/* Pastel Theme - sober but slightly childish for school */
:root {
    --primary-color: #ffb3ba; /* Pastel pink */
    --secondary-color: #bae1ff; /* Pastel blue */
    --tertiary-color: #baffc9; /* Pastel green */
    --quaternary-color: #ffffba; /* Pastel yellow */
    --bg-color: #faf9f7; /* Very light, warm, sober background */
    --card-bg: #ffffff;
    --text-color: #555555; /* Sober, legible text color */

    --header-bg: #a4c8e1;
    --header-overlay: rgba(255, 249, 230, 0.65);
    --header-text: #444;
    --header-subtext: #666;
    --header-text-shadow: 1px 1px 2px rgba(255,255,255,0.8);

    --nav-bg: var(--secondary-color);
    --nav-link: #3b5998;
    --nav-link-hover: #d8707a;
    --nav-link-hover-bg: #ffffff;

    --card-border: var(--secondary-color);
    --card-shadow: var(--secondary-color);
    --title-gradient-start: #a4c8e1;
    --title-gradient-end: #bae1ff;
    --title-text: #333;

    --btn-gradient-start: #baffc9;
    --btn-gradient-end: #99e6aa;
    --btn-shadow: #7ec58e;
    --btn-text: #444;

    --signature-color: #e58a93;
    --signature-shadow-1: #fff;
    --signature-shadow-2: var(--quaternary-color);

    --link-color: #5b8fb9;
    --dropdown-bg: #ffffff;
    --dropdown-hover-bg: #f0f7fc;
    --dots-opacity: 1;

    --toggle-bg: rgba(255, 255, 255, 0.85);
    --toggle-border: #ddd;
    --toggle-hover-bg: #fff;
}

[data-theme="dark"] {
    --bg-color: #12121e; /* Deep dark purple-ish blue background */
    --card-bg: #1e1e2f; /* Dark card background */
    --text-color: #e0e0e6; /* Soft off-white text */

    --header-bg: #181826; /* Darker blue header background */
    --header-overlay: rgba(18, 18, 28, 0.8); /* Dark overlay over the image */
    --header-text: #bae1ff; /* Pastel blue title */
    --header-subtext: #a0a8b9;
    --header-text-shadow: 1px 1px 3px rgba(0,0,0,0.6);

    --nav-bg: #1e1e2f; /* Darker nav background */
    --nav-link: #bae1ff; /* Pastel blue links */
    --nav-link-hover: #ffb3ba; /* Pastel pink on hover */
    --nav-link-hover-bg: #2d2d3f; /* Darker hover bg */

    --card-border: rgba(186, 225, 255, 0.2); /* Subtle pastel blue border */
    --card-shadow: rgba(186, 225, 255, 0.15);
    --title-gradient-start: #1c2b42; /* Dark pastel gradient for headers */
    --title-gradient-end: #141f30;
    --title-text: #bae1ff;

    /* Glow-in-the-dark buttons: vibrant pastel green button with dark text */
    --btn-gradient-start: #baffc9;
    --btn-gradient-end: #99e6aa;
    --btn-shadow: rgba(153, 230, 170, 0.4);
    --btn-text: #12121e;

    --signature-color: #ffb3ba; /* Pastel pink signature */
    --signature-shadow-1: #12121c;
    --signature-shadow-2: rgba(255, 255, 186, 0.3);

    --link-color: #bae1ff;
    --dropdown-bg: #1e1e2f;
    --dropdown-hover-bg: #2d2d3f;
    --dots-opacity: 0.15; /* Subtler dots in dark mode */

    --toggle-bg: #252538;
    --toggle-border: rgba(186, 225, 255, 0.2);
    --toggle-hover-bg: #2e2e42;
}

/* Theme Switcher Button styles */
.theme-toggle-btn {
    background-color: var(--toggle-bg);
    border: 1px solid var(--toggle-border);
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.15);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.theme-toggle-btn:hover {
    background-color: var(--toggle-hover-bg);
    transform: scale(1.08);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.theme-toggle-icon {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light mode icon: Sun (yellow circle with glow) */
[data-theme="light"] .theme-toggle-icon,
:root:not([data-theme="dark"]) .theme-toggle-icon {
    background-color: #f39c12;
    box-shadow: 0 0 0 2px #f39c12, 0 0 8px #f39c12;
}

/* Dark mode icon: Moon (crescent shadow) */
[data-theme="dark"] .theme-toggle-icon {
    background-color: transparent;
    box-shadow: inset -6px -6px 0px 0px #f1c40f;
}

