/* ========================================
   Rectalyze Landing Page — Base Styles
   ======================================== */

/* ---- CSS Custom Properties ---- */
:root {
  /* Colors */
  --color-bg: #0a0f1a;
  --color-surface: #111827;
  --color-surface-elevated: #1a2236;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-accent: #38bdf8;
  --color-accent-dark: #0ea5e9;
  --color-success: #34d399;
  --color-warning: #fbbf24;
  --color-danger: #f87171;
  --color-border: #334155;

  /* Typography */
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 3rem;
  --font-size-4xl: 4rem;
  --line-height-tight: 1.2;
  --line-height-normal: 1.6;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Layout */
  --container-max: 1200px;
  --header-height: 64px;
  --section-padding-y: var(--space-24);
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
}

/* ---- CSS Reset (minimal) ---- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover,
a:focus {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

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

/* ---- Utility: visually hidden ---- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ========================================
   Layout System (Mobile-First)
   ======================================== */

html {
  scroll-padding-top: var(--header-height);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-8);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-12);
  }
}

.section {
  padding-block: var(--section-padding-y);
}

.section-alt {
  background-color: var(--color-surface);
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 {
  grid-template-columns: 1fr;
}

.grid-3 {
  grid-template-columns: 1fr;
}

.grid-4 {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-4 {
  gap: var(--space-4);
}

.gap-6 {
  gap: var(--space-6);
}

.gap-8 {
  gap: var(--space-8);
}

.text-center {
  text-align: center;
}

/* ========================================
   Placeholder Component
   ======================================== */

.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-surface-elevated);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-family: var(--font-mono);
  text-align: center;
  min-height: 120px;
  overflow: hidden;
}

.placeholder::before {
  content: attr(data-label);
  padding: var(--space-4);
}

.placeholder-16-9 {
  aspect-ratio: 16 / 9;
}

.placeholder-4-3 {
  aspect-ratio: 4 / 3;
}

.placeholder-9-16 {
  aspect-ratio: 9 / 16;
}

.placeholder-1-1 {
  aspect-ratio: 1 / 1;
}

.placeholder-circle {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-full);
}

/* ========================================
   Site Header & Navigation
   ======================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: rgba(10, 15, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .site-nav {
    padding-inline: var(--space-8);
  }
}

@media (min-width: 1024px) {
  .site-nav {
    padding-inline: var(--space-12);
  }
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.logo:hover,
.logo:focus {
  color: var(--color-accent);
  text-decoration: none;
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text);
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background-color: currentColor;
  position: relative;
  transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  transition: transform var(--transition-base);
}

.hamburger::before {
  top: -7px;
}

.hamburger::after {
  top: 7px;
}

.nav-toggle[aria-expanded="true"] .hamburger {
  background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-menu {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  flex-direction: column;
  gap: 0;
  list-style: none;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4);
}

.nav-menu.is-open {
  display: flex;
}

@media (min-width: 768px) {
  .nav-menu {
    display: flex !important;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: var(--space-6);
    background-color: transparent;
    border: none;
    padding: 0;
  }
}

.nav-menu a {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.nav-menu a:hover,
.nav-menu a:focus {
  color: var(--color-text);
  background-color: var(--color-surface-elevated);
  text-decoration: none;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background-color: var(--color-accent);
  color: var(--color-bg) !important;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.nav-cta:hover,
.nav-cta:focus {
  background-color: var(--color-accent-dark);
  color: var(--color-bg) !important;
  text-decoration: none;
}

/* ========================================
   Typography Utilities
   ======================================== */

.heading-1 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: var(--line-height-tight);
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.heading-2 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.heading-3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

.lead {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 65ch;
}

.body {
  color: var(--color-text-muted);
  max-width: 65ch;
}

@media (min-width: 768px) {
  .heading-1 {
    font-size: var(--font-size-4xl);
  }

  .heading-2 {
    font-size: var(--font-size-3xl);
  }
}

/* ========================================
   Hero Section
   ======================================== */

.section-hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height));
  padding-block: var(--space-16);
}

.section-hero .heading-1 {
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   Technology Section
   ======================================== */

#technology article {
  display: flex;
  flex-direction: column;
}

#technology article figure {
  flex-shrink: 0;
}

#technology .placeholder-9-16 {
  max-height: 320px;
  margin-inline: auto;
}

/* ========================================
   Metrics Section
   ======================================== */

.metric-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-6);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.metric-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 140px;
  height: 140px;
  margin-bottom: var(--space-4);
}

.metric-value {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-text);
}

.metric-unit {
  font-size: 0.6em;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-left: 0.125em;
}

.metric-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
}

.metric-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
  max-width: 28ch;
}

