:root {
    --sd-teal: #087f8c;
    --sd-teal-dark: #056270;
    --sd-navy: #123b49;
    --sd-ink: #17343d;
    --sd-muted: #637b82;
    --sd-bg: #eef5f6;
    --sd-card: rgba(255,255,255,.94);
    --sd-line: #d5e3e6;
    --sd-shadow: 0 18px 45px rgba(19,59,73,.10);
    --sd-radius: 22px;
}

html { min-height: 100%; background: var(--sd-bg); }
body,
body.theme-jour,
.theme-jour body {
    min-height: 100vh;
    margin: 0;
    color: var(--sd-ink) !important;
    background:
        radial-gradient(circle at 8% 0, rgba(68,184,181,.18), transparent 28rem),
        linear-gradient(180deg, #f8fbfb 0, var(--sd-bg) 52%, #e8f1f3 100%) fixed !important;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif !important;
    line-height: 1.45;
    -webkit-font-smoothing: antialiased;
}

body.theme-nuit,
.theme-nuit body {
    --sd-ink: #edf8f8;
    --sd-muted: #a4bec3;
    --sd-card: rgba(12,42,51,.94);
    --sd-line: #29515a;
    --sd-shadow: 0 22px 52px rgba(0,0,0,.3);
    color: var(--sd-ink) !important;
    background:
        radial-gradient(circle at 10% 0, rgba(23,131,142,.24), transparent 30rem),
        linear-gradient(180deg, #061b23 0, #082832 100%) fixed !important;
}

body > .container,
body > main,
.container {
    width: min(1100px, calc(100% - 28px)) !important;
    max-width: 1100px !important;
    box-sizing: border-box;
    margin: 24px auto !important;
}

.container:not(.messenger-window) {
    padding: clamp(17px, 3vw, 30px) !important;
    border: 1px solid rgba(255,255,255,.75) !important;
    border-radius: 28px !important;
    background: var(--sd-card) !important;
    box-shadow: var(--sd-shadow) !important;
}

.theme-nuit .container:not(.messenger-window) { border-color: var(--sd-line) !important; }

h1, h2, h3, .section-title {
    color: var(--sd-navy) !important;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif !important;
    letter-spacing: -.02em !important;
}
.theme-nuit h1, .theme-nuit h2, .theme-nuit h3, .theme-nuit .section-title { color: #f1fbfb !important; }
h1 { font-size: clamp(1.65rem, 4vw, 2.35rem) !important; line-height: 1.08; }
.section-title {
    margin: 26px 0 13px !important;
    padding: 0 !important;
    border: 0 !important;
    font-size: .78rem !important;
    font-weight: 800 !important;
    letter-spacing: .08em !important;
    text-transform: uppercase;
}

a { color: var(--sd-teal-dark); text-underline-offset: 3px; }
.theme-nuit a { color: #72d5d5; }

button, input, textarea, select { font: inherit !important; box-sizing: border-box; }
input[type="text"], input[type="password"], input[type="email"], input[type="date"], input[type="time"], input[type="number"], input[type="url"], textarea, select {
    min-height: 44px;
    padding: 10px 13px !important;
    color: var(--sd-ink) !important;
    border: 1px solid var(--sd-line) !important;
    border-radius: 13px !important;
    background: rgba(255,255,255,.9) !important;
    outline: none;
    transition: border-color .18s, box-shadow .18s;
}
.theme-nuit input[type="text"], .theme-nuit input[type="password"], .theme-nuit input[type="email"], .theme-nuit input[type="date"], .theme-nuit input[type="time"], .theme-nuit input[type="number"], .theme-nuit input[type="url"], .theme-nuit textarea, .theme-nuit select { background: #102f38 !important; }
input:focus, textarea:focus, select:focus { border-color: var(--sd-teal) !important; box-shadow: 0 0 0 4px rgba(8,127,140,.13) !important; }

