/* main_demo2.css - Demo 2: Bold & Graphic */

/* --------------------
   RESET & BASIC SETUP
   -------------------- */

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

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

body {
    font-family: var(--font-body);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden; /* Prevent horizontal scroll */
}

/* --------------------
   CSS VARIABLES
   -------------------- */

:root {
    /* Light Theme (Default) */
    --color-background: #FFFFFF;
    --color-text-primary: #000000;
    --color-text-secondary: #333333;
    --color-accent: #FF3366; /* Vibrant Pink */
    --color-accent-secondary: #3366FF; /* Vibrant Blue */
    --color-header-bg: rgba(255, 255, 255, 0.95);
    --color-card-bg: #F0F0F0;
    --color-border: #DDDDDD;

    /* Fonts */
    --font-heading: 'Montserrat', sans-serif; /* Bold, geometric sans-serif */
    --font-body: 'Montserrat', sans-serif;    /* Same for consistency */

    /* Spacing */
    --spacing-unit: 1rem; /* 16px */
    --container-width: 1200px;
    --header-height: 80px;
}

body[data-theme='dark'] {
    --color-background: #111111;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #CCCCCC;
    --color-accent: #FF4D7F; /* Brighter Pink for dark mode */
    --color-accent-secondary: #4D7FFF; /* Brighter Blue for dark mode */
    --color-header-bg: rgba(17, 17, 17, 0.95);
    --color-card-bg: #222222;
    --color-border: #333333;
}

/* --------------------
   UTILITIES
   -------------------- */

.container {
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

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

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* --------------------
   HEADER & NAVIGATION
   -------------------- */

.site-header-d2 {
    background-color: var(--color-header-bg);
    padding: calc(var(--spacing-unit) * 1.2) 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 2px solid var(--color-accent);
}

.site-header-d2 .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-d2 {
    font-family: var(--font-heading);
    font-size: calc(var(--spacing-unit) * 1.8);
    font-weight: 800;
    color: var(--color-text-primary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.main-nav-d2 ul {
    list-style: none;
    display: flex;
}

.main-nav-d2 li {
    margin-left: calc(var(--spacing-unit) * 2);
}

.main-nav-d2 a {
    font-family: var(--font-heading);
    font-size: var(--spacing-unit);
    color: var(--color-text-primary);
    font-weight: 600;
    padding: 0.5rem 0;
    position: relative;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.main-nav-d2 a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.main-nav-d2 a:hover::after, .main-nav-d2 a.active::after {
    width: 100%;
}

.main-nav-d2 a:hover {
    color: var(--color-accent);
}

.menu-toggle-button-d2 {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    color: var(--color-text-primary);
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle-button-d2 svg {
    width: 28px;
    height: 28px;
}

.mobile-nav-d2 {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--color-background);
    border-bottom: 2px solid var(--color-accent);
    z-index: 999;
    padding: var(--spacing-unit) 0;
}

.mobile-nav-d2 ul {
    list-style: none;
    text-align: center;
}

.mobile-nav-d2 li {
    margin-bottom: var(--spacing-unit);
}

.mobile-nav-d2 a {
    font-family: var(--font-heading);
    font-size: calc(var(--spacing-unit) * 1.2);
    color: var(--color-text-primary);
    padding: 0.5rem;
    display: block;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
}

/* --------------------
   HERO SECTION
   -------------------- */

.hero-section-d2 {
    
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--header-height);
    background-color: var(--color-background);
    position: relative;
    overflow: hidden;

}

.hero-graphic-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(45deg, var(--color-accent) 25%, transparent 25%), 
        linear-gradient(-45deg, var(--color-accent) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--color-accent-secondary) 75%),
        linear-gradient(-45deg, transparent 75%, var(--color-accent-secondary) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    opacity: 0.05;
    z-index: 0;
}

.hero-section-d2 .container {
    position: relative;
    z-index: 1;
}

.hero-title-d2 {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 900;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-unit);
    text-transform: uppercase;
    letter-spacing: 2px;
    line-height: 1.1;
}

