/* ==========================
   CSS RESET & BASE STYLES
   ========================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: light only;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color-scheme: light only;
}

/* ==========================
   CSS CUSTOM PROPERTIES
   ========================== */

:root {
  /* Brand Colors */
  --color-rich-black: #090F21;
  --color-oxford-blue: #132437;
  --color-oxford-blue-2: #0A182E;
  --color-citron: #D7C173;
  --color-outer-space: #474949;

  /* Semantic Colors - Light Mode */
  --color-primary: var(--color-oxford-blue-2);
  --color-primary-light: var(--color-oxford-blue-2);
  --color-primary-dark: var(--color-rich-black);
  --color-accent: var(--color-citron);
  --color-accent-light: #E5D399;
  --color-accent-dark: #C9B556;
  
  --color-background: #FFFFFF;
  --color-surface: #F8F9FA;
  --color-surface-elevated: #FFFFFF;
  --color-text: var(--color-rich-black);
  --color-text-secondary: var(--color-outer-space);
  --color-text-muted: #6C757D;
  --color-text-inverse: #FFFFFF;
  
  --color-border: #E9ECEF;
  --color-border-focus: var(--color-accent);
  --color-error: #DC3545;
  --color-success: #28A745;
  --color-warning: #FFC107;
  --color-info: #17A2B8;

  /* Utility Tokens */
  --border-radius-sm: 0.25rem;
  --border-radius: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;

  --shadow-sm: 0 1px 2px rgba(9, 15, 33, 0.05);
  --shadow: 0 4px 6px rgba(9, 15, 33, 0.1);
  --shadow-lg: 0 10px 15px rgba(9, 15, 33, 0.1);
  --shadow-xl: 0 20px 25px rgba(9, 15, 33, 0.15);

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  --max-width-content: 1200px;
  --max-width-prose: 65ch;

  /* Typography Scale */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* ==========================
   LAYOUT UTILITIES
   ========================== */

.container {
  width: 100%;
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding-left: var(--spacing);
  padding-right: var(--spacing);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
}

/* ==========================
   TYPOGRAPHY
   ========================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

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-base); }

@media (min-width: 768px) {
  h1 { font-size: var(--font-size-5xl); }
  h2 { font-size: var(--font-size-4xl); }
  h3 { font-size: var(--font-size-3xl); }
}

p {
  margin-bottom: var(--spacing);
}

.section__title {
  text-align: center;
  margin-bottom: var(--spacing);
}

.section__subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: var(--max-width-prose);
  margin-left: auto;
  margin-right: auto;
}

/* ==========================
   BUTTONS
   ========================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  min-height: 44px; /* Accessibility - minimum touch target */
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
  border-color: var(--color-accent);
}

.btn--primary:hover,
.btn--primary:focus {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

.btn--secondary:hover,
.btn--secondary:focus {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline:hover,
.btn--outline:focus {
  background-color: white;
  color: var(--color-citron);
}

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

/* ==========================
   FORMS
   ========================== */

.input-group {
  margin-bottom: var(--spacing-lg);
}

.input-group__label {
  display: block;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.input-group__input,
.input-group__select,
.input-group__textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  background-color: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition);
  min-height: 44px; /* Accessibility */
}

.input-group__input:focus,
.input-group__select:focus,
.input-group__textarea:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(215, 193, 115, 0.1);
}

.input-group__textarea {
  resize: vertical;
  min-height: 120px;
}

.input-group__error {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
  display: none;
}

.input-group--error .input-group__input,
.input-group--error .input-group__select,
.input-group--error .input-group__textarea {
  border-color: var(--color-error);
}

.input-group--error .input-group__error {
  display: block;
}

/* ==========================
   HEADER & NAVIGATION
   ========================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-surface-elevated);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: all var(--transition);
}

/* Scrolled header styles with higher specificity */
.header.header--scrolled {
  background-color: rgba(255, 255, 255, 0.95) !important;
  box-shadow: var(--shadow);
  border-bottom: 1px solid rgba(233, 236, 239, 0.8);
}

