/*
   Author: Matthieu Chaldebas
   Version: 7.0 - Final & Complete
*/

/* --- 1. THEME & VARIABLES --- */
:root {
    /* Dark Theme (Default) */
    --primary-color: #785dfe;
    --secondary-color: #435be4;
    --light-color: #9d8afb;
    --bg-light: #161b22;
    --bg-dark: #0d1117;
    --text-dark: #c9d1d9;
    --text-light: #8b949e;
    --border-color: #30363d;
    --highlight-bg: rgba(88, 166, 255, 0.1);
    --rgb-primary: 120, 93, 254;
    
    /* Light Theme Variables */
    --bg-light-light: #ffffff;
    --bg-dark-light: #f8f9fa;
    --text-dark-light: #2d3748;
    --text-light-light: #4a5568;
    --border-color-light: #e2e8f0;
    --highlight-bg-light: rgba(120, 93, 254, 0.1);

    --font-family-sans: "Inter", sans-serif;
    --font-family-serif: "Lora", serif;
    
    /* Theme State */
    --current-bg-light: var(--bg-light);
    --current-bg-dark: var(--bg-dark);
    --current-text-dark: var(--text-dark);
    --current-text-light: var(--text-light);
    --current-border-color: var(--border-color);
    --current-highlight-bg: var(--highlight-bg);
    --hover-bg: rgba(120, 93, 254, 0.06);
}

/* Light Theme */
[data-theme="light"] {
    --current-bg-light: var(--bg-light-light);
    --current-bg-dark: var(--bg-dark-light);
    --current-text-dark: var(--text-dark-light);
    --current-text-light: var(--text-light-light);
    --current-border-color: var(--border-color-light);
    --current-highlight-bg: var(--highlight-bg-light);
    --hover-bg: rgba(120, 93, 254, 0.06);
}

/* --- 2. GLOBAL STYLES --- */
* { 
    box-sizing: border-box; 
    margin: 0; 
    padding: 0; 
}

html { 
    scroll-behavior: smooth; 
    font-size: 15px; /* or even 14px, default is usually 16px */
}

body {
    font-family: var(--font-family-sans);
    line-height: 1.7;
    background-color: var(--current-bg-dark);
    color: var(--current-text-dark);
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container { 
    max-width: 960px; 
    width: 90%; 
    margin: 0 auto; 
}

h2 {
    font-family: var(--font-family-serif);
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: 60px;
    color: var(--current-text-dark);
    transition: color 0.3s ease;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 15px auto 0;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.6s cubic-bezier(0.19, 1, 0.22, 1);
}

h2.visible::after {
    transform: scaleX(1);
}

/* --- 3. FLOATING NAVIGATION --- */
#main-nav {
    /* --- Positioning & Sizing --- */
    position: fixed;
    top: -100px; /* Starts hidden above the viewport */
    left: 50%;
    transform: translateX(-50%); /* Center the element */
    width: 96%;
    max-width: 960px; /* Constrain width on large screens */
    z-index: 1000;
    margin-top: 20px; /* Create floating space */

    /* --- Glassmorphism Effect MATCHING the Hero Button --- */
    background: rgba(var(--rgb-primary), 0.20); /* Using the button's color scheme */
    backdrop-filter: blur(10px); /* Matching blur effect */
    -webkit-backdrop-filter: blur(10px);

    /* --- Rounded Corners & Border MATCHING the Hero Button --- */
    border-radius: 10px; /* Matching the button's border radius */
    border: 1px solid rgba(255, 255, 255, 0.2); /* Matching the button's border */
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2); /* Soft shadow for depth */

    /* --- Animation --- */
    transition: top 0.4s ease-in-out;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
    width: 100%;
    padding: 0 20px; /* Added a bit more horizontal padding */
}

/* Light theme style for the main nav bar */
[data-theme="light"] #main-nav {
    background-color: rgba(255, 255, 255, 0.7); /* Lighter glass for light mode */
    border: 1px solid rgba(0, 0, 0, 0.1);
}

