/* =============================================================================
   styles.css — Enhanced & Interactive Portfolio Styles (v7.8 - Layout & Text Adjustments)
   ============================================================================= */

:root {
    /* Color Palette - Dark Theme (Default) */
    --font-primary: 'Inter', sans-serif;
    --font-secondary: 'Poppins', sans-serif;

    --accent-primary: #57f8c5; /* Bright Mint Green */
    --accent-primary-rgb: 87, 248, 197;
    --accent-primary-darker: #44e0b1;
    --accent-secondary: #6366f1; /* Indigo */
    --accent-secondary-rgb: 99, 102, 241;
    --accent-secondary-darker: #4f52d1;
    --accent-danger: #f43f5e; /* Rose */

    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-headings: #f8fafc;
    --text-on-accent: #0a192f;     /* Dark text for light accent buttons */


    --bg-dark-primary: #071323;
    --bg-dark-primary-rgb: 7, 19, 35;
    --bg-dark-secondary: #16202f;
    --bg-dark-tertiary: #2a3547;
    --bg-dark-gradient-end: #202a3a;


    --body-gradient-dark: linear-gradient(145deg, var(--bg-dark-primary) 0%, var(--bg-dark-secondary) 55%, var(--bg-dark-gradient-end) 100%);

    --border-primary: rgba(148, 163, 184, 0.2);
    --border-secondary: rgba(148, 163, 184, 0.1);
    --border-accent: var(--accent-primary);

    --shadow-color: rgba(0, 0, 0, 0.5);
    --shadow-color-light: rgba(var(--accent-primary-rgb), 0.2);
    --shadow-sm: 0 2px 4px var(--shadow-color);
    --shadow-md: 0 4px 8px var(--shadow-color);
    --shadow-lg: 0 10px 20px var(--shadow-color), 0 6px 6px var(--shadow-color);

    --glass-bg: rgba(22, 32, 47, 0.7);
    --glass-border: rgba(148, 163, 184, 0.15);
    --glass-blur: blur(8px);

    --form-input-bg: var(--bg-dark-secondary);
    --form-input-border: var(--bg-dark-tertiary);
    --form-input-focus-border: var(--accent-primary);
    --form-input-label-bg-active: var(--bg-dark-primary);

    --skill-card-bg: var(--bg-dark-secondary);
    --skill-card-hover-bg: var(--bg-dark-tertiary);
    --skill-card-border: var(--border-secondary);
    --skill-card-hover-border: var(--accent-primary);
    --skill-center-display-bg: var(--bg-dark-primary);
    --skill-center-display-border: var(--accent-primary);
    --skill-center-display-size: clamp(140px, 18vw, 170px); /* Slightly smaller center */
    --skill-icon-filter: drop-shadow(0 2px 3px rgba(var(--accent-primary-rgb), 0.3));


    --project-card-bg: var(--bg-dark-secondary);
    --project-card-hover-bg: var(--bg-dark-tertiary);
    --project-card-border: var(--border-secondary);
    --project-card-hover-border: var(--accent-primary);
    --tech-tag-bg: rgba(var(--accent-primary-rgb), 0.1);
    --tech-tag-color: var(--accent-primary);
    --tech-tag-border: rgba(var(--accent-primary-rgb), 0.2);


    --timeline-item-bg: var(--bg-dark-secondary);
    --timeline-line-color: var(--accent-secondary);
    --timeline-dot-color: var(--accent-primary);

    --nav-height: 70px;
    --content-width: 90%;
    --max-width: 1100px;
    --radius-sm: 6px; --radius-md: 8px; --radius-lg: 12px; --radius-xl: 16px;
    --radius-pill: 9999px; --radius-circle: 50%;
    --transition-fast: 0.2s ease-out;
    --transition-std: 0.3s ease-out;
    --transition-slow: 0.5s ease-in-out;

    --text-base-size: 1rem;
    --text-scale-ratio: 1.2;
    --text-sm: calc(var(--text-base-size) / var(--text-scale-ratio));
    --text-lg: calc(var(--text-base-size) * var(--text-scale-ratio));
    --text-xl: calc(var(--text-lg) * var(--text-scale-ratio));
    --text-xxl: calc(var(--text-xl) * var(--text-scale-ratio));

    --section-padding-vertical: clamp(4rem, 8vh, 6rem);
    --gap-xs: 0.25rem; --gap-sm: 0.5rem; --gap-md: 1rem; --gap-lg: 1.5rem; --gap-xl: 2rem; --gap-xxl: 3rem;
}

body.light-theme {
    --accent-primary: #5046e4;
    --accent-primary-rgb: 80, 70, 228;
    --accent-primary-darker: #4338ca;
    --accent-secondary: #0891b2;
    --accent-secondary-rgb: 8, 145, 178;
    --accent-secondary-darker: #0e7490;
    --text-on-accent: #ffffff;