.header.header--scrolled .nav__title,
.header.header--scrolled .nav__link {
  color: #090F21 !important;
}

.header.header--scrolled .nav__link:hover,
.header.header--scrolled .nav__link:focus {
  color: #FFFFFF !important;
  background-color: #090F21 !important;
}

.header.header--scrolled .nav__toggle-icon {
  background-color: #090F21 !important;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing);
  padding-bottom: var(--spacing);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav__logo {
  height: 40px;
  width: auto;
}

.nav__title {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  color: var(--color-text);
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition);
}

.nav__toggle:hover,
.nav__toggle:focus {
  background-color: var(--color-surface);
}

.nav__toggle-icon {
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition);
}

.nav__menu {
  position: fixed;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-surface-elevated);
  border-bottom: 1px solid var(--color-border);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.nav__menu--active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.nav__toggle--active .nav__toggle-icon:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle--active .nav__toggle-icon:nth-child(2) {
  opacity: 0;
}

.nav__toggle--active .nav__toggle-icon:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

.nav__list {
  list-style: none;
  padding: var(--spacing);
}

.nav__item {
  margin-bottom: var(--spacing-sm);
}

.nav__link {
  display: block;
  padding: var(--spacing-sm) var(--spacing);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: all var(--transition);
  font-weight: var(--font-weight-medium);
}

.nav__link:hover,
.nav__link:focus {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

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

  .nav__menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    background: none;
    border: none;
  }

  .nav__list {
    display: flex;
    gap: var(--spacing);
    padding: 0;
  }

  .nav__item {
    margin-bottom: 0;
  }
}

/* ==========================
   ABOUT SECTION
   ========================== */

.about {
  padding-top: 2rem;
  padding-bottom: 2rem;
  background-color: var(--color-surface);
}

.about__content {
  max-width: var(--max-width-prose);
  margin: 0 auto;
}

.about__intro {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.about__mission,
.about__vision,
.about__philosophy {
  margin-bottom: var(--spacing-2xl);
}

.about__section-title {
  color: var(--color-accent-dark);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: var(--spacing-xs);
  display: inline-block;
}

.about__mission p,
.about__vision p,
.about__philosophy p {
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing);
}

/* ==========================
   HERO SECTION
   ========================== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  background-image: url('images/gallery/1000007271.jpg');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
  position: relative;
  padding-top: 80px; /* Account for fixed header */
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(9, 15, 33, 0.8) 0%, rgba(19, 36, 55, 0.6) 100%);
}

.hero__container {
  position: relative;
  z-index: 1;
}

.hero__content {
  text-align: center;
  color: var(--color-text-inverse);
  max-width: 800px;
  margin: 0 auto;
}

.hero__title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .hero__title {
    font-size: var(--font-size-5xl);
  }
  
  .hero__subtitle {
    font-size: var(--font-size-xl);
  }
}

/* ==========================
   CALCULATOR SECTION
   ========================== */

.calculator {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-surface);
}

.calculator__container {
  max-width: 1000px;
  margin: 0 auto;
}

.calculator__details,
.calculator__grid,
.calculator__totals {
  background-color: var(--color-surface-elevated);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow);
}

.calculator__section-title {
  margin-bottom: var(--spacing-lg);
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: var(--spacing-sm);
}

.calculator__row {
  display: grid;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

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

/* Grid Styles */
.grid-container {
  overflow-x: auto;
  margin-bottom: var(--spacing-lg);
}

.grid-header {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr 1fr auto;
  gap: var(--spacing-sm);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  font-weight: var(--font-weight-semibold);
  min-width: 700px;
}

.grid-body {
  min-width: 700px;
}

.grid-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr 1fr auto;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
  align-items: center;
}

.grid-row:nth-child(even) {
  background-color: var(--color-surface);
}

.grid-cell {
  padding: var(--spacing-xs);
  font-size: var(--font-size-sm);
}

.grid-input {
  width: 100%;
  padding: var(--spacing-xs);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  background-color: var(--color-surface);
  color: var(--color-text);
  min-height: 36px;
}

