/* ========================================
   CLEAN, WHITE, PROFESSIONAL PORTFOLIO
   Light & Dark Mode Support
   ======================================== */

:root {
    --white: #ffffff;
    --off-white: #fafafa;
    --gray-50: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #868e96;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --black: #111111;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 10px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.08);
    --transition: 0.25s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font);
    color: var(--gray-800);
    background: var(--white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s ease, color 0.3s ease;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* CONTAINER */
.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* SECTIONS */
.section {
    padding: 80px 0;
}

.section-gray {
    background: var(--gray-50);
}

.section-label {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--gray-500);
    margin-bottom: 0.75rem;
}

.section-heading {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--black);
    margin-bottom: 0.75rem;
    letter-spacing: -0.5px;
}

.section-desc {
    color: var(--gray-600);
    font-size: 1.05rem;
    max-width: 500px;
    margin-bottom: 2.5rem;
}

/* ========================================
   NAVIGATION
   ======================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition);
}

.nav.scrolled {
    box-shadow: 0 1px 12px rgba(0,0,0,0.06);
}

.nav-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--black);
    letter-spacing: -0.5px;
}

.nav-logo span {
    color: var(--gray-400);
}

.nav-links {
    display: flex;
    gap: 0.25rem;
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
    padding: 0.4rem 0.85rem;
    border-radius: 6px;
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--black);
    background: var(--gray-100);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-cta {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--white);
    background: var(--black);
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    transition: var(--transition);
}

.nav-cta:hover {
    background: var(--gray-800);
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
}

.nav-toggle:hover {
    background: var(--gray-200);
}

.nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 1px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* ========================================
   HERO
   ======================================== */

.hero {
    padding: 140px 0 80px;
    background: var(--white);
}

.hero-content {
    max-width: 640px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #16a34a;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    padding: 0.35rem 1rem;
    border-radius: 100px;
    margin-bottom: 1.5rem;
}

.hero-badge::before {
    content: '';
    width: 7px;
    height: 7px;
    background: #16a34a;
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    color: var(--gray-800);
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 0.25rem;
}

.hero-name {
    color: var(--black);
}

.hero-role {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-500);
    margin-bottom: 1.25rem;
    letter-spacing: -0.3px;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.hero-social {
    display: flex;
    gap: 0.5rem;
}

.hero-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    color: var(--gray-600);
    font-size: 1.1rem;
    transition: var(--transition);
}

.hero-social a:hover {
    border-color: var(--gray-800);
    color: var(--black);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.7rem 1.5rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-dark {
    background: var(--black);
    color: var(--white);
}

.btn-dark:hover {
    background: var(--gray-800);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-outline {
    background: transparent;
    color: var(--gray-800);
    border: 1.5px solid var(--gray-300);
}

.btn-outline:hover {
    border-color: var(--gray-800);
    transform: translateY(-1px);
}

.btn-sm {
    font-size: 0.85rem;
    padding: 0.55rem 1.15rem;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* ========================================
   ABOUT
   ======================================== */

.about-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--black);
    margin-bottom: 1.25rem;
    line-height: 1.35;
    letter-spacing: -0.5px;
}

.about-text p {
    color: var(--gray-600);
    margin-bottom: 1rem;
    font-size: 0.98rem;
}

.about-text strong {
    color: var(--gray-800);
    font-weight: 600;
}

.about-details {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
}

.detail-item {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.detail-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.detail-item:first-child {
    padding-top: 0;
}

.detail-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--gray-500);
}

.detail-value {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-800);
}

.detail-value a {
    color: var(--gray-800);
    border-bottom: 1px solid var(--gray-300);
    transition: var(--transition);
}

.detail-value a:hover {
    color: var(--black);
    border-color: var(--black);
}

/* ========================================
   SKILLS
   ======================================== */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-top: 2.5rem;
}

.skill-item {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    transition: var(--transition);
}

.skill-item:hover {
    border-color: var(--gray-300);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border-radius: 12px;
    margin-bottom: 1.25rem;
    font-size: 1.3rem;
    color: var(--gray-700);
    transition: var(--transition);
}

.skill-item:hover .skill-icon {
    background: var(--black);
    color: var(--white);
}

