/**
 * Main Stylesheet for Morteza Asadi's Portfolio
 * Author: Morteza Asadi
 * Version: 1.0
 */

/* ==========================================================================
   1. CSS Variables & Base Settings
   ========================================================================== */

:root {
  /* Primary Colors */
  --color-primary: #4f46e5; /* Indigo */
  --color-primary-light: #818cf8; /* Light Indigo */
  --color-primary-dark: #3730a3; /* Dark Indigo */

  /* Secondary Colors */
  --color-secondary: #10b981; /* Emerald */
  --color-secondary-light: #34d399; /* Light Emerald */
  --color-secondary-dark: #059669; /* Dark Emerald */

  /* Neutral Colors */
  --color-bg-light: #f9fafb; /* Light Gray Background */
  --color-white: #ffffff; /* White */
  --color-dark: #111827; /* Almost Black */
  --color-text: #374151; /* Dark Gray for Text */
  --color-text-muted: #6b7280; /* Medium Gray for Secondary Text */

  /* Accent Colors */
  --color-accent-1: #f43f5e; /* Rose */
  --color-accent-2: #7c3aed; /* Violet */
  --color-accent-3: #0ea5e9; /* Sky Blue */

  /* UI Colors */
  --color-error: #ef4444; /* Red */
  --color-success: #10b981; /* Emerald (same as secondary) */
  --color-warning: #f59e0b; /* Amber */
  --color-info: #3b82f6; /* Blue */

  /* Dark Mode Colors (will be set via JavaScript) */
  --color-bg-dark: #111827; /* Dark Background */
  --color-surface-dark: #1f2937; /* Darker Surface */
  --color-text-dark: #f9fafb; /* Light Text for Dark Mode */

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

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Typography */
  --font-sans: "Inter", sans-serif;
  --font-heading: "Poppins", sans-serif;
  --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;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg-light);
  overflow-x: hidden;
  /* Improve mobile performance */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

/* Optimize image loading */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Will-change for animations */
.profile-photo,
[data-aos] {
  will-change: transform, opacity;
}

/* After animation completes, remove will-change */
[data-aos].aos-animate {
  will-change: auto;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg-light);
  line-height: 1.5;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--color-dark);
  font-weight: 600;
  line-height: 1.2;
}

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

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

ul {
  list-style-position: inside;
}

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

button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* Helper 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-width: 0;
}

/* ==========================================================================
     2. Layout & Sections
     ========================================================================== */

/* Common Section Styles */
.section {
  padding: var(--spacing-3xl) 0;
  min-height: 100vh; /* Ensure sections are tall enough for proper scrolling */
  display: flex;
  align-items: center;
}

.section--alt {
  background-color: var(--color-white);
}

.section-container {
  max-width: 64rem; /* 1024px */
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-2xl);
  text-align: center;
  position: relative;
}

/* Header / Home Section */
.profile-photo {
  width: 20rem;
  height: 20rem;
  border-radius: var(--radius-full);
  object-fit: contain;
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm);
  background-color: var(--color-white);
}

.welcome-text {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-xs);
}

.bio-text {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  max-width: 36rem;
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.download-btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  margin-top: var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: background-color var(--transition-fast);
}

.download-btn:hover,
.download-btn:focus {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

/* Footer */
.site-footer {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: var(--spacing-lg) 0;
  text-align: center;
}

.footer-content {
  max-width: 64rem;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.copyright {
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

/* ==========================================================================
     3. Name Animation
     ========================================================================== */

.name-group {
  display: inline-block;
  white-space: nowrap;
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-md);
}

.name-part {
  display: inline-block;
  vertical-align: middle;
  animation-delay: 3s !important;
  animation-duration: 10s !important;
  animation-iteration-count: infinite !important;
}

.name-part--first {
  animation: changeColorPart1;
}

.name-part--middle {
  animation: disappearPart2;
  overflow: hidden;
  max-width: 280px;
}

.name-part--last {
  animation: changeColorPart3;
}

@keyframes changeColorPart1 {
  0% {
    color: var(--color-dark);
  }
  20% {
    color: var(--color-primary);
  }
  40% {
    color: var(--color-primary);
  }
  50% {
    color: var(--color-primary);
  }
  80% {
    color: var(--color-primary);
  }
  100% {
    color: var(--color-dark);
  }
}

@keyframes disappearPart2 {
  0% {
    opacity: 1;
    max-width: 280px;
  }
  20% {
    opacity: 1;
    max-width: 280px;
    color: #a8a8a8;
  }
  40% {
    opacity: 1;
    color: var(--color-bg-light);
  }
  50% {
    opacity: 0;
    max-width: 0;
    color: var(--color-bg-light);
  }
  80% {
    opacity: 1;
    max-width: 280px;
    color: #a8a8a8;
  }
  100% {
    opacity: 1;
    max-width: 280px;
  }
}

@keyframes changeColorPart3 {
  0% {
    color: var(--color-dark);
  }
  20% {
    color: var(--color-primary);
  }
  40% {
    color: var(--color-primary);
  }
  50% {
    color: var(--color-primary);
  }
  80% {
    color: var(--color-primary);
  }
  100% {
    color: var(--color-dark);
  }
}

/* ==========================================================================
     4. Social Links
     ========================================================================== */

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.social-links a {
  color: var(--color-text-muted);
  font-size: 1.5rem;
  transition: all var(--transition-normal);
}

