/* ==========================================================================
   PORTFOLIO DESIGN SYSTEM & STYLES (ALEX GORDINHO FARIA)
   ========================================================================== */

/* --- Custom Variables & Themes --- */
:root {
    /* Fonts */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    /* Layout */
    --max-width: 1200px;
    --nav-height: 70px;
    --border-radius-sm: 8px;
    --border-radius-md: 14px;
    --border-radius-lg: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Variables */
body.light-theme {
    --bg-primary: #f6f8fa;
    --bg-secondary: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    
    --accent: #4f46e5;
    --accent-light: rgba(79, 70, 229, 0.1);
    --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #8b5cf6 100%);
    --accent-gradient-hover: linear-gradient(135deg, #4338ca 0%, #7c3aed 100%);
    
    --border-color: rgba(15, 23, 42, 0.08);
    --border-hover: rgba(15, 23, 42, 0.15);
    --card-bg: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(15, 23, 42, 0.06);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.08);
    
    --glow-color-1: rgba(79, 70, 229, 0.05);
    --glow-color-2: rgba(139, 92, 246, 0.05);
}

/* Dark Theme Variables (Default) */
body.dark-theme {
    --bg-primary: #080b11;
    --bg-secondary: #0f131a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    
    --accent: #6366f1;
    --accent-light: rgba(99, 102, 241, 0.15);
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --accent-gradient-hover: linear-gradient(135deg, #4f46e5 0%, #9333ea 100%);
    
    --border-color: rgba(255, 255, 255, 0.07);
    --border-hover: rgba(255, 255, 255, 0.18);
    --card-bg: rgba(15, 19, 26, 0.6);
    --glass-bg: rgba(8, 11, 17, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
    
    --glow-color-1: rgba(99, 102, 241, 0.12);
    --glow-color-2: rgba(168, 85, 247, 0.1);
}

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

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

/* --- Ambient Blur Lights --- */
.ambient-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(140px);
    z-index: -1;
    pointer-events: none;
    transition: background-color var(--transition-normal);
}

.glow-1 {
    top: -100px;
    right: -100px;
    background-color: var(--glow-color-1);
}

.glow-2 {
    top: 600px;
    left: -200px;
    background-color: var(--glow-color-2);
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* --- Utility Typography --- */
h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

/* --- Layout Elements --- */
.main-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: calc(var(--nav-height) + 2rem) 2rem 4rem;
}

.section {
    padding: 5rem 0;
}

.section-header {
    margin-bottom: 3.5rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    position: relative;
    display: inline-block;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
}

/* --- Buttons & Inputs --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.8rem 1.6rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

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

.btn-primary:hover {
    background: var(--accent-gradient-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-light);
}

.btn-secondary {
    background-color: var(--accent-light);
    color: var(--accent);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--accent);
    color: #ffffff;
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background-color: var(--border-color);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.btn-icon:hover {
    color: var(--text-primary);
    background-color: var(--border-color);
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 100;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-container {
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    letter-spacing: -0.03em;
}

.logo-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-gradient);
    border-radius: 50%;
}

.logo-ext {
    color: var(--text-secondary);
    font-weight: 400;
}

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

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    position: relative;
    padding: 0.25rem 0;
}

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

.nav-link.active {
    color: var(--accent);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: 2px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-switch {
    text-decoration: none;
    font-size: 1.2rem;
    line-height: 1;
}

/* Theme Icon Toggle */
.sun-icon { display: none; }
.moon-icon { display: block; }

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

/* --- Cards General --- */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), opacity var(--transition-normal);
}

/* --- Hero Section --- */
.hero-section {
    padding-top: 3rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--accent-light);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.4rem 0.9rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
}

.pulse-indicator {
    width: 8px;
    height: 8px;
    background-color: #10b981;
    border-radius: 50%;
    position: relative;
}

.pulse-indicator::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: #10b981;
    border-radius: 50%;
    animation: pulse 1.8s infinite ease-in-out;
    top: 0;
    left: 0;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.8; }
    100% { transform: scale(2.4); opacity: 0; }
}

