/* ==========================================================================
   FRANK RYPA PORTFOLIO - DESIGN SYSTEM & STYLESHEET
   ========================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
    /* Fonts */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Theme: Dark Mode (Default) */
    --bg-main: HSL(224, 25%, 8%);
    --bg-surface: rgba(22, 28, 45, 0.65);
    --bg-surface-solid: HSL(222, 22%, 12%);
    --bg-nav: rgba(15, 23, 42, 0.8);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(59, 130, 246, 0.5);
    
    --text-primary: HSL(210, 38%, 95%);
    --text-muted: HSL(215, 20%, 72%);
    --text-inverse: HSL(222, 47%, 11%);
    
    --color-primary: HSL(217, 91%, 60%);
    --color-primary-hover: HSL(217, 91%, 68%);
    --color-accent: HSL(195, 95%, 55%);
    --color-accent-hover: HSL(195, 95%, 65%);
    
    --glow-shadow: rgba(59, 130, 246, 0.25);
    --card-shadow: 0 10px 30px -10px rgba(2, 6, 23, 0.7);
    --glass-blur: blur(16px) saturate(180%);

    --mesh-1: rgba(30, 58, 138, 0.35);
    --mesh-2: rgba(8, 47, 73, 0.3);
    --mesh-3: rgba(6, 78, 59, 0.15);

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Overrides */
body.light-theme {
    --bg-main: HSL(210, 30%, 97%);
    --bg-surface: rgba(255, 255, 255, 0.75);
    --bg-surface-solid: HSL(0, 0%, 100%);
    --bg-nav: rgba(255, 255, 255, 0.85);
    --border-color: rgba(15, 23, 42, 0.08);
    --border-focus: rgba(59, 130, 246, 0.5);
    
    --text-primary: HSL(222, 47%, 12%);
    --text-muted: HSL(215, 16%, 45%);
    --text-inverse: HSL(210, 38%, 95%);
    
    --color-primary: HSL(221, 83%, 53%);
    --color-primary-hover: HSL(221, 83%, 45%);
    --color-accent: HSL(200, 90%, 45%);
    --color-accent-hover: HSL(200, 90%, 38%);
    
    --glow-shadow: rgba(59, 130, 246, 0.1);
    --card-shadow: 0 10px 30px -15px rgba(15, 23, 42, 0.15);
    
    --mesh-1: rgba(219, 234, 254, 0.8);
    --mesh-2: rgba(224, 242, 254, 0.7);
    --mesh-3: rgba(209, 250, 229, 0.4);
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* --- Background Mesh Gradient Effect --- */
.mesh-gradient {
    position: absolute;
    width: 60vw;
    height: 60vw;
    border-radius: 50%;
    filter: blur(80px);
    z-index: -10;
    pointer-events: none;
    opacity: 0.8;
}

.bg-element-1 {
    top: -10%;
    right: -10%;
    background: var(--mesh-1);
    animation: float-slow 25s infinite alternate ease-in-out;
}

.bg-element-2 {
    top: 45%;
    left: -20%;
    background: var(--mesh-2);
    animation: float-slow 30s infinite alternate-reverse ease-in-out 2s;
}

.bg-element-3 {
    bottom: -10%;
    right: -10%;
    background: var(--mesh-3);
    animation: float-slow 20s infinite alternate ease-in-out;
}

@keyframes float-slow {
    0% {
        transform: translate(0, 0) scale(1);
    }
    100% {
        transform: translate(8%, 8%) scale(1.15);
    }
}

/* --- Utility Classes --- */
.glass-card {
    background: var(--bg-surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

body.light-theme .glass-card:hover {
    border-color: rgba(0, 0, 0, 0.15);
}

/* --- Section Typography & Layouts --- */
section {
    padding: 6rem 0;
    position: relative;
}

.section-header {
    margin-bottom: 4rem;
    position: relative;
}

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.section-heading {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.section-line {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: 2px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.8rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 8px;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--text-inverse);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--glow-shadow);
    color: var(--text-inverse);
    filter: brightness(1.1);
}

.btn-secondary {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    backdrop-filter: var(--glass-blur);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

body.light-theme .btn-secondary:hover {
    background: rgba(0, 0, 0, 0.03);
}

/* --- Header / Navigation --- */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: var(--bg-nav);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-normal), border-color var(--transition-normal);
}

.nav-container {
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

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

.nav-menu ul {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-primary);
    font-weight: 550;
    font-size: 0.95rem;
    position: relative;
    padding: 0.25rem 0;
    opacity: 0.85;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transition: width var(--transition-fast);
}