.skill-item h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 0.5rem;
}

.skill-item p {
    font-size: 0.85rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ========================================
   PROJECTS
   ======================================== */

.project-featured {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    margin-top: 2.5rem;
    transition: var(--transition);
}

.project-featured:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

.project-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--gray-500);
    background: var(--white);
    border: 1px solid var(--gray-200);
    padding: 0.3rem 0.75rem;
    border-radius: 5px;
    margin-bottom: 1.25rem;
}

.project-content h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--black);
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

.project-content p {
    color: var(--gray-600);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 1.25rem;
    max-width: 680px;
}

.project-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1.5rem;
}

.project-stack span {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-600);
    background: var(--white);
    border: 1px solid var(--gray-200);
    padding: 0.3rem 0.7rem;
    border-radius: 5px;
}

.project-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.projects-small {
    margin-top: 1.5rem;
}

.placeholder-card {
    border: 2px dashed var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
    color: var(--gray-400);
}

.placeholder-icon {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    opacity: 0.5;
}

.placeholder-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-500);
    margin-bottom: 0.25rem;
}

.placeholder-card p {
    font-size: 0.85rem;
    color: var(--gray-400);
}

/* ========================================
   CERTIFICATES
   ======================================== */

.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-top: 2.5rem;
}

.cert-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.cert-clickable {
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.cert-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

.cert-preview {
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    position: relative;
    overflow: hidden;
}

.cert-preview.hackerrank-bg { background: #edfcf2; }
.cert-preview.oracle-bg { background: #fef2f0; }
.cert-preview.hplife-bg { background: #eff6ff; }
.cert-preview.nullclass-bg { background: #f5f3ff; }

body.dark-mode .cert-preview { background: #1a1a1a; }
body.dark-mode .cert-preview.hackerrank-bg { background: #0a2616; }
body.dark-mode .cert-preview.oracle-bg { background: #2a1510; }
body.dark-mode .cert-preview.hplife-bg { background: #0a1628; }
body.dark-mode .cert-preview.nullclass-bg { background: #1a1028; }

.cert-file-icon {
    font-size: 2.5rem;
    color: #e74c3c;
    opacity: 0.7;
    transition: var(--transition);
}

.cert-card:hover .cert-file-icon {
    opacity: 1;
    transform: scale(1.1);
}

.cert-img {
    max-width: 85%;
    max-height: 120px;
    object-fit: contain;
    transition: var(--transition);
}

.cert-card:hover .cert-img {
    transform: scale(1.05);
}

.cert-body {
    padding: 1.25rem;
    text-align: center;
}

.cert-body h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 0.2rem;
}

.cert-org {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-500);
    margin-bottom: 0.75rem;
}

.cert-view {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-400);
    transition: var(--transition);
}

.cert-card:hover .cert-view {
    color: var(--black);
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.85);
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.lightbox.active {
    display: flex;
}

.lightbox-img {
    max-width: 90%;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.lightbox-close {
    position: absolute;
    top: 1.5rem;
    right: 2rem;
    font-size: 2.5rem;
    color: #ffffff;
    background: none;
    border: none;
    cursor: pointer;
    line-height: 1;
    transition: var(--transition);
}

.lightbox-close:hover {
    transform: scale(1.2);
    color: #e74c3c;
}


/* ========================================
   EDUCATION
   ======================================== */

.edu-card {
    display: flex;
    gap: 1.75rem;
    align-items: flex-start;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 2.25rem;
    margin-top: 2.5rem;
    transition: var(--transition);
}

.edu-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

.edu-icon {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--black);
    color: var(--white);
    border-radius: 12px;
    font-size: 1.2rem;
}

.edu-status {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: #16a34a;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    padding: 0.25rem 0.65rem;
    border-radius: 5px;
    margin-bottom: 0.75rem;
}

.edu-info h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 0.35rem;
}

.edu-college {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.15rem;
}

.edu-uni {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 0.5rem;
}

.edu-year {
    font-size: 0.85rem;
    color: var(--gray-500);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* ========================================
   CONTACT
   ======================================== */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 2.5rem;
    align-items: start;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    transition: var(--transition);
}

.contact-item:hover {
    border-color: var(--gray-300);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.contact-item i {
    font-size: 1.1rem;
    color: var(--gray-500);
    width: 20px;
    text-align: center;
}

