:root {
    --bg-color: #ffffff;
    --text-color: #212529;
    --section-bg-light: #f8f9fa;
    --card-bg: #ffffff;
    --card-shadow: rgba(0,0,0,0.1);
    --navbar-bg: #212529;
    --footer-bg: #212529;
    --footer-text: #ffffff;
    --hero-overlay: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.9));
}

body.dark-mode {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --section-bg-light: #1e1e1e;
    --card-bg: #2a2a2a;
    --card-shadow: rgba(255,255,255,0.1);
    --navbar-bg: #1c1c1c;
    --footer-bg: #1c1c1c;
    --footer-text: #e0e0e0;
    --hero-overlay: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 1));
}

/* Preloader */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(13, 110, 253, 0.3);
    border-top-color: #0d6efd;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

body.dark-mode .spinner {
    border-color: rgba(13, 202, 240, 0.3);
    border-top-color: var(--bs-info);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.hidden-content {
    display: none;
}


/* Global */
html {
    scroll-behavior: smooth;
}

body {
    padding-top: 56px;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    cursor: none;
}

section {
    padding: 60px 0;
}

#about, #contact {
    background-color: var(--bg-color);
}

#projects {
    background-color: var(--section-bg-light);
}

/* Navbar */
.navbar {
    background-color: transparent !important;
    transition: background-color 0.3s ease-in-out;
}

.navbar-scrolled {
    background-color: rgba(33, 37, 41, 0.85) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

body:not(.dark-mode) .navbar:not(.navbar-scrolled) .nav-link,
body:not(.dark-mode) .navbar:not(.navbar-scrolled) .navbar-brand,
body:not(.dark-mode) .navbar:not(.navbar-scrolled) .navbar-toggler-icon {
    color: var(--text-color) !important;
    --bs-navbar-toggler-icon-bg: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(33, 37, 41, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
body:not(.dark-mode) .navbar:not(.navbar-scrolled) {
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

body.dark-mode .navbar-scrolled {
    background-color: rgba(28, 28, 28, 0.85) !important;
}

/* Hero Section */
#hero {
    height: 80vh;
    background: var(--hero-overlay), url('https://source.unsplash.com/random/1920x1080?code,technology') no-repeat center center/cover;
}

#hero h1 {
    font-size: 3.5rem;
    font-weight: bold;
}

/* Skills Icons */
.skill-item {
    text-align: center;
}
.skill-item i {
    font-size: 4rem;
    transition: transform 0.2s ease;
}
.skill-item i:hover {
    transform: scale(1.2);
}

/* Project Cards */
.project-card {
    background-color: var(--card-bg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: none;
    border-radius: 10px;
    color: var(--text-color);
}
.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px var(--card-shadow);
}
.project-card .card-body {
    /* min-height and flex properties removed for natural flow with image */
}

/* Typing Animation */
.lead .cursor {
    display: inline-block;
    background-color: var(--text-color);
    margin-left: 2px;
    width: 4px;
    animation: blink 1s infinite;
}
body.dark-mode .lead .cursor {
    background-color: white;
}

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

/* Contact & Footer */
#contact .btn-dark {
    background-color: var(--text-color);
    border-color: var(--text-color);
}
#contact .btn {
    font-size: 1.2rem;
    padding: 10px 20px;
    transition: transform 0.2s ease;
}
#contact .btn:hover {
    transform: scale(1.1);
}

.main-footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
}

.social-link {
    color: var(--footer-text);
    font-size: 1.5rem;
    margin: 0 0.5rem;
    transition: color 0.3s ease, transform 0.3s ease;
    display: inline-block;
}

.social-link:hover {
    color: var(--bs-primary);
    transform: translateY(-3px);
}

body.dark-mode .social-link:hover {
    color: var(--bs-info);
}


/* Theme Switcher */
.theme-switcher-label {
    width: 30px; /* Slightly larger for easier clicking */
    height: 30px;
    cursor: pointer;
    position: relative;
    display: flex; /* Use flexbox for centering */
    justify-content: center;
    align-items: center;
}

.theme-switcher-label input {
    display: none;
}

.theme-switcher-icon {
    position: absolute;
    font-size: 1.2rem; /* Adjusted size */
    transition: transform 0.4s ease, opacity 0.4s ease;
}