.grid-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 2px rgba(215, 193, 115, 0.2);
}

.grid-input.auto-calc {
  background-color: rgba(215, 193, 115, 0.1);
  font-style: italic;
}

.grid-select {
  width: 100%;
  padding: var(--spacing-xs);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  background-color: var(--color-surface);
  color: var(--color-text);
  min-height: 36px;
}

.grid-select:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 2px rgba(215, 193, 115, 0.2);
}

.grid-select option {
  background-color: var(--color-surface);
  color: var(--color-text);
  padding: var(--spacing-xs);
}

.remove-btn {
  background-color: var(--color-error);
  color: white;
  border: none;
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: background-color var(--transition);
}

.remove-btn:hover {
  background-color: #c82333;
}

.calculator__disclaimer {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing);
  background-color: rgba(255, 193, 7, 0.1);
  border: 1px solid rgba(255, 193, 7, 0.3);
  border-radius: var(--border-radius);
  border-left: 4px solid #ffc107;
}

.disclaimer-text {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: 1.5;
}

.disclaimer-text strong {
  color: #e67e22;
  font-weight: var(--font-weight-semibold);
}

.calculator__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing);
  justify-content: center;
}

/* Pricing Summary */
.pricing-summary-container {
  margin-bottom: var(--spacing-lg);
}

.pricing-summary {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.summary-row:last-child {
  border-bottom: none;
}

.summary-row--base {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-accent);
  padding: var(--spacing) 0;
}

.summary-label {
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.summary-value {
  font-weight: var(--font-weight-semibold);
  font-family: 'Courier New', monospace;
  color: var(--color-text);
}

.summary-message {
  text-align: center;
  color: var(--color-text-muted);
  font-style: italic;
  padding: var(--spacing-xl);
}

/* Totals Grid */
.totals-grid {
  display: grid;
  gap: var(--spacing);
}

.total-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.total-item--grand {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  border-bottom: 3px solid var(--color-accent);
  padding: var(--spacing) 0;
}

.total-label {
  font-weight: var(--font-weight-medium);
}

.total-value {
  font-weight: var(--font-weight-semibold);
  font-family: 'Courier New', monospace;
}

/* ==========================
   SYSTEMS SECTION
   ========================== */

.systems {
  padding: var(--spacing-3xl) 0;
}

.systems__grid {
  display: grid;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

@media (min-width: 768px) {
  .systems__grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

.system-card {
  background-color: var(--color-surface-elevated);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.system-card__image {
  height: 200px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-dark);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
}

.system-card__badge {
  position: absolute;
  top: var(--spacing);
  right: var(--spacing);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
}

.system-card__content {
  padding: var(--spacing-xl);
}

.system-card__title {
  margin-bottom: var(--spacing);
  color: white;
}

.system-card__description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

.system-card__features {
  list-style: none;
}

.system-card__features li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

.system-card__features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: var(--font-weight-bold);
}

/* ==========================
   FAQ SECTION
   ========================== */

.faq {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-surface);
}

.faq__container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--color-surface-elevated);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--spacing);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-item__question {
  width: 100%;
  padding: var(--spacing-lg);
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color var(--transition);
}

.faq-item__question:hover {
  background-color: var(--color-surface);
}

.faq-item__icon::after {
  content: '+';
  font-size: var(--font-size-xl);
  color: var(--color-accent);
  transition: transform var(--transition);
}

.faq-item__question[aria-expanded="true"] .faq-item__icon::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}

.faq-item__answer--active {
  max-height: 500px;
}

.faq-item__answer p {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ==========================
   CONTACT SECTION
   ========================== */

.contact {
  padding: var(--spacing-3xl) 0;
  margin:auto;
}

.contact__container {
  gap: var(--spacing-2xl);
  max-width: 1000px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .contact__container {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.contact__info {
  background-color: var(--color-surface-elevated);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
}

.contact__info-title {
  margin-bottom: var(--spacing-lg);
  color: var(--color-primary);
}

.contact__item {
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.contact__link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
}