.contact-item strong {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--gray-800);
}

.contact-item span {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* FORM */
.contact-form {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.7rem 0.9rem;
    font-family: var(--font);
    font-size: 0.9rem;
    color: var(--gray-800);
    background: var(--gray-50);
    border: 1.5px solid var(--gray-200);
    border-radius: 8px;
    outline: none;
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-400);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--gray-800);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(0,0,0,0.04);
}

.form-group textarea {
    resize: vertical;
    min-height: 110px;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--gray-200);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-inner p {
    font-size: 0.85rem;
    color: var(--gray-500);
}

.footer-links {
    display: flex;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--gray-400);
    font-size: 1rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--black);
}

/* ========================================
   BACK TO TOP
   ======================================== */

.to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 42px;
    height: 42px;
    background: var(--black);
    color: var(--white);
    border: none;
    border-radius: 10px;
    font-size: 0.9rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    box-shadow: var(--shadow);
    z-index: 999;
}

.to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   SCROLL REVEAL
   ======================================== */

.reveal-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ========================================
   THEME TOGGLE BUTTON
   ======================================== */

.theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    color: var(--gray-600);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--gray-200);
    color: var(--black);
    transform: rotate(15deg);
}

/* ========================================
   DARK MODE THEME
   ======================================== */

body.dark-mode {
    --white: #111111;
    --off-white: #161616;
    --gray-50: #1a1a1a;
    --gray-100: #222222;
    --gray-200: #2a2a2a;
    --gray-300: #3a3a3a;
    --gray-400: #555555;
    --gray-500: #888888;
    --gray-600: #aaaaaa;
    --gray-700: #cccccc;
    --gray-800: #e0e0e0;
    --gray-900: #f0f0f0;
    --black: #ffffff;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
    --shadow: 0 4px 20px rgba(0,0,0,0.25);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.3);
}

body.dark-mode .nav {
    background: rgba(17, 17, 17, 0.9);
}

body.dark-mode .nav.scrolled {
    box-shadow: 0 1px 12px rgba(0,0,0,0.3);
}

body.dark-mode .hero-badge {
    background: #0a2616;
    border-color: #16553a;
    color: #4ade80;
}

body.dark-mode .hero-badge::before {
    background: #4ade80;
}

body.dark-mode .nav-cta {
    background: #ffffff;
    color: #111111;
}

body.dark-mode .nav-cta:hover {
    background: #e0e0e0;
}

body.dark-mode .btn-dark {
    background: #ffffff;
    color: #111111;
}

body.dark-mode .btn-dark:hover {
    background: #e0e0e0;
}

body.dark-mode .btn-outline {
    border-color: #3a3a3a;
    color: #e0e0e0;
}

body.dark-mode .btn-outline:hover {
    border-color: #ffffff;
}

body.dark-mode .theme-toggle {
    background: #222222;
    border-color: #3a3a3a;
    color: #f0c040;
}

body.dark-mode .theme-toggle:hover {
    background: #2a2a2a;
    color: #ffd700;
}

body.dark-mode .skill-item:hover .skill-icon {
    background: #ffffff;
    color: #111111;
}

body.dark-mode .edu-icon {
    background: #ffffff;
    color: #111111;
}

body.dark-mode .edu-status {
    background: #0a2616;
    border-color: #16553a;
    color: #4ade80;
}

body.dark-mode .nav-toggle {
    background: #222222;
    border-color: #3a3a3a;
}

body.dark-mode .nav-toggle span {
    background: #e0e0e0;
}

body.dark-mode .nav-toggle:hover {
    background: #2a2a2a;
}

body.dark-mode .to-top {
    background: #ffffff;
    color: #111111;
}

body.dark-mode .placeholder-card {
    border-color: #2a2a2a;
}

body.dark-mode .project-stack span {
    background: #1a1a1a;
    border-color: #2a2a2a;
}

body.dark-mode .form-group input:focus,
body.dark-mode .form-group textarea:focus {
    border-color: #ffffff;
    box-shadow: 0 0 0 3px rgba(255,255,255,0.06);
}

/* ========================================
   RESPONSIVE - Tablet only (mobile handled by mobile.css)
   ======================================== */

@media (max-width: 900px) {
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .project-featured {
        padding: 2rem;
    }
}