button, .btn, .btn-submit, .btn-login, .btn-mini, .btn-activite, .btn-back, .action-btn {
    border: 0 !important;
    border-radius: 14px !important;
    background: linear-gradient(135deg, var(--sd-teal), var(--sd-teal-dark)) !important;
    color: white !important;
    box-shadow: 0 8px 18px rgba(8,127,140,.17);
    font-weight: 750 !important;
    text-decoration: none !important;
    text-transform: none !important;
    cursor: pointer;
    transition: transform .18s, box-shadow .18s, opacity .18s;
}
button:hover, .btn:hover, .btn-submit:hover, .btn-activite:hover { transform: translateY(-1px); box-shadow: 0 11px 24px rgba(8,127,140,.23); }
button:disabled { opacity: .45; cursor: default; transform: none; }
.btn-danger, button.danger, .delete-btn { background: #c94b55 !important; color: white !important; border-radius: 11px !important; }

.cards, .grid-activites, .posts-grid, .category-grid, .gallery-grid { gap: 15px !important; }
.card, .post-card, .category-card, .postit-box, .upload-zone, .nav-preview, .item-list, .defi-box, .user, .login-box {
    border: 1px solid var(--sd-line) !important;
    border-radius: var(--sd-radius) !important;
    background: var(--sd-card) !important;
    box-shadow: 0 9px 28px rgba(19,59,73,.065) !important;
}
.post-card, .category-card, .postit-box, .upload-zone, .item-list, .defi-box, .user { padding: 17px !important; }
.upload-zone { border-style: dashed !important; border-width: 2px !important; }
.upload-zone:hover, .upload-zone.dragover { border-color: var(--sd-teal) !important; background: rgba(8,127,140,.055) !important; }
.post-images img, .gallery-img-container, .gallery-item img { border: 0 !important; border-radius: 12px !important; box-shadow: none !important; }

.btn-activite {
    min-height: 76px;
    display: flex !important;
    align-items: center;
    justify-content: center;
    padding: 15px !important;
}

/* Grille de fonctionnalités façon app */
.sd-feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 13px;
    margin: 0 0 26px;
}
.sd-feature-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 9px;
    padding: 20px 15px;
    border: 1px solid var(--sd-line);
    border-radius: 20px;
    background: var(--sd-card);
    box-shadow: 0 9px 28px rgba(19,59,73,.065);
    color: inherit;
    text-decoration: none;
    transition: transform .18s, box-shadow .18s;
    min-height: 138px;
}
.sd-feature-card:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(19,59,73,.12); }
.sd-feature-icon {
    display: grid;
    place-items: center;
    width: 62px;
    height: 62px;
    border-radius: 19px;
    font-size: 34px;
    margin-bottom: 2px;
}
.sd-feature-title { font-size: 15px; font-weight: 800; color: var(--sd-navy); letter-spacing: -.01em; }
.theme-nuit .sd-feature-title { color: #f1fbfb; }
.sd-feature-subtitle { font-size: 11.5px; color: var(--sd-muted); line-height: 1.25; }
.sd-feature-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    display: inline-grid;
    place-items: center;
    min-width: 22px;
    height: 22px;
    padding: 0 7px;
    border-radius: 99px;
    background: #ef4545;
    color: #fff;
    font-size: 12px;
    font-weight: 800;
    box-shadow: 0 3px 8px rgba(239,69,69,.35);
}
@media (max-width: 420px) {
    .sd-feature-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