.metric-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
}

.metric-status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
}

.status-optimal {
  background-color: rgba(52, 211, 153, 0.15);
  color: var(--color-success);
}

.status-optimal::before {
  background-color: var(--color-success);
}

.status-normal {
  background-color: rgba(56, 189, 248, 0.15);
  color: var(--color-accent);
}

.status-normal::before {
  background-color: var(--color-accent);
}

.status-low {
  background-color: rgba(52, 211, 153, 0.15);
  color: var(--color-success);
}

.status-low::before {
  background-color: var(--color-success);
}

.status-elevated {
  background-color: rgba(248, 113, 113, 0.15);
  color: var(--color-danger);
}

.status-elevated::before {
  background-color: var(--color-danger);
}

/* ---- Ring Visual (conic-gradient) ---- */
.metric-ring {
  border-radius: var(--radius-full);
  background: conic-gradient(
    var(--color-accent) 0% var(--ring-value),
    var(--color-border) var(--ring-value) 100%
  );
  padding: 8px;
}

.metric-ring .metric-value {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background-color: var(--color-surface);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xl);
}

.metric-ring-alt {
  background: conic-gradient(
    var(--color-success) 0% var(--ring-value),
    var(--color-border) var(--ring-value) 100%
  );
}

/* ---- Gauge Visual (SVG) ---- */
.metric-gauge {
  width: 100%;
  height: auto;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.gauge-value {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--font-size-xl);
}

/* ---- Bar Visual ---- */
.metric-bar-container {
  flex-direction: column;
  justify-content: flex-end;
  width: 100%;
  max-width: 140px;
  height: 120px;
  background-color: var(--color-surface-elevated);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  overflow: hidden;
}

.metric-bar {
  width: 100%;
  height: var(--bar-width);
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  border-radius: var(--radius-sm);
  transition: height var(--transition-base);
}

.bar-value {
  position: absolute;
  top: var(--space-3);
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--font-size-xl);
}

/* ---- Number Visual ---- */
.metric-number {
  background-color: var(--color-surface-elevated);
  border-radius: var(--radius-md);
}

.number-value {
  font-size: var(--font-size-3xl);
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-success) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   Investors Section
   ======================================== */

.profile-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-6);
}

.profile-card figure {
  width: 120px;
  height: 120px;
  flex-shrink: 0;
}

.profile-card .placeholder-circle {
  width: 100%;
  height: 100%;
}

.profile-card figure img {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.profile-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-4);
}

.profile-title {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-1);
}

.profile-bio {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  max-width: 28ch;
}

/* ========================================
   Reviews Section
   ======================================== */

.testimonial-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-8);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.testimonial-card figure {
  width: 80px;
  height: 80px;
  flex-shrink: 0;
}

.testimonial-card .placeholder-circle {
  width: 100%;
  height: 100%;
}

.testimonial-card figure img {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.testimonial-quote {
  font-size: var(--font-size-lg);
  font-style: italic;
  color: var(--color-text);
  line-height: var(--line-height-normal);
  margin-top: var(--space-6);
  max-width: 36ch;
}

.testimonial-quote::before {
  content: '\201C';
  font-size: 2em;
  line-height: 0.1;
  vertical-align: -0.3em;
  color: var(--color-accent);
  margin-right: var(--space-1);
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-top: var(--space-6);
  font-style: normal;
}

.author-name {
  font-weight: 600;
  color: var(--color-text);
}

.author-role {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ========================================
   Footer
   ======================================== */

.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.site-footer .heading-2 {
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   Medical Section — Background, Warning & Disclaimer
   ======================================== */

#medical {
  position: relative;
  background-image: url('assets/images/medical-background.png');
  background-size: cover;
  background-position: center;
}

#medical::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(10, 15, 26, 0.75);
  z-index: 0;
}

#medical .container {
  position: relative;
  z-index: 1;
}

.warning-callout {
  margin-top: var(--space-8);
  padding: var(--space-6);
  background-color: hsl(30, 90%, 96%);
  border-left: 4px solid hsl(30, 80%, 55%);
  border-radius: var(--radius-md);
}

.warning-callout p {
  margin: 0;
  color: hsl(30, 60%, 25%);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
}

.disclaimer {
  margin-top: var(--space-8);
  padding: var(--space-6);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.disclaimer p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
}

/* ========================================
   Manufacturing Section — Background
   ======================================== */

#manufacturing {
  position: relative;
  background-image: url('assets/images/manufacturing-background.png');
  background-size: cover;
  background-position: center;
}

#manufacturing::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(10, 15, 26, 0.75);
  z-index: 0;
}

#manufacturing .container {
  position: relative;
  z-index: 1;
}