:root {
    /* Colors */
    --bg-color: #0a192f;
    --text-color: #8892b0;
    --heading-color: #ccd6f6;
    --accent-color: #64ffda;
    --secondary-bg: #112240;
    --card-bg: #112240;

    /* Typography */
    --font-sans: 'Inter', sans-serif;
    --font-serif: 'Playfair Display', serif;

    /* Spacing */
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 32px;
    --spacing-xl: 64px;

    /* Transitions */
    --transition: all 0.3s ease-in-out;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    line-height: 1.6;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--heading-color);
    font-family: var(--font-serif);
    margin-bottom: var(--spacing-md);
}

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

ul {
    list-style: none;
}

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
}

.primary-btn {
    background-color: transparent;
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.primary-btn:hover {
    background-color: rgba(100, 255, 218, 0.1);
}

.text-btn {
    color: var(--accent-color);
    padding: 0;
}

.text-btn:hover {
    text-decoration: underline;
}

/* Header */
#main-header {
    position: sticky;
    top: 0;
    background-color: rgba(10, 25, 47, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--spacing-md) 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

#main-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--accent-color);
    font-weight: bold;
}

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--heading-color);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 1001;
}

/* Hero Section */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 0;
    position: relative;
    overflow: hidden;
}

/* Particles canvas covers entire viewport, sits behind content and doesn't block interactions */
#particles-canvas {
    position: fixed;
    inset: 0;                 /* top:0; right:0; bottom:0; left:0 */
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;     /* allow clicks through canvas */
    display: block;
    background: transparent;
}

.hero-content {
    position: relative;
    z-index: 1;
    width: 100%;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.highlight {
    color: var(--accent-color);
}

.subtitle {
    font-size: clamp(20px, 4vw, 28px);
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
}

/* Typing Animation */
.typing-container {
    display: inline-block;
}

.typing-text {
    display: inline-block;
    vertical-align: bottom;
    position: relative;
}

.typing-text::after {
    content: "|";
    display: inline-block;
    color: var(--accent-color);
    animation: blink-caret 0.75s step-end infinite;
    margin-left: 2px;
    font-weight: 100;
}

@keyframes blink-caret {

    from,
    to {
        opacity: 0;
    }

    50% {
        opacity: 1;
    }
}

/* Scroll Down Indicator */
.scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
    color: var(--accent-color);
    animation: bounce 2s infinite;
    z-index: 1;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0) translateX(-50%);
    }

    40% {
        transform: translateY(-10px) translateX(-50%);
    }

    60% {
        transform: translateY(-5px) translateX(-50%);
    }
}

/* Placeholders */
.placeholder-image {
    background-color: var(--secondary-bg);
    border: 2px dashed var(--text-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    font-weight: bold;
    transition: var(--transition);
}

.profile-placeholder {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    margin: 0 auto;
}

.profile-photo {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
    /* Focus on face */
    border: 3px solid var(--accent-color);
    box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
    display: block;
    margin: 0 auto;
    animation: float 4s ease-in-out infinite;
}

.section-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
    position: relative;
    display: flex;
    align-items: center;
}

.section-title::after {
    content: "";
    display: block;
    width: 300px;
    height: 1px;
    background-color: var(--text-color);
    margin-left: var(--spacing-md);
    opacity: 0.2;
}

/* Professional Timeline */
.timeline {
    border-left: 2px solid var(--secondary-bg);
    padding-left: var(--spacing-lg);
}

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

.timeline-item::before {
    content: "";
    position: absolute;
    left: calc(-1 * var(--spacing-lg) - 9px);
    top: 5px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--accent-color);
}

/* Projects grid & cards */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
    align-items: start;
}

/* Card look: base (no neon stroke) */
.project-card {
    background: linear-gradient(180deg, #071827 0%, #0b2b3a 100%);
    border-radius: 14px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
    max-width: 320px;
    margin: 0 auto;

    /* faster transition for stroke appearance */
    border: 1px solid transparent;
    box-shadow: 0 10px 30px rgba(2,8,16,0.6);
    transition: transform 110ms ease, box-shadow 110ms ease, border-color 110ms ease;
}

/* Card hover: show neon outer stroke + inner edge */
.project-card:hover,
.project-card:focus-within {
    transform: translateY(-6px);
    border-color: rgba(34,243,210,0.08);
    box-shadow:
        0 0 0 2px rgba(34,243,210,0.12),
        inset 0 0 0 1px rgba(34,243,210,0.9),
        0 14px 36px rgba(2,8,16,0.68);
    transition: transform 110ms ease, box-shadow 110ms ease, border-color 110ms ease;
}

/* Remove white inset around project image */
/* Image zoom on hover */
.project-image {
    overflow: hidden;        /* prevent scaled image from overflowing */
    border-radius: 12px;
}

.project-image img {
    display: block;
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: transform 350ms cubic-bezier(.2,.9,.2,1), filter 350ms;
    will-change: transform;
    transform-origin: center center;
}

/* Small zoom when card is hovered or focused */
.project-card:hover .project-image img,
.project-card:focus-within .project-image img {
    transform: scale(1.06);
}

/* Title styling — centered and slightly larger */
.project-info h3 {
    margin: 0.4rem 0 0;
    font-family: "Playfair Display", serif;
    font-weight: 700;
    font-size: 1.05rem;
    color: #e6f6f4;
}

