/* ============================================
   OLUWOLE FASAKIN PORTFOLIO - STYLES
   Version: 2.0
   Last Updated: 2026-01-04
   ============================================ */

/* 1. CSS VARIABLES & THEME SETUP */
:root {
    /* Default: Dark Mode */
    --primary-accent: #007aff;
    --primary-dark: #1e1e1e;
    --secondary-dark: #2c2c2c;
    --text-light: #e0e0e0;
    --text-medium: #a0a0a0;
    --text-white: #ffffff;
    --border-color: #383838;
    --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.6);
    --shadow-card: 0 4px 15px rgba(0, 0, 0, 0.3);
    --shadow-card-hover: 0 8px 25px rgba(0, 0, 0, 0.5);
    --bg-color: #1e1e1e;
    --navbar-bg: rgba(30, 30, 30, 0.95);
    --tag-bg: #3a3a3a;
    --tag-border: #4a4a4a;
    --tag-text: var(--text-light);
    --btn-link-bg: #3a3a3a;
    --btn-link-text: var(--text-white);
    --transition-speed: 0.3s;
    --transition-medium: 0.4s;
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
}

body.light-mode {
    /* Light Mode */
    --primary-dark: #f4f5f7;
    --secondary-dark: #ffffff;
    --text-light: #5e6c84;
    --text-medium: #42526e;
    --text-white: #172b4d;
    --border-color: #dfe1e6;
    --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-card: 0 4px 15px rgba(0, 0, 0, 0.05);
    --shadow-card-hover: 0 8px 25px rgba(0, 0, 0, 0.1);
    --bg-color: #f4f5f7;
    --navbar-bg: rgba(255, 255, 255, 0.95);
    --tag-bg: #ebecf0;
    --tag-border: #dfe1e6;
    --tag-text: #172b4d;
    --btn-link-bg: #ebecf0;
    --btn-link-text: #172b4d;
}

/* 2. RESET & GLOBAL STYLES */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: 'Inter', 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-light);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    transition: background-color var(--transition-medium) var(--ease-smooth),
                color var(--transition-medium) var(--ease-smooth);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 6rem 0;
    position: relative;
    transition: background-color var(--transition-medium) var(--ease-smooth);
}

h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 700;
    color: var(--text-white);
    transition: color var(--transition-medium) var(--ease-smooth);
}

h1 {
    font-size: 3.8rem;
    margin-bottom: 1rem;
    font-weight: 800;
    letter-spacing: -0.05em;
}

h2 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.section-title {
    font-size: 2.8rem;
    text-align: center;
    margin-bottom: 4rem;
    color: var(--text-white);
    position: relative;
    padding-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 5px;
    background-color: var(--primary-accent);
    border-radius: 3px;
}

h3 {
    font-size: 1.75rem;
    color: var(--text-white);
    margin-bottom: 0.75rem;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-medium);
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.25rem;
    color: var(--text-light);
    transition: color var(--transition-medium) var(--ease-smooth);
}

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

a:hover {
    color: var(--primary-accent);
    text-decoration: underline;
    opacity: 0.85;
}

body.light-mode a:hover {
    color: #0056b3;
}

/* 3. BUTTONS */
.btn-primary {
    display: inline-block;
    background-color: var(--primary-accent);
    color: #ffffff;
    padding: 0.9rem 2.2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: background-color var(--transition-speed) var(--ease-smooth),
                transform var(--transition-speed) var(--ease-smooth),
                box-shadow var(--transition-speed) var(--ease-smooth);
    box-shadow: 0 4px 15px rgba(0, 122, 255, 0.3);
    font-size: 1.1rem;
}

.btn-primary:hover {
    background-color: #0066d6;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 122, 255, 0.4);
    text-decoration: none;
    color: #ffffff;
    opacity: 1;
}

.btn-secondary {
    display: inline-block;
    background: none;
    color: var(--primary-accent);
    border: 2px solid var(--primary-accent);
    padding: 0.9rem 2.2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: background-color var(--transition-speed) var(--ease-smooth),
                color var(--transition-speed) var(--ease-smooth),
                transform var(--transition-speed) var(--ease-smooth);
    font-size: 1.1rem;
    margin-left: 1rem;
}

.btn-secondary:hover {
    background-color: var(--primary-accent);
    color: #ffffff;
    transform: translateY(-3px);
    text-decoration: none;
    opacity: 1;
}

