/* =========================================
   NURSECALC — Main Stylesheet
   Clinical palette: Deep teal + clean white
   ========================================= */

/* ── Design Tokens ── */
:root,
[data-theme='light'] {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Clinical Teal Palette */
  --color-bg: #f5f9fa;
  --color-surface: #ffffff;
  --color-surface-2: #f0f7f8;
  --color-surface-offset: #e6f1f3;
  --color-border: #cde3e6;
  --color-divider: #d8ecee;

  --color-text: #0f2b30;
  --color-text-muted: #4d7178;
  --color-text-faint: #9dbdc2;
  --color-text-inverse: #ffffff;

  --color-primary: #0d6e7a;
  --color-primary-hover: #095a65;
  --color-primary-active: #074650;
  --color-primary-highlight: #d4edf0;
  --color-primary-light: #e8f6f7;

  --color-accent: #e74c6e;
  --color-success: #1a7a47;
  --color-warning: #c26b1a;
  --color-blue: #2557c7;
  --color-purple: #6b3cb5;

  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(13, 110, 122, 0.08);
  --shadow-md: 0 4px 16px rgba(13, 110, 122, 0.1);
  --shadow-lg: 0 12px 40px rgba(13, 110, 122, 0.14);

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

[data-theme='dark'] {
  --color-bg: #0a1a1e;
  --color-surface: #0e2228;
  --color-surface-2: #112830;
  --color-surface-offset: #0f2430;
  --color-border: #1e3f47;
  --color-divider: #183540;

  --color-text: #d6edf0;
  --color-text-muted: #6ea8b0;
  --color-text-faint: #3d7078;
  --color-text-inverse: #0a1a1e;

  --color-primary: #3fa8b5;
  --color-primary-hover: #2d8d99;
  --color-primary-active: #1d7280;
  --color-primary-highlight: #1a3840;
  --color-primary-light: #142e35;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0a1a1e;
    --color-surface: #0e2228;
    --color-surface-2: #112830;
    --color-surface-offset: #0f2430;
    --color-border: #1e3f47;
    --color-divider: #183540;
    --color-text: #d6edf0;
    --color-text-muted: #6ea8b0;
    --color-text-faint: #3d7078;
    --color-text-inverse: #0a1a1e;
    --color-primary: #3fa8b5;
    --color-primary-hover: #2d8d99;
    --color-primary-active: #1d7280;
    --color-primary-highlight: #1a3840;
    --color-primary-light: #142e35;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.4);
  }
}

/* ── Base Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}
body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}
img, svg { display: block; max-width: 100%; height: auto; }
h1,h2,h3,h4 { text-wrap: balance; line-height: 1.15; }
p, li { text-wrap: pretty; }
a, button, input, textarea, select { font: inherit; color: inherit; transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition); }
button { cursor: pointer; background: none; border: none; }
::selection { background: var(--color-primary-highlight); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }

/* ── Layout ── */
.container {
  width: min(var(--content-wide), 100%);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
@media (min-width: 768px) { .container { padding-inline: var(--space-10); } }
@media (min-width: 1100px) { .container { padding-inline: var(--space-16); } }

/* ── Nav ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: 64px;
}
.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}
.logo-mark { width: 32px; height: 32px; flex-shrink: 0; }
.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.nav-links {
  display: none;
  gap: var(--space-6);
  margin-left: auto;
}
@media (min-width: 768px) {
  .nav-links { display: flex; align-items: center; }
}
.nav-links a {
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}
.nav-links a:hover { color: var(--color-primary); }
.theme-toggle {
  margin-left: auto;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
}
.theme-toggle:hover { color: var(--color-primary); background: var(--color-primary-light); }
@media (min-width: 768px) { .theme-toggle { margin-left: 0; } }
.nav-mobile-toggle {
  display: flex;
  align-items: center;
  padding: var(--space-2);
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
}
@media (min-width: 768px) { .nav-mobile-toggle { display: none; } }

/* ── Buttons ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-8);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-8);
  background: var(--color-surface);
  color: var(--color-primary);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-primary);
  cursor: pointer;
}
.btn-secondary:hover { background: var(--color-primary-light); }

/* ── Hero ── */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-2) 100%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: var(--content-narrow);
  margin-inline: auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-5);
}
.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  letter-spacing: -0.03em;
}
.hero-title em {
  font-style: normal;
  color: var(--color-primary);
}
.hero-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}
.hero-bg-shapes { position: absolute; inset: 0; pointer-events: none; }
.shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.06;
  background: var(--color-primary);
}
.shape-1 { width: 500px; height: 500px; top: -200px; right: -150px; }
.shape-2 { width: 300px; height: 300px; bottom: -100px; left: -80px; }

/* ── Ad Slot ── */
.ad-slot { padding-block: var(--space-4); }
.ad-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 90px;
  background: var(--color-surface-offset);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── Section Headings ── */
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.section-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-10);
}

