/* CSS Variables */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f9f9f9;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --hover-bg: #f5f5f5;
    --shadow: rgba(0, 0, 0, 0.05);
    --font-main: 'Commit Mono', monospace;
    --accent-color: #000000;
    --spacing-unit: 1rem;
    --max-width: 1200px;
    --radius: 0px;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #ffffff;
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    font-size: 13px;
    letter-spacing: -0.03em;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem 2rem 1.5rem;
}

/* Typography */
h1 {
    font-weight: 700;
    font-size: 2rem;
    letter-spacing: -0.02em;
}

h2 {
    font-weight: 600;
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    border-bottom: 2px dashed var(--border-color);
    padding-bottom: 0.5rem;
}

h3 {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.7;
    letter-spacing: -0.02em;
}

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

a:hover {
    opacity: 0.7;
}

/* Helpers */
.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
    opacity: 0;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.section {
    margin-bottom: 2rem;
}

/* Profile Section */
.section-profile {
    margin-bottom: 2rem;
    padding-top: 2rem;
}

.profile-card {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: var(--bg-primary);
    padding: 2.5rem;
    /* Increased padding for the main profile card */
    border-radius: 0;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    /* Subtle shadow initially */
    transition: var(--transition);
}

/* Hover effect only for GitHub Profile and About Me cards (desktop only) */
@media (hover: hover) and (pointer: fine) {

    #profile .profile-card:hover,
    #about>.profile-card:hover {
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
        border-color: var(--text-primary);
    }
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    /* Increased gap */
}

.avatar {
    width: 240px;
    height: 240px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--hover-bg);
    box-shadow: var(--shadow-md);
}

.profile-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.profile-info h1 {
    font-size: 2.5rem;
    line-height: 1.1;
    margin-bottom: 0.2rem;
}

.username {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.bio {
    margin-top: 0.5rem;
    font-size: 1.1rem;
    max-width: 600px;
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .profile-header {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }

    .avatar {
        width: 170px;
        height: 170px;
    }

    .profile-info {
        align-items: center;
        /* Center flex children (like buttons) */
    }

    .profile-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.8rem;
        width: 100%;
        justify-content: stretch;
    }

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

.profile-actions {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 1.5rem;
    /* Added spacing from bio */
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1rem;
    border-radius: 0;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    border: 1px solid transparent;
    /* Base border for sizing */
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--text-primary);
    color: white;
    border-color: var(--text-primary);
}

.btn-primary:hover {
    background-color: #333;
    opacity: 1;
}

.btn-secondary {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--hover-bg);
    border-color: var(--text-primary);
    transform: translateY(-1px);
}


/* About Section */
.about-intro-container p {
    font-size: 15px;
    line-height: 1.8;
}

.about-intro em {
    font-style: normal;
    background: linear-gradient(120deg, #e0e0e0 0%, #f5f5f5 100%);
    padding: 0 4px;
    border-radius: 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

@media (min-width: 600px) {
    .about-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.about-card {
    background: var(--bg-primary);
    /* Changed from var(--hover-bg) */
    padding: 2rem;
    border-radius: 0;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    /* Changed from transparent */
}

.about-card:hover {
    transform: translateY(-4px);
    /* Unified hover effect */
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
    /* Match var(--shadow-lg) which was meant to be used */
    border-color: var(--text-primary);
}

.about-card p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* Experience Section */
/* Experience Section */
.experience-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

@media (min-width: 600px) {
    .experience-list {
        grid-template-columns: 1fr 1fr;
    }
}

.exp-card {
    background: var(--bg-primary);
    /* Changed from var(--hover-bg) */
    padding: 2rem;
    border-radius: 0;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    /* Changed from transparent */
    display: flex;
    flex-direction: column;
}

.exp-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
    border-color: var(--text-primary);
}

.exp-header {
    display: flex;
    flex-direction: column;
    /* Better for card layout */
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.exp-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-feature-settings: "tnum";
    background: var(--bg-primary);
    width: fit-content;
    padding: 0.2rem 0.6rem;
    border-radius: 0;
    border: 1px solid var(--border-color);
}

.exp-role {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.exp-details {
    list-style-type: none;
    margin-top: 1rem;
}

.exp-details li {
    position: relative;
    padding-left: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.exp-details li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--text-primary);
}

/* Stack Section */
.stack-categories {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.stack-group h3 {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}

.stack-icons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.stack-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 0.6rem 1rem;
    border-radius: 0;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.stack-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.stack-item img {
    width: 16px;
    height: 16px;
    opacity: 0.7;
}

@media (min-width: 768px) {
    .stack-item {
        padding: 0.8rem 1.4rem;
        /* Larger padding */
        font-size: 1rem;
        /* Larger font */
        gap: 0.7rem;
    }

    .stack-item img {
        width: 20px;
        /* Larger icon */
        height: 20px;
    }
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 600px) {
    .projects-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 900px) {
    .projects-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

.project-card {
    border: 1px solid var(--border-color);
    border-radius: 0;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
    border-color: var(--text-primary);
}

.project-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.project-title {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0;
    flex-grow: 1;
}

.project-btn {
    margin-top: 1rem;
    width: 100%;
    justify-content: center;
}

/* Skeletons */
.skeleton {
    background-color: var(--hover-bg);
}

.skeleton-text {
    background-color: var(--hover-bg);
    color: transparent !important;
    border-radius: 0;
    user-select: none;
}

.project-skeleton {
    height: 150px;
    background-color: var(--hover-bg);
    border-radius: 0;
}

/* Footer Card Section */
.footer-card {
    background: var(--bg-primary);
    padding: 0;
    border-radius: 0;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
    max-height: 240px;
    overflow: hidden;
}

.footer-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
    border-color: var(--text-primary);
}

