:root {
    --bg-color: #f8fafc;
    --text-color: #1e293b;
    --heading-color: #0f172a;
    --accent-color: #3b82f6;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --muted-text: #64748b;
    --highlight-bg: #dbeafe;
    --tag-bg: #f1f5f9;

    --engineering-color: #0ea5e9;
    --leadership-color: #f59e0b;
    --coaching-color: #8b5cf6;
    --advisory-color: #10b981;
    --creative-color: #ec4899;
    --communication-color: #f43f5e;

    --container-width: 900px;
}

/* Base Light Mode (Default) */
body {
    --bg-color: #f8fafc;
    --text-color: #1e293b;
    --heading-color: #0f172a;
    --accent-color: #3b82f6;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --muted-text: #64748b;
    --highlight-bg: #dbeafe;
    --tag-bg: #f1f5f9;
}

/* Explicit Dark Mode */
body.dark-mode {
    --bg-color: #0f172a;
    --text-color: #cbd5e1;
    --heading-color: #f8fafc;
    --accent-color: #38bdf8;
    --border-color: #1e293b;
    --card-bg: #1e293b;
    --muted-text: #94a3b8;
    --highlight-bg: #075985;
    --tag-bg: #334155;
}

/* System Preference Fallback (if no explicit class) */
@media (prefers-color-scheme: dark) {
    body:not(.light-mode) {
        --bg-color: #0f172a;
        --text-color: #cbd5e1;
        --heading-color: #f8fafc;
        --accent-color: #38bdf8;
        --border-color: #1e293b;
        --card-bg: #1e293b;
        --muted-text: #94a3b8;
        --highlight-bg: #075985;
        --tag-bg: #334155;
    }
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 2rem 1rem;
    transition: background-color 0.3s ease;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
}

header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    color: var(--heading-color);
    letter-spacing: -0.025em;
    margin-bottom: 0.5rem;
}

h2 {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--muted-text);
    margin-bottom: 1.5rem;
}

h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.contact-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    font-size: 0.9rem;
}

.contact-grid a {
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.contact-grid a:hover {
    border-color: var(--accent-color);
}

/* Focus Controls */
.focus-controls {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1rem;
    margin-bottom: 3rem;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    border: 1px solid var(--border-color);
}

.focus-controls-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.focus-instruction {
    font-size: 0.875rem;
    color: var(--muted-text);
    margin-bottom: 0;
}

.search-container {
    position: relative;
    flex: 1;
    max-width: 300px;
}

#resume-search {
    width: 100%;
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
    background-color: var(--tag-bg);
    color: var(--text-color);
    font-size: 0.875rem;
    outline: none;
    transition: all 0.2s;
}

#resume-search:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background-color: var(--card-bg);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--muted-text);
    pointer-events: none;
}

@media (max-width: 640px) {
    .focus-controls-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .search-container {
        max-width: 100%;
    }
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.focus-btn {
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
    background-color: var(--tag-bg);
    color: var(--text-color);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.focus-btn:hover {
    background-color: var(--border-color);
}

.focus-btn.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

/* Specific Tag Colors */
.focus-btn[data-tag="engineering"].active {
    background-color: var(--engineering-color);
    border-color: var(--engineering-color);
}

.focus-btn[data-tag="leadership"].active {
    background-color: var(--leadership-color);
    border-color: var(--leadership-color);
}

.focus-btn[data-tag="coaching"].active {
    background-color: var(--coaching-color);
    border-color: var(--coaching-color);
}

.focus-btn[data-tag="advisory"].active {
    background-color: var(--advisory-color);
    border-color: var(--advisory-color);
}

.focus-btn[data-tag="creative"].active {
    background-color: var(--creative-color);
    border-color: var(--creative-color);
}

.focus-btn[data-tag="communication"].active {
    background-color: var(--communication-color);
    border-color: var(--communication-color);
}

/* Main Content */
#summary-section {
    margin-bottom: 3rem;
}

#summary-content p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.experience-item {
    margin-bottom: 2.5rem;
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.75rem;
}

.company {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--heading-color);
}

.role {
    font-weight: 600;
    color: var(--accent-color);
}

.period {
    font-size: 0.875rem;
    color: var(--muted-text);
}

.bullets {
    list-style: none;
}

.bullet-item {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        color 0.3s ease;
    opacity: 0;
    transform: translateY(10px);
}

.bullet-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.bullet-item::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* Highlighting Logic */
.bullet-item.dimmed {
    opacity: 0.25;
    transform: scale(0.98);
}

.bullet-item.highlighted {
    color: var(--heading-color);
    font-weight: 600;
    transform: translateX(10px);
}

.bullet-item.highlighted::before {
    transform: scale(1.5);
    color: var(--accent-color);
}

/* Base side-by-side transition for layout changes */
.experience-item {
    transition: opacity 0.5s ease;
}

/* Side by Side Sections */
.side-by-side {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

@media (max-width: 768px) {
    .side-by-side {
        grid-template-columns: 1fr;
    }
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background-color: var(--tag-bg);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
}

/* Footer / Printing */
footer {
    margin-top: 5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--muted-text);
    font-size: 0.875rem;
}

.secondary-btn {
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}

.secondary-btn:hover {
    background-color: var(--tag-bg);
    border-color: var(--accent-color);
}

.theme-toggle-btn {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 100;
    padding: 0.75rem;
    border-radius: 50%;
    width: 3rem;
    height: 3rem;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

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

.theme-toggle-btn .moon-icon {
    display: block;
}

body.dark-mode .theme-toggle-btn .sun-icon {
    display: block;
}

body.dark-mode .theme-toggle-btn .moon-icon {
    display: none;
}

@media (max-width: 1024px) {
    .theme-toggle-btn {
        position: static;
        margin-left: auto;
        margin-bottom: 1rem;
    }
}

@media print {
    body {
        padding: 0;
        background: white;
        color: black;
    }

    .focus-controls,
    #print-btn {
        display: none;
    }

    .experience-item {
        page-break-inside: avoid;
    }

    .bullet-item.dimmed {
        opacity: 1;
        transform: none;
    }

    .container {
        max-width: 100%;
    }
}