:root {
  /* Colors */
  --color-background: rgba(252, 252, 249, 1);
  --color-surface: rgba(255, 255, 253, 1);
  --color-text: rgba(19, 52, 59, 1);
  --color-text-secondary: rgba(98, 108, 113, 1);
  --color-primary: rgba(33, 128, 141, 1);
  --color-primary-hover: rgba(29, 116, 128, 1);
  --color-primary-active: rgba(26, 104, 115, 1);
  --color-secondary: rgba(94, 82, 64, 0.12);
  --color-secondary-hover: rgba(94, 82, 64, 0.2);
  --color-secondary-active: rgba(94, 82, 64, 0.25);
  --color-border: rgba(94, 82, 64, 0.2);
  --color-btn-primary-text: rgba(252, 252, 249, 1);
  --color-card-border: rgba(94, 82, 64, 0.12);
  --color-card-border-inner: rgba(94, 82, 64, 0.12);
  --color-error: rgba(192, 21, 47, 1);
  --color-success: rgba(33, 128, 141, 1);
  --color-warning: rgba(168, 75, 47, 1);
  --color-info: rgba(98, 108, 113, 1);
  --color-focus-ring: rgba(33, 128, 141, 0.4);
  --color-select-caret: rgba(19, 52, 59, 0.8);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for opacity control */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04),
    0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: rgba(31, 33, 33, 1);
    --color-surface: rgba(38, 40, 40, 1);
    --color-text: rgba(245, 245, 245, 1);
    --color-text-secondary: rgba(167, 169, 169, 0.7);
    --color-primary: rgba(50, 184, 198, 1);
    --color-primary-hover: rgba(45, 166, 178, 1);
    --color-primary-active: rgba(41, 150, 161, 1);
    --color-secondary: rgba(119, 124, 124, 0.15);
    --color-secondary-hover: rgba(119, 124, 124, 0.25);
    --color-secondary-active: rgba(119, 124, 124, 0.3);
    --color-border: rgba(119, 124, 124, 0.3);
    --color-error: rgba(255, 84, 89, 1);
    --color-success: rgba(50, 184, 198, 1);
    --color-warning: rgba(230, 129, 97, 1);
    --color-info: rgba(167, 169, 169, 1);
    --color-focus-ring: rgba(50, 184, 198, 0.4);
    --color-btn-primary-text: rgba(19, 52, 59, 1);
    --color-card-border: rgba(119, 124, 124, 0.2);
    --color-card-border-inner: rgba(119, 124, 124, 0.15);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
      inset 0 -1px 0 rgba(0, 0, 0, 0.15);
    --button-border-secondary: rgba(119, 124, 124, 0.2);
    --color-border-secondary: rgba(119, 124, 124, 0.2);
    --color-select-caret: rgba(245, 245, 245, 0.8);

    /* Common style patterns - updated for dark mode */
    --focus-ring: 0 0 0 3px var(--color-focus-ring);
    --focus-outline: 2px solid var(--color-primary);
    --status-bg-opacity: 0.15;
    --status-border-opacity: 0.25;
    --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

    /* RGB versions for dark mode */
    --color-success-rgb: 50, 184, 198;
    --color-error-rgb: 255, 84, 89;
    --color-warning-rgb: 230, 129, 97;
    --color-info-rgb: 167, 169, 169;
  }
}

