/* style.css */
/* --- Global Styles & Variables --- */
:root {
    --primary-color: #243b55; /* Mid-tone navy from the logo */
    --secondary-color: #141e30; /* Darkest midnight blue from the logo */
    --accent-color: #3a6088; /* Lighter steel blue from the logo edges */
    --light-gray-color: #f8f9fa; 
    --medium-gray-color: #e9ecef; 
    --dark-gray-color: #2c3e50; 
    --text-color: #333333;
    --light-text-color: #ffffff;
    --body-font: 'Roboto', sans-serif;
    --heading-font: 'Montserrat', sans-serif;
    --header-height-initial: 80px;
    --header-height-scrolled: 60px;
    --transition-speed: 0.3s;
    --container-width: 1140px;
    --border-radius: 8px;
    --box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}





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

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

body {
    font-family: var(--body-font);
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--light-text-color);
    padding-top: var(--header-height-initial); /* Space for the fixed header */
    overflow-x: hidden; /* Prevent horizontal scroll */
}

.container {
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 15px;
}

h1, h2, h3 {
    font-family: var(--heading-font);
    color: var(--dark-gray-color);
    margin-bottom: 0.75em;
    line-height: 1.3;
}

h1 { font-size: 2.8rem; }
h2 { font-size: 2.2rem; text-align: center; margin-bottom: 1.5em; position: relative; }
h2::after { /* Subtle underline for section titles */
    content: '';
    display: block;
    width: 70px;
    height: 3px;
    background-color: var(--accent-color);
    margin: 0.5em auto 0;
}
h3 { font-size: 1.5rem; color: var(--primary-color); }

p {
    margin-bottom: 1em;
    color: #555;
}

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

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

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--border-radius);
}

ul { list-style: none; }

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--dark-gray-color);
    padding: 12px 28px;
    border-radius: var(--border-radius);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.cta-button:hover {
    background-color: #e0a800; /* Darker accent */
    color: var(--dark-gray-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

/* --- Header --- */
#main-header {
    background-color: var(--light-text-color);
    height: var(--header-height-initial);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    transition: height var(--transition-speed) ease, background-color var(--transition-speed) ease;
}

#main-header.scrolled {
    height: var(--header-height-scrolled);
    background-color: rgba(255, 255, 255, 0.97); /* Slightly transparent white when scrolled */
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

#logo-img {
    max-height: 80px; /* Sizes the logo to fit the initial header */
    width: auto;
    display: block;
    transition: max-height var(--transition-speed) ease;
}

#main-header.scrolled #logo-img {
    max-height: 40px; /* Shrinks the logo smoothly when scrolling down */
}

#main-nav ul {
    display: flex;
}

#main-nav ul li {
    margin-left: 25px;
}

#main-nav ul li a {
    font-family: var(--heading-font);
    font-weight: 600;
    color: var(--dark-gray-color);
    font-size: 0.95rem;
    padding: 8px 12px;
    border-radius: 4px;
    position: relative;
}
#main-nav ul li a::after { /* Underline effect on hover/active */
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width var(--transition-speed) ease;
}
#main-nav ul li a:hover::after,
#main-nav ul li a.active::after {
    width: 80%;
}
#main-nav ul li a.active {
    color: var(--primary-color);
}


/* Mobile Menu Toggle Button */
#mobile-menu-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001; /* Above nav */
}
#mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 5px 0;
    border-radius: 2px;
    transition: all var(--transition-speed) ease;
}

/* Mobile Menu Toggle Animation (X icon) */
#mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
#mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}
#mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}


/* --- Sections General Styling --- */
main section {
    padding: 80px 0;
}
main section:nth-of-type(even) { /* Alternating background */
    background-color: var(--light-gray-color);
}

/* --- Hero Section --- */
#hero {
    background: linear-gradient(rgba(0, 63, 107, 0.7), rgba(0, 90, 156, 0.8)), url('[https://placehold.co/1920x1080/003F6B/FFFFFF?text=Professional+Background&font=Montserrat](https://placehold.co/1920x1080/003F6B/FFFFFF?text=Professional+Background&font=Montserrat)') no-repeat center center/cover;
    /* Replace placeholder with an actual high-quality background image */
    color: var(--light-text-color);
    min-height: calc(90vh - var(--header-height-initial));
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--header-height-initial); /* Adjust for fixed header */
    margin-top: calc(-1 * var(--header-height-initial)); /* Pull up to fill space */
}
#hero h1 {
    color: var(--light-text-color);
    font-size: 3.2rem;
    margin-bottom: 0.3em;
}
#hero .tagline {
    color: var(--light-text-color);
    font-size: 1.6rem;
    font-family: var(--body-font);
    font-weight: 300;
    margin-bottom: 1.5em;
}
#hero .hero-cta {
    font-size: 1.1rem;
    padding: 15px 35px;
}

/* --- About Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    align-items: center;
}
.about-image-container .profile-image {
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 5px solid var(--light-text-color);
}

/* --- Services Section --- */
.service-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.card {
    background-color: var(--light-text-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}
.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}
.card-icon {
    margin-bottom: 20px;
}
.card-icon svg {
    width: 48px;
    height: 48px;
    color: var(--accent-color);
}
.card h3 {
    margin-bottom: 15px;
}

/* --- Interests Section --- */
#interests {
    text-align: center;
}
#interests .interests-content p {
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}
.interest-icons {
    margin-top: 25px;
    font-size: 2.5rem;
}
.interest-icons span {
    margin: 0 15px;
    display: inline-block;
    transition: transform var(--transition-speed) ease;
}
.interest-icons span:hover {
    transform: scale(1.2);
}