    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-headings: #111827;

    --bg-dark-primary: #f0f7ff;
    --bg-dark-primary-rgb: 240, 247, 255;
    --bg-dark-secondary: #ffffff;
    --bg-dark-tertiary: #e0eafc;
    --bg-light-gradient-end: #d4e0ff;


    --body-gradient-light: linear-gradient(145deg, var(--bg-dark-primary) 0%, var(--bg-dark-tertiary) 55%, var(--bg-light-gradient-end) 100%);


    --border-primary: #d1d5db;
    --border-secondary: #e5e7eb;
    --border-accent: var(--accent-primary);


    --shadow-color: rgba(100, 116, 139, 0.2);
    --shadow-color-light: rgba(var(--accent-primary-rgb), 0.15);


    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(0, 0, 0, 0.08);

    --form-input-bg: #ffffff;
    --form-input-border: var(--border-primary);
    --form-input-label-bg-active: var(--bg-dark-primary);

    --skill-card-bg: var(--bg-dark-secondary);
    --skill-card-hover-bg: #f9fafb;
    --skill-center-display-bg: var(--bg-dark-secondary);
    --skill-icon-filter: drop-shadow(0 2px 3px rgba(var(--accent-primary-rgb), 0.2));


    --project-card-bg: var(--bg-dark-secondary);
    --project-card-hover-bg: #f9fafb;
    --tech-tag-bg: rgba(var(--accent-primary-rgb), 0.08);
    --tech-tag-color: var(--accent-primary);
    --tech-tag-border: rgba(var(--accent-primary-rgb), 0.15);


    --timeline-item-bg: var(--bg-dark-secondary);
}

/* Global Resets & Base Styles */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-height) + 1rem); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
    font-family: var(--font-primary);
    font-size: var(--text-base-size);
    line-height: 1.65;
    background: var(--body-gradient-dark);
    background-size: 400% 400%;
    animation: backgroundShift 25s ease infinite alternate;
    color: var(--text-primary);
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    transition: background-color var(--transition-std), color var(--transition-std);
}
body.light-theme {
    background: var(--body-gradient-light);
    background-size: 400% 400%;
    animation: backgroundShift 25s ease infinite alternate;
}
body.nav-open { overflow-y: hidden; }

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
input, button, textarea, select { font: inherit; }
button { cursor: pointer; background: none; border: none; color: inherit; }
a { color: var(--accent-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover, a:focus-visible { color: var(--accent-secondary); text-decoration: none; }
strong, b { font-weight: 600; color: var(--text-headings); }
p { margin-bottom: var(--gap-md); max-width: 65ch; }
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-headings);
    margin-bottom: var(--gap-md);
    letter-spacing: -0.02em;
}
h1 { font-size: clamp(var(--text-xl), 6vw, 3rem); }
h2.section-title { font-size: clamp(var(--text-lg), 5vw, var(--text-xxl)); margin-bottom: var(--gap-xl); }
h3.subsection-title { font-size: var(--text-xl); margin-bottom: var(--gap-lg); color: var(--accent-secondary); }
h3.card-title, h3.project-title, h3.timeline-title { font-size: var(--text-lg); margin-bottom: var(--gap-sm); }

/* Layout & Containers */
.container { width: var(--content-width); max-width: var(--max-width); margin-left: auto; margin-right: auto; padding-left: var(--gap-md); padding-right: var(--gap-md); }
@media (min-width: 768px) { .container { padding-left: var(--gap-lg); padding-right: var(--gap-lg); } }
.section-padding { padding-top: var(--section-padding-vertical); padding-bottom: var(--section-padding-vertical); }
.text-center { text-align: center; }

/* Accessibility */
.skip-link { position: absolute; top: -40em; left: 1rem; background: var(--accent-primary); color: var(--text-on-accent); padding: var(--gap-sm) var(--gap-md); z-index: 10000; transition: top var(--transition-fast); border-radius: 0 0 var(--radius-sm) var(--radius-sm); font-weight: bold; }
.light-theme .skip-link { color: var(--text-on-accent); }
.skip-link:focus { top: 0; outline: 3px solid var(--accent-secondary); outline-offset: 2px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* Animations */
@keyframes backgroundShift { 0% { background-position: 0% 50%; } 100% { background-position: 100% 50%; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scaleUp { from { transform: scale(0.95); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(var(--accent-primary-rgb), 0.4); } 70% { box-shadow: 0 0 0 10px rgba(var(--accent-primary-rgb), 0); } 100% { box-shadow: 0 0 0 0 rgba(var(--accent-primary-rgb), 0); } }
@keyframes blink { 50% { opacity: 0; } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