.social-links a:hover,
.social-links a:focus {
  color: var(--color-primary);
  transform: translateY(-3px);
}

/* ==========================================================================
     5. Experience Timeline
     ========================================================================== */

.timeline {
  position: relative;
  margin-top: var(--spacing-xl);
}

.timeline-item {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

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

.timeline-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  gap: var(--spacing-md);
  text-align: left;
}

.job-meta {
  display: flex;
  flex-direction: column;
}

.expand-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  color: var(--color-primary-light);
  font-weight: 500;
  margin-top: 0.3rem;
  transition: color 0.2s ease;
}

.timeline-header[aria-expanded="true"] .expand-hint i {
  transform: rotate(180deg);
}

.expand-hint i {
  transition: transform 0.3s ease;
}

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

.company-logo {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.company-name {
  font-size: var(--font-size-lg);
  margin-bottom: 0;
}

.job-title {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.job-period {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  white-space: nowrap;
}

.timeline-details {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transform-origin: top;
  transform: scaleY(0.98);
  transition: max-height var(--transition-normal),
    opacity var(--transition-normal), transform var(--transition-normal);
}

.timeline-details.open {
  max-height: 1000px;
  opacity: 1;
  transform: scaleY(1);
}

.timeline-details-inner {
  padding: 0 var(--spacing-md) 0;
  transition: padding 0.3s ease;
  margin-left: var(--spacing-xl);
}

.timeline-details.open .timeline-details-inner {
  padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md);
}

.timeline-details-inner-header {
  font-weight: 600;
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.job-key-achievements {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding-left: 0;
  margin: 0;
  margin-left: var(--spacing-sm);
}

.job-key-achievements li {
  background-color: var(--primary-light, #e0e7ff);
  color: var(--primary-dark, #3730a3);
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  transition: background 0.3s;
  white-space: nowrap;
}

.job-key-achievements li:hover {
  cursor: pointer;
  background-color: var(--primary-dark, #3730a3);
  color: var(--white, #ffffff);
}

.job-responsibilities {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding-left: 0;
  margin: 0;
  margin-left: var(--spacing-sm);
}

.job-responsibilities li {
  margin-bottom: var(--spacing-xs);
}

.job-tech-stack {
  margin-top: var(--spacing-sm);
  font-size: 0.875rem;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  margin-left: var(--spacing-sm);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.tag-list li {
  background-color: var(--primary-light, #e0e7ff);
  color: var(--primary-dark, #3730a3);
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  transition: background 0.3s;
  white-space: nowrap;
}

.tag-list li:hover {
  cursor: pointer;
  background-color: var(--primary-dark, #3730a3);
  color: var(--white, #ffffff);
}

/* ==========================================================================
     6. Education Section
     ========================================================================== */

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

.education-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

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

.education-logo {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.degree-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
}

.institution {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ==========================================================================
     7. Certificates Section
     ========================================================================== */

.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.certificate-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

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

.certificate-logo {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.certificate-title {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-xs);
}

.certificate-issuer {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ==========================================================================
     8. Projects Section
     ========================================================================== */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.project-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

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

.project-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

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

.project-link {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 600;
  transition: color var(--transition-fast);
}

.project-link:hover,
.project-link:focus {
  color: var(--color-primary-dark);
}

.project-btn i {
  margin-right: 0.3rem;
  font-size: 1rem;
}

/* ==========================================================================
     9. Mac-style Dock Navigation
     ========================================================================== */

.dock {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  position: fixed;
  bottom: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--spacing-lg);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  z-index: 50;
  border: 1px solid rgba(99, 102, 241, 0.36);
}

.dock__item {
  position: relative;
  transition: transform var(--transition-normal);
  transform-origin: bottom;
}

.dock__link {
  font-size: 2.2rem;
  display: block;
}

.dock__label {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translate(-50%, 0) translateY(8px);
  opacity: 0;
  white-space: nowrap;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: var(--font-size-xs);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  pointer-events: none;
  transition: all var(--transition-fast);
}

.dock__item:hover {
  transform: scale(1.3) translateY(-6px);
}

.dock__item:hover .dock__label {
  opacity: 1;
  transform: translate(-50%, 0) translateY(0);
}

.dock__item.active::after {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
}

/* ==========================================================================
     10. Media Queries
     ========================================================================== */

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) {
  .section-title {
    font-size: var(--font-size-4xl);
  }

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

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  .timeline-header {
    padding: var(--spacing-lg);
  }

  .company-logo {
    width: 3.5rem;
    height: 3.5rem;
  }

  .education-grid {
    gap: var(--spacing-lg);
  }

  .education-card {
    padding: var(--spacing-lg);
  }

  .certificate-card {
    padding: var(--spacing-lg);
  }

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

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
  .name-group {
    font-size: 3.5rem;
  }

  .welcome-text {
    font-size: 2.5rem;
  }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
  .section-container {
    max-width: 75rem; /* 1200px */
  }
}

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

@media print {
  .dock {
    display: none;
  }

  body {
    background-color: white;
  }

  .timeline-details {
    max-height: none;
    opacity: 1;
    padding: 0 var(--spacing-md) var(--spacing-md);
  }

  .section {
    padding: var(--spacing-lg) 0;
    page-break-inside: avoid;
  }

  a {
    text-decoration: underline;
  }

  .download-btn {
    display: none;
  }
}