.footer-image {
    max-width: 120%;
    max-height: 290px;
    height: auto;
    width: auto;
    border-radius: 0;
    object-fit: cover;
    display: block;
    margin-bottom: -15px;
}

/* Back to Top Button */
.back-to-top-container {
    display: flex;
    justify-content: center;
}

.back-to-top-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1rem;
    border-radius: 0;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
    font-family: var(--font-main);
}

.back-to-top-btn:hover {
    background-color: var(--hover-bg);
    border-color: var(--text-primary);
    transform: translateY(-1px);
}

.back-to-top-btn svg {
    transition: transform 0.2s ease;
}

.back-to-top-btn:hover svg {
    transform: translateY(-2px);
}

/* Responsive adjustments for footer card */
@media (min-width: 768px) {
    .footer-card {
        padding: 0;
        max-height: 260px;
    }

    .footer-image {
        max-width: 90%;
        max-height: 320px;
    }
}

@media (max-width: 767px) {
    .footer-card {
        padding: 0;
        justify-content: flex-end;
        max-height: 220px;
    }

    .footer-image {
        max-width: 120%;
        max-height: 260px;
        margin-right: -10px;
    }
}

footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.8rem;
    color: #ccc;
}

footer p {
    text-align: center;
    /* Override global justification */
    margin-bottom: 0;
}

/* Case Study Section */
/* Case Study Section */
.case-study-objective {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

.case-study-trigger {
    display: inline-flex;
    /* Match .btn */
    align-items: center;
    gap: 0.5rem;
    /* Match .btn */
    padding: 0.7rem 1rem;
    /* Match .btn */
    border-radius: 0;
    /* Match .btn */
    font-weight: 500;
    /* Match .btn */
    font-size: 0.9rem;
    /* Match .btn */
    cursor: pointer;
    user-select: none;
    width: fit-content;
    margin: 0.5rem 0;
    /* Align left (remove auto), add vertical spacing */

    /* Mix of btn-secondary styles */
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
    /* Reduced vertical spacing */
    position: relative;
    z-index: 5;
    will-change: transform;
    backface-visibility: hidden;
}

.case-study-trigger:hover {
    background-color: var(--hover-bg);
    /* Match .btn-secondary:hover */
    border-color: var(--text-primary);
    /* Match .btn-secondary:hover */
    transform: translateY(-1px);
    /* Match .btn-secondary:hover */
    box-shadow: none;
    /* Remove previous strong shadow */
}

.chevron-icon {
    transition: transform 0.3s ease;
    /* Resetted to simpler transition if needed or kept */
    min-width: 16px;
    /* Similar to other icons */
    height: 16px;
}

.case-study-trigger.active .chevron-icon {
    transform: rotate(180deg);
}

.case-study-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.6s ease-out, opacity 0.4s ease-out;
}

.case-study-content.open {
    /* Max-height is now handled by JS for precise sizing */
    opacity: 1;
    margin-top: 1rem;
    transition: max-height 0.8s ease-in, opacity 0.4s ease-in;
}

.case-study-block h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.case-study-block h4 {
    color: var(--text-primary);
    font-weight: 600;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.code-block {
    background-color: var(--hover-bg);
    padding: 1.5rem;
    border-radius: 0;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.85rem;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    margin: 1rem 0;
    color: var(--text-secondary);
}

.code-block code {
    white-space: pre;
}

/* Reuse existing lists or specific overrides if needed */
.case-study-block .exp-details {
    margin-top: 0.5rem;
}

/* Collapsible styles (for generic collapsible sections) */
.collapsible-header {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1rem;
    border-radius: 0;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    user-select: none;
    width: fit-content;
    margin: 1.5rem 0;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
    position: relative;
    z-index: 5;
    will-change: transform;
    backface-visibility: hidden;
}

.collapsible-header:hover {
    background-color: var(--hover-bg);
    border-color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: none;
}

.collapsible-header.active .chevron-icon {
    transform: rotate(180deg);
}

.collapsible-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.6s ease-out, opacity 0.4s ease-out;
}

.collapsible-content.open {
    opacity: 1;
    margin-top: 1rem;
    transition: max-height 0.8s ease-in, opacity 0.4s ease-in;
}

/* Certifications Section */
.cert-categories {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.cert-category-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    border-left: 4px solid var(--text-primary);
    /* Visual accent */
    padding-left: 1rem;
    line-height: 1.2;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
}

.cert-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.cert-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
    border-color: var(--text-primary);
}

.cert-img {
    width: 100%;
    height: 140px;
    object-fit: cover;
    background-color: var(--hover-bg);
    /* Placeholder color if image missing */
    border-bottom: 1px solid var(--border-color);
}

.cert-info {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    flex-grow: 1;
}

.cert-info h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.cert-issuer {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background-color: var(--hover-bg);
    padding: 0.2rem 0.5rem;
    border-radius: 0;
    width: fit-content;
}

/* ========================================
   DISABLE ALL HOVER EFFECTS ON MOBILE/TOUCH DEVICES
   ======================================== */
@media (hover: none) {

    a:hover,
    .btn-primary:hover,
    .btn-secondary:hover,
    .about-card:hover,
    .exp-card:hover,
    .stack-item:hover,
    .project-card:hover,
    .footer-card:hover,
    .back-to-top-btn:hover,
    .back-to-top-btn:hover svg,
    .case-study-trigger:hover,
    .collapsible-header:hover,
    .cert-card:hover,
    #profile .profile-card:hover,
    #about>.profile-card:hover {
        /* Reset all hover effects to default state */
        box-shadow: inherit !important;
        border-color: inherit !important;
        background-color: inherit !important;
        transform: none !important;
        color: inherit !important;
    }
}