/* --- CV Section --- */
#cv {
    text-align: center;
    background-color: var(--secondary-color);
    color: var(--light-text-color);
}
#cv h2 {
    color: var(--light-text-color);
}
#cv h2::after {
    background-color: var(--accent-color); /* Ensure underline is visible on dark bg */
}
#cv p {
    color: var(--medium-gray-color);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
#cv .cta-button {
    margin-top: 20px;
}

/* --- Contact Section --- */
#contact {
    text-align: center;
}
#contact p {
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}
.contact-methods {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}
.contact-link {
    display: inline-flex; /* For aligning icon and text */
    align-items: center;
    padding: 10px 20px;
    border: 2px solid var(--medium-gray-color);
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all var(--transition-speed) ease;
}
.contact-link svg {
    margin-right: 8px;
    color: var(--primary-color);
    transition: color var(--transition-speed) ease;
}
.contact-link:hover {
    background-color: var(--primary-color);
    color: var(--light-text-color);
    border-color: var(--primary-color);
}
.contact-link:hover svg {
    color: var(--light-text-color);
}

/* --- Footer --- */
#main-footer {
    background-color: var(--dark-gray-color);
    color: var(--medium-gray-color);
    text-align: center;
    padding: 30px 0;
    font-size: 0.9rem;
}
#main-footer p {
    margin-bottom: 0;
    color: var(--medium-gray-color);
}

/* --- Responsive Design --- */
@media (max-width: 992px) {
    :root {
        --header-height-initial: 70px;
        --header-height-scrolled: 55px;
    }
    h1 { font-size: 2.5rem; }
    #hero h1 { font-size: 2.8rem; }
    h2 { font-size: 2rem; }

    .about-grid {
        grid-template-columns: 1fr; /* Stack on smaller screens */
        text-align: center;
    }
    .about-image-container {
        margin-top: 30px;
        order: -1; /* Image first on mobile */
        max-width: 300px;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 768px) {
    html { font-size: 15px; }
    body { padding-top: var(--header-height-initial); } /* Ensure this matches initial header height */

    #main-nav {
        display: none; /* Hide nav by default */
        position: absolute;
        top: var(--header-height-initial); /* Position below header */
        left: 0;
        width: 100%;
        background-color: var(--light-text-color);
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        padding-bottom: 10px; /* Add some padding at the bottom */
        max-height: calc(100vh - var(--header-height-initial)); /* Limit height */
        overflow-y: auto; /* Allow scrolling if content exceeds height */
    }
    #main-header.scrolled #main-nav {
        top: var(--header-height-scrolled); /* Adjust top position when header is scrolled */
    }

    #main-nav.active {
        display: block; /* Show when active */
    }

    #main-nav ul {
        flex-direction: column;
        align-items: center;
    }
    #main-nav ul li {
        margin: 0;
        width: 100%;
        text-align: center;
    }
    #main-nav ul li a {
        display: block;
        padding: 15px;
        border-bottom: 1px solid var(--medium-gray-color);
        width: 100%;
        border-radius: 0;
    }
    #main-nav ul li:last-child a {
        border-bottom: none;
    }
    #main-nav ul li a::after { /* Remove underline for mobile nav items */
        display: none;
    }
    #main-nav ul li a:hover,
    #main-nav ul li a.active {
        background-color: var(--light-gray-color);
        color: var(--primary-color);
    }


    #mobile-menu-toggle {
        display: block; /* Show hamburger icon */
    }

    #hero {
        min-height: calc(80vh - var(--header-height-initial));
    }
    #hero h1 { font-size: 2.4rem; }
    #hero .tagline { font-size: 1.3rem; }

    .service-cards-container {
        grid-template-columns: 1fr; /* Stack cards */
    }
    .card {
        margin-bottom: 20px;
    }
}

@media (max-width: 480px) {
    html { font-size: 14px; }
    #hero h1 { font-size: 2rem; }
    #hero .tagline { font-size: 1.1rem; }
    h2 { font-size: 1.8rem; }
    .cta-button, #cv .cta-button, #hero .hero-cta {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    .contact-methods {
        flex-direction: column;
        gap: 15px;
    }
    .contact-link {
        width: 100%;
        justify-content: center;
    }
}


/* --- Experience Timeline --- */
.timeline {
    border-left: 3px solid var(--accent-color);
    padding-left: 25px;
    margin: 40px auto 20px;
    max-width: 800px;
}
.timeline-item {
    margin-bottom: 40px;
    position: relative;
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: -34px;
    top: 5px;
    width: 15px;
    height: 15px;
    background-color: var(--light-text-color);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
}
.timeline-date {
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
    font-size: 0.95rem;
}
.timeline-content h3 {
    margin-bottom: 2px;
    color: var(--dark-gray-color);
    font-size: 1.3rem;
}
.timeline-content h4 {
    margin-bottom: 12px;
    color: #777;
    font-weight: 600;
    font-size: 1rem;
}

/* --- Skills Grid --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 30px;
}
.skill-category {
    background-color: var(--light-text-color);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}
.skill-category h3 {
    margin-bottom: 20px;
    font-size: 1.2rem;
    border-bottom: 2px solid var(--medium-gray-color);
    padding-bottom: 10px;
}
.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.skill-tags span {
    background-color: var(--secondary-color);
    color: var(--light-text-color);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}