/*
Theme Name: Tomer Wetzler Portfolio
Theme URI: https://tomerwetzler.com
Author: Tomer Wetzler
Author URI: https://tomerwetzler.com
Description: Minimal professional portfolio theme for AI Security Researcher Tomer Wetzler.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: tomer-portfolio
*/

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

:root {
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-text: #1a1a2e;
    --color-text-secondary: #4a4a6a;
    --color-accent: #2d5fd3;
    --color-accent-hover: #1e44a0;
    --color-border: #e2e2e8;
    --color-tag-bg: #eef2ff;
    --color-tag-text: #2d5fd3;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --max-width: 1100px;
    --section-spacing: 6rem;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-accent-hover);
}

img {
    max-width: 100%;
    height: auto;
}

/* === Typography === */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-text);
}

h1 { font-size: 2.75rem; letter-spacing: -0.03em; }
h2 { font-size: 2rem; letter-spacing: -0.02em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }

p {
    margin-bottom: 1rem;
    color: var(--color-text-secondary);
}

/* === Layout === */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: var(--section-spacing) 0;
}

.section-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.section-title {
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin-bottom: 3rem;
}

/* === Header / Navigation === */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 250, 250, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.site-logo {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.site-logo:hover {
    color: var(--color-accent);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.site-nav a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color 0.2s ease;
}

.site-nav a:hover {
    color: var(--color-text);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    margin: 5px 0;
    transition: all 0.3s ease;
}

/* === Hero === */
.hero {
    padding: 10rem 0 var(--section-spacing);
    min-height: 70vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 720px;
}

.hero-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-accent);
    background: var(--color-tag-bg);
    padding: 0.35rem 1rem;
    border-radius: 100px;
    margin-bottom: 1.5rem;
}

.hero h1 {
    margin-bottom: 1.25rem;
}

.hero-description {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin-bottom: 2rem;
}

.hero-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    color: #fff;
}

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

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* === Research Cards === */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.research-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
}

.research-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 4px 20px rgba(45, 95, 211, 0.08);
    transform: translateY(-2px);
}

.research-card-number {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.research-card h3 {
    margin-bottom: 0.75rem;
    line-height: 1.35;
}

.research-card h3 a {
    color: var(--color-text);
}

.research-card h3 a:hover {
    color: var(--color-accent);
}

.research-card-excerpt {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    flex-grow: 1;
    margin-bottom: 1.25rem;
}

.research-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.7rem;
    border-radius: 100px;
    background: var(--color-tag-bg);
    color: var(--color-tag-text);
}

/* === Open Source Tools === */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(480px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
    color: inherit;
    text-decoration: none;
}

.tool-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 4px 20px rgba(45, 95, 211, 0.08);
    transform: translateY(-2px);
    color: inherit;
}

.tool-card-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: #111;
}

.tool-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.tool-card-body {
    padding: 1.75rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.tool-card-body h3 {
    margin-bottom: 0.75rem;
}

.tool-card-body p {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    flex-grow: 1;
    margin-bottom: 1.25rem;
}

.tool-card-body .research-card-tags {
    margin-top: auto;
}

/* === Experience Timeline === */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5rem;
    bottom: 0.5rem;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-bottom: 3rem;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0.5rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 2px solid var(--color-bg);
    transform: translateX(-4px);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.timeline-item h3 {
    margin-bottom: 0.25rem;
}

.timeline-role {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.timeline-description {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.timeline-description ul {
    list-style: none;
    padding: 0;
}

.timeline-description li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.4rem;
}

.timeline-description li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.65rem;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--color-border);
}

/* === Recognitions === */
.recognitions-list {
    display: grid;
    gap: 1.25rem;
}

.recognition-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 10px;
}

.recognition-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-tag-bg);
    border-radius: 8px;
    color: var(--color-accent);
    font-size: 1.1rem;
}

.recognition-item h4 {
    margin-bottom: 0.25rem;
}

.recognition-item p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* === Contact === */
.contact-section {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
}

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

.contact-info p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    transition: color 0.2s ease;
}

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

.contact-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.contact-form .form-group {
    margin-bottom: 1.25rem;
}

.contact-form label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: var(--color-text);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--color-border);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color 0.2s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

/* === Footer === */
.site-footer {
    padding: 2rem 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.site-footer p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* === Single Research Post === */
.single-research {
    padding: 8rem 0 var(--section-spacing);
}

.single-research-header {
    max-width: 720px;
    margin: 0 auto 3rem;
}

.single-research-header h1 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.single-research-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.single-research-content {
    max-width: 720px;
    margin: 0 auto;
}

.single-research-content h2 {
    font-size: 1.5rem;
    margin: 2.5rem 0 1rem;
}

.single-research-content h3 {
    font-size: 1.2rem;
    margin: 2rem 0 0.75rem;
}

.single-research-content p {
    margin-bottom: 1.25rem;
}

.single-research-content ul,
.single-research-content ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
    color: var(--color-text-secondary);
}

.single-research-content li {
    margin-bottom: 0.4rem;
}

.single-research-content img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 2rem auto;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.single-research-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
}

.single-research-content th,
.single-research-content td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    text-align: left;
    color: var(--color-text-secondary);
}

.single-research-content th {
    background: var(--color-tag-bg);
    color: var(--color-text);
    font-weight: 600;
}

.single-research-content tr:nth-child(even) {
    background: var(--color-bg);
}

.single-research-content code {
    font-family: var(--font-mono);
    font-size: 0.88em;
    background: var(--color-tag-bg);
    padding: 0.15em 0.4em;
    border-radius: 4px;
}

.single-research-content pre {
    background: var(--color-text);
    color: #e2e2e8;
    padding: 1.5rem;
    border-radius: 10px;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.single-research-content pre code {
    background: none;
    padding: 0;
    color: inherit;
}

.single-research-content blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: 1.25rem;
    margin: 1.5rem 0;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* === GitHub Repo Link === */
.github-repo-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.github-repo-link svg {
    flex-shrink: 0;
}

/* === Back Link === */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 2rem;
    color: var(--color-text-secondary);
}

.back-link:hover {
    color: var(--color-accent);
}

/* === Responsive === */
@media (max-width: 768px) {
    :root {
        --section-spacing: 4rem;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .hero {
        padding: 7rem 0 var(--section-spacing);
        min-height: auto;
    }

    .hero-description {
        font-size: 1.05rem;
    }

    .site-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: 1.5rem 2rem;
        gap: 1rem;
    }

    .site-nav.active {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }

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

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

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

    .timeline {
        padding-left: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1.25rem;
    }

    h1 { font-size: 1.75rem; }

    .hero-links {
        flex-direction: column;
    }

    .btn {
        justify-content: center;
    }
}