.hero-subtitle-d2 {
    font-family: var(--font-body);
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 3);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.cta-button-d2 {
    display: inline-block;
    background-color: var(--color-accent);
    color: #FFFFFF;
    font-family: var(--font-heading);
    font-size: calc(var(--spacing-unit) * 1.1);
    font-weight: 700;
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
    border-radius: 0;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cta-button-d2::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: left 0.5s ease;
}

.cta-button-d2:hover {
    background-color: var(--color-accent-secondary);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    color: #000000;
}

.cta-button-d2:hover::before {
    left: 100%;
    color: #000000;
}

/* --------------------
   CONTENT SECTIONS
   -------------------- */

.content-section-d2 {
    padding: calc(var(--spacing-unit) * 6) 0;
    position: relative;
}

.content-section-d2:nth-child(odd) {
    background-color: var(--color-card-bg);
}

.section-title-d2 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    font-weight: 900;
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 4);
    text-transform: uppercase;
    letter-spacing: 3px;
    position: relative;
}

.section-title-d2::after {
    content: '';
    display: block;
    width: 80px;
    height: 5px;
    background-color: var(--color-accent);
    margin: calc(var(--spacing-unit) * 0.8) auto 0;
}

/* About Section */
.about-content-d2 {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: calc(var(--spacing-unit) * 4);
}

.profile-image-container-d2 {
    flex: 1 1 350px;
    max-width: 400px;
    margin: 0 auto;
    position: relative;
}

.profile-image-container-d2 img {
    border: none;
    box-shadow: 15px 15px 0 var(--color-accent);
}

.profile-image-container-d2::before {
    content: '';
    position: absolute;
    top: -15px;
    left: -15px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-accent-secondary);
    z-index: -1;
}

.bio-text-d2 {
    flex: 2 1 450px;
}

.bio-text-d2 p {
    font-size: calc(var(--spacing-unit) * 1.2);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-unit);
    font-weight: 500;
}

/* Experience Section */
.experience-list-d2 .experience-item-d2 {
    background-color: var(--color-background);
    padding: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 2);
    border-left: 8px solid var(--color-accent);
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.experience-item-d2:hover {
    transform: translateX(5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.experience-item-d2 h3 {
    font-family: var(--font-heading);
    font-size: calc(var(--spacing-unit) * 1.4);
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 800;
}

.experience-item-d2 .experience-dates-d2 {
    font-size: calc(var(--spacing-unit) * 1);
    color: var(--color-accent);
    margin-bottom: calc(var(--spacing-unit) * 1);
    font-weight: 600;
    text-transform: uppercase;
}

/* Skills Section */
.subsection-title-d2 {
    font-family: var(--font-heading);
    font-size: calc(var(--spacing-unit) * 1.8);
    color: var(--color-text-primary);
    margin-top: calc(var(--spacing-unit) * 3);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 700;
}

.skills-list-d2, .languages-list-d2 {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: calc(var(--spacing-unit) * 1.2);
}

.skill-tag-d2, .language-tag-d2 {
    background-color: var(--color-background);
    color: var(--color-text-primary);
    padding: calc(var(--spacing-unit) * 0.8) calc(var(--spacing-unit) * 1.5);
    font-size: calc(var(--spacing-unit) * 0.9);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 2px solid var(--color-accent);
    transition: background-color 0.3s, color 0.3s, transform 0.2s;
}

.skill-tag-d2:hover, .language-tag-d2:hover {
    background-color: var(--color-accent);
    color: #FFFFFF;
    transform: translateY(-3px);
}

/* Projects Section */
.filter-buttons-d2 {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.filter-btn-d2 {
    background: none;
    border: 2px solid var(--color-accent);
    color: var(--color-text-primary);
    padding: calc(var(--spacing-unit) * 0.7) calc(var(--spacing-unit) * 1.5);
    margin: 0 calc(var(--spacing-unit) * 0.5);
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s, transform 0.2s;
    font-family: var(--font-heading);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.filter-btn-d2.active, .filter-btn-d2:hover {
    background-color: var(--color-accent);
    color: #FFFFFF;
    transform: translateY(-2px);
}

