/* 
   Project: Jacob Benedict Personal Website
   Theme: Premium Dark / Human Factors Engineering / Glassmorphism
*/

/* --- Design System & Variables --- */
:root {
    /* Color Palette - Professional Light */
    --bg-primary: #ffffff;
    /* Pure White */
    --bg-secondary: #f8fafc;
    /* Slate 50 */

    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    /* Slate 200 */
    --card-hover-border: #38bdf8;

    --text-primary: #334155;
    /* Slate 700 */
    --text-white: #0f172a;
    /* Slate 900 (Headings) */
    --text-secondary: #64748b;
    /* Slate 500 */

    --accent-color: #0284c7;
    /* Sky 600 - darker for contrast */
    --accent-glow: rgba(2, 132, 199, 0.15);

    --secondary-accent: #059669;
    /* Emerald 600 */
    --tertiary-accent: #d97706;
    /* Amber 600 */

    --border-color: #e2e8f0;

    /* Theme Vars (Light Mode Defaults) */
    --header-bg: rgba(255, 255, 255, 0.85);
    --gradient-start: #0f172a;
    --gradient-end: #0284c7;
    --card-hover-bg: #f8fafc;


    /* Typography */
    --font-heading: 'Inter', system-ui, -apple-system, sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease-in-out;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

/* --- Dark Mode Override --- */
@media (prefers-color-scheme: dark) {
    :root {
        /* Color Palette - Dark Mode */
        --bg-primary: #0f172a;
        /* Slate 900 */
        --bg-secondary: #1e293b;
        /* Slate 800 */

        --card-bg: #1e293b;
        /* Slate 800 */
        --card-border: #334155;
        /* Slate 700 */
        --card-hover-border: #38bdf8;
        /* Sky 400 */

        --text-primary: #cbd5e1;
        /* Slate 300 */
        --text-white: #f1f5f9;
        /* Slate 100 */
        --text-secondary: #94a3b8;
        /* Slate 400 */

        --accent-color: #38bdf8;
        /* Sky 400 */
        --accent-glow: rgba(56, 189, 248, 0.15);

        --border-color: #334155;
        /* Slate 700 */

        /* New Dark Mode Theme Vars */
        --header-bg: rgba(15, 23, 42, 0.85);
        --gradient-start: #f1f5f9;
        --gradient-end: #38bdf8;
        --card-hover-bg: #1e293b;
        /* Matches card-bg */

        /* Shadows - slightly stronger for dark mode */
        --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
        --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
        --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
    }
}

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

html {
    scroll-behavior: smooth;
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

body {
    overflow-x: hidden;
    background-color: var(--bg-primary);
    background-image:
        radial-gradient(circle at 10% 20%, rgba(2, 132, 199, 0.03) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(5, 150, 105, 0.03) 0%, transparent 20%);
}

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

a:hover {
    color: #0369a1;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* --- Typography Classes --- */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--text-white);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-sm);
}

h2 {
    font-size: 2.5rem;
    font-weight: 700;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

/* --- Layout Utilities --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-lg) 0;
    /* Reduced from xl to lg globally to tighten sections */
}

/* --- Header / Nav --- */
.site-header {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: var(--spacing-sm) 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text-white);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

.nav-link:hover {
    color: var(--text-white);
}

@media (max-width: 768px) {
    .site-header {
        padding: 0.5rem 0;
        /* Tighter padding for mobile */
    }

    .nav-container {
        padding: 0 1rem;
        /* Maximize width usage */
    }

    .nav-links {
        gap: 0.8rem;
        /* Minimize gap between items */
    }

    .nav-link {
        font-size: 0.75rem;
        /* Smaller text size */
    }

    .logo {
        font-size: 1.2rem;
        /* Slightly smaller logo */
    }
}

/* --- Hero Section --- */
.hero {
    min-height: 60vh;
    /* Reduced from 85vh to close the gap */
    display: flex;
    align-items: center;
    padding-top: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    /* Matched normal section spacing */
    background: radial-gradient(circle at top right, rgba(2, 132, 199, 0.05), transparent 50%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.eyebrow {
    color: var(--accent-color);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 0.85rem;
    margin-bottom: var(--spacing-xs);
}

.hero h3 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.15rem;
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.6rem;
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color) 0%, #0284c7 100%);
    color: #fff;
    border: none;
    box-shadow: 0 4px 14px rgba(56, 189, 248, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.6);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid #cbd5e1;
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: #f1f5f9;
    border-color: var(--text-primary);
    color: var(--text-white);
}