.social-links {
    display: flex;
    gap: 1.8rem;
    margin-top: 2rem;
}

.social-links a {
    color: var(--text-medium);
    font-size: 2rem;
    transition: color var(--transition-speed) var(--ease-smooth),
                transform var(--transition-speed) var(--ease-smooth);
}

.social-links a:hover {
    color: var(--primary-accent);
    transform: translateY(-5px);
    text-decoration: none;
    opacity: 1;
}

/* 4. NAVIGATION */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--navbar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth),
                box-shadow var(--transition-medium) var(--ease-smooth);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.nav-brand {
    font-family: 'Montserrat', sans-serif;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-white);
    text-decoration: none;
    letter-spacing: -0.03em;
    transition: color var(--transition-medium) var(--ease-smooth),
                opacity var(--transition-speed) var(--ease-smooth);
}

.nav-brand:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--text-light);
    text-decoration: none;
    padding: 0.5rem 0;
    position: relative;
    font-size: 1.05rem;
    transition: color var(--transition-speed) var(--ease-smooth);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--primary-accent);
    transition: width var(--transition-speed) var(--ease-smooth);
    border-radius: 1.5px;
}

.nav-link:hover {
    color: var(--primary-accent);
    text-decoration: none;
    opacity: 1;
}

.nav-link:hover::after,
.nav-link:focus::after {
    width: 100%;
}

.mobile-nav-toggle {
    display: none;
    font-size: 2rem;
    color: var(--text-white);
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
    transition: transform var(--transition-speed) var(--ease-smooth),
                color var(--transition-medium) var(--ease-smooth);
}

.mobile-nav-toggle:hover {
    transform: scale(1.1);
}

/* 4.1. Theme Toggle */
.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--text-medium);
    font-size: 1.3rem;
    cursor: pointer;
    transition: color var(--transition-speed) var(--ease-smooth),
                transform var(--transition-speed) var(--ease-smooth);
    padding: 0.5rem;
}

.theme-toggle-btn:hover {
    color: var(--primary-accent);
    transform: scale(1.1);
}

.theme-toggle-btn .fa-sun {
    display: none;
}

body.light-mode .theme-toggle-btn .fa-sun {
    display: inline-block;
}

body.light-mode .theme-toggle-btn .fa-moon {
    display: none;
}

/* 5. HERO SECTION */
#hero {
    padding-top: 120px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    text-align: left;
    background-color: var(--bg-color);
    position: relative;
    overflow: hidden;
}

.hero-layout {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.hero-left {
    flex: 2;
    max-width: 65%;
}

.hero-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    padding: 2.5rem;
    background-color: var(--secondary-dark);
    border-radius: 15px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    transform: perspective(1000px) rotateY(5deg) scale(0.98);
    transform-origin: left center;
    transition: transform 0.5s var(--ease-out-quint),
                background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth),
                box-shadow var(--transition-medium) var(--ease-smooth);
}

.hero-right:hover {
    transform: perspective(1000px) rotateY(0deg) scale(1.0);
    box-shadow: var(--shadow-card-hover);
}

.hero-headshot {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--primary-accent);
    box-shadow: 0 0 0 8px rgba(0, 122, 255, 0.2);
    margin-bottom: 1.5rem;
    transition: transform var(--transition-medium) var(--ease-out-quint),
                box-shadow var(--transition-medium) var(--ease-smooth);
}

.hero-right:hover .hero-headshot {
    transform: scale(1.05);
    box-shadow: 0 0 0 10px rgba(0, 122, 255, 0.3);
}

.hero-right h3 {
    font-size: 1.7rem;
    margin-bottom: 0.5rem;
    color: var(--text-white);
}

.hero-right p.title {
    font-size: 1.1rem;
    color: var(--primary-accent);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-right .location,
.hero-right .links {
    font-size: 0.95rem;
    color: var(--text-medium);
    margin-bottom: 0.5rem;
}

.hero-right .links a {
    margin: 0 0.5rem;
}

.hero-right .btn-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
    width: 100%;
}

.hero-right .btn-group .btn-primary,
.hero-right .btn-group .btn-secondary {
    width: 100%;
    margin-left: 0;
    text-align: center;
}

.hero-main-title {
    font-size: 4.5rem;
    color: var(--text-white);
    letter-spacing: -0.06em;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-tagline {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--primary-accent);
    margin-bottom: 2rem;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-light);
    max-width: 700px;
    margin-bottom: 3rem;
}

