/* ============================================================================
   Salesforce-Style Portfolio – Design System
   Author: Refactored for Brooke Alexis Hanger
   Version: 2.0.0
   ============================================================================ */

/* ============================================================================
   1. Design Tokens (CSS Custom Properties)
   ============================================================================ */

:root {
  /* Colors – Salesforce-inspired palette */
  --color-primary: #0176d3;
  --color-primary-dark: #014486;
  --color-primary-light: #e3f3ff;
  --color-primary-hover: #005fb2;
  
  --color-bg: #ffffff;
  --color-surface: #fafafa;
  --color-surface-raised: #f4f6f9;
  --color-text: #181818;
  --color-text-muted: #706e6b;
  --color-text-light: #a8a29e;
  --color-border: #dddbda;
  --color-border-light: #e5e5e5;
  
  --color-success: #2e844a;
  --color-warning: #fe9339;
  --color-error: #ea001e;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #0176d3 0%, #005fb2 100%);
  --gradient-surface: linear-gradient(180deg, #ffffff 0%, #fafafa 100%);
  
  /* Spacing – 8px base unit */
  --space-xs: 0.5rem;    /* 8px */
  --space-sm: 1rem;      /* 16px */
  --space-md: 1.5rem;    /* 24px */
  --space-lg: 2rem;      /* 32px */
  --space-xl: 3rem;      /* 48px */
  --space-2xl: 4rem;     /* 64px */
  --space-3xl: 6rem;     /* 96px */
  
  /* Typography – Fluid with clamp() for responsiveness */
  --font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);     /* 14px-16px */
  --font-size-lg: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);         /* 16px-18px */
  --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);       /* 20px-24px */
  --font-size-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);          /* 24px-32px */
  --font-size-3xl: clamp(2rem, 1.5rem + 2.5vw, 2.5rem);          /* 32px-40px */
  --font-size-4xl: clamp(2.5rem, 2rem + 2.5vw, 3rem);            /* 40px-48px */
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;
  
  /* Elevation (shadows) */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.12);
  
  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Motion */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Layout – Mobile-first breakpoints */
  --container-max-width: 1200px;
  --header-height: 64px;
  --touch-target: 44px;
  
  /* Breakpoints (mobile-first) */
  --breakpoint-sm: 600px;
  --breakpoint-md: 900px;
  --breakpoint-lg: 1200px;
  --breakpoint-xl: 1440px;
}

/* Respect user motion preferences */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================================
   2. CSS Reset & Base Styles
   ============================================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

/* Anchor scroll margin for sticky header */
:target,
[id] {
  scroll-margin-top: calc(var(--header-height) + var(--space-md));
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

h1 {
  font-size: clamp(var(--font-size-2xl), 5vw, var(--font-size-4xl));
}

h2 {
  font-size: clamp(var(--font-size-xl), 4vw, var(--font-size-3xl));
}

h3 {
  font-size: clamp(var(--font-size-lg), 3vw, var(--font-size-xl));
}

h4 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--space-md);
  line-height: var(--line-height-relaxed);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  transition: color var(--transition-fast);
}

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

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

strong {
  font-weight: var(--font-weight-semibold);
}

/* Lists */
ul, ol {
  padding-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

li {
  margin-bottom: var(--space-xs);
}

/* Images & Media */
img, video, canvas, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

picture {
  display: block;
}

/* ============================================================================
   3. Layout Components
   ============================================================================ */

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-lg);
  }
}

/* Section */
.section {
  padding: var(--space-2xl) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-3xl) 0;
  }
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-lg);
}

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

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

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

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* ============================================================================
   4. Header & Navigation
   ============================================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.brand {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Skip link (accessibility) */
.skip-link {
  position: absolute;
  left: -9999px;
  top: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-primary);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  z-index: 10000;
}

.skip-link:focus {
  left: var(--space-sm);
}

/* Mobile nav toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: var(--touch-target);
  height: var(--touch-target);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  z-index: 10;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: var(--radius-sm);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Navigation */
.nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  border-radius: var(--radius-md);
}

.nav a:hover {
  color: var(--color-primary);
  background-color: var(--color-surface);
}

.nav a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Mobile menu overlay */
.menu-overlay {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  z-index: 999;
  overflow-y: auto;
  padding: var(--space-lg);
}

.menu-overlay[hidden] {
  display: none;
}

body.scroll-lock {
  overflow: hidden;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: var(--space-xs);
  margin-left: var(--space-md);
}