.theme-switcher-icon.sun {
    color: #ffc107; /* Sun color */
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

.theme-switcher-icon.moon {
    color: #87ceeb; /* Moon color */
    opacity: 0;
    transform: scale(0) rotate(-90deg);
}

body.dark-mode .theme-switcher-icon.sun {
    opacity: 0;
    transform: scale(0) rotate(90deg);
}

body.dark-mode .theme-switcher-icon.moon {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

body:not(.dark-mode) .navbar:not(.navbar-scrolled) .theme-switcher-icon.sun {
    color: var(--text-color);
}



/* Scroll-to-Top Button */
#scroll-to-top-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background-color: #0d6efd;
    color: white;
    border-radius: 50%;
    text-align: center;
    font-size: 2rem;
    line-height: 50px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    z-index: 1000;
}

#scroll-to-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

#scroll-to-top-btn:hover {
    transform: scale(1.1);
}

/* Project Modal */
.project-modal {
    border: none;
    border-radius: 10px;
    box-shadow: 0 0 30px rgba(0,0,0,0.2);
    padding: 2rem;
    width: 80%;
    max-width: 800px;
    background-color: var(--card-bg);
    color: var(--text-color);
}

.project-modal::backdrop {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.project-modal .modal-content {
    position: relative;
}

.project-modal h2 {
    margin-bottom: 1rem;
    color: var(--bs-primary);
}

body.dark-mode .project-modal h2 {
     color: var(--bs-info);
}

.project-modal .close-modal-btn {
    position: absolute;
    top: -1.5rem;
    right: -1rem;
    background: none;
    border: none;
    font-size: 2.5rem;
    color: var(--text-color);
    cursor: pointer;
}

.project-modal[open] {
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Contact Form */
#contact-form .form-control {
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--text-color);
}

#contact-form .form-control:focus {
    background-color: var(--bg-color);
    color: var(--text-color);
    border-color: #86b7fe;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

#contact-form .form-floating>label {
    color: var(--text-color);
}

#contact-form .form-control.is-invalid {
    border-color: #dc3545;
}

#contact-form .form-control.is-valid {
    border-color: #198754;
}

/* Custom Cursor */
.cursor-dot,
.cursor-outline {
    pointer-events: none;
    position: fixed;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    opacity: 1;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease-in-out, transform 0.2s ease-in-out;
    z-index: 1051; /* High z-index to be on top of everything */
}

.cursor-dot {
    width: 8px;
    height: 8px;
    background-color: #0d6efd;
}

body.dark-mode .cursor-dot {
    background-color: var(--bs-info);
}

.cursor-outline {
    width: 40px;
    height: 40px;
    border: 2px solid #0d6efd;
    transition: width 0.3s, height 0.3s, border-color 0.3s;
}

body.dark-mode .cursor-outline {
    border-color: var(--bs-info);
}

.cursor-outline.grow {
    width: 60px;
    height: 60px;
    border: 2px solid #0dcaf0;
    background-color: rgba(13, 202, 240, 0.2);
}

/* Scroll-triggered Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered animation for children of an element with .stagger-children */
.stagger-children .fade-in-up {
    transition-delay: calc(var(--stagger-index) * 100ms);
}

/* Project Filtering */
#project-filters .btn {
    margin: 0 5px;
    transition: all 0.3s ease;
}

#project-filters .btn.active {
    background-color: var(--bs-primary);
    color: white;
    border-color: var(--bs-primary);
}

body.dark-mode #project-filters .btn.active {
     background-color: var(--bs-info);
     border-color: var(--bs-info);
     color: #121212;
}

body.dark-mode #project-filters .btn {
    color: var(--text-color);
    border-color: var(--text-color);
}

.project-item {
    transition: transform 0.4s ease, opacity 0.4s ease;
}

.project-item.hidden {
    transform: scale(0.8);
    opacity: 0;
    display: none;
}
.profile-picture-container {
    width: 250px; /* ou la taille que vous préférez */
    height: 250px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto; /* Pour le centrer si la colonne est plus large */
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    border: 5px solid #fff;
    background-color: #eee; /* Couleur de fond si l'image n'est pas là */
}

.profile-picture-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

body.dark-mode .profile-picture-container {
    border-color: #2a2a2a;
    background-color: #333;
}