[data-animate="fade-up"] { animation: fadeInUp 0.7s ease-out 0.3s backwards; }
[data-animate="fade-up-sm"] { animation: fadeInUp 0.5s ease-out 0.2s backwards; }
[data-animate="scale-up"] { animation: scaleUp 0.7s ease-out 0.3s backwards; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  *, *::before, *::after { animation-delay: -1ms !important; animation-duration: 1ms !important; animation-iteration-count: 1 !important; background-attachment: scroll !important; scroll-behavior: auto !important; transition-duration: 0s !important; transition-delay: 0s !important; }
  [data-animate] { animation: none; opacity: 1; transform: none; }
  body { animation: none !important; }
}

/* Particle Background */
#tsparticles {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* Card Style Base */
.card-style {
    background-color: var(--bg-dark-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--gap-lg);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
    transition: transform var(--transition-std), box-shadow var(--transition-std), border-color var(--transition-std);
}
.light-theme .card-style {
    box-shadow: 0 4px 6px -1px rgba(var(--shadow-color), 0.1), 0 2px 4px -1px rgba(var(--shadow-color), 0.06);
}
.card-style:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    border-color: var(--border-accent);
}
.light-theme .card-style:hover {
    box-shadow: 0 10px 15px -3px rgba(var(--shadow-color),0.15), 0 4px 6px -2px rgba(var(--shadow-color),0.1);
}

/* Navigation Bar */
#navbar {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--nav-height);
    background: rgba(var(--bg-dark-primary-rgb), 0.85);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    z-index: 1000;
    transition: background-color var(--transition-std), box-shadow var(--transition-std), border-bottom-color var(--transition-std);
    border-bottom: 1px solid transparent;
}
body.light-theme #navbar { background: rgba(var(--bg-dark-primary-rgb), 0.85); }

#navbar.scrolled {
    background: rgba(var(--bg-dark-primary-rgb), 0.95);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-bottom-color: var(--border-secondary);
}
body.light-theme #navbar.scrolled {
    box-shadow: 0 2px 10px rgba(100,116,139,0.1);
}

.nav-container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo img { height: 36px; vertical-align: middle; transition: transform var(--transition-fast); }
.logo .logo-text { font-family: var(--font-secondary); font-size: 1.8rem; font-weight: 700; color: var(--accent-primary); }
.logo a:hover img { transform: scale(1.05); }
.logo a:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 4px; border-radius: var(--radius-sm); }

.nav-controls { display: flex; align-items: center; gap: var(--gap-sm); }
@media (min-width: 881px) { .nav-controls { gap: var(--gap-md); } }

ul.nav-links-desktop { display: none; }
@media (min-width: 881px) {
    ul.nav-links-desktop { display: flex; gap: var(--gap-lg); list-style: none; }
    .nav-link {
        color: var(--text-secondary);
        font-weight: 500;
        font-size: var(--text-base-size);
        padding: var(--gap-sm) var(--gap-md);
        border-radius: var(--radius-sm);
        position: relative;
        transition: color var(--transition-fast), background-color var(--transition-fast);
    }
    .nav-link::after {
        content: ''; position: absolute; width: 0; height: 2px;
        bottom: 4px; left: 50%; transform: translateX(-50%);
        background-color: var(--accent-primary);
        transition: width var(--transition-std);
    }
    .nav-link:hover, .nav-link:focus-visible { color: var(--accent-primary); }
    .nav-link:hover::after, .nav-link:focus-visible::after, .nav-link.active::after { width: 60%; }
    .nav-link.active { color: var(--accent-primary); font-weight: 600; }
    .nav-link:focus-visible { outline: none; background-color: rgba(var(--accent-primary-rgb), 0.1); }
}

.theme-toggle-btn {
    background: transparent; border: 1px solid var(--border-primary);
    color: var(--text-secondary); width: 38px; height: 38px;
    border-radius: var(--radius-circle); display: flex; justify-content: center; align-items: center;
    font-size: 1rem; transition: all var(--transition-fast);
}
.theme-toggle-btn:hover, .theme-toggle-btn:focus-visible {
    background-color: rgba(var(--accent-primary-rgb), 0.1);
    color: var(--accent-primary); border-color: var(--accent-primary);
    transform: scale(1.1); outline: none;
}
.theme-toggle-btn .fa-sun { display: none; }
.light-theme .theme-toggle-btn .fa-sun { display: inline-block; }
.light-theme .theme-toggle-btn .fa-moon { display: none; }