#main-nav.visible {
    top: 0; /* Animate into view */
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-logo a {
    color: var(--current-text-dark);
    text-decoration: none;
    font-family: var(--font-family-serif);
    font-weight: 600;
    font-size: 1.1rem;
    transition: color 0.3s ease;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-links a {
    color: var(--current-text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--current-text-light);
}

/* --- RESTORED ORIGINAL .nav-button STYLES --- */
.nav-button {
    position: relative;
    overflow: hidden;
    background: rgba(var(--rgb-primary), 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #ffffff;
    padding: 5px 10px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    z-index: 1;
    transition: transform 0.2s ease-out, box-shadow 0.3s ease-out;
}

.nav-button::before {
    content: '';
    position: absolute;
    z-index: -1;
    left: var(--mouse-x);
    top: var(--mouse-y);
    width: 100px;
    height: 100px;
    background-image: radial-gradient(
        circle,
        rgba(var(--rgb-primary), 0.5) 0%,
        rgba(var(--rgb-primary), 0) 80%
    );
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.4s ease-out;
}

.nav-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(var(--rgb-primary), 0.2);
}

.nav-button:hover::before {
    opacity: 1;
}

.nav-links a.active {
    color: var(--primary-color);
    font-weight: 700;
}

/* --- Theme Toggle Button --- */
.theme-toggle {
    background: none;
    border: none;
    color: var(--current-text-dark);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background-color: var(--current-highlight-bg);
    transform: scale(1.1);
}

.theme-toggle .fa-sun {
    display: none;
}

[data-theme="light"] .theme-toggle .fa-moon {
    display: none;
}

[data-theme="light"] .theme-toggle .fa-sun {
    display: block;
}

/* --- Theme Toggle Button: Divider and Margin --- */
.theme-toggle {
    margin-left: 18px;
    border-left: 1px solid var(--current-border-color);
    padding-left: 12px;
    padding-right: 12px;
}
.theme-toggle::before {
    content: '';
    position: absolute;
    left: 0;
    top: 20%;
    bottom: 20%;
    width: 1px;
    background: var(--current-border-color);
}

/* --- Mobile Navigation --- */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 4px;
    z-index: 1001;
}

.mobile-nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--current-text-dark);
    transition: all 0.3s ease;
    border-radius: 2px;
}

.mobile-nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.mobile-nav-menu {
    display: block; /* Use block and control visibility with opacity and transform */
    position: fixed;
    top: 80px;      /* Adjust this value to create space from the top nav bar */
    left: 5%;       /* Position from the left edge of the screen */
    width: 90%;     /* Make it narrower than the screen width */
    z-index: 999;

    /* --- Glassmorphism Effect --- */
    background-color: rgba(22, 27, 34, 0.8);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);

    /* --- Rounded Corners & Border --- */
    border-radius: 18px; /* This creates the rounded angles */
    border: 1px solid rgba(120, 93, 254, 0.25);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);  /* Soft shadow for a floating effect */

    /* --- Animation --- */
    opacity: 0; /* Start hidden */
    pointer-events: none; /* Prevent clicks when hidden */
    transform: translateY(-20px) scale(0.95); /* Start slightly up and smaller */
    transition: transform 0.3s ease, opacity 0.3s ease;
    overflow: hidden; /* Ensures the content respects the rounded corners */
}

[data-theme="light"] .mobile-nav-menu {
    background-color: rgba(255, 255, 255, 0.8); /* Light, semi-opaque background */
    border: 1px solid rgba(0, 0, 0, 0.1); /* Subtle dark border for definition */
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1); /* Lighter shadow for light mode */
}

/* Style for when the menu is active/visible */
.mobile-nav-menu.active {
    opacity: 1;
    pointer-events: auto; /* Allow clicks when visible */
    transform: translateY(0) scale(1); /* Animate to its final position */
}

/* --- Links inside the menu --- */
.mobile-nav-links {
    list-style: none;
    padding: 10px; /* Add some padding inside the menu */
    margin: 0;
}

