/* 
* Main Stylesheet for Ahmed Alsaleh's Resume Website
* Author: Manus AI
* Date: March 31, 2025
*/

/* ===== VARIABLES ===== */
:root {
    /* Colors */
    --primary: #1E3A8A;
    --secondary: #0D9488;
    --accent: #F59E0B;
    --bg-light: #F9FAFB;
    --bg-dark: #F3F4F6;
    --text-dark: #1F2937;
    --text-light: #F9FAFB;
    --text-muted: #6B7280;
    --border-color: #E5E7EB;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    --font-accent: 'Playfair Display', serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.5s ease;
    --transition-slow: 0.8s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    background: linear-gradient(to bottom, var(--bg-light), var(--bg-dark));
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

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

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

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

ul {
    list-style-position: inside;
    margin-bottom: var(--spacing-md);
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    position: relative;
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--primary);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--accent);
    border-radius: var(--radius-full);
}

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

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px var(--shadow-color);
    z-index: 1000;
    transition: all var(--transition-fast);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-md);
}

.logo a {
    font-family: var(--font-accent);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    transition: color var(--transition-fast);
}

.logo a:hover {
    color: var(--secondary);
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
}

.nav-menu li {
    margin-left: var(--spacing-lg);
}

.nav-menu a {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary);
    transition: width var(--transition-fast);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 30px;
    height: 3px;
    background-color: var(--primary);
    margin: 3px 0;
    transition: all var(--transition-fast);
}

/* ===== HERO SECTION ===== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-color: var(--primary);
    color: var(--text-light);
    overflow: hidden;
}

#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.name {
    font-size: 4.5rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 0.5s;
}

.title {
    font-family: var(--font-accent);
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 0.8s;
}

.contact-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 1.1s;
}

.contact-info span {
    display: flex;
    align-items: center;
    font-size: 1rem;
}

.contact-info i {
    margin-right: var(--spacing-sm);
    color: var(--accent);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: fadeIn 1s ease forwards 1.5s, bounce 2s infinite 2.5s;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--text-light);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.wheel {
    width: 4px;
    height: 10px;
    background-color: var(--text-light);
    border-radius: var(--radius-full);
    margin-top: 10px;
    animation: scroll 1.5s infinite;
}

.arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.arrow span {
    display: block;
    width: 10px;
    height: 10px;
    border-bottom: 2px solid var(--text-light);
    border-right: 2px solid var(--text-light);
    transform: rotate(45deg);
    margin: -5px 0;
}

/* ===== ABOUT SECTION ===== */
.about {
    background-color: var(--bg-light);
}

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

.summary h3, .competencies h3 {
    color: var(--secondary);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
}

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

.skill-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background-color: white;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.skill-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px var(--shadow-color);
}

.skill-item i {
    font-size: 1.5rem;
    color: var(--primary);
    margin-right: var(--spacing-md);
}

/* ===== EXPERIENCE SECTION ===== */
.experience {
    background-color: var(--bg-dark);
    position: relative;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background-color: var(--primary);
}

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

.timeline-dot {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background-color: var(--accent);
    border-radius: 50%;
    z-index: 1;
}

.timeline-date {
    position: absolute;
    top: 0;
    left: 0;
    width: 45%;
    text-align: right;
    padding-right: var(--spacing-lg);
}

.timeline-date span {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--primary);
    color: var(--text-light);
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.timeline-content {
    position: relative;
    width: 45%;
    margin-left: 55%;
    padding: var(--spacing-lg);
    background-color: white;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 6px var(--shadow-color);
}

.timeline-content h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.timeline-content h4 {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.timeline-content ul {
    list-style-type: none;
}

.timeline-content li {
    position: relative;
    padding-left: 20px;
    margin-bottom: var(--spacing-sm);
}

.timeline-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

.volunteer-title {
    margin-top: var(--spacing-xl);
}

.volunteer-timeline::before {
    background-color: var(--secondary);
}

/* ===== EDUCATION SECTION ===== */
.education {
    background-color: var(--bg-light);
}

