/* ===== VARIABLES ===== */
:root {
  /* Colors - Teal theme inspired by logo */
  --color-primary: #4fd1c7;        /* Teal from logo */
  --color-primary-dark: #319795;   /* Darker teal */
  --color-primary-light: #9ae6b4;  /* Light teal/green */
  --color-accent: #38b2ac;         /* Accent teal */
  
  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f7fafc;
  --color-gray-100: #edf2f7;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e0;
  --color-gray-500: #718096;
  --color-gray-700: #2d3748;
  --color-gray-800: #1a202c;
  --color-gray-900: #171923;
  
  /* Text Colors */
  --color-text-primary: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-700);
  --color-text-muted: var(--color-gray-500);
  --color-text-inverse: var(--color-white);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  
  /* Spacing */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */
  --spacing-3xl: 4rem;     /* 64px */
  --spacing-4xl: 6rem;     /* 96px */
  
  /* Borders & Shadows */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Layout */
  --container-max-width: 1200px;
  --section-padding: var(--spacing-4xl);
  --header-height: 80px;
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-base: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-base);
}

ul {
  list-style: none;
}

input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
}

/* ===== UTILITY CLASSES ===== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--section-padding) 0;
}

.section:nth-child(even) {
  background-color: var(--color-gray-50);
}

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

.centered {
  text-align: center;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  min-height: 48px;
  gap: var(--spacing-sm);
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

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

/* ===== HEADER & NAVIGATION ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-gray-200);
  z-index: 1000;
  height: var(--header-height);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--spacing-md);
}

.nav__brand {
  flex-shrink: 0;
}

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

.nav__menu {
  display: flex;
  align-items: center;
}

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

.nav__link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-base);
  padding: var(--spacing-sm) 0;
  position: relative;
}

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

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

.nav__link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

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

.language-switcher {
  display: flex;
  gap: var(--spacing-xs);
}

.lang-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--color-gray-300);
  background-color: var(--color-white);
  color: var(--color-text-secondary);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-base);
}

.lang-btn:hover,
.lang-btn.active {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  width: 30px;
  height: 30px;
  cursor: pointer;
}

.nav__toggle-icon {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--color-text-primary);
  position: relative;
  transition: all var(--transition-base);
}

.nav__toggle-icon::before,
.nav__toggle-icon::after {
  content: '';
  position: absolute;
  width: 25px;
  height: 3px;
  background-color: var(--color-text-primary);
  transition: all var(--transition-base);
}

.nav__toggle-icon::before {
  top: -8px;
}

.nav__toggle-icon::after {
  top: 8px;
}

/* ===== MAIN CONTENT ===== */
.main {
  padding-top: var(--header-height);
}

/* ===== HERO SECTION ===== */
.hero {
  padding: var(--spacing-4xl) 0;
  background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
  min-height: 70vh;
  display: flex;
  align-items: center;
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero__content {
  z-index: 2;
}

.hero__title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.hero__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 540px;
}

.hero__buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero__image {
  position: relative;
}

.hero__img {
  width: 100%;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
}

/* ===== SECTION LAYOUTS ===== */
.section__header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section__title {
  margin-bottom: var(--spacing-md);
}

.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
}

.section__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.section__content.reverse {
  direction: rtl;
}

.section__content.reverse > * {
  direction: ltr;
}

.section__image {
  position: relative;
}

.section__img {
  width: 100%;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-lg);
}

.section__text {
  max-width: 540px;
}

.section__description {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xl);
}

.section__features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

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

.feature-icon {
  font-size: var(--font-size-2xl);
  flex-shrink: 0;
}

/* ===== PROJECT CARDS ===== */
.project-card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  transition: all var(--transition-base);
}

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

.project-card.reverse .project__content {
  direction: rtl;
}

.project-card.reverse .project__content > * {
  direction: ltr;
}

.project__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

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

.project__specs {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.spec-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

.spec-item:last-child {
  border-bottom: none;
}

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

.spec-value {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  font-size: var(--font-size-lg);
}

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

.partner__img {
  height: 32px;
  width: auto;
}

.partner-name {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.project__img {
  width: 100%;
  border-radius: var(--border-radius-lg);
}

/* ===== BLOG SECTION ===== */
.blog__container {
  max-width: 900px;
  margin: 0 auto;
}

.blog__loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-2xl);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-gray-200);
  border-left-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.blog__posts {
  display: grid;
  gap: var(--spacing-xl);
}

.blog-post {
  background-color: var(--color-white);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-2xl);
  transition: all var(--transition-base);
}

.blog-post:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.blog-post__date {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.blog-post__title {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.blog-post__content {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.blog__empty {
  text-align: center;
  padding: var(--spacing-3xl);
  color: var(--color-text-muted);
}

/* ===== CONTACT SECTION ===== */
.contact__container {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-3xl);
  max-width: 1000px;
  margin: 0 auto;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.contact__item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
}

.contact__icon {
  font-size: var(--font-size-2xl);
  flex-shrink: 0;
}

.contact__details h4 {
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
}

.contact__link {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

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

/* ===== FORMS ===== */
.contact__form {
  background-color: var(--color-white);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
}

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
  background-color: var(--color-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 209, 199, 0.1);
}

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

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

.form-status.success {
  background-color: #f0fff4;
  color: #22543d;
  border: 1px solid #9ae6b4;
  display: block;
}

.form-status.error {
  background-color: #fff5f5;
  color: #742a2a;
  border: 1px solid #feb2b2;
  display: block;
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--spacing-3xl) 0 var(--spacing-xl) 0;
}

.footer__content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-2xl);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  height: 40px;
  width: auto;
  margin-bottom: var(--spacing-md);
  filter: brightness(0) invert(1);
}

.footer__description {
  color: var(--color-gray-300);
  margin-bottom: 0;
}

.footer__links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-2xl);
}

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

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__list a {
  color: var(--color-gray-300);
  transition: color var(--transition-base);
}

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

.footer__bottom {
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-gray-700);
}

.footer__copyright {
  text-align: center;
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}