.lang-switcher button {
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: var(--touch-target);
}

.lang-switcher button:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.lang-switcher button.active,
.lang-switcher button[aria-pressed="true"] {
  color: var(--color-bg);
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.lang-switcher.mobile {
  flex-direction: column;
  margin: var(--space-lg) 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.lang-switcher.mobile button {
  width: 100%;
  justify-content: center;
}

/* Scrollspy active state */
.nav a.active {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* Desktop navigation */
@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }
  
  #primary-nav {
    display: block !important;
  }
  
  .nav ul {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
  }
  
  .menu-overlay {
    display: none !important;
  }
}

/* ============================================================================
   5. Hero Section
   ============================================================================ */

.hero-section {
  text-align: center;
  padding: var(--space-2xl) 0;
}

@media (min-width: 768px) {
  .hero-section {
    padding: var(--space-3xl) 0;
  }
}

.hero-section h1 {
  margin-bottom: var(--space-sm);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto var(--space-md);
  line-height: var(--line-height-relaxed);
}

.hero-location {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
}

.avatar {
  width: 160px;
  height: 160px;
  margin: 0 auto var(--space-lg);
  border-radius: var(--radius-full);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* CTA Buttons */
.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  margin-top: var(--space-xl);
}

.cta-button {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  min-width: 140px;
  text-align: center;
}

.cta-button:not(.secondary) {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.cta-button:not(.secondary):hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.cta-button.secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.cta-button.secondary:hover {
  background: var(--color-primary-light);
}

/* ============================================================================
   6. Cards
   ============================================================================ */

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card h3 {
  margin-bottom: var(--space-sm);
}

.card p:last-child {
  margin-bottom: 0;
}

/* Expertise Card */
.expertise-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

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

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

.expertise-card {
  background: var(--gradient-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition-base);
}

.expertise-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.expertise-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-md);
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

/* Stats Card */
.stats-card {
  text-align: center;
  background: var(--gradient-surface);
  border: 1px solid var(--color-border-light);
}

.metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.metric-number {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: 1;
}

.metric-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Project Card */
.project-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-card .card-header {
  margin-bottom: var(--space-md);
}

.project-card .card-body {
  flex: 1;
}

.project-card .card-footer {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-surface-raised);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================================================
   7. Forms
   ============================================================================ */

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

label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

button[type="submit"] {
  padding: var(--space-sm) var(--space-xl);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-family);
  color: white;
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
}

button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

button[type="submit"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================================================
   8. Footer
   ============================================================================ */

.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0 var(--space-lg);
  margin-top: var(--space-3xl);
}

.footer-content {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ============================================================================
   9. Utility Classes
   ============================================================================ */

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

.text-muted {
  color: var(--color-text-muted);
}

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.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;
}

/* ============================================================================
   10. Animations
   ============================================================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.fade-in-up {
  animation: fadeInUp var(--transition-slow) ease-out;
}

.scale-in {
  animation: scaleIn var(--transition-slow) ease-out;
}

/* ============================================================================
   10. Contact Form Styles
   ============================================================================ */

.contact-form {
  max-width: 600px;
}

.form-field {
  margin-bottom: var(--space-lg);
}

.form-field label {
  display: block;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.form-field .required {
  color: var(--color-error);
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-field input.error,
.form-field select.error,
.form-field textarea.error {
  border-color: var(--color-error);
}

.form-field input[aria-invalid="true"],
.form-field select[aria-invalid="true"],
.form-field textarea[aria-invalid="true"] {
  border-color: var(--color-error);
  background-color: #fff5f5;
}

.form-field textarea {
  resize: vertical;
  min-height: 120px;
}

.error-message {
  display: block;
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
  min-height: 1.2em;
}

.character-count {
  display: block;
  text-align: right;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

.form-message {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.form-message.success {
  background-color: #d4edda;
  border: 2px solid var(--color-success);
  color: #155724;
}

.form-message.error {
  background-color: #f8d7da;
  border: 2px solid var(--color-error);
  color: #721c24;
}

.form-message strong {
  display: block;
  margin-bottom: var(--space-xs);
}

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

/* ============================================================================
   11. Print Styles
   ============================================================================ */

@media print {
  .site-header,
  .nav-toggle,
  .menu-overlay,
  .cta-group,
  .site-footer {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  a {
    color: black;
    text-decoration: underline;
  }
}