.hero-name {
    font-size: 4rem;
    font-weight: 850;
    line-height: 1.05;
    margin-bottom: 0.5rem;
    letter-spacing: -0.04em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

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

.contact-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
    cursor: pointer;
    position: relative;
    padding: 0.35rem 0.75rem;
    background-color: var(--border-color);
    border-radius: var(--border-radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.contact-item:hover {
    color: var(--text-primary);
    background-color: var(--border-hover);
}

.contact-item i {
    width: 16px;
    height: 16px;
    color: var(--accent);
}

.contact-item .tooltip {
    visibility: hidden;
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text-primary);
    color: var(--bg-primary);
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
    white-space: nowrap;
}

.contact-item:hover .tooltip {
    visibility: visible;
    opacity: 1;
}

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

/* --- iOS Device Mockup --- */
.hero-visual {
    display: flex;
    justify-content: center;
}

.ios-mockup {
    width: 290px;
    height: 590px;
    background-color: #000000;
    border: 9px solid #1e293b;
    border-radius: 42px;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,255,255,0.05);
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: border-color var(--transition-normal);
}

body.light-theme .ios-mockup {
    border-color: #e2e8f0;
}

.ios-status-bar {
    height: 44px;
    padding: 0 1.8rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    z-index: 10;
}

body.light-theme .ios-status-bar {
    color: #000000;
}

.ios-icons {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.ios-screen-content {
    flex: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-radius: 34px;
    margin: 1px;
}

.mockup-profile {
    text-align: center;
    margin-top: 1rem;
}

.mockup-avatar {
    width: 68px;
    height: 68px;
    background: var(--accent-gradient);
    border-radius: 50%;
    margin: 0 auto 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: 0 4px 15px var(--accent-light);
}

.mockup-profile h3 {
    font-size: 1.15rem;
    margin-bottom: 0.15rem;
}

.mockup-profile p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.mockup-skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.mockup-skill-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 0.85rem;
    text-align: left;
}

.mockup-skill-card i {
    width: 20px;
    height: 20px;
    margin-bottom: 0.35rem;
}

.mockup-skill-card h4 {
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 0.1rem;
}

.mockup-skill-card p {
    font-size: 0.65rem;
    color: var(--text-tertiary);
    line-height: 1.2;
}

.ios-home-bar {
    width: 110px;
    height: 4px;
    background-color: #ffffff;
    border-radius: 2px;
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

body.light-theme .ios-home-bar {
    background-color: #000000;
}

/* --- Timeline Section --- */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 10px;
    bottom: 10px;
    left: 200px;
    width: 2px;
    background-color: var(--border-color);
    transition: background-color var(--transition-normal);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: flex;
    transition: opacity var(--transition-normal);
}

.timeline-item.dimmed {
    opacity: 0.25;
}

.timeline-item.highlighted .experience-card {
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.15);
}

.timeline-dot {
    position: absolute;
    left: 201px;
    top: 26px;
    width: 10px;
    height: 10px;
    background-color: var(--bg-primary);
    border: 3px solid var(--accent);
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 2;
    transition: border-color var(--transition-normal), background-color var(--transition-normal);
}

.timeline-date {
    width: 170px;
    padding-right: 30px;
    text-align: right;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-secondary);
    padding-top: 1.35rem;
}

.experience-card {
    flex: 1;
    margin-left: 50px;
    cursor: default;
}

.experience-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.25rem;
    gap: 1.5rem;
}

.role-title {
    font-size: 1.35rem;
    margin-bottom: 0.25rem;
}

.company-name {
    font-size: 1rem;
    color: var(--accent);
    font-weight: 600;
}

.location-badge {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background-color: var(--border-color);
    padding: 0.25rem 0.65rem;
    border-radius: 40px;
    white-space: nowrap;
}

.location-badge i {
    width: 12px;
    height: 12px;
}

.experience-bullets {
    list-style-type: none;
    margin-bottom: 1.5rem;
}

.experience-bullets li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.experience-bullets li::before {
    content: '•';
    color: var(--accent);
    font-weight: 800;
    position: absolute;
    left: 0;
    top: 0;
}