.burger { display: flex; flex-direction: column; justify-content: space-around; width: 28px; height: 22px; z-index: 1100; margin-left: var(--gap-sm); }
@media (min-width: 881px) { .burger { display: none; } }
.burger .burger-line {
    display: block; width: 100%; height: 3px; background: var(--text-primary);
    border-radius: var(--radius-pill); transition: all 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}
.burger[aria-expanded="true"] .burger-line:nth-child(1) { transform: translateY(9.5px) rotate(45deg); }
.burger[aria-expanded="true"] .burger-line:nth-child(2) { opacity: 0; transform: scaleX(0); }
.burger[aria-expanded="true"] .burger-line:nth-child(3) { transform: translateY(-9.5px) rotate(-45deg); }
.burger:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 4px; border-radius: var(--radius-sm); }

ul.nav-links-mobile {
    position: fixed; top: 0; right: -100%; width: min(75vw, 280px); height: 100vh;
    background: var(--bg-dark-primary); display: flex; flex-direction: column;
    align-items: center; justify-content: center; padding: var(--gap-xl); gap: var(--gap-md);
    transition: right 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: -5px 0 15px rgba(0,0,0,0.1); z-index: 999; overflow-y: auto;
    border-left: 1px solid var(--border-primary);
}
ul.nav-links-mobile.nav-active { right: 0; }
ul.nav-links-mobile li { width: 100%; text-align: center; }
ul.nav-links-mobile .nav-link {
    font-size: var(--text-lg); padding: var(--gap-md) var(--gap-lg); display: block;
    color: var(--text-secondary); border-radius: var(--radius-md);
}
ul.nav-links-mobile .nav-link:hover, ul.nav-links-mobile .nav-link:focus-visible {
    background-color: rgba(var(--accent-primary-rgb), 0.1); color: var(--accent-primary);
}
ul.nav-links-mobile .nav-link.active { color: var(--accent-primary); background-color: rgba(var(--accent-primary-rgb), 0.15); font-weight: 600; }

.mobile-nav-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 998;
    opacity: 0; transition: opacity var(--transition-std), backdrop-filter var(--transition-std);
    pointer-events: none; backdrop-filter: blur(0px); -webkit-backdrop-filter: blur(0px);
}
.mobile-nav-overlay.visible { opacity: 1; pointer-events: auto; backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px); }

/* Hero Section */
.hero {
    min-height: 100vh; display: flex; align-items: center; overflow: hidden;
    position: relative;
    z-index: 1;
    text-align: center; padding-top: var(--nav-height);
}
@media (min-width: 768px) { .hero { text-align: left; } }
.hero-content {
    display: grid; grid-template-columns: 1fr; align-items: center;
    gap: var(--gap-lg); position: relative; z-index: 2;
}
@media (min-width: 768px) {
    .hero-content { grid-template-columns: minmax(0, 1.8fr) minmax(0, 1.2fr); gap: var(--gap-xl); }
    .intro { order: 1; }
    .profile-photo { order: 2; justify-self: end; margin: 0 auto; }
}
@media (min-width: 992px) { .hero-content { gap: var(--gap-xxl); } }

.intro h1 {
    font-size: clamp(2.5rem, 7vw, 4rem); line-height: 1.1;
    color: var(--text-headings); margin-bottom: var(--gap-sm);
}
.intro h1 span { color: var(--accent-primary); display: block; }
.typed-text-container {
    font-size: clamp(var(--text-md), 4vw, var(--text-lg));
    color: var(--text-secondary); min-height: 1.6em; margin-bottom: var(--gap-lg);
}
.typed-text { color: var(--text-primary); font-weight: 500; }
.typed-cursor { color: var(--accent-primary); font-weight: bold; animation: blink .8s infinite; }

.profile-photo {
    width: clamp(180px, 40vw, 280px); height: clamp(180px, 40vw, 280px);
    border-radius: var(--radius-circle); overflow: hidden;
    border: 5px solid var(--accent-primary);
    box-shadow: 0 0 25px -5px rgba(var(--accent-primary-rgb),0.4), var(--shadow-md);
    flex-shrink: 0; position: relative;
    transition: transform var(--transition-std), box-shadow var(--transition-std);
    margin: var(--gap-lg) auto 0;
}
@media (min-width: 768px) {
    .profile-photo { width: clamp(220px, 28vw, 320px); height: clamp(220px, 28vw, 320px); margin: 0; }
}
.profile-photo img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.profile-photo:hover { transform: scale(1.03) rotate(1deg); box-shadow: 0 0 35px 0px rgba(var(--accent-primary-rgb),0.5), var(--shadow-lg); }
.profile-photo:focus-visible { outline: 3px solid var(--accent-secondary); outline-offset: 4px; }