.contact__link:hover {
  text-decoration: underline;
}

.contact__phones {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

@media (min-width: 768px) {
  .contact__phones {
    flex-direction: row;
    gap: var(--spacing);
  }
}

.contact__social {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.contact__social-title {
  color: white;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing);
}

.social__links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing);
}

.social__link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  text-decoration: none;
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  transition: all var(--transition);
}

.social__link:hover {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  text-decoration: none;
}

.social__icon {
  font-size: var(--font-size-lg);
}

.contact__form {
  background-color: var(--color-surface-elevated);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
}

.contact__form-status {
  padding: var(--spacing);
  border-radius: var(--border-radius);
  margin-top: var(--spacing);
  text-align: center;
  font-weight: var(--font-weight-medium);
  display: none;
}

.contact__form-status--success {
  background-color: rgba(40, 167, 69, 0.1);
  color: var(--color-success);
  border: 1px solid var(--color-success);
  display: block;
}

.contact__form-status--error {
  background-color: rgba(220, 53, 69, 0.1);
  color: var(--color-error);
  border: 1px solid var(--color-error);
  display: block;
}

/* ==========================
   FOOTER
   ========================== */

.footer {
  background-color: var(--color-primary-dark);
  color: var(--color-text-inverse);
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.footer__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing);
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}
/* change */
.footer__logo {
    height: 32px;
    width: auto;
}

.footer__title {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
}

.footer__copyright {
  opacity: 0.8;
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* ==========================
   ACCESSIBILITY
   ========================== */

/* Focus styles */
*:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

button:focus,
input:focus,
select:focus,
textarea:focus,
a:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Skip link for screen readers */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: 8px;
  text-decoration: none;
  border-radius: var(--border-radius);
  z-index: 1001;
}

.skip-link:focus {
  top: 6px;
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
    --color-text: #000000;
    --color-background: #FFFFFF;
  }
}

/* ==========================
   UTILITY CLASSES
   ========================== */

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

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

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

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

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

/* ==========================
   PORTFOLIO PAGE STYLES
   ========================== */

/* Portfolio Hero Section */
.portfolio-hero {
  padding-top: calc(80px + var(--spacing-3xl));
  padding-bottom: var(--spacing-3xl);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-inverse);
  text-align: center;
}

.portfolio-hero__content {
  max-width: 800px;
  margin: 0 auto;
}

.portfolio-hero__title {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing);
  font-weight: var(--font-weight-bold);
}

.portfolio-hero__subtitle {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  margin-bottom: 0;
}

@media (min-width: 768px) {
  .portfolio-hero__title {
    font-size: var(--font-size-5xl);
  }
  
  .portfolio-hero__subtitle {
    font-size: var(--font-size-xl);
  }
}

/* Portfolio Filters */
.portfolio-filters {
  padding: var(--spacing-2xl) 0;
  background-color: var(--color-surface);
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-sm);
}

.filter-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-surface-elevated);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover,
.filter-btn--active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary-dark);
}

/* Portfolio Gallery */
.portfolio-gallery {
  padding: var(--spacing-3xl) 0;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

@media (min-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  }
}

.gallery-item {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  opacity: 1;
  transform: scale(1);
}

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

.gallery-item.hidden {
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
}

.gallery-item__image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.gallery-item__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.gallery-item:hover .gallery-item__image img {
  transform: scale(1.05);
}

.gallery-item__overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(9, 15, 33, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery-item:hover .gallery-item__overlay {
  opacity: 1;
}

.gallery-view-btn {
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-primary-dark);
  border: none;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: var(--shadow);
}

.gallery-view-btn:hover {
  background: white;
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.gallery-view-btn svg {
  width: 28px;
  height: 28px;
}

/* Palette Explorer */
.palette-explorer {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-background);
}

.palette-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin: var(--spacing-xl) 0;
}

.palette-filter {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 2px solid var(--color-border);
  background-color: transparent;
  color: var(--color-text);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition);
  font-weight: var(--font-weight-medium);
}

.palette-filter:hover,
.palette-filter--active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(px, 1fr));
  grid-auto-rows: 500px; /* adjust height */
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

