:root {
    /* Light Mode */
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent-color: #4f46e5;
    --border-color: #e2e8f0;
    --card-border: #cbd5e1;
    --mono-font: 'JetBrains Mono', monospace;
    --body-font: 'Inter', sans-serif;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05);
}

[data-theme="dark"] {
    /* Dark Mode */
    --bg-color: #0b0e14;
    --card-bg: #151b28;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-color: #818cf8;
    --border-color: #1e293b;
    --card-border: #1e293b;
    --shadow: none;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, h1, h2, h3, p, span, a, iconify-icon, .nav-tab, button {
    transition: color 0.3s ease;
}

/* This prevents Safari from calculating backgrounds for plain text. I didn't write it and im glad I didn't. */
body, 
.profile-card, .contact-card, .section-card, .nav-card,
.job-card, .project-card, .lab-card, 
.nav-tab, button,
.tech-tag, .lab-tech span, .project-tech-list span, .role-date,
.lab-status, .security-badge {
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
body { background-color: var(--bg-color); color: var(--text-primary); font-family: var(--body-font); line-height: 1.6; }

.portfolio-container { display: flex; max-width: 1200px; margin: 0 auto; padding: 2rem; gap: 2rem; min-height: 100vh; }
.sidebar { width: 300px; flex-shrink: 0; }
.main-content { flex-grow: 1; max-width: 800px; }

/* Cards */
.profile-card, .contact-card, .section-card, .nav-card, .job-card, .project-card, .lab-card { 
    background: var(--card-bg); 
    border: 1px solid var(--card-border); 
    border-radius: 12px; 
    box-shadow: var(--shadow);
}

.profile-card, .contact-card { padding: 1.5rem; margin-bottom: 1.5rem; text-align: center; }
.profile-image { width: 120px; height: 120px; border-radius: 50%; object-fit: cover; border: 3px solid var(--border-color); margin-bottom: 1rem; }
.profile-name { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.25rem; }
.phonetic-spelling {font-family: var(--mono-font); font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 1rem; opacity: 0.8; }
.profile-title { font-family: var(--mono-font); font-size: 0.85rem; color: var(--accent-color); margin-bottom: 1rem; }
.profile-status { font-size: 0.8rem; color: var(--text-secondary); }
.status-dot { width: 8px; height: 8px; background-color: #10b981; border-radius: 50%; display: inline-block; margin-right: 5px;}

/* Contact Items */
.contact-item { display: flex; align-items: center; padding: 0.75rem; color: var(--text-secondary); text-decoration: none; border-radius: 6px; border: 1px solid transparent; }
.contact-item:hover { background: var(--bg-color); color: var(--text-primary); border-color: var(--border-color); }
.contact-item iconify-icon { margin-right: 0.75rem; font-size: 1.2rem; }
.highlight-link { margin-top: 0.5rem; border: 1px dashed var(--card-border); justify-content: center; }

/* Contact Divider */
.contact-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 0.5rem 0;
    width: 100%;
}
/* Nav */
.nav-card { padding: 0.75rem; margin-bottom: 2rem; position: sticky; top: 1rem; z-index: 10; }
.nav-bar-flex { display: flex; justify-content: space-between; align-items: center; }
.nav-tabs { display: flex; gap: 0.5rem; }
.nav-tab {background: transparent; border: none; padding: 0.5rem 1rem; cursor: pointer; font-family: var(--body-font); font-weight: 500; color: var(--text-secondary); border-radius: 6px; -webkit-appearance: none; flex-shrink: 0; font-size: 1rem; }
.nav-tab:hover { color: var(--text-primary); background: var(--bg-color); }
.nav-tab.active { color: #fff; background: var(--text-primary); } 
[data-theme="dark"] .nav-tab.active { background: var(--text-primary); color: var(--bg-color); font-weight: 700; }

#dark-mode-toggle {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px; 
    height: 40px;
    padding: 0;
    border-radius: 6px;
    margin-left: 0.5rem;
}

#dark-mode-toggle:hover {
    background: var(--bg-color);
    color: var(--text-primary);
}
/* Sections */
.content-section { display: none; animation: fadeIn 0.3s ease; }
.content-section.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

.section-card { padding: 2rem; margin-bottom: 2rem; }
.section-title { font-size: 1.25rem; margin-bottom: 1.5rem; font-weight: 700; letter-spacing: -0.5px; display: flex; justify-content: space-between; align-items: center;}
.subtitle-badge { font-size: 0.75rem; font-family: var(--mono-font); font-weight: 400; color: var(--text-secondary); border: 1px solid var(--border-color); padding: 2px 8px; border-radius: 4px; }

/* Disclaimer */
.disclaimer-text { display: flex; gap: 1rem; background: var(--bg-color); padding: 1rem; border-radius: 8px; margin-bottom: 1.5rem; font-size: 0.9rem; color: var(--text-secondary); border: 1px solid var(--border-color); }
.disclaimer-text iconify-icon { font-size: 1.5rem; color: var(--accent-color); flex-shrink: 0; }

/* Job Card */
.job-card { display: flex; gap: 1.5rem; margin-bottom: 2rem; padding: 1.5rem; }
.job-logo-col { display: flex; flex-direction: column; align-items: center; width: 50px; flex-shrink: 0; }
.company-logo { width: 48px; height: 48px; border-radius: 8px; object-fit: contain; background: #fff; border: 1px solid var(--border-color); padding: 2px; z-index: 2; }
.timeline-line { width: 2px; background: var(--border-color); flex-grow: 1; margin-top: 0.5rem; }
.job-content { flex-grow: 1; }
.company-name { font-size: 1.1rem; margin-bottom: 1rem; font-weight: 700; }