/* Buttons */
.btn {
    display: inline-block; padding: calc(var(--gap-md) * 0.9) calc(var(--gap-xl) * 0.9);
    border-radius: var(--radius-pill); font-weight: 600; font-size: var(--text-base-size);
    text-decoration: none; cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-std), background-color var(--transition-fast), color var(--transition-fast);
    text-align: center; border: 2px solid transparent;
}
.btn-primary {
    background-color: var(--accent-primary);
    color: var(--text-on-accent);
    box-shadow: 0 4px 15px -3px rgba(var(--accent-primary-rgb), 0.25);
}
.btn-primary:hover, .btn-primary:focus-visible {
    background-color: var(--accent-primary-darker);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 7px 20px -3px rgba(var(--accent-primary-rgb), 0.35);
}
.btn-secondary {
    background-color: transparent;
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}
.btn-secondary:hover, .btn-secondary:focus-visible {
    background-color: rgba(var(--accent-primary-rgb), 0.1);
    color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 3px 10px -2px rgba(var(--accent-primary-rgb), 0.15);
}
.btn:active { transform: scale(0.98) translateY(0); }
.btn:focus-visible { outline: none; }
.btn-primary:focus-visible { box-shadow: 0 0 0 3px var(--bg-dark-primary), 0 0 0 5px var(--accent-primary); }
.light-theme .btn-primary:focus-visible { box-shadow: 0 0 0 3px var(--bg-dark-secondary), 0 0 0 5px var(--accent-primary); }
.btn-secondary:focus-visible { box-shadow: 0 0 0 2px var(--bg-dark-primary), 0 0 0 4px var(--accent-primary); }
.light-theme .btn-secondary:focus-visible { box-shadow: 0 0 0 2px var(--bg-dark-secondary), 0 0 0 4px var(--accent-primary); }

/* Section Styles */
.section {
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.section-title {
    text-align: center; position: relative; padding-bottom: var(--gap-md);
}
.section-title::after {
    content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
    width: 70px; height: 4px;
    background-color: var(--accent-primary);
    border-radius: var(--radius-pill);
}

/* About Section */
.about-content-grid { display: grid; grid-template-columns: 1fr; gap: var(--gap-lg); align-items: flex-start; }
@media (min-width: 992px) { .about-content-grid { grid-template-columns: 2fr 1fr; gap: var(--gap-xl); } }
.academic-details { padding: var(--gap-lg); }
.academic-details ul { list-style: none; }
.academic-details li { margin-bottom: var(--gap-sm); color: var(--text-secondary); font-size: var(--text-sm); }
.academic-details li strong { color: var(--text-primary); font-weight: 500; margin-right: var(--gap-xs); display: inline-block; min-width: 70px; }
.academic-details a { font-weight: 500; }

/* Skills Section */
.skills-category { margin-bottom: var(--gap-xxl); }
.skills-category:last-of-type { margin-bottom: 0; }

.technical-skills-layout { display: flex; justify-content: center; align-items: center; margin-top: var(--gap-xl); padding: 0 var(--gap-sm); }
.skills-grid-main {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: var(--gap-md); /* Slightly reduced gap for smaller feel */
    max-width: 680px; /* Reduced max-width for desktop */
    width: 100%;
}
.skill-card-main {
    padding: var(--gap-md); display: flex; flex-direction: column;
    align-items: center; justify-content: center; text-align: center;
    min-height: 130px; /* Adjusted min-height */
    aspect-ratio: 1 / 0.9; /* Adjusted aspect ratio */
    cursor: pointer;
    border-width: 1px;
    box-shadow: 0 3px 5px rgba(0,0,0,0.05);
}
.skill-card-main:hover, .skill-card-main:focus-visible {
    border-color: var(--skill-card-hover-border);
    background-color: var(--skill-card-hover-bg);
    transform: translateY(-6px) scale(1.03);
    box-shadow: 0 8px 15px rgba(var(--accent-primary-rgb),0.1), 0 3px 6px rgba(0,0,0,0.07);
}
.skill-icon-main {
    width: clamp(38px, 6.5vw, 48px); /* Slightly adjusted icon size */
    height: clamp(38px, 6.5vw, 48px);
    object-fit: contain; margin-bottom: var(--gap-sm); /* Reduced margin */
    filter: var(--skill-icon-filter);
    transition: transform var(--transition-fast);
}
.skill-card-main:hover .skill-icon-main {
    transform: scale(1.1);
}
.skill-name-text-main {
    font-size: calc(var(--text-sm) * 0.95); /* Slightly smaller text */
    font-weight: 600;
    color: var(--text-primary);
    margin: 0; line-height: 1.3; transition: color var(--transition-fast);
}
.skill-card-main:hover .skill-name-text-main,
.skill-card-main:focus-visible .skill-name-text-main { color: var(--accent-primary); }