.nav-link:hover {
    opacity: 1;
    color: var(--text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.theme-toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.theme-toggle-btn:hover {
    border-color: var(--color-primary);
    transform: rotate(15deg) scale(1.05);
}

body.dark-theme .sun-icon { display: block; }
body.dark-theme .moon-icon { display: none; }
body.light-theme .sun-icon { display: none; }
body.light-theme .moon-icon { display: block; }

.mobile-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 26px;
    height: 18px;
}

.mobile-nav-toggle span {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-normal);
}

/* --- Hero Section --- */
.hero-section {
    padding-top: 10rem;
    padding-bottom: 6rem;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: center;
}

.hero-greeting {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 1rem;
    display: block;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--text-muted));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.light-theme .hero-title {
    background: linear-gradient(135deg, HSL(222, 47%, 12%) 40%, HSL(215, 16%, 35%));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

#typed-text {
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cursor {
    animation: blink 0.8s infinite;
    color: var(--color-primary);
    font-weight: 400;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-lead {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-ctas {
    display: flex;
    gap: 1.5rem;
}

/* Hero Code Visual Card */
.visual-card-wrapper {
    perspective: 1000px;
}

.visual-card {
    background: var(--bg-surface-solid);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transform: rotateX(8deg) rotateY(-12deg) rotateZ(1deg);
    transition: transform var(--transition-slow);
}

.visual-card:hover {
    transform: rotateX(2deg) rotateY(-3deg) rotateZ(0deg) scale(1.02);
}

.card-header-bar {
    height: 38px;
    background: rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    padding: 0 1rem;
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 6px;
    display: inline-block;
}

.dot.red { background-color: #ef4444; }
.dot.yellow { background-color: #f59e0b; }
.dot.green { background-color: #10b981; }

.tab-title {
    margin-left: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: monospace;
}

.card-inner-code {
    padding: 1.5rem;
    font-family: monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-muted);
}

.code-line {
    white-space: nowrap;
}

.padding-1 { padding-left: 1.5rem; }

/* Custom Syntax Highlight Mock */
.c-tag { color: #f43f5e; }
.c-keyword { color: #3b82f6; }
.c-type { color: #10b981; }
.c-str { color: #eab308; }
.c-name { color: #a855f7; }
.c-comment { color: #64748b; font-style: italic; }

/* --- About Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.about-quick-facts {
    margin-top: 2.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.about-quick-facts h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.facts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
}

.fact-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.fact-item i {
    color: var(--color-primary);
    width: 20px;
    height: 20px;
}

.about-education-timeline {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.edu-card {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: transform var(--transition-normal);
}

.edu-card:hover {
    transform: translateX(5px);
}

.edu-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.edu-details h3 {
    font-size: 1.15rem;
    margin-bottom: 0.25rem;
}

.edu-year {
    font-size: 0.8rem;
    color: var(--color-primary);
    font-weight: 600;
    display: block;
    margin-bottom: 0.25rem;
}

.edu-school {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.edu-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --- Skills Section --- */
.skills-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 3rem;
}

.tab-btn {
    padding: 0.6rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    border-color: var(--color-primary);
}

.tab-btn.active {
    background: var(--color-primary);
    color: var(--text-inverse);
    border-color: var(--color-primary);
}

.skills-grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    padding: 2rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
}

.skill-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
}

.skill-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.skill-header i {
    color: var(--color-primary);
    width: 28px;
    height: 28px;
}

.skill-header h3 {
    font-size: 1.2rem;
}

.skill-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.cert-card {
    border-left: 3px solid var(--color-accent);
}

.cert-gold {
    color: #eab308 !important;
}

/* --- Experience Section --- */
.experience-filters {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

.filter-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
}

.filter-btns {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    padding: 0.5rem 1.2rem;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--color-primary);
}

.filter-btn.active {
    background: var(--color-primary);
    color: var(--text-inverse);
    border-color: var(--color-primary);
}

/* Timeline Layout */
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 0;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background: var(--border-color);
    top: 0;
    bottom: 0;
    left: 200px;
    transition: background var(--transition-normal);
}

.timeline-item {
    padding: 1.5rem 0;
    position: relative;
    display: grid;
    grid-template-columns: 200px 1fr;
    align-items: flex-start;
}

.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-main);
    border: 3px solid var(--color-primary);
    left: 193px;
    top: 2.2rem;
    z-index: 5;
    transition: transform var(--transition-fast), border-color var(--transition-normal);
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.3);
    border-color: var(--color-accent);
}