@media (min-width: 768px) {
    .hero-container {
        grid-template-columns: 1.2fr 0.8fr;
        font-size: 1rem;
        /* alignment fix */
    }
}

/* Profile Image */
.profile-img {
    width: 380px;
    height: 380px;
    object-fit: cover;
    border-radius: 50%;
    margin: 0 auto;
    border: 4px solid #fff;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-medium);
}

.profile-img:hover {
    transform: scale(1.05);
    border-color: var(--accent-glow);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

/* --- Section Styling --- */
.section-title {
    margin-bottom: var(--spacing-lg);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 40px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 2px;
}

/* --- Experience (Timeline) --- */
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-color), transparent);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: var(--spacing-lg);
}

.timeline-marker {
    position: absolute;
    left: 13px;
    top: 24px;
    width: 16px;
    height: 16px;
    background: #fff;
    border: 2px solid var(--accent-color);
    border-radius: 50%;
    z-index: 1;
    box-shadow: 0 0 0 4px rgba(2, 132, 199, 0.1);
}

.timeline-content {
    background: var(--card-bg);
    padding: var(--spacing-md);
    border-radius: 16px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.timeline-content:hover {
    transform: translateY(-2px);
    border-color: var(--card-hover-border);
    box-shadow: var(--shadow-lg);
}

/* Timeline Grid Layout (Side-by-Side) */
.timeline-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .timeline-grid {
        grid-template-columns: 1.2fr 0.8fr;
        /* Text wider than image */
        align-items: center;
    }
}

.timeline-text {
    display: flex;
    flex-direction: column;
}

.timeline-visual {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    height: 100%;
    min-height: 200px;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: var(--shadow-sm);
    transition: transform 0.5s ease;
}

.timeline-content:hover .project-img {
    transform: scale(1.05);
}

/* Typography for Timeline */
.timeline-date {
    font-size: 0.85rem;
    color: var(--accent-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.timeline-role {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.timeline-company {
    font-size: 1.1rem;
    color: var(--text-white);
    opacity: 0.9;
    margin-bottom: var(--spacing-sm);
}

/* Legacy Header/Showcase - ensuring cleanup or fallback */
.content-header {
    display: none;
}

.project-showcase {
    display: none;
}

/* --- Education Cards --- */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.card {
    background: var(--card-bg);
    padding: var(--spacing-md);
    border-radius: 16px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.card:hover {
    border-color: var(--accent-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.card-subtitle {
    font-size: 1rem;
    color: var(--accent-color);
    margin-bottom: var(--spacing-sm);
}

.card-meta {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* --- Publications --- */
.publications-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.pub-item {
    background: var(--card-bg);
    padding: 1.25rem;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    transition: all 0.2s;
}

.pub-item:hover {
    border-color: var(--accent-color);
    background: var(--card-hover-bg);
}

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

.pub-type {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-color);
    font-weight: 700;
    margin-right: 0.5rem;
    text-transform: uppercase;
}

.pub-meta {
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.pub-meta p {
    margin-bottom: 0.5rem;
}

.pub-meta strong {
    color: var(--text-primary);
}

/* --- Footer --- */
footer {
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
    color: var(--text-secondary);
}

/* --- Contact --- */
.contact-links {
    margin-top: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.contact-item {
    font-size: 1.2rem;
    color: var(--text-white);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-item:hover {
    color: var(--accent-color);
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {

    /* Adjust Container Padding */
    .container {
        padding: 0 var(--spacing-sm);
    }

    /* Profile Image Responsiveness */
    .profile-img {
        width: 280px;
        height: 280px;
        max-width: 100%;
    }

    /* Hero Layout */
    .hero {
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
        text-align: center;
    }

    .hero-actions {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    /* Timeline Adjustments */
    .timeline::before {
        left: 10px;
    }

    .timeline-item {
        padding-left: 35px;
    }

    .timeline-marker {
        left: 3px;
    }

    .timeline-content {
        padding: var(--spacing-sm);
    }

    /* Education Grid */
    .education-grid {
        grid-template-columns: 1fr;
    }

    /* Publication List */
    .pub-item {
        flex-direction: column;
        gap: 0.5rem;
    }

    .pub-type {
        display: inline-block;
        margin-bottom: 0.25rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .profile-img {
        width: 100%;
        height: auto;
        aspect-ratio: 1/1;
    }

    h1 {
        font-size: 2rem;
    }

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