.skills-center-display {
    background-color: var(--skill-center-display-bg);
    border: 2px solid var(--skill-center-display-border);
    border-radius: var(--radius-circle);
    width: var(--skill-center-display-size); height: var(--skill-center-display-size);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    text-align: center; padding: var(--gap-sm);
    grid-column: 2 / 3; grid-row: 2 / 3;
    align-self: center; justify-self: center;
    box-shadow: 0 0 25px -5px rgba(var(--accent-primary-rgb), 0.35);
    transition: opacity 0.15s ease-in-out, transform 0.2s ease-out, box-shadow var(--transition-std);
}
.skills-center-display:hover {
    transform: scale(1.03);
    box-shadow: 0 0 30px rgba(var(--accent-primary-rgb), 0.4);
}
.skills-center-display.fade-out { opacity: 0; transform: scale(0.95); }

#center-skill-name {
    font-size: clamp(var(--text-base-size), 2vw, var(--text-lg)); /* Adjusted */
    font-weight: 700; color: var(--text-headings); text-transform: uppercase;
    letter-spacing: 0.8px; margin-bottom: var(--gap-xs);
}
#center-skill-score {
    font-size: clamp(var(--text-sm), 1.6vw, var(--text-base-size)); /* Adjusted */
    color: var(--accent-primary); font-weight: 500;
}

@media (max-width: 768px) { /* Tablet view for skills */
    .skills-grid-main {
        grid-template-columns: repeat(2, 1fr);
        max-width: 480px; /* Further reduce for tablet if needed */
        gap: var(--gap-md);
    }
    .skills-grid-main > .skills-center-display {
        grid-column: 1 / -1; grid-row: 3 / 4;
        width: clamp(120px, 25vw, 150px); height: clamp(120px, 25vw, 150px);
        margin-top: var(--gap-lg);
    }
    .skill-card-main { min-height: 110px; aspect-ratio: 1 / 0.85; }
}
@media (max-width: 480px) { /* Mobile view for skills */
    .skills-grid-main {
        gap: var(--gap-sm);
        max-width: 100%; /* Allow full width for 2 columns */
    }
    .skill-card-main { padding: var(--gap-sm); min-height: 100px; aspect-ratio: 1 / 0.8; }
    .technical-skills-layout { padding: 0; }
}

.skills-grid, .profiles-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--gap-md); margin-top: var(--gap-lg);
}
.skill-card, .profile-card {
    padding: var(--gap-lg) var(--gap-md); text-align: center;
    text-decoration: none; color: inherit;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    min-height: 120px;
}
.skill-icon { width: 44px; height: 44px; margin-bottom: var(--gap-sm); object-fit: contain; }
.profile-icon { font-size: 2.2rem; color: var(--accent-primary); margin-bottom: var(--gap-sm); transition: transform var(--transition-fast); }
.skill-card p, .profile-card span { color: var(--text-primary); font-weight: 500; font-size: var(--text-sm); line-height: 1.3; margin: 0; }
.profile-card:hover .profile-icon { transform: scale(1.1); }

/* Experience Section - Timeline */
.timeline { position: relative; padding-left: var(--gap-xl); margin-top: var(--gap-xl); }
.timeline::before {
    content: ''; position: absolute; top: 10px; left: calc(var(--gap-sm) + 1px); bottom: 10px; width: 3px;
    background: linear-gradient(to bottom, transparent, var(--timeline-line-color) 20%, var(--timeline-line-color) 80%, transparent);
    border-radius: var(--radius-pill); z-index: 0;
}
.timeline-item { margin-bottom: var(--gap-xl); position: relative; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-item-content {
    padding: var(--gap-lg); border-left-width: 4px; border-left-color: transparent;
    position: relative; z-index: 1;
}
.timeline-item-content::before {
    content: ''; position: absolute; top: calc(var(--gap-lg) + 0.4rem);
    left: calc(-1 * var(--gap-xl) + var(--gap-sm));
    width: 14px; height: 14px; border-radius: var(--radius-circle);
    background-color: var(--timeline-dot-color);
    border: 3px solid var(--bg-dark-primary);
    z-index: 2; transition: transform var(--transition-fast), background-color var(--transition-fast);
}
.timeline-item-content:hover { border-left-color: var(--accent-primary); transform: translateX(5px) translateY(-3px); }
.timeline-item-content:hover::before { transform: scale(1.15); }
.timeline-date { color: var(--text-secondary); font-size: var(--text-sm); font-style: italic; margin-bottom: var(--gap-xs); display: block; }
.timeline-details { list-style: none; padding-left: 0; margin-top: var(--gap-sm); }
.timeline-details li {
    color: var(--text-primary); margin-bottom: var(--gap-xs); font-size: var(--text-base-size);
    position: relative; padding-left: 1.75rem; line-height: 1.5;
}
.timeline-details li::before {
    content: '▹'; position: absolute; left: 0.5rem; top: 1px; color: var(--accent-primary);
    font-size: 1.1em; line-height: inherit; transition: transform var(--transition-fast);
}
.timeline-item-content:hover .timeline-details li::before { transform: translateX(3px); }