.card-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.25rem;
}

.tech-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    background-color: var(--border-color);
    padding: 0.25rem 0.65rem;
    border-radius: 6px;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.tech-tag:hover, .tech-tag.active {
    background-color: var(--accent);
    color: #ffffff;
}

.filter-indicator {
    display: none;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    background-color: var(--accent-light);
    border: 1px solid var(--accent);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    width: fit-content;
    animation: slideDown var(--transition-normal);
}

.btn-clear-filter {
    background: none;
    border: none;
    color: var(--accent);
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Skills Section --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.skill-group-card {
    height: 100%;
}

.group-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.group-header i {
    width: 24px;
    height: 24px;
}

.group-header h3 {
    font-size: 1.25rem;
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.skill-interactive-btn {
    background-color: var(--border-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem 0.9rem;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.skill-interactive-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
}

.skill-interactive-btn.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: #ffffff;
    box-shadow: 0 4px 10px var(--accent-light);
}

/* --- Education & Side Section --- */
.education-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.education-timeline {
    position: relative;
    padding-left: 2rem;
    border-left: 2px solid var(--border-color);
    margin-top: 2rem;
}

.education-item {
    position: relative;
    margin-bottom: 2.5rem;
}

.education-item:last-child {
    margin-bottom: 0;
}

.education-item::before {
    content: '';
    position: absolute;
    left: calc(-2rem - 1px);
    transform: translateX(-50%);
    top: 5px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--bg-primary);
    border: 3px solid var(--accent);
}

.edu-date {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.35rem;
}

.edu-degree {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.edu-institution {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.edu-desc {
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

.side-column-grid {
    display: flex;
    flex-direction: column;
}

.cert-card, .language-card {
    margin-top: 2rem;
}

.cert-list {
    list-style-type: none;
}

.cert-list li {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.25rem;
}

.cert-list li:last-child {
    margin-bottom: 0;
}

.cert-year {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent);
    background-color: var(--accent-light);
    height: fit-content;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    white-space: nowrap;
}

.cert-detail h4 {
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 0.15rem;
}

.cert-detail p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Languages */
.lang-item {
    margin-bottom: 1.25rem;
}

.lang-item:last-child {
    margin-bottom: 0;
}

.lang-name {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    display: flex;
    justify-content: space-between;
}

.lang-level {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.lang-bar-container {
    height: 4px;
    background-color: var(--border-color);
    border-radius: 2px;
    width: 100%;
}

.lang-bar {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 2px;
}

/* --- Contact Section --- */
.contact-section {
    padding-bottom: 2rem;
}

.contact-card {
    padding: 3rem;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.contact-card::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background-color: var(--glow-color-1);
    border-radius: 50%;
    filter: blur(80px);
    bottom: -150px;
    right: -150px;
    pointer-events: none;
}

.contact-card-info {
    max-width: 700px;
}

.contact-card-info h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.contact-card-info p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.contact-details-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2.5rem;
}

.contact-detail-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background-color: var(--border-color);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.contact-detail-link:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    background-color: var(--card-bg);
    box-shadow: var(--shadow-sm);
}

.icon-wrap {
    width: 42px;
    height: 42px;
    background-color: var(--accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    flex-shrink: 0;
}

.icon-wrap i {
    width: 20px;
    height: 20px;
}

.contact-detail-link span {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.15rem;
}

.contact-detail-link strong {
    font-size: 0.9rem;
    word-break: break-all;
}

/* --- Footer --- */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    text-align: center;
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-socials {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.footer-social-link {
    color: var(--text-secondary);
    transition: color var(--transition-fast), transform var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.footer-social-link:hover {
    color: var(--accent);
    transform: translateY(-2px);
}

