/* 
  PORTFOLIO STYLES
  Author: Tajelsir Khalid
  Updated for modern black-and-white aesthetic with blur effects
*/

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');

/* ===== VARIABLES ===== */
:root {
  /* Light Mode Colors (Black and White) */
  --primary-color: #000000;
  --primary-color-light: #333333;
  --secondary-color: #ffffff;
  --text-color: #000000;
  --text-color-light: #666666;
  --background-color: #ffffff;
  --background-alt: #f5f5f5;
  --border-color: #e0e0e0;
  --card-bg: rgba(255, 255, 255, 0.1);
  --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  --header-bg: rgba(255, 255, 255, 0.95);
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
  --hover-shadow: 0 10px 20px rgba(0, 0, 0, 0.25);
  --accent-color: #000000;
  --accent-color-light: rgba(0, 0, 0, 0.1);
  --success-color: #4caf50;
  --warning-color: #ff9800;
  --error-color: #f44336;
  --hover-bg: rgba(0, 0, 0, 0.05);
  
  /* Font Sizes */
  --heading-1: 2.5rem;
  --heading-2: 2rem;
  --heading-3: 1.5rem;
  --heading-4: 1.25rem;
  --paragraph: 1rem;
  --small-text: 0.875rem;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Border Radius */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 1rem;
  --border-radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Container Width */
  --container-width: 1200px;
  --container-padding: 1.5rem;
}

/* Dark Mode Colors */
[data-theme="dark"] {
  --primary-color: #ffffff;
  --primary-color-light: #cccccc;
  --secondary-color: #000000;
  --text-color: #ffffff;
  --text-color-light: #999999;
  --background-color: #000000;
  --background-alt: #1a1a1a;
  --border-color: #333333;
  --card-bg: rgba(0, 0, 0, 0.3);
  --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  --header-bg: rgba(0, 0, 0, 0.95);
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.4);
  --hover-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
  --accent-color: #ffffff;
  --accent-color-light: rgba(255, 255, 255, 0.1);
  --hover-bg: rgba(255, 255, 255, 0.05);
}

/* RTL Support for Arabic */
[data-lang="ar"] {
  direction: rtl;
  text-align: right;
}

[data-lang="ar"] .nav-list,
[data-lang="ar"] .footer-links {
  flex-direction: row-reverse;
}

[data-lang="ar"] .nav-link::after {
  left: unset;
  right: 0;
}

[data-lang="ar"] .hero-cta,
[data-lang="ar"] .project-links,
[data-lang="ar"] .social-links,
[data-lang="ar"] .footer-social {
  flex-direction: row-reverse;
}

[data-lang="ar"] .about-content,
[data-lang="ar"] .skills-content,
[data-lang="ar"] .contact-content {
  direction: rtl;
}

[data-lang="ar"] .info-item,
[data-lang="ar"] .contact-item {
  flex-direction: row-reverse;
}

[data-lang="ar"] .contact-icon {
  margin-right: 0;
  margin-left: var(--spacing-md);
}

/* ===== RESET AND BASE STYLES ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Poppins', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

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

ul {
  list-style: none;
}

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

button {
  cursor: pointer;
  font-family: inherit;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

section {
  padding: var(--spacing-xxl) 0;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-md);
  font-weight: 600;
  font-size: var(--paragraph);
  text-align: center;
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.btn-primary:hover {
  background: var(--primary-color-light);
  transform: translateY(-3px);
  box-shadow: var(--hover-shadow);
}

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

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-title {
  font-size: var(--heading-2);
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: var(--spacing-sm);
}

.section-underline {
  width: 80px;
  height: 4px;
  background: var(--primary-color);
  margin: 0 auto;
  border-radius: var(--border-radius-full);
}

/* ===== HEADER & NAVIGATION ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--header-bg);
  backdrop-filter: blur(15px);
  box-shadow: var(--box-shadow);
  z-index: 1000;
  transition: all var(--transition-normal);
  height: 70px;
  display: flex;
  align-items: center;
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.logo-icon {
  width: 35px;
  height: 35px;
}

.logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 0 2px rgba(0, 0, 0, 0.3));
  transition: transform var(--transition-fast);
}