/* Login discret */
.discreet-login-hint {
    position: fixed;
    left: 50%;
    bottom: 8px;
    transform: translateX(-50%);
    padding: 10px 16px;
    color: var(--sd-muted);
    font-size: 15px;
    letter-spacing: .35em;
    opacity: .5;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    transition: opacity .2s;
    z-index: 40;
}
.discreet-login-hint:hover { opacity: 1; }
.footer-login-link { display: inline-block; margin-top: 14px; color: var(--sd-muted); font-size: 12px; letter-spacing: .2em; opacity: .5; cursor: pointer; text-decoration: none; user-select: none; -webkit-user-select: none; transition: opacity .2s; }
.footer-login-link:hover { opacity: 1; }
.login-modal {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
    background: rgba(6,27,35,.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}
.login-modal-card {
    width: min(360px, 100%);
    padding: 24px;
    border: 1px solid var(--sd-line);
    border-radius: 22px;
    background: var(--sd-card);
    box-shadow: var(--sd-shadow);
    color: var(--sd-ink);
    text-align: center;
}
.login-modal-title { font-size: 17px; font-weight: 800; color: var(--sd-navy); margin-bottom: 6px; }
.theme-nuit .login-modal-title { color: #f1fbfb; }
.login-modal-text { margin: 0 0 14px; font-size: 13px; color: var(--sd-muted); }
.login-modal form { display: flex; gap: 8px; }
.login-modal input[type="password"] { flex: 1; }
.login-modal button[type="submit"] {
    border: 0 !important;
    border-radius: 13px !important;
    padding: 0 18px;
    background: linear-gradient(135deg, var(--sd-teal), var(--sd-teal-dark)) !important;
    color: #fff !important;
    font-weight: 750;
    cursor: pointer;
}
.login-modal-error { margin: 12px 0 0; color: #d33; font-size: 13px; font-weight: 700; }
.login-modal-close {
    margin-top: 14px;
    background: none !important;
    color: var(--sd-muted) !important;
    box-shadow: none !important;
    font-weight: 600;
    cursor: pointer;
}
.theme-nuit .login-modal-card { background: rgba(12,42,51,.97); border-color: var(--sd-line); }
.postit { border: 0 !important; border-radius: 4px 18px 7px 13px !important; box-shadow: 0 12px 28px rgba(91,76,23,.16) !important; }
.nav-preview { overflow: hidden; background: var(--sd-card) !important; }

table { width: 100%; border-collapse: separate !important; border-spacing: 0; overflow: hidden; border: 1px solid var(--sd-line) !important; border-radius: 16px; background: var(--sd-card); }
th { background: rgba(8,127,140,.09) !important; color: var(--sd-navy) !important; font-size: .75rem; letter-spacing: .04em; text-transform: uppercase; }
.theme-nuit th { color: #eaf9f9 !important; }
th, td { padding: 11px 12px !important; border-color: var(--sd-line) !important; }

.header-links, .footer-links, .nav-links, .nav-header, .top {
    gap: 10px !important;
    align-items: center;
}
.header-links a, .footer-links a, .nav-links a, .top a, .btn-back-top {
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    padding: 7px 11px !important;
    border: 1px solid var(--sd-line) !important;
    border-radius: 11px !important;
    background: var(--sd-card) !important;
    color: var(--sd-teal-dark) !important;
    text-decoration: none !important;
}
.theme-nuit .header-links a, .theme-nuit .footer-links a, .theme-nuit .nav-links a, .theme-nuit .top a { color: #72d5d5 !important; }

.site-common-bar {
    padding: 8px 10px !important;
    border: 1px solid rgba(255,255,255,.7) !important;
    border-radius: 16px !important;
    background: rgba(255,255,255,.9) !important;
    box-shadow: 0 12px 34px rgba(19,59,73,.18) !important;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif !important;
}
.site-common-bar a { color: var(--sd-navy) !important; border-radius: 9px !important; }

@media (max-width: 720px) {
    body > .container, body > main, .container { width: min(100% - 16px, 1100px) !important; margin: 8px auto 18px !important; }
    .container:not(.messenger-window) { padding: 16px !important; border-radius: 22px !important; }
    .footer-links, .header-links { flex-wrap: wrap; justify-content: flex-start !important; text-align: left !important; }
    table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .post-images.single-photo img { width: 100% !important; height: auto !important; max-height: 60vh; }
    .site-common-bar { max-width: calc(100% - 28px); }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}