.footer-social-link i {
    width: 20px;
    height: 20px;
}

.footer p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-bottom: 0.5rem;
}

.footer p:last-child {
    margin-bottom: 0;
}

/* --- Toast Notification --- */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: 0.75rem 1.5rem;
    border-radius: 40px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    z-index: 1000;
    transition: transform var(--transition-normal) cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity var(--transition-fast);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* --- Animation Classes --- */
.animate-fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp var(--transition-slow) forwards;
}

.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Responsive Adaptations --- */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1.1fr 0.9fr;
        gap: 2rem;
    }
    
    .hero-name {
        font-size: 3.25rem;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .education-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .contact-details-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: calc(var(--nav-height) + 1rem) 1.5rem 3rem;
    }
    
    .section {
        padding: 3.5rem 0;
    }
    
    .nav-links {
        display: none; /* Can add a drawer in future, for simplicity we keep it clean */
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-visual {
        order: -1; /* Image first on mobile */
    }
    
    .hero-name {
        font-size: 2.75rem;
    }
    
    .hero-title {
        font-size: 1.4rem;
        margin-bottom: 1.5rem;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-dot {
        left: 21px;
    }
    
    .timeline-item {
        flex-direction: column;
    }
    
    .timeline-date {
        width: 100%;
        text-align: left;
        padding-left: 45px;
        padding-bottom: 0.5rem;
        padding-top: 0;
    }
    
    .experience-card {
        margin-left: 0;
        margin-top: 1.25rem;
    }
    
    .card-header {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .location-badge {
        align-self: flex-start;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

/* --- Publications --- */
.publications-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.pub-card {
    padding: 2rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.pub-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.pub-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.pub-title-area {
    flex-grow: 1;
}

.pub-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 0.35rem;
}

.pub-authors {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.pub-meta {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.pub-journal {
    color: var(--accent);
}

.pub-actions {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    align-items: center;
}

.pub-abstract {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out, margin-top 0.4s ease, padding 0.4s ease;
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-sm);
    padding: 0 1.25rem;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.pub-abstract.show {
    max-height: 800px; /* High enough to contain the text */
    padding: 1rem 1.25rem;
    margin-top: 1rem;
    border-left: 3px solid var(--accent);
}

.abstract-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.abstract-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    background-color: var(--accent-light);
}

.abstract-btn i {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-fast);
}

.abstract-btn.active i {
    transform: rotate(180deg);
}

.btn-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.85rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.btn-link:hover {
    color: var(--text-primary);
}

.btn-link i {
    width: 14px;
    height: 14px;
}

@media (max-width: 768px) {
    .pub-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

/* --- Volunteering --- */
.volunteer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.volunteer-card {
    padding: 1.75rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.volunteer-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.volunteer-card-header {
    margin-bottom: 0.75rem;
}

.volunteer-role {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 0.25rem;
}

.volunteer-organization {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.volunteer-meta {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-weight: 600;
}

.volunteer-badge-container {
    margin-left: auto;
    text-align: right;
}

.volunteer-badge {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 0.2rem 0.5rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.7rem;
    color: var(--text-secondary);
    display: inline-block;
    line-height: 1.2;
    white-space: nowrap;
}

.volunteer-desc {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    flex-grow: 1;
}

.custom-svg-icon {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    display: inline-block;
    vertical-align: middle;
}

@media print {
    body {
        background: #ffffff !important;
        color: #000000 !important;
    }
    .navbar, .btn-icon, #theme-toggle, .ambient-glow, .hero-buttons, .filter-indicator, .hero-visual, .toast, .btn-clear-filter, .contact-details-grid {
        display: none !important;
    }
    .main-content {
        padding: 0 !important;
        margin: 0 !important;
    }
    .section {
        padding: 2rem 0 !important;
        page-break-inside: avoid;
    }
    .card {
        border: none !important;
        box-shadow: none !important;
        background: transparent !important;
        padding: 0 !important;
    }
    .timeline::before, .timeline-dot {
        display: none !important;
    }
    .experience-card {
        margin-left: 0 !important;
    }
    .skills-list button {
        border: 1px solid #ccc !important;
        background: transparent !important;
        color: #000 !important;
    }
}