/* Mobile improvements for Professional Journey */
@media (max-width: 767px) {
    .timeline { padding-left: var(--gap-lg); } /* Reduce left padding */
    .timeline-item-content { padding: var(--gap-md); } /* Reduce padding inside cards */
    .timeline-item-content::before {
        top: calc(var(--gap-md) + 0.3rem); /* Adjust dot position */
        left: calc(-1 * var(--gap-lg) + var(--gap-xs) + 1px);
        width: 12px; height: 12px;
    }
    h3.timeline-title { font-size: calc(var(--text-lg) * 0.9); } /* Smaller title */
    .timeline-date { font-size: calc(var(--text-sm) * 0.9); } /* Smaller date */
    .timeline-details li {
        font-size: calc(var(--text-base-size) * 0.9); /* Smaller list item text */
        padding-left: 1.5rem; /* Adjust padding for smaller text */
        margin-bottom: var(--gap-xs);
    }
    .timeline-details li::before { left: 0.3rem; }
}


/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
    gap: var(--gap-lg); margin-top: var(--gap-xl);
}
@media (max-width: 767px) and (min-width: 481px) { /* Tablet: 2 projects per row */
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--gap-md);
    }
}
@media (max-width: 480px) { /* Mobile: 1 project per row (default behavior of auto-fit) */
    .projects-grid {
        grid-template-columns: 1fr; /* Explicitly 1 column for small mobile */
        gap: var(--gap-md);
    }
}

.project-item { display: flex; flex-direction: column; overflow: hidden; }
.project-card-link { display: flex; flex-direction: column; height: 100%; text-decoration: none; color: inherit; }
.project-image-container {
    height: 180px; overflow: hidden; position: relative;
    background-color: var(--bg-dark-tertiary); border-bottom: 1px solid var(--border-secondary);
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.project-image {
    display: block; max-width: 100%; max-height: 100%; width: auto; height: auto;
    object-fit: cover; transition: transform var(--transition-slow), filter var(--transition-std);
    filter: saturate(0.9) brightness(0.95);
}
.light-theme .project-image { filter: saturate(1) brightness(1); }
.project-item:hover .project-image { transform: scale(1.05); filter: saturate(1) brightness(1); }
.project-card-content { padding: var(--gap-lg); flex-grow: 1; display: flex; flex-direction: column; }
.project-description { margin-bottom: var(--gap-md); font-size: var(--text-sm); color: var(--text-secondary); line-height: 1.6; }
.project-footer {
    margin-top: auto; padding-top: var(--gap-md);
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: nowrap;
    gap: var(--gap-md);
}
.tech-used {
    font-size: calc(var(--text-sm) * 0.9); color: var(--tech-tag-color);
    background-color: var(--tech-tag-bg);
    border: 1px solid var(--tech-tag-border);
    padding: 0.4em 0.8em;
    border-radius: var(--radius-md);
    font-weight: 500;
    letter-spacing: 0.3px; margin: 0;
    white-space: normal;
    text-align: left;
    line-height: 1.4;
}
.tech-used strong { color: inherit; font-weight: 600; }

.github-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--gap-xs);
    padding: var(--gap-sm) var(--gap-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    background-color: var(--bg-dark-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
    flex-shrink: 0;
}
.light-theme .github-button {
    background-color: #f3f4f6;
}
.github-button i { font-size: 1.1em; }
.github-button:hover, .github-button:focus-visible {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background-color: rgba(var(--accent-primary-rgb), 0.1);
    transform: translateY(-1px) scale(1.02);
    box-shadow: 0 2px 8px rgba(var(--accent-primary-rgb), 0.15);
    outline: none;
}


/* Certificates / CTA Section */
.cta-section { background-color: var(--bg-dark-secondary); border-radius: var(--radius-xl); }
.light-theme .cta-section { background-color: var(--bg-dark-tertiary); }
.cta-text { font-size: var(--text-lg); color: var(--text-secondary); margin-bottom: var(--gap-lg); max-width: 50ch; margin-left: auto; margin-right: auto; }