.mobile-nav-links a {
    display: block;
    padding: 12px 20px;
    color: var(--current-text-dark);
    text-decoration: none;
    font-weight: 500;
    border-radius: 12px; /* Round the corners of the links as well */
    transition: background-color 0.2s ease, color 0.2s ease;
    border-bottom: none; /* Remove the old border */
}

.mobile-nav-links a:hover {
    background-color: rgba(120, 93, 254, 0.25); /* Stronger purple on hover */
    color: #fff; /* Brighter text color on hover */
    padding-left: 20px; /* Keep the padding consistent */
}

.mobile-nav-links a:last-child {
    border-bottom: none;
}

/* --- 4. HERO SECTION --- */
#hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    background-image: url('hero-background.jpg');
    background-position: center;
    background-size: 130%;
    background-repeat: no-repeat;
    text-align: center;
    background-attachment: fixed;
    overflow: hidden;
}

#hero::before {
    content: '';
    position: absolute;
    background: linear-gradient(to top, rgba(13, 17, 23, 0.8), rgba(13, 17, 23, 0.2));
    inset: 0;
    z-index: 1;
    pointer-events: none;
}

.hero-content-container,
.hero-text,
.contact-links {
    position: relative;
    z-index: 2;
}

.hero-content-container {
    text-align: center;
}

h1 { 
    font-family: var(--font-family-serif);
    font-size: 2.2rem;
    line-height: 1.2;
    color: #ffffff;
    margin-bottom: 20px;
    font-weight: 500;
    text-align: center;
    text-shadow: 0px 4px 15px rgba(0, 0, 0, 0.3);
    white-space: nowrap;
}

#hero h1 {
  font-size: 2.8rem;
}

.hero-subtitle { 
    color: #e2e8f0;
    font-family: var(--font-family-sans);
    font-size: clamp(1.1rem, 3vw, 2rem);
    line-height: 1.5;
    margin-bottom: 35px;
    font-weight: 400;
    text-shadow: 0px 2px 10px rgba(0, 0, 0, 0.3);
    white-space: nowrap;
}

.contact-links { 
    display: flex;
    flex-wrap: nowrap;
    gap: 15px; 
    justify-content: center;
    white-space: nowrap;
}

.hero-text {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* --- BUTTON STYLES --- */
.button-primary,
.button-secondary {
    padding: 10px 24px;
    border-radius: 10px;
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    transition: transform 0.2s ease-out, background 0.2s ease-out, border-color 0.2s ease-out;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid;
}

.button-primary {
    background: rgba(var(--rgb-primary), 0.25);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.2);
}

.button-primary:hover {
    background: rgba(var(--rgb-primary), 0.4);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.button-secondary {
    background: rgba(13, 17, 23, 0.3);
    color: #ffffff;
    border-color: rgba(var(--rgb-primary), 0.25);
}

.button-secondary:hover {
    background: rgba(13, 17, 23, 0.5);
    border-color: rgba(var(--rgb-primary), 0.4);
    transform: translateY(-2px);
}

/* --- SCROLL DOWN INDICATOR --- */
.scroll-down-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.5rem;
    animation: flow 2.5s infinite cubic-bezier(0.65, 0, 0.35, 1); 
    z-index: 5;
}

@keyframes flow {
    0% {
        transform: translateX(-50%) translateY(0);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translateX(-50%) translateY(20px);
        opacity: 0;
    }
}


/* --- 5. CONTENT SECTIONS --- */
#experience,
#publications,
#skills-education {
    padding: 80px 0;
    position: relative;
    background-color: var(--current-bg-dark);
    transition: background-color 0.3s ease;
}

#publications {
    border-top: 1px solid var(--current-border-color);
}

.timeline { 
    border-left: 3px solid var(--current-border-color); 
    padding-left: 40px; 
    position: relative;
}

.timeline-item { 
    position: relative; 
    margin-bottom: 50px;
}
.timeline-item:last-child { 
    margin-bottom: 0; 
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: -49px;
    top: 5px;
    width: 15px;
    height: 15px;
    background-color: var(--current-bg-light);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
}