.logo:hover .logo-img {
  transform: scale(1.1);
  filter: drop-shadow(0 0 4px rgba(0, 0, 0, 0.5));
}

.logo h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-color);
}

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

.nav-list {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--text-color);
  font-weight: 500;
  font-size: var(--paragraph);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--primary-color);
}

.theme-toggle,
.lang-toggle {
  margin-left: var(--spacing-md);
}

#theme-toggle-btn,
#lang-toggle-btn {
  background: var(--card-bg);
  border: none;
  font-size: 1rem;
  color: var(--text-color);
  padding: 0.5rem;
  border-radius: var(--border-radius-full);
  transition: background-color var(--transition-fast);
}

#theme-toggle-btn:hover,
#lang-toggle-btn:hover {
  background-color: var(--border-color);
}

#theme-toggle-btn .light-icon,
#lang-toggle-btn span[data-lang="ar"] {
  display: none;
}

[data-theme="dark"] #theme-toggle-btn .dark-icon {
  display: none;
}

[data-theme="dark"] #theme-toggle-btn .light-icon {
  display: inline;
}

[data-lang="ar"] #lang-toggle-btn span[data-lang="en"] {
  display: none;
}

[data-lang="ar"] #lang-toggle-btn span[data-lang="ar"] {
  display: inline;
}

.hamburger {
  display: none;
  cursor: pointer;
}

.bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  transition: all var(--transition-fast);
  background-color: var(--text-color);
}

/* ===== HERO SECTION ===== */
.hero {
  background: linear-gradient(45deg, rgba(0, 0, 0, 0.05), transparent);
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--spacing-xxl) * 2) 0;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  backdrop-filter: blur(5px);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
}

.hero-title {
  font-size: var(--heading-1);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

.hero-subtitle {
  font-size: var(--heading-3);
  font-weight: 600;
  color: var(--text-color-light);
  margin-bottom: var(--spacing-lg);
}

.hero-tagline {
  font-size: var(--heading-4);
  color: var(--text-color-light);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

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

/* ===== ABOUT SECTION ===== */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.about-text p {
  margin-bottom: var(--spacing-lg);
  color: var(--text-color-light);
}

.about-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

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

.info-label {
  font-weight: 600;
  color: var(--text-color);
  margin-right: var(--spacing-sm);
}

.info-value {
  color: var(--text-color-light);
}

.resume-btn {
  margin-top: var(--spacing-md);
}

.timeline-item {
  padding: var(--spacing-lg);
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--card-shadow);
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-fast);
}

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

.timeline-item h4 {
  font-size: var(--heading-4);
  font-weight: 600;
  color: var(--text-color);
}

.timeline-company {
  font-weight: 500;
  color: var(--primary-color);
}

.timeline-period {
  font-size: var(--small-text);
  color: var(--text-color-light);
  font-style: italic;
}

.timeline-description {
  color: var(--text-color-light);
}

.education .timeline-item {
  padding: var(--spacing-md);
}

/* ===== PROJECTS SECTION ===== */
.projects {
  background-color: var(--background-alt);
}

.project-filters {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.filter-btn {
  background: var(--card-bg);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-md);
  font-weight: 500;
  color: var(--text-color-light);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

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

.project-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.2);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-fast);
}

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

.project-img {
  height: 200px;
  overflow: hidden;
}

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

.project-card:hover .project-img img {
  transform: scale(1.05);
}

.project-info {
  padding: var(--spacing-lg);
}

.project-title {
  font-size: var(--heading-4);
  font-weight: 600;
  color: var(--text-color);
}

.project-description {
  color: var(--text-color-light);
  margin-bottom: var(--spacing-md);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.tech-tag {
  font-size: var(--small-text);
  background: var(--accent-color-light);
  color: var(--primary-color);
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius-sm);
}

.project-links {
  display: flex;
  gap: var(--spacing-md);
}

.project-link {
  font-size: var(--small-text);
  font-weight: 500;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* ===== SKILLS SECTION ===== */
.skills-content {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.skill-bars {
  margin-top: var(--spacing-md);
}

.skill-item {
  margin-bottom: var(--spacing-lg);
}

.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.skill-name {
  font-size: var(--paragraph);
  font-weight: 500;
}

.skill-percentage {
  font-size: var(--small-text);
  color: var(--text-color-light);
}