/* Data attribute for manual theme switching */
[data-color-scheme="dark"] {
  --color-background: rgba(31, 33, 33, 1);
  --color-surface: rgba(38, 40, 40, 1);
  --color-text: rgba(245, 245, 245, 1);
  --color-text-secondary: rgba(167, 169, 169, 0.7);
  --color-primary: rgba(50, 184, 198, 1);
  --color-primary-hover: rgba(45, 166, 178, 1);
  --color-primary-active: rgba(41, 150, 161, 1);
  --color-secondary: rgba(119, 124, 124, 0.15);
  --color-secondary-hover: rgba(119, 124, 124, 0.25);
  --color-secondary-active: rgba(119, 124, 124, 0.3);
  --color-border: rgba(119, 124, 124, 0.3);
  --color-error: rgba(255, 84, 89, 1);
  --color-success: rgba(50, 184, 198, 1);
  --color-warning: rgba(230, 129, 97, 1);
  --color-info: rgba(167, 169, 169, 1);
  --color-focus-ring: rgba(50, 184, 198, 0.4);
  --color-btn-primary-text: rgba(19, 52, 59, 1);
  --color-card-border: rgba(119, 124, 124, 0.15);
  --color-card-border-inner: rgba(119, 124, 124, 0.15);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.15);
  --color-border-secondary: rgba(119, 124, 124, 0.2);
  --color-select-caret: rgba(245, 245, 245, 0.8);

  /* Common style patterns - updated for dark mode */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for dark mode */
  --color-success-rgb: 50, 184, 198;
  --color-error-rgb: 255, 84, 89;
  --color-warning-rgb: 230, 129, 97;
  --color-info-rgb: 167, 169, 169;
}

[data-color-scheme="light"] {
  --color-background: rgba(252, 252, 249, 1);
  --color-surface: rgba(255, 255, 253, 1);
  --color-text: rgba(19, 52, 59, 1);
  --color-text-secondary: rgba(98, 108, 113, 1);
  --color-primary: rgba(33, 128, 141, 1);
  --color-primary-hover: rgba(29, 116, 128, 1);
  --color-primary-active: rgba(26, 104, 115, 1);
  --color-secondary: rgba(94, 82, 64, 0.12);
  --color-secondary-hover: rgba(94, 82, 64, 0.2);
  --color-secondary-active: rgba(94, 82, 64, 0.25);
  --color-border: rgba(94, 82, 64, 0.2);
  --color-btn-primary-text: rgba(252, 252, 249, 1);
  --color-card-border: rgba(94, 82, 64, 0.12);
  --color-card-border-inner: rgba(94, 82, 64, 0.12);
  --color-error: rgba(192, 21, 47, 1);
  --color-success: rgba(33, 128, 141, 1);
  --color-warning: rgba(168, 75, 47, 1);
  --color-info: rgba(98, 108, 113, 1);
  --color-focus-ring: rgba(33, 128, 141, 0.4);

  /* RGB versions for light mode */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;
}

/* Base styles */
html {
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--color-background);
  color: var(--color-text);
  min-height: 100vh;
  overflow-x: hidden;
}


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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
}
h2 {
  font-size: var(--font-size-3xl);
}
h3 {
  font-size: var(--font-size-2xl);
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-md);
}

p {
  margin: 0 0 var(--space-16) 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

a:hover {
  color: var(--color-primary-hover);
}

code,
pre {
  font-family: var(--font-family-mono);
  font-size: calc(var(--font-size-base) * 0.95);
  background-color: var(--color-secondary);
  border-radius: var(--radius-sm);
}

code {
  padding: var(--space-1) var(--space-4);
}

pre {
  padding: var(--space-16);
  margin: var(--space-16) 0;
  overflow: auto;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  text-decoration: none;
  position: relative;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

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

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

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

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

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

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

.btn--outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

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

.btn--sm {
  padding: var(--space-4) var(--space-12);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn--lg {
  padding: var(--space-10) var(--space-20);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
}

.btn--full-width {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Form elements */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

textarea.form-control {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
}

select.form-control {
  padding: var(--space-8) var(--space-12);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: var(--select-caret-light);
  background-repeat: no-repeat;
  background-position: right var(--space-12) center;
  background-size: 16px;
  padding-right: var(--space-32);
}

/* Add a dark mode specific caret */
@media (prefers-color-scheme: dark) {
  select.form-control {
    background-image: var(--select-caret-dark);
  }
}

/* Also handle data-color-scheme */
[data-color-scheme="dark"] select.form-control {
  background-image: var(--select-caret-dark);
}