/* ── Tools Section ── */
.tools-section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}
.tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 600px) { .tools-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .tools-grid { grid-template-columns: repeat(3, 1fr); } }

.tool-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  position: relative;
}
.tool-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.tool-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: var(--radius-lg);
  background: var(--icon-bg, var(--color-primary-light));
  color: var(--icon-color, var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3);
}
.tool-icon svg { width: 22px; height: 22px; }
.tool-info { flex: 1; min-width: 0; }
.tool-info h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-1);
  line-height: 1.3;
}
.tool-info p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: 100%;
}
.tool-arrow {
  font-size: var(--text-lg);
  color: var(--color-text-faint);
  align-self: center;
  flex-shrink: 0;
  transition: transform var(--transition), color var(--transition);
}
.tool-card:hover .tool-arrow {
  color: var(--color-primary);
  transform: translateX(3px);
}

/* ── Resources Section ── */
.resources-section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.resources-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 700px) { .resources-grid { grid-template-columns: repeat(3, 1fr); } }

.resource-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}
.resource-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.resource-card--ebook { cursor: default; }
.resource-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2);
}
.resource-icon svg { width: 20px; height: 20px; }
.resource-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-1);
  line-height: 1.3;
}
.resource-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  max-width: 100%;
}
.resource-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
}
.resource-link--cta {
  display: inline-block;
  padding: var(--space-2) var(--space-5);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
}

/* ── Email Section ── */
.email-section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-16));
  background: var(--color-primary);
}
.email-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  align-items: center;
  text-align: center;
}
@media (min-width: 768px) {
  .email-inner { flex-direction: row; text-align: left; }
}
.email-text h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}
.email-text p { color: rgba(255,255,255,0.8); font-size: var(--text-base); max-width: 40ch; }
.email-form {
  display: flex;
  gap: var(--space-2);
  flex-shrink: 0;
  flex-wrap: wrap;
  justify-content: center;
}
@media (min-width: 768px) { .email-form { margin-left: auto; justify-content: flex-end; } }
.email-form input {
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  border: none;
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: var(--text-sm);
  min-width: 220px;
  backdrop-filter: blur(4px);
}
.email-form input::placeholder { color: rgba(255,255,255,0.6); }
.email-form input:focus { outline: 2px solid rgba(255,255,255,0.8); background: rgba(255,255,255,0.2); }
.email-form .btn-primary {
  background: #fff;
  color: var(--color-primary);
}
.email-form .btn-primary:hover { background: rgba(255,255,255,0.9); }

/* ── Footer ── */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: clamp(var(--space-12), 5vw, var(--space-16));
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}
@media (min-width: 768px) { .footer-inner { grid-template-columns: 2fr 1fr 1fr; } }
.footer-brand .logo-link { margin-bottom: var(--space-3); }
.footer-brand p { font-size: var(--text-sm); color: var(--color-text-muted); max-width: 30ch; line-height: 1.6; }
.footer-links h4 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.footer-links ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); }
.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}
.footer-links a:hover { color: var(--color-primary); }
.footer-bottom {
  padding-top: var(--space-8);
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ── Tool Page Shared Styles ── */
.tool-page { padding-block: clamp(var(--space-10), 5vw, var(--space-16)); }
.tool-page-header { margin-bottom: var(--space-8); }
.tool-breadcrumb {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}
.tool-breadcrumb a { color: var(--color-primary); text-decoration: none; }
.tool-page-header h1 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}
.tool-page-header p { color: var(--color-text-muted); font-size: var(--text-base); max-width: 60ch; }

.tool-card-main {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: clamp(var(--space-6), 4vw, var(--space-10));
  box-shadow: var(--shadow-md);
  max-width: 640px;
}

.form-group { margin-bottom: var(--space-5); }
.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.form-group input,
.form-group select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--text-base);
  font-family: var(--font-body);
}
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }

.result-box {
  margin-top: var(--space-6);
  padding: var(--space-6);
  background: var(--color-primary-light);
  border: 1.5px solid var(--color-primary-highlight);
  border-radius: var(--radius-xl);
  display: none;
}
.result-box.visible { display: block; }
.result-label { font-size: var(--text-xs); font-weight: 600; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: var(--space-1); }
.result-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.result-note { font-size: var(--text-sm); color: var(--color-text-muted); }
.result-note strong { color: var(--color-text); }

.calc-btn {
  width: 100%;
  padding: var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-xl);
  cursor: pointer;
  margin-top: var(--space-2);
}
.calc-btn:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.calc-btn:active { transform: none; }

.disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-5);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-border);
}

.other-tools-section {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}
.other-tools-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-5);
}
.mini-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-3);
}
.mini-tool-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 500;
}
.mini-tool-card:hover { border-color: var(--color-primary); color: var(--color-primary); }
.mini-tool-icon {
  width: 32px; height: 32px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.mini-tool-icon svg { width: 16px; height: 16px; }