first commit

frontend/app/css/globals.css

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+/* Reset léger et bases */
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
+html, body {
+  height: 100%;
+}
+
+body {
+  margin: 0;
+  background: var(--color-bg, #ffffff);
+  color: var(--color-text, #1f2937);
+  min-height: 100svh;
+  padding-top: var(--header-height, 80px); /* espace pour le header fixe */
+    transition: background-color 0.25s ease, color 0.25s ease;
+  transition: background-color 0.25s ease, color 0.25s ease;
+}
+
+/* Images fluides */
+img, svg, video {
+  max-width: 100%;
+  height: auto;
+  display: block;
+}
+
+/* Mise en page commune */
+main {
+  display: block;
+}
+
+.container {
+  max-width: var(--container-max, 1100px);
+  margin-inline: auto;
+  padding-inline: min(5vw, var(--space-6, 1.5rem));
+}
+
+.section {
+  padding-block: var(--space-16, 4rem) var(--space-12, 3rem);
+}
+
+.hero {
+  background: var(--color-surface, #ffffff);
+  border-bottom: 1px solid var(--color-border, #efefef);
+  box-shadow: inset 0 -6px 0 var(--color-accent-50, #fff4ec);
+  padding-block: var(--space-16, 4rem);
+}
+
+.hero h2 {
+  margin: 0 0 var(--space-2, 0.5rem);
+}
+
+.hero p {
+  margin: 0;
+  max-width: 60ch;
+  color: var(--color-muted, #6b7280);
+}
+
+/* Footer minimal */
+footer {
+  background: var(--color-bg, #ffffff);
+  border-top: 1px solid var(--color-border, #efefef);
+  margin-top: var(--space-16, 4rem);
+  padding: var(--space-6, 1.5rem) min(5vw, var(--space-6, 1.5rem));
+  color: var(--color-muted, #6b7280);
+  text-align: center;
+}
+
+/* Accessibilité et confort */
+:focus-visible {
+  outline: 2px solid var(--color-accent, #ff6b35);
+  outline-offset: 2px;
+  border-radius: var(--radius-sm, 6px);
+}
+
+/* Sélection de texte en orange doux */
+::selection {
+  background: var(--color-accent-100, #ffe4d6);
+  color: var(--color-text, #1f2937);
+}
+
+/* Scroll fluide + offset pour header fixe */
+html {
+  scroll-behavior: smooth;
+  color-scheme: light;
+}
+
+html[data-theme="dark"] {
+  color-scheme: dark;
+  color-scheme: light;
+}
+
+html[data-theme="dark"] {
+  color-scheme: dark;
+}
+
+/* Tout élément ciblé par un id laissera la place au header */
+[id] {
+  scroll-margin-top: calc(var(--header-height, 80px) + 12px);
+}
+
+/* Séparateur horizontal discret */
+hr {
+  border: 0;
+  height: 1px;
+  background: var(--color-border, #efefef);
+  margin: var(--space-8, 2rem) 0;
+}
+
+/* Variantes de section */
+.section--alt {
+  background: var(--color-accent-50, #fff4ec);
+  border-top: 1px solid var(--color-border, #efefef);
+  border-bottom: 1px solid var(--color-border, #efefef);
+}
+
+.lead {
+  font-size: 1.125rem;
+  color: var(--color-muted, #6b7280);
+}
+
+/* Fin: préférences de mouvement */
+@media (prefers-reduced-motion: reduce) {
+  * {
+    animation: none !important;
+    transition: none !important;
+    scroll-behavior: auto !important;
+  }
+}