.outcome-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.outcome-card {
    background-color: var(--secondary-dark);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    text-align: center;
    transition: transform var(--transition-speed) var(--ease-smooth),
                box-shadow var(--transition-speed) var(--ease-smooth),
                background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth);
}

.outcome-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-card-hover);
}

.outcome-card .metric {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-accent);
    margin-bottom: 0.5rem;
    line-height: 1;
}

.outcome-card .description {
    font-size: 0.95rem;
    color: var(--text-medium);
    line-height: 1.4;
}

/* 6. ABOUT SECTION */
#about .container {
    max-width: 1000px;
    text-align: center;
}

#about .about-intro {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 4rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.about-focus-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    text-align: left;
}

.focus-card {
    background: var(--secondary-dark);
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-medium) var(--ease-smooth),
                box-shadow var(--transition-medium) var(--ease-smooth),
                background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth);
}

.focus-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.focus-card .icon {
    font-size: 2.5rem;
    color: var(--primary-accent);
    margin-bottom: 1.5rem;
    transition: transform var(--transition-speed) var(--ease-smooth);
}

.focus-card:hover .icon {
    transform: scale(1.1);
}

.focus-card h3 {
    font-size: 1.4rem;
    color: var(--text-white);
    margin-bottom: 0.75rem;
}

.focus-card p {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 0;
}

/* 7. EXPERTISE SECTION */
#expertise {
    background-color: var(--secondary-dark);
    transition: background-color var(--transition-medium) var(--ease-smooth);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.expertise-category {
    background: var(--primary-dark);
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-medium) var(--ease-smooth),
                box-shadow var(--transition-medium) var(--ease-smooth),
                background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth);
}

.expertise-category:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.expertise-category h3 {
    font-size: 1.5rem;
    color: var(--primary-accent);
    margin-bottom: 1.5rem;
    padding-bottom: 0.7rem;
    border-bottom: 3px solid var(--border-color);
    display: inline-block;
    letter-spacing: 0.02em;
    transition: border-color var(--transition-medium) var(--ease-smooth);
}

.expertise-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    list-style: none;
}

.expertise-tag {
    background-color: var(--tag-bg);
    color: var(--tag-text);
    padding: 0.6rem 1.2rem;
    border-radius: 25px;
    font-size: 0.95rem;
    font-weight: 500;
    border: 1px solid var(--tag-border);
    transition: background-color var(--transition-speed) var(--ease-smooth),
                color var(--transition-speed) var(--ease-smooth),
                border-color var(--transition-speed) var(--ease-smooth),
                transform var(--transition-speed) var(--ease-smooth);
}

.expertise-tag:hover {
    background-color: var(--primary-accent);
    color: #ffffff;
    border-color: var(--primary-accent);
    transform: translateY(-2px);
}

/* 8. PROJECTS SECTION */
.project-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.project-card-new {
    background: var(--secondary-dark);
    border-radius: 15px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-medium) var(--ease-smooth),
                box-shadow var(--transition-medium) var(--ease-smooth),
                background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.project-card-new:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-10px) scale(1.01);
}

.project-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    object-position: center;
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--transition-medium) var(--ease-smooth),
                transform var(--transition-medium) var(--ease-smooth);
}

.project-card-new:hover .project-image {
    transform: scale(1.02);
}

.project-content-new {
    padding: 2rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-content-new h3 {
    font-size: 1.5rem;
    color: var(--text-white);
    margin-bottom: 0.8rem;
}

.project-content-new h4 {
    font-size: 1.05rem;
    color: var(--primary-accent);
    margin-bottom: 1rem;
}

.project-content-new p {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.project-actions {
    margin-top: auto;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.project-actions .btn-link {
    background-color: var(--btn-link-bg);
    color: var(--btn-link-text);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background-color var(--transition-speed) var(--ease-smooth),
                transform var(--transition-speed) var(--ease-smooth),
                color var(--transition-speed) var(--ease-smooth);
}

.project-actions .btn-link:hover {
    background-color: var(--primary-accent);
    color: #ffffff;
    transform: translateY(-2px);
    text-decoration: none;
    opacity: 1;
}

/* 9. GITHUB SECTION */
#github {
    background-color: var(--primary-dark);
    transition: background-color var(--transition-medium) var(--ease-smooth);
}