/* Contact Section */
.contact-container { max-width: 700px; margin-left: auto; margin-right: auto; text-align: center; }
.contact-intro { margin-bottom: var(--gap-xl); font-size: var(--text-base-size); color: var(--text-secondary); }
#contactForm { text-align: left; }
.form-group { position: relative; margin-bottom: var(--gap-lg); }
.form-group label {
    position: absolute; top: 0.9rem; left: 0.9rem; font-size: var(--text-base-size);
    color: var(--text-secondary); background-color: var(--form-input-bg);
    padding: 0 var(--gap-xs); transition: all .18s ease; pointer-events: none; z-index: 1;
}
.form-group input, .form-group textarea {
    width: 100%; padding: 1.5rem .9rem .5rem; border-radius: var(--radius-md);
    border: 1.5px solid var(--form-input-border); background: var(--form-input-bg);
    color: var(--text-primary); transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    font-size: var(--text-base-size); position: relative; z-index: 0;
}
.form-group input:focus + label, .form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label, .form-group textarea:not(:placeholder-shown) + label {
    top: -0.5rem; left: 0.7rem; font-size: calc(var(--text-sm) * 0.9);
    color: var(--accent-primary); background-color: var(--form-input-label-bg-active);
    padding: 0 var(--gap-xs); z-index: 2;
}
.form-group textarea { min-height: 140px; resize: vertical; line-height: 1.6; }
.form-group input:focus, .form-group textarea:focus {
    outline: none; border-color: var(--form-input-focus-border);
    box-shadow: 0 0 0 3px rgba(var(--accent-primary-rgb), .15);
}
.form-group input:invalid, .form-group textarea:invalid {
    border-color: var(--accent-danger);
    box-shadow: 0 0 0 3px rgba(244, 63, 94, .15);
}
.btn-submit { width: 100%; margin-top: var(--gap-sm); padding: calc(var(--gap-md) * 0.95) var(--gap-xl); font-size: var(--text-lg); }
.btn-submit:disabled { opacity: .65; cursor: not-allowed; background: var(--bg-dark-tertiary); box-shadow: none; }

.form-status-container { margin-top: var(--gap-lg); }
.form-message {
    padding: var(--gap-md) var(--gap-lg); border-radius: var(--radius-md);
    text-align: left; font-weight: 500; border: 1px solid;
    animation: fadeIn .4s ease-out; display: flex; align-items: center; gap: var(--gap-sm);
}
.form-message i { font-size: 1.2em; }
.form-message.success {
    background: rgba(var(--accent-primary-rgb), .08); border-color: rgba(var(--accent-primary-rgb), .3);
    color: var(--accent-primary);
}
.form-message.error {
    background: rgba(244, 63, 94, .08); border-color: rgba(244, 63, 94, .3);
    color: var(--accent-danger);
}

/* Footer */
#footer {
    position: relative;
    z-index: 1;
    padding: var(--gap-xl) var(--gap-md); background: var(--bg-dark-primary);
    text-align: center; margin-top: var(--gap-xxl);
    border-top: 1px solid var(--border-primary);
}
.footer-container { display: flex; flex-direction: column; align-items: center; gap: var(--gap-md); }
.social-icons { display: flex; gap: var(--gap-lg); }
.social-icons a {
    color: var(--text-secondary); font-size: 1.6rem;
    transition: color var(--transition-fast), transform var(--transition-fast);
}
.social-icons a:hover, .social-icons a:focus-visible { color: var(--accent-primary); transform: scale(1.15) translateY(-2px); outline: none; }
.copyright-text { color: var(--text-secondary); font-size: var(--text-sm); margin: 0; }
.copyright-text .fa-heart { animation: pulse 1.5s infinite ease-in-out; display: inline-block; }

/* Scroll to Top Button */
.scroll-top {
    position: fixed; bottom: 1.5rem; right: 1.5rem;
    width: 44px; height: 44px; background: var(--accent-primary); color: var(--text-on-accent);
    border: none; border-radius: var(--radius-circle);
    display: flex; justify-content: center; align-items: center; font-size: 1.2rem;
    box-shadow: 0 5px 15px -3px rgba(var(--accent-primary-rgb), 0.3);
    cursor: pointer; opacity: 0; visibility: hidden;
    transform: scale(.8) translateY(20px);
    transition: all var(--transition-std); z-index: 500;
}
.light-theme .scroll-top { color: var(--text-on-accent); }
.scroll-top.show { opacity: 1; visibility: visible; transform: scale(1) translateY(0); }
.scroll-top:hover, .scroll-top:focus-visible {
    background-color: var(--accent-primary-darker); transform: scale(1.05) translateY(-3px);
    box-shadow: 0 8px 20px -3px rgba(var(--accent-primary-rgb), 0.4); outline: none;
}
.scroll-top:active { transform: scale(.95); }