.skill-progress {
  height: 10px;
  background: var(--accent-color-light);
  border-radius: var(--border-radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--primary-color);
  border-radius: var(--border-radius-full);
  transition: width 1.5s ease;
}

.tools-grid,
.soft-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: var(--spacing-md);
}

.tool-item,
.soft-skill-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-md);
  background: var(--card-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--card-shadow);
  transition: all var(--transition-fast);
}

.tool-item:hover,
.soft-skill-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--hover-shadow);
}

.tool-item i,
.soft-skill-item i {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.tool-item span,
.soft-skill-item span {
  font-size: var(--small-text);
  font-weight: 500;
}

.soft-skills {
  grid-column: span 2;
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials {
  background-color: var(--background-alt);
}

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

.testimonial-slide {
  display: none;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.testimonial-slide.active {
  display: block;
  opacity: 1;
}

.testimonial-content {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-xl);
  box-shadow: var(--card-shadow);
}

.testimonial-quote {
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.testimonial-quote i {
  font-size: 1.5rem;
  color: var(--primary-color);
  opacity: 0.3;
  position: absolute;
  top: -10px;
  left: -10px;
}

[data-lang="ar"] .testimonial-quote i {
  left: unset;
  right: -10px;
}

.testimonial-quote p {
  color: var(--text-color);
}

.testimonial-author {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.author-details h4 {
  font-size: var(--paragraph);
  font-weight: 600;
  color: var(--text-color);
}

.author-details p {
  font-size: var(--small-text);
  color: var(--text-color-light);
}

.testimonial-rating {
  color: var(--warning-color);
  font-size: var(--small-text);
}

.testimonial-dots {
  text-align: center;
  margin-top: var(--spacing-lg);
}

.dot {
  width: 10px;
  height: 10px;
  margin: 0 5px;
  background-color: var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.dot:hover,
.dot.active {
  background-color: var(--primary-color);
}

/* ===== CONTACT SECTION ===== */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-xl);
}

.contact-item {
  display:tho flex;
  align-items: flex-start;
  margin-bottom: var(--spacing-lg);
}

.contact-icon {
  background: var(--accent-color-light);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--spacing-md);
  color: var(--primary-color);
  font-size: 1.25rem;
}

.contact-text h3 {
  font-size: var(--heading-4);
  font-weight: 600;
}

.contact-text p {
  color: var(--text-color-light);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.social-link {
  width: 45px;
  height: 45px;
  background: var(--card-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 1.25rem;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--primary-color);
  color: var(--secondary-color);
  transform: translateY(-5px);
}

.contact-form {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--card-shadow);
}

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--text-color);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  background: var(--card-bg);
  color: var(--text-color);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

.submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: var(--secondary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: 99;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--primary-color-light);
  transform: translateY(-5px);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--background-alt);
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.footer-logo h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-links a {
  color: var(--text-color);
  font-size: var(--small-text);
  font-weight: 500;
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
}

.footer-social a {
  color: var(--text-color);
  font-size: 1.25rem;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  font-size: var(--small-text);
  color: var(--text-color-light);
}

/* ===== RESPONSIVE STYLES ===== */
@media screen and (max-width: 992px) {
  :root {
    --heading-1: 2.2rem;
    --heading-2: 1.8rem;
    --heading-3: 1.3rem;
  }
  
  .about-content,
  .skills-content {
    grid-template-columns: 1fr;
  }
  
  .soft-skills {
    grid-column: span 1;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
  }
}

@media screen and (max-width: 768px) {
  .hamburger {
    display: block;
    z-index: 101;
  }
  
  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  
  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    background: var(--background-color);
    width: 70%;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    transition: right var(--transition-normal);
    z-index: 100;
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-list {
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-xl);
  }
  
  .nav-link {
    font-size: 1.2rem;
  }
  
  .info-item {
    grid-column: span 2;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .tools-grid,
  .soft-skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }
  
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media screen and (max-width: 576px) {
  :root {
    --heading-1: 2rem;
    --heading-2: 1.6rem;
    --heading-3: 1.2rem;
    --heading-4: 1.1rem;
  }
  
  .hero-cta {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .btn {
    width: 100%;
  }
  
  .contact-icon {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}