
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

/* ============================================================
   TOOL-PAGE BUTTON HARMONIZATION
   Normalize DWV's .btn-split and GAS's .split-btn to one look.
   Both become the same blue pill with a caret — same shape,
   same colors, same font, same height.
   ============================================================ */

/* The outer container — NOT overflow:hidden, because the dropdown menu
   (.split-menu) is a child and needs to escape below the buttons.
   Rounded-pill look is handled by the first and last inner buttons
   each getting their own matching corner radius. */
.btn-split, .split-btn {
  display: inline-flex !important;
  align-items: stretch !important;
  box-shadow: 0 1px 0 rgba(255,255,255,.24) inset,
              0 4px 14px rgba(20,110,245,.30) !important;
  height: 34px !important;
  position: relative;
  background: transparent !important;
  padding: 0 !important;
  border-radius: var(--r-sm) !important;
}

/* Every interior button: identical styling, flat inside the container. */
.btn-split > button,
.split-btn > button,
.btn-split .btn.filled,
.split-btn .btn.filled,
.btn-split-main, .split-main,
.btn-split-arrow, .split-caret {
  background: linear-gradient(180deg, var(--accent-lt) 0%, var(--accent) 100%) !important;
  color: #fff !important;
  border: none !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  font-family: var(--font-mono) !important;
  font-weight: 600 !important;
  font-size: 12px !important;
  letter-spacing: .06em !important;
  text-transform: uppercase !important;
  height: 34px !important;
  padding: 0 16px !important;
  margin: 0 !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  transition: filter var(--t) var(--ease) !important;
  cursor: pointer;
}

/* First (main) button — left-rounded. Last (arrow) button — right-rounded.
   Uses class selectors for cross-tool reliability (DWV has .btn-split-*,
   Gas has .split-main / .split-caret). */
.btn-split-main, .split-main {
  border-top-left-radius:    var(--r-sm) !important;
  border-bottom-left-radius: var(--r-sm) !important;
}
.btn-split-arrow, .split-caret {
  border-top-right-radius:    var(--r-sm) !important;
  border-bottom-right-radius: var(--r-sm) !important;
}

/* The caret portion gets a subtle divider + tighter padding. */
.btn-split-arrow, .split-caret,
.btn-split > button:last-child,
.split-btn  > button:last-child {
  padding: 0 11px !important;
  border-left: 1px solid rgba(0,0,0,.22) !important;
  min-width: 34px !important;
  width: 34px !important;
}

/* Gas's caret uses an SVG, DWV's uses the ▾ text character. Force both to
   render the same ▾ unicode glyph for pixel-perfect parity. */
.split-caret svg { display: none !important; }
.split-caret::after,
.btn-split-arrow:empty::after {
  content: '▾';
  font-size: 12px;
  line-height: 1;
  color: #fff;
  display: inline-block;
}

/* Hover: both halves brighten together. */
.btn-split:hover  > button,
.btn-split:hover  .btn.filled,
.btn-split:hover  .btn-split-main,
.btn-split:hover  .btn-split-arrow,
.split-btn:hover  > button,
.split-btn:hover  .btn.filled,
.split-btn:hover  .split-main,
.split-btn:hover  .split-caret {
  filter: brightness(1.07) !important;
}