.github-card {
    background-color: var(--secondary-dark);
    border-radius: 15px;
    padding: 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-medium) var(--ease-smooth),
                box-shadow var(--transition-medium) var(--ease-smooth),
                background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth);
}

.github-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.github-card-content h2 {
    margin-bottom: 1rem;
    font-size: 2.2rem;
    letter-spacing: -0.03em;
}

.github-card-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin-bottom: 0;
}

.github-card .btn-primary {
    flex-shrink: 0;
}

/* GitHub Activity Chart */
.github-activity-chart {
    flex-shrink: 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: border-color var(--transition-medium) var(--ease-smooth);
}

.github-activity-chart img {
    display: block;
    height: auto;
    max-width: 100%;
}

body.light-mode .github-activity-chart {
    border-color: #d0d7de;
}

/* 10. BRAND STRATEGY SECTION */
#brand-strategy {
    background-color: var(--primary-dark);
    transition: background-color var(--transition-medium) var(--ease-smooth);
    padding: 6rem 0;
    overflow: hidden;
}

.logo-carousel-container {
    width: 100%;
    overflow: hidden;
    position: relative;
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
    mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
}

.logo-carousel-track {
    display: flex;
    width: calc(200px * 12);
    animation: scroll 30s linear infinite;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(-200px * 6)); }
}

.brand-logo-card {
    width: 200px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 1.5rem;
    flex-shrink: 0;
}

.brand-logo-card a {
    display: block;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.6;
    filter: grayscale(100%);
    transition: opacity var(--transition-speed) var(--ease-smooth),
                filter var(--transition-speed) var(--ease-smooth),
                transform var(--transition-speed) var(--ease-smooth);
}

.brand-logo-card a:hover {
    opacity: 1;
    filter: grayscale(0%);
    transform: scale(1.1);
    text-decoration: none;
}

.brand-logo-card img {
    max-width: 130px;
    max-height: 50px;
    object-fit: contain;
}

.brand-logo-card .placeholder-logo {
    width: 130px;
    height: 50px;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-medium);
    text-align: center;
    line-height: 1.3;
    transition: border-color var(--transition-speed) var(--ease-smooth),
                color var(--transition-speed) var(--ease-smooth);
}

.brand-logo-card a:hover .placeholder-logo {
    border-color: var(--primary-accent);
    color: var(--primary-accent);
}

body.light-mode .brand-logo-card a {
    opacity: 0.8;
    filter: grayscale(80%);
}

body.light-mode .brand-logo-card a:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* 11. LANGUAGES SECTION */
#languages {
    background-color: var(--secondary-dark);
    transition: background-color var(--transition-medium) var(--ease-smooth);
}

.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.language-card {
    background: var(--primary-dark);
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform var(--transition-medium) var(--ease-smooth),
                box-shadow var(--transition-medium) var(--ease-smooth),
                background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth);
}

.language-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.language-card .flag-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.language-card h3 {
    font-size: 1.5rem;
    color: var(--text-white);
    margin-bottom: 1.5rem;
}

.language-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    justify-content: center;
}

.language-skill {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--tag-bg);
    color: var(--tag-text);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--tag-border);
    transition: background-color var(--transition-speed) var(--ease-smooth),
                border-color var(--transition-speed) var(--ease-smooth);
}

.language-skill i {
    color: var(--primary-accent);
}

.proficiency-bar {
    width: 100%;
    height: 6px;
    background-color: var(--border-color);
    border-radius: 3px;
    margin-top: 1rem;
    overflow: hidden;
}

.proficiency-fill {
    height: 100%;
    background-color: var(--primary-accent);
    border-radius: 3px;
    transition: width 1s var(--ease-out-quint);
}

/* 11.5. DEPLOYMENTS SECTION */
#deployments {
    background-color: var(--primary-dark);
    transition: background-color var(--transition-medium) var(--ease-smooth);
}

.deployments-intro {
    text-align: center;
    font-size: 1.15rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 3rem auto;
}

.deployments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.deployment-card {
    background: var(--secondary-dark);
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform var(--transition-medium) var(--ease-smooth),
                box-shadow var(--transition-medium) var(--ease-smooth),
                background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth);
}

.deployment-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.deployment-icon {
    font-size: 3rem;
    color: var(--primary-accent);
    margin-bottom: 1.5rem;
    transition: transform var(--transition-speed) var(--ease-smooth);
}