.role-block { margin-bottom: 0.5rem; }
.role-header { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.5rem;}
.role-title { font-weight: 600; font-size: 0.95rem; }
.role-date { font-family: var(--mono-font); font-size: 0.75rem; color: var(--text-secondary); background: var(--bg-color); padding: 2px 6px; border-radius: 4px; border: 1px solid var(--border-color);}
.role-description ul { list-style: none; padding: 0; }
.role-description li { position: relative; padding-left: 1.25rem; margin-bottom: 0.5rem; font-size: 0.9rem; color: var(--text-secondary); }
.role-description li:before { content: "•"; color: var(--accent-color); position: absolute; left: 0; font-weight: bold; }
.role-divider { height: 1px; background-image: linear-gradient(to right, var(--border-color) 50%, transparent 50%); background-size: 10px 1px; margin: 1.5rem 0; }

/* --- NESTED CARD LOGIC --- */
.section-card .job-card {
    background-color: var(--bg-color);
    box-shadow: none;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.section-card .job-card:last-child {
    margin-bottom: 0;
}

.section-card .company-logo {
    background: var(--card-bg);
}

/* Certifications Styling */
.cert-grid {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.cert-tag {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-color);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-family: var(--mono-font);
    font-size: 0.85rem;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.cert-tag iconify-icon {
    color: var(--accent-color);
    font-size: 1.1rem;
}
/* --- LAB CARD --- */
.lab-card { padding: 1.5rem; cursor: pointer; transition: all 0.2s; border-left: 4px solid var(--accent-color); display: flex; flex-direction: column; }
.lab-card:hover { transform: translateY(-2px); border-color: var(--accent-color); box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1); }
.lab-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.5rem; }
.lab-card p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 1rem; }

.lab-card-header { display: flex; justify-content: space-between; margin-bottom: 1rem; }
.lab-icon { font-size: 1.5rem; color: var(--accent-color); }
.lab-status { 
    font-family: var(--mono-font); 
    font-size: 0.7rem; 
    color: #d97706; 
    background: #fef3c7; 
    padding: 4px 8px; 
    border-radius: 4px; 
    border: 1px solid #fcd34d; 
    line-height: 1;
    display: inline-flex;
    align-items: center;
    height: fit-content;
}
[data-theme="dark"] .lab-status { background: #451a03; color: #fbbf24; border-color: #92400e; }

.lab-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.lab-tech span {
    background: var(--bg-color);
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    font-size: 0.75rem;
    font-family: var(--mono-font);
}

.lab-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--text-primary);
    color: var(--card-bg);
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: transform 0.2s ease, background-color 0.2s;
}

.lab-btn:hover {
    transform: translateX(4px);
    opacity: 0.9;
}


.lab-card {
    cursor: default;
}

.lab-card:hover {
    transform: translateY(-2px); 
    box-shadow: var(--shadow);
}

/* --- CLASSIFIED PROJECTS --- */
.projects-grid { display: grid; gap: 1.5rem; }
.project-card.classified { 
    border-left: 4px solid #64748b; 
    background: repeating-linear-gradient(45deg, var(--card-bg), var(--card-bg) 10px, var(--bg-color) 10px, var(--bg-color) 20px); 
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}
.project-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.project-title { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }
.lock-icon { color: var(--text-secondary); opacity: 0.5; font-size: 1.2rem; }

.project-body { display: flex; flex-direction: column; flex-grow: 1; }
.security-badge { display: inline-block; font-family: var(--mono-font); font-size: 0.7rem; color: #ef4444; border: 1px solid #ef4444; padding: 2px 6px; border-radius: 2px; margin: 0.5rem 0 1rem 0; font-weight: 700; letter-spacing: 1px; width: fit-content;}
.classified-text { font-family: var(--mono-font); font-size: 0.9rem; color: var(--text-secondary); opacity: 0.9; margin-bottom: 1rem; line-height: 1.5; }

.project-tech-list { 
    display: flex; 
    gap: 0.5rem; 
    font-size: 0.75rem; 
    color: var(--text-secondary); 
    font-family: var(--mono-font); 
    margin-top: auto;
    flex-wrap: wrap; 
}
.project-tech-list span { background: var(--bg-color); padding: 2px 6px; border-radius: 4px; border: 1px solid transparent;}
[data-theme="light"] .project-tech-list span { border-color: #e2e8f0; background: #fff; }

/* Tech Grid */
.tech-stack-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; }
.tech-group h3 { font-size: 0.8rem; text-transform: uppercase; color: var(--text-secondary); margin-bottom: 1rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tech-tag { font-family: var(--mono-font); font-size: 0.8rem; background: var(--bg-color); color: var(--text-primary); padding: 0.25rem 0.5rem; border-radius: 4px; border: 1px solid var(--border-color); }

@media (max-width: 768px) {
    .portfolio-container { flex-direction: column; padding: 1rem; }
    .sidebar { width: 100%; }
    .job-logo-col { display: none; }
    .job-logo-col {
        display: flex;
        width: 40px;
    }
    .company-logo {
        width: 36px;
        height: 36px;
    }
    .job-card { 
        gap: 0.75rem;
        padding: 1rem; 
    }
    .nav-card { padding: 0.5rem; }
    .nav-tab { padding: 0.5rem 0.75rem; font-size: 0.9rem; }
    .section-card { padding: 1.25rem; }
    .project-card.classified, .lab-card { padding: 1rem; }
    .projects-grid {
        display: flex;
        flex-direction: column;
        width: 100%;
    }
}