[data-color-scheme="light"] select.form-control {
  background-image: var(--select-caret-light);
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: var(--focus-outline);
}

.form-label {
  display: block;
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.form-group {
  margin-bottom: var(--space-16);
}

/* Card component */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--duration-normal) var(--ease-standard);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card__body {
  padding: var(--space-16);
}

.card__header,
.card__footer {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-card-border-inner);
}

/* Status indicators - simplified with CSS variables */
.status {
  display: inline-flex;
  align-items: center;
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.status--success {
  background-color: rgba(
    var(--color-success-rgb, 33, 128, 141),
    var(--status-bg-opacity)
  );
  color: var(--color-success);
  border: 1px solid
    rgba(var(--color-success-rgb, 33, 128, 141), var(--status-border-opacity));
}

.status--error {
  background-color: rgba(
    var(--color-error-rgb, 192, 21, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-error);
  border: 1px solid
    rgba(var(--color-error-rgb, 192, 21, 47), var(--status-border-opacity));
}

.status--warning {
  background-color: rgba(
    var(--color-warning-rgb, 168, 75, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-warning);
  border: 1px solid
    rgba(var(--color-warning-rgb, 168, 75, 47), var(--status-border-opacity));
}

.status--info {
  background-color: rgba(
    var(--color-info-rgb, 98, 108, 113),
    var(--status-bg-opacity)
  );
  color: var(--color-info);
  border: 1px solid
    rgba(var(--color-info-rgb, 98, 108, 113), var(--status-border-opacity));
}

/* Container layout */
.container {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: var(--space-16);
  padding-left: var(--space-16);
}

@media (min-width: 640px) {
  .container {
    max-width: var(--container-sm);
  }
}
@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
}
@media (min-width: 1024px) {
  .container {
    max-width: var(--container-lg);
  }
}
@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
  }
}

/* Utility classes */
.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}
.gap-4 {
  gap: var(--space-4);
}
.gap-8 {
  gap: var(--space-8);
}
.gap-16 {
  gap: var(--space-16);
}

.m-0 {
  margin: 0;
}
.mt-8 {
  margin-top: var(--space-8);
}
.mb-8 {
  margin-bottom: var(--space-8);
}
.mx-8 {
  margin-left: var(--space-8);
  margin-right: var(--space-8);
}
.my-8 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.p-0 {
  padding: 0;
}
.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}
.px-8 {
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}
.py-16 {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}
.px-16 {
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

.block {
  display: block;
}
.hidden {
  display: none;
}

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

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

/* Dark mode specifics */
[data-color-scheme="dark"] .btn--outline {
  border: 1px solid var(--color-border-secondary);
}

@font-face {
  font-family: 'FKGroteskNeue';
  src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2')
    format('woff2');
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--color-background);
    color: var(--color-text);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Presentation container */
.presentation-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.presentation-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-surface);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--color-border);
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--color-secondary);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 4.55%; /* 1/22 slides */
}

.slide-counter {
    text-align: center;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
}

/* Slides container */
.slides-container {
    flex: 1;
    padding-top: 5rem;
    padding-bottom: 5rem;
}

.slide {
    display: none;
    min-height: calc(100vh - 10rem);
    padding: 2rem;
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.4s ease;
}

.slide.active {
    display: flex;
    opacity: 1;
    transform: translateX(0);
}

.slide-content {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100%;
}

/* Typography */
.slide-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-align: center;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.slide-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 2rem;
    text-align: center;
    opacity: 0.9;
    line-height: 1.4;
}

/* Slide 1: Title slide */
.slide[data-slide="1"] .slide-content {
    text-align: center;
    justify-content: center;
}

.slide-info {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    margin-top: 3rem;
    border: 1px solid var(--color-border);
}

.slide-info p {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--color-text);
}

/* Slide 2: Objectives */
.objectives-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.objective-item {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.objective-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.objective-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.objective-item p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