/* Smooth transitions for themeable properties */
body, .haut, nav, .conteneur, .titre_clair, #bouton, a, .sous, .header-user-btn, .theme-toggle-btn {
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, color 0.3s ease, background-image 0.3s ease !important;
}

/* Element Styles overrides */
body {
    background-color: var(--bg-color) !important;
    background-image: radial-gradient(rgba(186, 225, 255, var(--dots-opacity)) 1.5px, transparent 1.5px) !important;
    background-size: 30px 30px !important;
    color: var(--text-color) !important;
}

.haut {
    background-color: var(--header-bg) !important;
    border-bottom: 6px solid var(--secondary-color) !important;
}

#haut h1 a {
    color: var(--header-text) !important;
    text-shadow: var(--header-text-shadow) !important;
}

#haut h2 {
    color: var(--header-subtext) !important;
}

nav {
    background-color: var(--nav-bg) !important;
    border-radius: 20px !important;
    margin: 10px auto !important;
    width: 95% !important;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05) !important;
}

nav a {
    color: var(--nav-link) !important;
    font-weight: 600 !important;
}

nav a:hover {
    background-color: var(--nav-link-hover-bg) !important;
    color: var(--nav-link-hover) !important;
    border-radius: 15px !important;
    border-bottom: none !important;
}

.conteneur {
    border-radius: 20px !important;
    border: 2px solid var(--card-border) !important;
    box-shadow: 5px 5px 0px var(--card-shadow) !important;
    background-color: var(--card-bg) !important;
}

.titre_clair {
    background: linear-gradient(135deg, var(--title-gradient-start), var(--title-gradient-end)) !important;
    color: var(--title-text) !important;
    border-radius: 15px 15px 0 0 !important;
    padding: 10px 15px !important;
    font-weight: bold !important;
}

#bouton {
    background: linear-gradient(135deg, var(--btn-gradient-start), var(--btn-gradient-end)) !important;
    border-radius: 30px !important;
    padding: 12px 25px !important;
    box-shadow: 0 4px 0 var(--btn-shadow) !important;
    border: none !important;
    color: var(--btn-text) !important;
    font-weight: bold !important;
}

#bouton:hover {
    transform: translateY(2px) !important;
    box-shadow: 0 2px 0 var(--btn-shadow) !important;
    background: linear-gradient(135deg, var(--btn-gradient-end), var(--btn-gradient-start)) !important;
}

.signature {
    color: var(--signature-color) !important;
    font-size: 2rem !important;
    text-shadow: 1px 1px 0px var(--signature-shadow-1), 2px 2px 0px var(--signature-shadow-2) !important;
}

#filrouge a {
    color: var(--link-color) !important;
    font-weight: 600 !important;
}

.sous {
    background-color: var(--dropdown-bg) !important;
    border: 2px solid var(--card-border) !important;
    border-radius: 15px !important;
    overflow: hidden !important;
}

.sous a:hover {
    background-color: var(--dropdown-hover-bg) !important;
}

/* Global tag overrides in dark mode for general body content compatibility */
[data-theme="dark"] a {
    color: var(--link-color) !important;
}
[data-theme="dark"] a:hover {
    color: var(--primary-color) !important;
}
[data-theme="dark"] h1 {
    color: var(--primary-color) !important;
}
[data-theme="dark"] h2 {
    color: var(--secondary-color) !important;
}
[data-theme="dark"] h3 {
    color: var(--tertiary-color) !important;
}
[data-theme="dark"] h4 {
    color: var(--text-color) !important;
}
[data-theme="dark"] #citation {
    color: var(--secondary-color) !important;
}
[data-theme="dark"] .item a {
    background-color: var(--card-bg) !important;
    border-color: var(--card-border) !important;
    color: var(--text-color) !important;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3) !important;
}
[data-theme="dark"] .item a:hover {
    background-color: var(--dropdown-hover-bg) !important;
    border-color: var(--secondary-color) !important;
    color: var(--text-color) !important;
    box-shadow: 0 8px 15px rgba(186, 225, 255, 0.2) !important;
}
[data-theme="dark"] .message {
    background-color: #1e1e2f !important;
    border-left-color: var(--secondary-color) !important;
    color: var(--text-color) !important;
}
[data-theme="dark"] .photo {
    background-color: var(--card-bg) !important;
    border-color: var(--card-border) !important;
    color: var(--text-color) !important;
}