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

.education-card {
    background-color: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: transform var(--transition-fast);
    text-align: center;
}

.education-card:hover {
    transform: translateY(-10px);
}

.education-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.education-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.education-card h4 {
    color: var(--secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.institution, .date {
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.honors {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.honor-badge {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--primary);
    color: var(--text-light);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
}

.certifications-section {
    margin-top: var(--spacing-xl);
}

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

.certification-item {
    background-color: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: 0 4px 6px var(--shadow-color);
    text-align: center;
    transition: transform var(--transition-fast);
}

.certification-item:hover {
    transform: translateY(-5px);
}

.certification-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: var(--spacing-md);
}

.certification-item h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.certification-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.achievements-section, .publications-section {
    margin-top: var(--spacing-xl);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.achievement-item {
    background-color: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: 0 4px 6px var(--shadow-color);
    text-align: center;
    transition: transform var(--transition-fast);
}

.achievement-item:hover {
    transform: translateY(-5px);
}

.achievement-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: var(--spacing-md);
}

.achievement-item h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.publication-item {
    background-color: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: 0 4px 6px var(--shadow-color);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.publication-item h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.publication-item h4 {
    color: var(--secondary);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

/* ===== SKILLS SECTION ===== */
.skills {
    background-color: var(--bg-dark);
}

.languages-section {
    margin-bottom: var(--spacing-xl);
}

.languages-section h3, .technical-skills h3 {
    text-align: center;
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    font-size: 1.8rem;
}

.language-bars {
    max-width: 600px;
    margin: 0 auto;
}

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

.language-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.language-name {
    font-weight: 600;
}

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

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

.progress-bar {
    height: 100%;
    background-color: var(--secondary);
    border-radius: var(--radius-full);
    width: 0;
    transition: width 1.5s ease;
}

.skills-cloud {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto;
}

.skill-tag {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: white;
    color: var(--primary);
    border-radius: var(--radius-full);
    font-weight: 600;
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    transform: scale(1.1);
    background-color: var(--primary);
    color: white;
}

/* ===== CONTACT SECTION ===== */
.contact {
    background-color: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

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

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary);
    margin-right: var(--spacing-md);
    margin-top: 5px;
}

.contact-item h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

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

.form-group input, .form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.form-group label {
    position: absolute;
    top: 0;
    left: var(--spacing-md);
    transform: translateY(-50%);
    background-color: var(--bg-light);
    padding: 0 var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    pointer-events: none;
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-group input:focus + label, .form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label, .form-group textarea:not(:placeholder-shown) + label {
    color: var(--primary);
    font-weight: 600;
}

.submit-btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--primary);
    color: var(--text-light);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.submit-btn:hover {
    background-color: var(--secondary);
    transform: translateY(-3px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--primary);
    color: var(--text-light);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--text-light);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background-color: var(--accent);
    color: var(--text-light);
    transform: translateY(-3px);
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-20px) translateX(-50%);
    }
    60% {
        transform: translateY(-10px) translateX(-50%);
    }
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(15px);
    }
}

/* ===== RESPONSIVE STYLES ===== */
@media screen and (max-width: 1024px) {
    html {
        font-size: 15px;
    }
    
    .achievements-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media screen and (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 10px var(--shadow-color);
        padding: var(--spacing-md) 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: var(--spacing-md) 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-dot {
        left: 30px;
    }
    
    .timeline-date {
        position: relative;
        width: 100%;
        left: 0;
        text-align: left;
        padding-left: 70px;
        padding-right: 0;
        margin-bottom: var(--spacing-md);
    }
    
    .timeline-content {
        width: calc(100% - 70px);
        margin-left: 70px;
    }
    
    .education-cards {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        margin-bottom: var(--spacing-xl);
    }
}

@media screen and (max-width: 480px) {
    .name {
        font-size: 3rem;
    }
    
    .title {
        font-size: 1.5rem;
    }
    
    .contact-info {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .achievements-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
}