/* Slide 3: ISO Standard */
.iso-standard {
    background: var(--color-surface);
    padding: 3rem;
    border-radius: 1.5rem;
    border: 1px solid var(--color-border);
    text-align: center;
}

.iso-standard h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.standard-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.standard-benefits {
    text-align: left;
    max-width: 600px;
    margin: 0 auto;
}

.standard-benefits h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.standard-benefits ul {
    list-style: none;
    padding: 0;
}

.standard-benefits li {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.5;
}

.standard-benefits li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Slide 4: Eight Characteristics */
.characteristics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.characteristic-card {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.characteristic-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.characteristic-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.characteristic-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Slides 5-12: Characteristic details */
.characteristic-detail {
    max-width: 1000px;
    margin: 0 auto;
}

.definition {
    font-size: 1.3rem;
    line-height: 1.6;
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--color-surface);
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    font-style: italic;
    color: var(--color-text);
}

.subcharacteristics h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--color-text);
}

.subchar-list {
    display: grid;
    gap: 1.5rem;
}

.subchar-item {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
}

.subchar-item h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.subchar-item p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

/* Slide 13: Processes */
.processes-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.process-item {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    text-align: center;
    transition: transform 0.3s ease;
}

.process-item:hover {
    transform: translateY(-5px);
}

.process-item h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.process-item p {
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text-secondary);
}

/* Slide 14: Metrics */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.metric-card {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    text-align: center;
    transition: transform 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-5px);
}

.metric-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.metric-card p {
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 1.5rem;
    color: var(--color-text-secondary);
}

.metric-formula {
    background: var(--color-secondary);
    padding: 1rem;
    border-radius: 0.5rem;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

/* Slide 15: Tools */
.tools-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tool-card {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
}

.tool-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.tool-description {
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 1.5rem;
    color: var(--color-text-secondary);
}

.tool-features h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.tool-features ul,
.tools-list {
    list-style: none;
    padding: 0;
}

.tool-features li,
.tools-list li {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.5;
}

.tool-features li:before,
.tools-list li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Slide 16: Methodologies */
.methodologies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.methodology-card {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
}

.methodology-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-primary);
    text-align: center;
}

.methodology-card p {
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 1.5rem;
    color: var(--color-text-secondary);
    text-align: center;
}

.cmmi-levels {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.level {
    background: var(--color-secondary);
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    text-align: center;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.six-sigma-phases {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.phase {
    background: var(--color-secondary);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.85rem;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.methodology-card ul {
    list-style: none;
    padding: 0;
}

.methodology-card li {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.5;
}

.methodology-card li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Slide 17: Clean Code */
.clean-code-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.principles-section h3,
.best-practices h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--color-primary);
    text-align: center;
}

.principles-grid {
    display: grid;
    gap: 1.5rem;
}

.principle-item {
    background: var(--color-surface);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
}

.principle-item h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

.principle-item p {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--color-text-secondary);
}

.best-practices {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
}

.best-practices ul {
    list-style: none;
    padding: 0;
}

.best-practices li {
    font-size: 1rem;
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.5;
}

.best-practices li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Slide 18: DevOps */
.devops-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.devops-benefits h3,
.devops-practices h3 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--color-primary);
    text-align: center;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.benefit-item {
    background: var(--color-surface);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    text-align: center;
}

.benefit-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

.benefit-item p {
    font-size: 0.9rem;
    line-height: 1.4;
    color: var(--color-text-secondary);
}

.devops-practices {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
}

.devops-practices ul {
    list-style: none;
    padding: 0;
}

.devops-practices li {
    font-size: 1rem;
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.5;
}

.devops-practices li:before {
    content: "⚙️";
    position: absolute;
    left: 0;
}

/* Slide 19: Lifecycle */
.lifecycle-content {
    margin-top: 2rem;
}

.phase-quality h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--color-primary);
    text-align: center;
}

.phases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.phase-item {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    text-align: center;
}

.phase-item h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.phase-item ul {
    list-style: none;
    padding: 0;
    text-align: left;
}