.deployment-card:hover .deployment-icon {
    transform: scale(1.1);
}

.deployment-card h3 {
    font-size: 1.5rem;
    color: var(--text-white);
    margin-bottom: 1rem;
}

.deployment-card p {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.deployment-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    justify-content: center;
}

.deployment-tag {
    background-color: var(--tag-bg);
    color: var(--tag-text);
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--tag-border);
    transition: background-color var(--transition-speed) var(--ease-smooth),
                color var(--transition-speed) var(--ease-smooth),
                border-color var(--transition-speed) var(--ease-smooth);
}

.deployment-card:hover .deployment-tag {
    background-color: rgba(0, 122, 255, 0.15);
    border-color: var(--primary-accent);
    color: var(--primary-accent);
}

/* 12. CLIENT WORK SECTION */
#client-work {
    background-color: var(--primary-dark);
    transition: background-color var(--transition-medium) var(--ease-smooth);
}

.client-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.client-card {
    background: var(--secondary-dark);
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-medium) var(--ease-smooth),
                box-shadow var(--transition-medium) var(--ease-smooth),
                background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth);
}

.client-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.client-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.client-logo {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background-color: var(--primary-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #fff;
    flex-shrink: 0;
    transition: transform var(--transition-speed) var(--ease-smooth);
}

.client-card:hover .client-logo {
    transform: scale(1.1);
}

.client-info h3 {
    font-size: 1.3rem;
    color: var(--text-white);
    margin-bottom: 0.3rem;
}

.client-info .location {
    font-size: 0.9rem;
    color: var(--text-medium);
    margin: 0;
}

.client-card p.description {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.deliverables-list {
    list-style: none;
    margin-bottom: 1.5rem;
}

.deliverables-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.5rem 0;
    color: var(--text-light);
    font-size: 0.95rem;
    transition: color var(--transition-speed) var(--ease-smooth);
}

.deliverables-list li:hover {
    color: var(--text-white);
}

.deliverables-list li i {
    color: var(--primary-accent);
    margin-top: 0.2rem;
}

.impact-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(0, 122, 255, 0.15);
    border: 1px solid var(--primary-accent);
    color: var(--primary-accent);
    padding: 0.6rem 1.2rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: background-color var(--transition-speed) var(--ease-smooth);
}

.impact-badge:hover {
    background-color: rgba(0, 122, 255, 0.25);
}

/* 13. THOUGHT LEADERSHIP */
.research-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.research-item-new {
    background: var(--secondary-dark);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-medium) var(--ease-smooth),
                box-shadow var(--transition-medium) var(--ease-smooth),
                background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth);
}

.research-item-new:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.research-item-new h3 {
    font-size: 1.4rem;
    margin-bottom: 0.6rem;
}

.research-item-new .journal {
    font-weight: 500;
    color: var(--text-medium);
    display: block;
    margin-bottom: 0.8rem;
    font-size: 0.95rem;
}

.research-item-new p {
    margin-bottom: 0;
    font-size: 1rem;
}

.research-item-new .doi-link {
    font-size: 0.9rem;
    color: var(--text-medium);
    margin-top: 1rem;
    display: inline-block;
    transition: color var(--transition-speed) var(--ease-smooth);
}

.research-item-new .doi-link:hover {
    color: var(--primary-accent);
}

/* 14. EDUCATION & AWARDS */
#education-awards {
    background-color: var(--secondary-dark);
    transition: background-color var(--transition-medium) var(--ease-smooth);
}

.education-grid-new {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.education-card-new {
    background: var(--primary-dark);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform var(--transition-medium) var(--ease-smooth),
                box-shadow var(--transition-medium) var(--ease-smooth),
                background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth);
}

.education-card-new:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.education-card-new .icon {
    font-size: 3rem;
    color: var(--primary-accent);
    margin-bottom: 1.5rem;
    transition: transform var(--transition-speed) var(--ease-smooth);
}

.education-card-new:hover .icon {
    transform: scale(1.1);
}

.education-card-new h3 {
    font-size: 1.3rem;
    color: var(--text-white);
    margin-bottom: 0.7rem;
}

.education-card-new p {
    color: var(--text-medium);
    font-size: 0.9rem;
    margin: 0;
    line-height: 1.5;
}