.timeline-date {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-primary);
    padding-right: 2.5rem;
    text-align: right;
    margin-top: 0.6rem;
}

.timeline-content {
    padding: 2rem;
    margin-left: 2.5rem;
}

.timeline-company {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    font-weight: 600;
    display: block;
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.timeline-bullets {
    list-style-type: square;
    padding-left: 1.2rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.timeline-bullets li {
    margin-bottom: 0.6rem;
}

.timeline-bullets li:last-child {
    margin-bottom: 0;
}

/* --- References Section --- */
.references-clean-card {
    padding: 3.5rem;
    text-align: center;
    max-width: 650px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
}

.ref-placeholder-icon {
    width: 64px;
    height: 64px;
    color: var(--color-primary);
    background: rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    padding: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.5rem;
}

.references-clean-card h3 {
    font-size: 1.8rem;
    font-weight: 700;
}

.ref-message {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.6;
}

/* --- Contact Section --- */
.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 4rem;
}

.contact-info-panel {
    padding: 3rem;
}

.contact-info-panel h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.contact-pitch {
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-size: 1.05rem;
}

.info-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-link-item {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.info-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-icon i {
    width: 22px;
    height: 22px;
}

.info-text .label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.info-text a, .info-text span {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.info-text a:hover {
    color: var(--color-primary);
}

.contact-academic-callout {
    margin-top: 3rem;
    padding: 1.2rem;
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 10px;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.contact-academic-callout i {
    color: #10b981;
    flex-shrink: 0;
    margin-top: 0.2rem;
}

.callout-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Contact Form */
.contact-form-panel {
    padding: 3rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    position: relative;
    width: 100%;
}

.floating-group input, 
.floating-group textarea {
    width: 100%;
    padding: 0.9rem 1rem;
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

body.light-theme .floating-group input,
body.light-theme .floating-group textarea {
    background: rgba(255, 255, 255, 0.5);
}

.floating-group input:focus,
.floating-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(0, 0, 0, 0.25);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

body.light-theme .floating-group input:focus,
body.light-theme .floating-group textarea:focus {
    background: #fff;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.08);
}

.floating-group label {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.95rem;
    pointer-events: none;
    transition: transform var(--transition-fast), top var(--transition-fast), font-size var(--transition-fast), color var(--transition-fast);
}

.floating-group textarea ~ label {
    top: 1.5rem;
}

/* Floating Label Animation */
.floating-group input:focus ~ label,
.floating-group input:not(:placeholder-shown) ~ label,
.floating-group textarea:focus ~ label,
.floating-group textarea:not(:placeholder-shown) ~ label {
    top: -8px;
    left: 0.8rem;
    transform: translateY(0) scale(0.85);
    font-size: 0.8rem;
    padding: 0 0.4rem;
    background-color: var(--bg-surface-solid);
    color: var(--color-primary);
    border-radius: 4px;
}

.btn-submit {
    align-self: flex-start;
    padding: 0.9rem 2.2rem;
}

.form-feedback {
    font-size: 0.9rem;
    font-weight: 550;
    margin-top: -0.5rem;
    min-height: 20px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.form-feedback.success {
    color: #10b981;
    opacity: 1;
}

.form-feedback.error {
    color: #ef4444;
    opacity: 1;
}

/* --- Footer --- */
.main-footer {
    background: var(--bg-surface-solid);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-meta {
    font-style: italic;
    opacity: 0.8;
}

/* --- Responsive Layout Breakpoints --- */

@media (max-width: 1024px) {
    html {
        font-size: 15px;
    }
    
    .hero-container {
        grid-template-columns: 1.2fr 0.8fr;
        gap: 2rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 4rem 0;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-lead {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-ctas {
        justify-content: center;
    }
    
    .visual-card {
        transform: none;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .visual-card:hover {
        transform: scale(1.01);
    }
    
    /* Navigation Menu Toggle */
    .mobile-nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 80%;
        height: calc(100vh - 70px);
        background: var(--bg-surface-solid);
        backdrop-filter: var(--glass-blur);
        -webkit-backdrop-filter: var(--glass-blur);
        border-left: 1px solid var(--border-color);
        padding: 3rem;
        transition: right var(--transition-normal);
    }
    
    .nav-menu.open {
        right: 0;
    }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 2.5rem;
        align-items: flex-start;
    }
    
    .nav-link {
        font-size: 1.2rem;
    }
    
    /* Mobile burger active animation */
    .mobile-nav-toggle.open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }
    