.timeline-content h3 { 
    font-family: var(--font-family-sans); 
    font-size: 1.4rem; 
    font-weight: 700; 
    margin-bottom: 5px; 
}
.timeline-meta { 
    color: var(--current-text-light); 
    margin-bottom: 15px; 
    font-size: 0.9rem; 
}
.timeline-content ul { 
    padding-left: 20px; 
}
.timeline-role {
    margin-top: 25px;
    padding-left: 15px;
    border-left: 2px solid var(--current-border-color);
}
.timeline-role h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 2px;
}
.timeline-role-meta {
    font-size: 0.9rem;
    color: var(--current-text-light);
    margin-bottom: 10px;
}

.publication-card {
    background: var(--current-bg-light);
    border: 1px solid var(--current-border-color);
    border-radius: 8px;
    margin-bottom: 30px;
    padding: 30px;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.publication-card.featured { 
    border-left: 5px solid var(--primary-color); 
}
.publication-tag {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 15px;
}
.publication-card h3 { 
    font-size: 1.4rem; 
    margin-bottom: 10px; 
}
.publication-meta { 
    font-size: 1rem; 
    color: var(--current-text-light); 
    margin-bottom: 20px; 
}
.contribution-highlight {
    background-color: var(--current-highlight-bg);
    border-left: 3px solid var(--secondary-color);
    padding: 15px 20px;
    margin: 20px 0;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}
.contribution-highlight ul { 
    padding-left: 20px; 
}
/* Publication Status Badge */
.publication-status-badge {
    display: inline-block;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

[data-theme="light"] .publication-status-badge {
    background-color: rgba(var(--rgb-primary), 0.1);
}

.publication-links { 
    display: flex; 
    gap: 20px; 
    margin-top: 20px; 
}
.publication-links a { 
    font-weight: 600; 
    text-decoration: none; 
    color: var(--primary-color); 
}
.publication-links a:hover { 
    text-decoration: underline; 
}

.timeline-item, .publication-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.timeline-item:hover, .publication-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(120, 93, 254, 0.08), 0 1.5px 6px rgba(0,0,0,0.06);
    background-color: var(--hover-bg, rgba(120, 93, 254, 0.06));
    transition: background 0.3s, box-shadow 0.3s, transform 0.3s;
}

.skills-education-grid { 
    display: grid; 
    grid-template-columns: 1.5fr 1fr; 
    gap: 60px; 
}
.skills-column h2, .education-column h2 { 
    text-align: left; 
    font-size: 1.8rem; 
}
.skills-column h2::after, .education-column h2::after { 
    margin: 15px 0 0; 
}
.skill-category {
    margin-bottom: 30px;
}
.skill-category h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--current-text-dark);
    margin-bottom: 15px;
    border-bottom: 1px solid var(--current-border-color);
    padding-bottom: 8px;
}
.skills-grid { 
    display: flex; 
    flex-wrap: wrap; 
    gap: 10px; 
}
.skill-badge { 
    background-color: var(--current-border-color); 
    color: var(--current-text-dark);
    padding: 6px 14px; 
    border-radius: 16px; 
    font-size: 0.9rem; 
    font-weight: 500; 
    transition: background-color 0.3s ease, color 0.3s ease;
}
.skill-badge.primary {
    background-color: var(--primary-color);
    color: #ffffff;
    font-weight: 600;
}
.education-item { 
    margin-bottom: 20px; 
}
.education-item h3 { 
    font-size: 1.1rem; 
    font-weight: 700; 
    margin-bottom: 0; 
}
.education-item p { 
    color: var(--current-text-light); 
}
.education-detail { font-size: 0.9em; color: #666; margin-top: 5px; }
[data-tooltip] {
    position: relative;
    cursor: help;
}
[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--current-bg-dark);
    color: var(--current-text-dark);
    border: 1px solid var(--current-border-color);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 0.85rem;
    font-weight: 400;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 10;
}
[data-tooltip]:hover::after {
    opacity: 1;
}

/* --- 6. FOOTER --- */
#footer {
    padding: 30px 0;
    position: relative;
    background-color: var(--current-bg-light);
    border-top: 1px solid var(--current-border-color);
    text-align: center;
    color: var(--current-text-light);
    font-size: 0.9rem;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

