/* ===========================================
   CSS Variables & Reset
   =========================================== */
:root {
    --primary: #1a1a2e;
    --primary-light: #16213e;
    --secondary: #fff;
    --accent: #d4a373;
    --accent-dark: #b8956a;
    --gray-light: #f5f5f5;
    --gray-medium: #e5e5e5;
    --gray-dark: #333;
    --text-light: #eee;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
    --transition: 0.3s ease;
    --max-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --nav-height: 70px;
    --nav-height-desktop: 80px;
}

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

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

body {
    font-family: 'Nunito Sans', sans-serif;
    line-height: 1.6;
    color: var(--gray-dark);
}

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

a:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ===========================================
   Navigation
   =========================================== */
.nav-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    height: var(--nav-height);
    width: 100%;
    padding: 0 var(--spacing-sm);
    position: relative;
    box-shadow: var(--shadow-md);
}

.nav-logo {
    color: var(--secondary);
    font-size: 1.25rem;
    font-weight: 600;
    z-index: 100;
}

.nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--primary) 100%);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    box-shadow: var(--shadow-md);
    z-index: 99;
}

.nav-bar-element {
    display: block;
    font-size: 1rem;
    color: var(--secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: color var(--transition), background-color var(--transition);
    position: relative;
}

.nav-bar-element::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--spacing-md);
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width var(--transition);
}

.nav-bar-element:hover,
.nav-bar-element:focus {
    color: var(--accent);
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-bar-element:hover::after,
.nav-bar-element:focus::after {
    width: calc(100% - var(--spacing-md) * 2);
}

/* Hamburger Menu */
.nav-toggle {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.nav-toggle-label {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    cursor: pointer;
    z-index: 100;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--secondary);
    border-radius: 2px;
    transition: all var(--transition);
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
    content: '';
    position: absolute;
}

.nav-toggle-label span::before {
    transform: translateY(-8px);
}

.nav-toggle-label span::after {
    transform: translateY(8px);
}

.nav-toggle-label span {
    position: relative;
}

/* Hamburger Animation */
.nav-toggle:checked ~ .nav-toggle-label span {
    background-color: transparent;
}

.nav-toggle:checked ~ .nav-toggle-label span::before {
    transform: rotate(45deg);
}

.nav-toggle:checked ~ .nav-toggle-label span::after {
    transform: rotate(-45deg);
}

.nav-toggle:checked ~ .nav-links {
    max-height: 400px;
}

/* ===========================================
   Hero Banner
   =========================================== */
.home-page-banner {
    height: calc(100vh - var(--nav-height));
    min-height: 400px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    position: relative;
    overflow: hidden;
}

.home-page-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(212, 163, 115, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(212, 163, 115, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.03) 0%, transparent 30%);
    pointer-events: none;
}

.home-banner-text {
    padding: var(--spacing-md);
    color: var(--text-light);
    max-width: var(--max-width);
}

.main-heading-name {
    font-size: 3rem;
    font-family: 'Roboto', sans-serif;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.02em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.main-heading-title {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

/* ===========================================
   Sections
   =========================================== */
.section-heading {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80px;
    padding: var(--spacing-sm);
    width: 100%;
    background-color: var(--gray-medium);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.connect {
    background-color: var(--secondary);
}

/* ===========================================
   Content Groups
   =========================================== */
.content-group {
    margin: var(--spacing-lg) auto;
    padding: 0 var(--spacing-sm);
    max-width: var(--max-width);
}

.main-content {
    background-color: var(--gray-light);
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.content-element {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.content-element:last-child {
    margin-bottom: 0;
}

/* ===========================================
   Project Cards
   =========================================== */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) auto;
    padding: 0 var(--spacing-sm);
    max-width: var(--max-width);
}

.project-card {
    background-color: var(--secondary);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.content-heading {
    display: flex;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.project-heading {
    flex: 1;
    min-width: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-dark);
}

.project-link-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.project-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--gray-light);
    transition: background-color var(--transition), transform var(--transition);
}

.project-link:hover,
.project-link:focus {
    background-color: var(--accent);
    transform: scale(1.1);
}

.project-link:hover .project-icon,
.project-link:focus .project-icon {
    transform: scale(1.1);
}

.project-icon {
    font-size: 1.25rem;
    transition: transform var(--transition);
}

/* Project Icon Colors */
.project-icon.icon-github { color: #333; }
.project-icon.icon-external { color: #0a66c2; }

.project-card hr {
    border: none;
    border-top: 1px solid var(--gray-medium);
    margin: var(--spacing-sm) 0;
}