.project-gallery-d2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
}

.project-item-d2 {
    background-color: var(--color-background);
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-item-d2:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.15);
}

.project-image-container-d2 {
    position: relative;
    overflow: hidden;
    height: 250px; /* Fixed height for consistency */
}

.project-image-container-d2 img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-item-d2:hover .project-image-container-d2 img {
    transform: scale(1.05);
}

.project-info-d2 {
    padding: calc(var(--spacing-unit) * 2);
    border-top: 5px solid var(--color-accent);
}

.project-info-d2 h3 {
    font-family: var(--font-heading);
    font-size: calc(var(--spacing-unit) * 1.3);
    color: var(--color-text-primary);
    margin-bottom: calc(var(--spacing-unit) * 0.8);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 800;
}

.project-info-d2 p {
    font-size: calc(var(--spacing-unit) * 1);
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 1.2);
}

.project-link-d2 {
    font-size: calc(var(--spacing-unit) * 0.9);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    display: inline-block;
    padding-bottom: 3px;
}

.project-link-d2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-accent);
    transition: transform 0.3s ease;
    transform-origin: right;
    transform: scaleX(0);
}

.project-link-d2:hover::after {
    transform-origin: left;
    transform: scaleX(1);
}

/* Contact Section */
.contact-intro-d2 {
    text-align: center;
    font-size: calc(var(--spacing-unit) * 1.3);
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 2);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 500;
}

.contact-details-d2 {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.contact-details-d2 p {
    font-size: calc(var(--spacing-unit) * 1.2);
    margin-bottom: calc(var(--spacing-unit) * 0.8);
    font-weight: 500;
}

.social-media-links-d2 {
    text-align: center;
}

.social-media-links-d2 a {
    margin: 0 calc(var(--spacing-unit) * 1);
    display: inline-block;
    transition: transform 0.3s ease;
}

.social-media-links-d2 img {
    width: 32px;
    height: 32px;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.social-media-links-d2 a:hover {
    transform: translateY(-3px);
}

.social-media-links-d2 a:hover img {
    opacity: 1;
}

/* --------------------
   FOOTER
   -------------------- */

.site-footer-d2 {
    background-color: var(--color-text-primary);
    color: var(--color-background);
    padding: calc(var(--spacing-unit) * 3) 0;
    text-align: center;
    font-size: calc(var(--spacing-unit) * 0.9);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.site-footer-d2 p {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    font-weight: 600;
}

.site-footer-d2 .attribution {
    font-size: calc(var(--spacing-unit) * 0.8);
    opacity: 0.7;
    text-transform: none;
    letter-spacing: normal;
}

/* --------------------
   ANIMATIONS (GSAP will handle complex ones)
   -------------------- */

/* Basic fade-in for elements animated by GSAP to prevent flash of unstyled content if JS is slow */
/* .animate-on-load, .animate-on-scroll {
    opacity: 0;
} */

/* --------------------
   RESPONSIVE DESIGN
   -------------------- */

@media (max-width: 768px) {
    .main-nav-d2 {
        display: none; /* Hide desktop nav */
    }

    .menu-toggle-button-d2 {
        display: block; /* Show hamburger */
    }

    .mobile-nav-d2.active {
        display: block;
    }

    .hero-title-d2 {
        font-size: 2.8rem;
    }

    .hero-subtitle-d2 {
        font-size: 1.2rem;
    }

    .about-content-d2 {
        flex-direction: column;
        text-align: center;
    }

    .profile-image-container-d2 {
        margin-bottom: var(--spacing-unit);
    }

    .project-gallery-d2 {
        grid-template-columns: 1fr; /* Single column on smaller screens */
    }
    
    .filter-btn-d2 {
        margin-bottom: calc(var(--spacing-unit) * 0.5);
    }
}