    .mobile-nav-toggle.open span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-nav-toggle.open span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }
    
    /* Timeline Mobile styling */
    .timeline::after {
        left: 20px;
    }
    
    .timeline-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding-left: 40px;
    }
    
    .timeline-dot {
        left: 13px;
        top: 3.5rem;
    }
    
    .timeline-date {
        text-align: left;
        padding-right: 0;
        margin-top: 0;
    }
    
    .timeline-content {
        margin-left: 0;
        padding: 1.5rem;
    }
    
    .facts-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .hero-ctas {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .contact-info-panel, 
    .contact-form-panel {
        padding: 1.5rem;
    }
}


/* ==========================================================================
   PRINT STYLESHEET (Optimizes webpage for PDF Resume export!)
   ========================================================================== */
@media print {
    body {
        background: #fff !important;
        color: #000 !important;
        font-size: 11pt !important;
        line-height: 1.4 !important;
    }

    /* Hide web elements */
    .main-header,
    .mesh-gradient,
    .hero-ctas,
    .theme-toggle-btn,
    .mobile-nav-toggle,
    .experience-filters,
    .skills-tabs,
    .ref-actions,
    .contact-form-panel,
    .main-footer,
    .contact-academic-callout,
    .hero-visual,
    .section-tag,
    .section-line,
    .edu-icon,
    .references-section {
        display: none !important;
    }

    section {
        padding: 1.5rem 0 !important;
        page-break-inside: avoid;
    }

    .container {
        max-width: 100% !important;
        padding: 0 !important;
    }

    /* Hero print styling */
    .hero-section {
        min-height: auto !important;
        padding-top: 0 !important;
        text-align: left !important;
    }
    
    .hero-title {
        font-size: 28pt !important;
        margin-bottom: 5pt !important;
        background: none !important;
        -webkit-text-fill-color: initial !important;
        color: #000 !important;
    }

    .hero-subtitle {
        font-size: 14pt !important;
        margin-bottom: 10pt !important;
    }

    .hero-lead {
        font-size: 11pt !important;
        margin-bottom: 0 !important;
        color: #333 !important;
    }

    /* Section headers */
    .section-heading {
        font-size: 16pt !important;
        border-bottom: 2px solid #000 !important;
        padding-bottom: 3pt !important;
        margin-bottom: 10pt !important;
    }

    /* Grid layouts */
    .about-grid,
    .skills-grid-container,
    .references-grid,
    .contact-grid {
        display: block !important;
    }

    /* About details */
    .about-quick-facts {
        display: none !important;
    }

    .about-education-timeline {
        margin-top: 15pt !important;
    }

    .edu-card {
        background: none !important;
        border: none !important;
        padding: 0 !important;
        margin-bottom: 12pt !important;
    }

    /* Skills details */
    .skill-card {
        background: none !important;
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        margin-bottom: 10pt !important;
        page-break-inside: avoid;
    }

    .skill-header h3 {
        font-size: 11pt !important;
        font-weight: bold !important;
        margin-bottom: 2pt !important;
    }

    .skill-card p {
        font-size: 10pt !important;
        color: #333 !important;
    }

    /* Timeline print styling */
    .timeline::after {
        display: none !important;
    }

    .timeline-item {
        display: block !important;
        padding: 0 !important;
        margin-bottom: 15pt !important;
        page-break-inside: avoid;
    }

    .timeline-dot {
        display: none !important;
    }

    .timeline-date {
        text-align: left !important;
        font-size: 10pt !important;
        font-weight: bold !important;
        color: #555 !important;
        margin-bottom: 2pt !important;
    }

    .timeline-content {
        margin: 0 !important;
        padding: 0 !important;
        background: none !important;
        border: none !important;
        box-shadow: none !important;
    }

    .timeline-company {
        font-size: 10pt !important;
        color: #000 !important;
    }

    .timeline-content h3 {
        font-size: 12pt !important;
        font-weight: bold !important;
        margin-bottom: 4pt !important;
    }

    .timeline-bullets {
        padding-left: 15pt !important;
    }

    .timeline-bullets li {
        font-size: 10pt !important;
        color: #222 !important;
        margin-bottom: 3pt !important;
    }



    /* Contact Details for printing */
    .contact-section {
        page-break-before: always;
    }

    .info-links {
        display: grid !important;
        grid-template-columns: 1fr 1fr 1fr !important;
        gap: 10pt !important;
    }

    .info-link-item {
        align-items: flex-start !important;
    }

    .info-icon {
        display: none !important;
    }
}