/* ===========================================
   Skills Section
   =========================================== */
.skills-section-wrapper {
    background: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%);
    padding: var(--spacing-lg) 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.skill-item {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-sm);
    border-radius: 12px;
    background-color: var(--secondary);
    transition: transform var(--transition), box-shadow var(--transition);
    gap: var(--spacing-xs);
    box-shadow: var(--shadow-sm);
}

.skill-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.skill-icon {
    font-size: 2.5rem;
    transition: transform var(--transition);
}

.skill-item:hover .skill-icon {
    transform: scale(1.1);
}

/* Skill Icon Colors */
.skill-icon.icon-js { color: #f7df1e; }
.skill-icon.icon-java { color: #007396; }
.skill-icon.icon-node { color: #339933; }
.skill-icon.icon-react { color: #61dafb; }
.skill-icon.icon-html { color: #e34f26; }
.skill-icon.icon-css { color: #1572b6; }
.skill-icon.icon-python { color: #3776ab; }
.skill-icon.icon-cdk { color: #ff9900; }
.skill-icon.icon-system { color: #6c5ce7; }

.skill-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-dark);
    text-align: center;
}

/* ===========================================
   Contact Section
   =========================================== */
.contact-elements {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-element {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--gray-light);
    transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.contact-element:hover,
.contact-element:focus-within {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.contact-element a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.contact-icon {
    font-size: 1.75rem;
    transition: transform var(--transition);
}

.contact-element:hover .contact-icon,
.contact-element:focus-within .contact-icon {
    transform: scale(1.1);
}

/* Contact Icon Colors */
.contact-icon.icon-email { color: #ea4335; }
.contact-icon.icon-linkedin { color: #0a66c2; }
.contact-icon.icon-github { color: #333; }

.contact-element:hover,
.contact-element:focus-within {
    background-color: var(--gray-medium);
}

/* ===========================================
   Footer
   =========================================== */
.footer {
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    min-height: 60px;
    padding: var(--spacing-sm);
}

.footer-element {
    font-size: 0.875rem;
    color: var(--secondary);
    text-align: center;
}

/* ===========================================
   Responsive - Tablet (768px+)
   =========================================== */
@media screen and (min-width: 768px) {
    .nav-bar {
        height: var(--nav-height-desktop);
        padding: 0 var(--spacing-md);
    }

    .nav-toggle-label {
        display: none;
    }

    .nav-links {
        position: static;
        flex-direction: row;
        max-height: none;
        width: auto;
        box-shadow: none;
        background-color: transparent;
    }

    .nav-bar-element {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .nav-bar-element::after {
        left: var(--spacing-sm);
    }

    .nav-bar-element:hover::after,
    .nav-bar-element:focus::after {
        width: calc(100% - var(--spacing-sm) * 2);
    }

    .home-page-banner {
        height: calc(100vh - var(--nav-height-desktop));
    }

    .home-banner-text {
        padding: var(--spacing-lg);
    }

    .main-heading-name {
        font-size: 4rem;
    }

    .main-heading-title {
        font-size: 2.5rem;
    }

    .content-group {
        padding: 0 var(--spacing-md);
    }

    .main-content {
        padding: var(--spacing-lg);
    }

    .content-element {
        font-size: 1.125rem;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: 0 var(--spacing-md);
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        padding: 0 var(--spacing-md);
    }

    .skill-icon {
        font-size: 3rem;
    }

    .skill-label {
        font-size: 0.9375rem;
    }

    .contact-element {
        width: 70px;
        height: 70px;
    }

    .contact-icon {
        font-size: 2rem;
    }
}

/* ===========================================
   Responsive - Desktop (1024px+)
   =========================================== */
@media screen and (min-width: 1024px) {
    .nav-bar-element {
        font-size: 1.125rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .main-heading-name {
        font-size: 5rem;
    }

    .main-heading-title {
        font-size: 3rem;
    }

    .section-heading {
        font-size: 1.75rem;
    }

    .project-heading {
        font-size: 1.5rem;
    }

    .skill-icon {
        font-size: 3.5rem;
    }

    .skill-label {
        font-size: 1rem;
    }
}

/* ===========================================
   Responsive - Large Desktop (1440px+)
   =========================================== */
@media screen and (min-width: 1440px) {
    .main-heading-name {
        font-size: 6rem;
    }

    .main-heading-title {
        font-size: 3.5rem;
    }
}

/* ===========================================
   Accessibility - Focus States
   =========================================== */
.nav-bar-element:focus,
.project-link:focus,
.contact-element a:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.nav-toggle-label:focus-within {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

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

    html {
        scroll-behavior: auto;
    }
}