.phase-item li {
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.4;
}

.phase-item li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Slide 20: Activities */
.activities-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.activity-item {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    transition: transform 0.3s ease;
}

.activity-item:hover {
    transform: translateY(-5px);
}

.activity-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.activity-item p {
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    color: var(--color-text-secondary);
}

.activity-details {
    background: var(--color-secondary);
    padding: 1rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

/* Slide 21: Conclusions */
.conclusions-content {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
}

.conclusion-item {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    text-align: center;
}

.conclusion-item h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.conclusion-item p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.key-takeaways {
    background: var(--color-secondary);
    padding: 2rem;
    border-radius: 1rem;
    border: 2px solid var(--color-border);
    margin-top: 2rem;
}

.key-takeaways h3 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--color-text);
    text-align: center;
}

.key-takeaways ul {
    list-style: none;
    padding: 0;
    max-width: 800px;
    margin: 0 auto;
}

.key-takeaways li {
    font-size: 1rem;
    margin-bottom: 1rem;
    padding-left: 2rem;
    position: relative;
    line-height: 1.6;
}

.key-takeaways li:before {
    content: "★";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-size: 1.2rem;
}

/* Slide 22: References */
.references-content {
    margin-top: 2rem;
}

.references-list {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    margin-bottom: 2rem;
}

.reference-item {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

.reference-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.contact-info {
    background: var(--color-secondary);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    text-align: center;
}

.contact-info h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.contact-info p {
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text-secondary);
}

/* Navigation */
.presentation-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-surface);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--color-border);
    z-index: 1000;
}

.nav-btn {
    background: var(--color-secondary);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.nav-btn:hover:not(:disabled) {
    background: var(--color-secondary-hover);
    transform: translateY(-2px);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.slide-list-container {
    position: relative;
}

.slide-list {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-surface);
    backdrop-filter: blur(15px);
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    padding: 1rem;
    margin-bottom: 1rem;
    max-height: 60vh;
    overflow-y: auto;
    width: 400px;
    box-shadow: var(--shadow-md);
}

.slide-list.hidden {
    display: none;
}

.slide-list-item {
    display: block;
    width: 100%;
    background: transparent;
    border: none;
    color: var(--color-text);
    text-align: left;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-bottom: 0.25rem;
}

.slide-list-item:hover {
    background: var(--color-secondary);
}

.slide-list-item.active {
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    border: 1px solid var(--color-primary);
}

/* Responsive design */
@media (max-width: 1024px) {
    .slide-title {
        font-size: 2.5rem;
    }
    
    .slide-subtitle {
        font-size: 1.3rem;
    }
    
    .clean-code-content,
    .devops-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .slide {
        padding: 1rem;
    }
    
    .slide-title {
        font-size: 2rem;
    }
    
    .slide-subtitle {
        font-size: 1.1rem;
    }
    
    .presentation-nav {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    
    .slide-list {
        width: 300px;
    }
    
    .characteristics-grid,
    .objectives-list,
    .processes-content,
    .metrics-grid,
    .tools-content,
    .methodologies-grid,
    .phases-grid,
    .activities-content {
        grid-template-columns: 1fr;
    }
    
    .slides-container {
        padding-top: 6rem;
        padding-bottom: 8rem;
    }
}

@media (max-width: 480px) {
    .slide-title {
        font-size: 1.5rem;
    }
    
    .slide-subtitle {
        font-size: 1rem;
    }
    
    .definition {
        font-size: 1.1rem;
        padding: 1.5rem;
    }
    
    .characteristic-card,
    .objective-item,
    .process-item,
    .metric-card,
    .tool-card,
    .methodology-card,
    .phase-item,
    .activity-item,
    .conclusion-item {
        padding: 1.5rem;
    }
    
    .slide-list {
        width: 250px;
    }
}

/* Custom scrollbar for slide list */
.slide-list::-webkit-scrollbar {
    width: 6px;
}

.slide-list::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 1);
    border-radius: 3px;
}

.slide-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

.slide-list::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}