@media (min-width: 768px) {
  .palette-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }
}

.palette-card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  opacity: 1;
  transform: scale(1);
}

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

.palette-card.hidden {
  opacity: 0;
  transform: scale(0.9);
  pointer-events: none;
}

.palette-card__header {
  padding: var(--spacing-lg);
  text-align: center;
}

.palette-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.palette-card__type {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: var(--font-weight-medium);
}

.palette-card__images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.palette-card__image {
  position: relative;
  cursor: pointer;
}

.palette-card__image img {
  width: 100%;
  height: 100%;
  transition: transform var(--transition);
}

.palette-card__image:hover img {
  transform: scale(1.05);
}

.palette-card__image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}

.palette-card__image:hover .palette-card__image-overlay {
  opacity: 1;
}

.palette-view-btn {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
}

.palette-view-btn:hover {
  background-color: var(--color-accent-light);
  transform: scale(1.1);
}

.palette-view-btn svg {
  width: 24px;
  height: 24px;
}

.palette-cta {
  text-align: center;
  margin-top: var(--spacing-3xl);
  padding: var(--spacing-2xl);
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
}

.palette-cta h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.palette-cta p {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* Gallery Preview (Home Page) */
.gallery-preview {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-surface);
}

.gallery-preview__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

@media (min-width: 768px) {
  .gallery-preview__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
  }
}

.gallery-preview__grid .gallery-item {
  margin: 0;
}

.gallery-preview__grid .gallery-item__image img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

@media (min-width: 768px) {
  .gallery-preview__grid .gallery-item__image img {
    height: 250px;
  }
}

.gallery-preview__cta {
  text-align: center;
  margin-top: var(--spacing-2xl);
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 767px) {
  .gallery-preview__cta {
    flex-direction: column;
    align-items: center;
  }
  
  .gallery-preview__cta .btn {
    width: 100%;
    max-width: 280px;
  }
}

/* Calculator Hero */
.calculator-hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: var(--color-text-inverse);
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.calculator-hero__title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.calculator-hero__subtitle {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.5;
}

@media (min-width: 768px) {
  .calculator-hero__title {
    font-size: var(--font-size-4xl);
  }
  
  .calculator-hero__subtitle {
    font-size: var(--font-size-xl);
  }
}

/* Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}

.lightbox.active {
  display: flex;
}

.lightbox__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  cursor: pointer;
}

.lightbox__container {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  background-color: var(--color-surface-elevated);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.lightbox__close {
  position: absolute;
  top: var(--spacing);
  right: var(--spacing);
  background: rgba(0, 0, 0, 0.5);
  color: white;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: var(--font-size-xl);
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition);
}

.lightbox__close:hover {
  background: rgba(0, 0, 0, 0.7);
}

.lightbox__prev,
.lightbox__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.5);
  color: white;
  border: none;
  width: 50px;
  height: 50px;
  font-size: var(--font-size-2xl);
  cursor: pointer;
  transition: background-color var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__prev {
  left: var(--spacing);
  border-radius: 0 50% 50% 0;
}

.lightbox__next {
  right: var(--spacing);
  border-radius: 50% 0 0 50%;
}

.lightbox__prev:hover,
.lightbox__next:hover {
  background: rgba(0, 0, 0, 0.7);
}

.lightbox__content {
  display: flex;
  flex-direction: column;
  max-height: 90vh;
}

.lightbox__image {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
}

.lightbox__info {
  padding: var(--spacing-lg);
  background-color: var(--color-surface-elevated);
}

.lightbox__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.lightbox__description {
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* Active navigation link */
.nav__link--active {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

/* CTA Section on Portfolio Page */
.cta-section {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  text-align: center;
}

.cta-content h2 {
  font-size: var(--font-size-3xl);
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing);
}

.cta-content p {
  font-size: var(--font-size-lg);
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing);
  justify-content: center;
}

@media (max-width: 767px) {
  .cta-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-actions .btn {
    width: 100%;
    max-width: 280px;
  }
}