/* --- 7. ANIMATIONS --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Section Spacing --- */
#experience, #publications, #skills-education {
    margin-bottom: 80px;
}

/* --- Fade-in/Slide-in Animations for Sections --- */
.section-fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.19, 1, 0.22, 1), transform 0.8s cubic-bezier(0.19, 1, 0.22, 1);
}
.section-fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Subtle Hero Gradient --- */
/* Removed conflicting background-image declaration to preserve parallax effect */

/* --- Interactive Element Hover/Focus States --- */
.button-primary:hover, .button-secondary:hover, .nav-button:hover, .theme-toggle:hover, .mobile-nav-toggle:hover {
    filter: brightness(1.08);
    box-shadow: 0 2px 8px rgba(120,93,254,0.10);
}

.button-primary:focus, .button-secondary:focus, .nav-button:focus, .theme-toggle:focus, .mobile-nav-toggle:focus {
    filter: brightness(1.12);
    box-shadow: 0 0 0 3px rgba(120,93,254,0.18);
}

/* --- Card and Timeline Item Border Radius --- */
.timeline-item, .publication-card {
    border-radius: 14px;
    overflow: hidden;
}

/* --- 9. RESPONSIVE DESIGN --- */
@media (max-width: 900px) {
    .skills-education-grid { 
        grid-template-columns: 1fr; 
    }
}

@media (max-width: 768px) {
    h1, .hero-subtitle {
    white-space: normal;
    word-break: break-word;
    }
    h2 { font-size: 1.8rem; margin-bottom: 40px; }
    
    /* Mobile Navigation */
    .desktop-nav { display: none; }
    .mobile-nav-toggle { display: flex; }
    .mobile-nav-menu { display: block;
        background-color: rgba(22, 27, 34, 0.95); }
    #main-nav {
        width: 90%;
        max-width: 400px;
        left: 5%;
        transform: none;
        background-color: rgba(22, 27, 34, 0.95);
    }
    [data-theme="light"] #main-nav {
        background-color: rgba(255, 255, 255, 0.90);
    }
    [data-theme="light"] .mobile-nav-menu {
        /* Increased opacity for light mode */
        background-color: rgba(255, 255, 255, 0.9);
    }
    .contact-links {
        flex-direction: column;
        align-items: center;
        width: 100%;
        max-width: 300px;
        margin-left: auto;
        margin-right: auto;
    }
    .button-primary, .button-secondary {
        width: 100%;
    }
    .timeline-item .timeline-content h3, .publication-card h3 {
        font-size: 1.25rem;
        line-height: 1.4;
    }
    .publication-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

@media (max-width: 600px) {
    h1 { font-size: 2.5rem; }
    .nav-container {
      flex-direction: row;
      justify-content: space-between;
      align-items: center;
      height: 60px;
    }
    .nav-logo {
      flex: 0 1 auto;
      min-width: 0;
    }
    .nav-actions {
      flex: 0 1 auto;
      min-width: 0;
      gap: 12px;
    }
}

@media (orientation: portrait) {
    #hero {
        background-image: url('hero-background-portrait.jpg');
    }
}

html, body {
    margin: 0;
    padding: 0;
    max-width: 100vw;
    overflow-x: hidden;
}

/* --- GLOBAL FONT SIZE REDUCTION & LESS DENSE LAYOUT --- */
html { font-size: 15px; }
body, p, li, .skill-badge { font-size: 0.95rem; }
h1 { font-size: 2.2rem; margin-bottom: 16px; }
h2 { font-size: 1.5rem; margin-bottom: 32px; }
h3 { font-size: 1.1rem; margin-bottom: 10px; }
.skill-badge { padding: 4px 10px; font-size: 0.95rem; }
.skill-category { margin-bottom: 18px; }
.skills-grid { gap: 6px; }
.container { max-width: 900px; width: 96%; }
#experience, #publications, #skills-education { padding: 48px 0; margin-bottom: 48px; }
.section-fade-in { transition: opacity 0.6s, transform 0.6s; }