/* Description: lighter, comfortable line-height */
.project-info p {
    margin: 0 0 0.75rem; /* add bottom gap under text */
    color: rgba(230,246,244,0.78);
    font-size: 0.95rem;
    line-height: 1.4;
    padding: 0 0.25rem;
}

/* Center the project button */
.project-links {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center; /* center button horizontally */
    width: 100%;             /* ensure full-width container for proper centering */
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

/* Hobbies */
.hobbies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    justify-content: center;
}

.hobby-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: block;
    /* Ensure anchor tag behaves like a block */
    text-decoration: none;
    /* Remove underline from links */
    color: inherit;
    /* Inherit text color */
}

.hobby-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border-color: var(--accent-color);
}

.hobby-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 1rem;
    transition: transform 0.3s ease;
    display: block;
}

.hobby-card:hover .hobby-image {
    transform: scale(1.05);
}

.hobby-card h3 {
    color: var(--heading-color);
    margin-bottom: 0.5rem;
}

.skill-icon {
    color: var(--accent-color);
    margin-right: 8px;
    font-size: 1.1rem;
}

.hobby-item {
    background: var(--card-bg);
    padding: 10px 15px;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Family */
.family-content {
    text-align: center;
}

.family-placeholder {
    width: 100%;
    max-width: 600px;
    height: 400px;
    margin: 0 auto;
}

/* Contact Form */
.contact-form {
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin: 0 auto;
    /* Centering fix */
}

.contact-form input,
.contact-form textarea {
    padding: 12px;
    background-color: var(--secondary-bg);
    border: 1px solid transparent;
    border-radius: 4px;
    color: var(--heading-color);
    font-family: var(--font-sans);
}

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

#contact .container {
    text-align: center;
    /* Center contact info */
}

#contact .section-title {
    justify-content: center;
    /* Center title */
}

#contact .section-title::after {
    display: none;
    /* Remove line for centered title */
}

/* Exact visible "View Code" button style (matches attached image) */
.code-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.56rem 0.92rem;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.95rem;
    text-decoration: none;
    color: #39f0d8;                         /* teal text */
    background: rgba(6, 20, 36, 0.85);      /* dark, slightly translucent to match page */
    border: 1px solid transparent; /* no visible stroke by default */
    box-shadow: 0 4px 10px rgba(2,8,16,0.45);
    -webkit-font-smoothing: antialiased;
    transition: transform 120ms ease, box-shadow 140ms ease, border-color 140ms ease;
}

/* icon color and sizing */
.code-btn i {
    color: #39f0d8;
    font-size: 1.05rem;
    line-height: 1;
}

/* hover/focus: tiny lift, keep the neon inner stroke visible */
.code-btn:hover,
.code-btn:focus {
    transform: translateY(-2px);
    border-color: rgba(57,240,216,0.22);
    box-shadow:
        inset 0 0 0 1px rgba(57,240,216,0.95), /* bright inner cyan stroke */
        0 8px 20px rgba(2,8,16,0.55);
    outline: none;
}

/* pressed state */
.code-btn:active {
    transform: translateY(0);
    box-shadow:
        inset 0 0 0 1px rgba(57,240,216,0.9),
        0 4px 12px rgba(2,8,16,0.45);
}

/* Footer */
footer {
    padding: var(--spacing-md) 0;
    text-align: center;
    font-size: 0.9rem;
}

/* Animations */
.animate-fade-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s forwards;
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.2s;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        width: 70%;
        max-width: 300px;
        background-color: var(--secondary-bg);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transform: translateX(100%);
        transition: transform 0.3s ease-in-out;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.5);
        z-index: 1000;
        display: flex;
        /* Override display: none */
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .nav-links li {
        margin: 20px 0;
        opacity: 0;
    }

    .nav-links.active li {
        animation: fadeInRight 0.5s ease forwards;
        animation-delay: 0.3s;
    }

    @keyframes fadeInRight {
        0% {
            opacity: 0;
            transform: translateX(50px);
        }

        100% {
            opacity: 1;
            transform: translateX(0);
        }
    }

    .mobile-menu-btn {
        display: block;
    }

    .section-title::after {
        width: 100px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .profile-placeholder {
        width: 200px;
        height: 200px;
        margin-top: var(--spacing-lg);
    }
}

/* Scroll Animations */
.scroll-hidden {
    opacity: 0;
    transition: all 1s ease-out;
}

.fade-up.scroll-hidden {
    transform: translateY(30px);
}

.slide-in-left.scroll-hidden {
    transform: translateX(-50px);
}

.slide-in-right.scroll-hidden {
    transform: translateX(50px);
}

.pop-in.scroll-hidden {
    transform: scale(0.8);
}

.scroll-visible {
    opacity: 1;
    transform: translateY(0) translateX(0) scale(1) !important;
}

/* Staggered Delays */
.delay-100 {
    transition-delay: 100ms;
}

.delay-200 {
    transition-delay: 200ms;
}

.delay-300 {
    transition-delay: 300ms;
}

.delay-400 {
    transition-delay: 400ms;
}

/* Floating Animation */
@keyframes float {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-15px);
    }

    100% {
        transform: translateY(0px);
    }
}

.floating {
    animation: float 4s ease-in-out infinite;
}

/* Back to Top Button */
#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--accent-color);
    color: var(--bg-color);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
    cursor: pointer;
    display: none;
    /* Hidden by default */
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 1000;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

#back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
}

#back-to-top.visible {
    display: flex;
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}