/* 15. CONTACT SECTION */
#contact {
    text-align: center;
}

#contact .container {
    max-width: 800px;
}

#contact p {
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
}

#contact .social-links {
    justify-content: center;
}

/* 16. FOOTER */
.footer {
    text-align: center;
    padding: 3rem 1.5rem;
    background-color: var(--primary-dark);
    border-top: 1px solid var(--border-color);
    color: var(--text-medium);
    font-size: 0.9rem;
    transition: background-color var(--transition-medium) var(--ease-smooth),
                border-color var(--transition-medium) var(--ease-smooth);
}

.footer p {
    color: var(--text-medium);
    margin: 0;
    transition: color var(--transition-medium) var(--ease-smooth);
}

.footer .social-links {
    margin-top: 1rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

/* 17. ANIMATIONS */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease-out-quint),
                transform 0.8s var(--ease-out-quint);
    will-change: opacity, transform;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation for grid items */
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0.1s; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 0.2s; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 0.3s; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 0.4s; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 0.5s; }
.reveal-stagger > .reveal:nth-child(6) { transition-delay: 0.6s; }

/* 18. RESPONSIVE */
@media (max-width: 992px) {
    .hero-layout {
        flex-direction: column;
        gap: 3rem;
    }
    .hero-left {
        max-width: 100%;
        text-align: center;
    }
    .hero-right {
        transform: none;
        width: 100%;
        max-width: 400px;
    }
    .hero-main-title {
        font-size: 3.5rem;
    }
    .hero-tagline {
        font-size: 1.3rem;
    }
    .outcome-cards {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
    .github-card {
        flex-direction: column;
        text-align: center;
    }
    .github-activity-chart {
        order: -1;
        margin-bottom: 2rem;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 3rem;
    }
    h2.section-title {
        font-size: 2.2rem;
    }
    h3 {
        font-size: 1.5rem;
    }
    h4 {
        font-size: 1.1rem;
    }

    .nav-container {
        height: 70px;
    }
    .nav-brand {
        font-size: 1.5rem;
    }
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--navbar-bg);
        backdrop-filter: blur(12px);
        flex-direction: column;
        align-items: center;
        padding-top: 4rem;
        gap: 3rem;
        transition: left 0.4s ease-in-out,
                    background-color var(--transition-medium) var(--ease-smooth);
    }

    .nav-menu.nav-open {
        left: 0;
    }

    .nav-link {
        font-size: 1.3rem;
        color: var(--text-white);
    }
    .nav-link::after {
        background-color: var(--primary-accent);
    }

    .mobile-nav-toggle {
        display: block;
    }

    #hero {
        padding-top: 100px;
        min-height: 80vh;
    }

    .hero-left {
        text-align: center;
    }

    .hero-main-title {
        font-size: 3rem;
        margin-bottom: 1rem;
    }
    .hero-tagline {
        font-size: 1.15rem;
    }
    .hero-description {
        font-size: 1rem;
        margin-bottom: 2rem;
    }

    .hero-right .btn-group {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    .hero-right .btn-group .btn-primary,
    .hero-right .btn-group .btn-secondary {
        width: auto;
        flex-grow: 1;
    }

    .btn-primary, .btn-secondary {
        padding: 0.8rem 1.8rem;
        font-size: 1rem;
    }
    .btn-secondary {
        margin-left: 0;
        margin-top: 1rem;
    }

    .outcome-cards {
        grid-template-columns: 1fr;
    }
    .outcome-card .metric {
        font-size: 2.2rem;
    }

    .github-card {
        padding: 2rem;
    }
    .github-card-content h2 {
        font-size: 1.8rem;
    }
    .github-card-content p {
        font-size: 1rem;
    }
    .about-focus-grid {
        grid-template-columns: 1fr;
    }
    .project-showcase {
        grid-template-columns: 1fr;
    }
    .client-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2.5rem;
    }
    h2.section-title {
        font-size: 1.8rem;
    }
    .hero-main-title {
        font-size: 2.5rem;
    }
    .hero-tagline {
        font-size: 1rem;
    }
    .hero-description {
        font-size: 0.9rem;
    }
    .hero-right .btn-group {
        flex-direction: column;
    }
    .btn-secondary {
        margin-top: 0;
    }
    .project-showcase {
        grid-template-columns: 1fr;
    }
    .github-card {
        padding: 1.5rem;
    }
}