* {
    box-sizing: border-box;
}

:root {
    --blue-dark: #073b7a;
    --blue: #0b66c3;
    --blue-light: #3b9cff;
    --blue-soft: #eaf4ff;
    --blue-border: #c7ddf3;
    --text: #102a43;
    --muted: #627d98;
    --white: #ffffff;
    --background: #eef7ff;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background: linear-gradient(135deg, #eef7ff, #d7ebff);
}

/* =========================
   ACCUEIL
   ========================= */

body > h1,
body > p,
body > a {
    margin-left: 30px;
}

body > h1 {
    padding-top: 30px;
    color: var(--blue-dark);
}

body > p {
    color: var(--muted);
}

/* =========================
   PAGES CENTRÉES
   ========================= */

.page-center {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* =========================
   CONNEXION
   ========================= */

.auth-card {
    width: 100%;
    max-width: 430px;
    padding: 35px;
    background: var(--white);
    border: 1px solid var(--blue-border);
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(7, 59, 122, 0.15);
}

.logo {
    text-align: center;
}

.logo-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    background: linear-gradient(135deg, var(--blue), var(--blue-light));
    color: white;
    font-size: 30px;
}

.logo h1 {
    margin: 0;
    color: var(--blue-dark);
}

.subtitle {
    margin: 10px 0 30px;
    text-align: center;
    color: var(--muted);
}

/* =========================
   BARRE DU HAUT
   ========================= */

.topbar {
    min-height: 70px;
    padding: 0 25px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    background: var(--blue-dark);
    color: white;
    box-shadow: 0 4px 15px rgba(7, 59, 122, 0.2);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: bold;
    white-space: nowrap;
}

.brand-icon {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--blue), var(--blue-light));
    color: white;
}

.topbar nav {
    display: flex;
    align-items: center;
    gap: 5px;
}

.topbar nav a {
    padding: 10px 13px;
    border-radius: 8px;
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.topbar nav a:hover,
.topbar nav a.active {
    background: rgba(255, 255, 255, 0.15);
    text-decoration: none;
}

/* =========================
   FORMULAIRES
   ========================= */

form {
    width: 100%;
}

label {
    display: block;
    margin: 15px 0 7px;
    font-weight: bold;
    color: var(--text);
}

input,
textarea,
select {
    width: 100%;
    padding: 13px;
    border: 1px solid var(--blue-border);
    border-radius: 10px;
    background: white;
    color: var(--text);
    font-family: inherit;
    font-size: 15px;
    outline: none;
}

textarea {
    resize: vertical;
    min-height: 180px;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--blue-light);
    box-shadow: 0 0 0 3px rgba(59, 156, 255, 0.15);
}

input:disabled {
    background: #f1f6fb;
    color: var(--muted);
}

/* =========================
   BOUTONS
   ========================= */

button {
    border: none;
    border-radius: 10px;
    padding: 12px 18px;
    background: linear-gradient(135deg, var(--blue), var(--blue-light));
    color: white;
    font-size: 15px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
}

button:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 15px rgba(11, 102, 195, 0.25);
}

.main-button {
    width: 100%;
    margin-top: 25px;
    padding: 14px;
}

/* =========================
   LIENS
   ========================= */

a {
    color: var(--blue);
    text-decoration: none;
    font-weight: bold;
}

a:hover {
    text-decoration: underline;
}

.back-link {
    display: block;
    margin-top: 25px;
    text-align: center;
}

/* =========================
   MESSAGERIE
   ========================= */

.mail-layout {
    min-height: calc(100vh - 70px);
    display: flex;
}

/* Barre latérale */

.sidebar {
    width: 250px;
    padding: 25px 18px;
    background: white;
    border-right: 1px solid var(--blue-border);
}

.compose-button {
    width: 100%;
    margin-bottom: 25px;
    padding: 14px;
}

.folder {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 5px;
    padding: 13px;
    border-radius: 10px;
    color: var(--text);
    cursor: pointer;
}

.folder:hover,
.folder.active {
    background: var(--blue-soft);
    color: var(--blue);
}

.folder span:first-child {
    font-size: 19px;
}

/* Contenu */

.mail-content {
    flex: 1;
    padding: 35px;
    min-width: 0;
}

.mail-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 25px;
}

.mail-header h1 {
    margin: 0;
    color: var(--blue-dark);
}

.mail-header p {
    margin: 7px 0 0;
    color: var(--muted);
}

.refresh-button {
    background: white;
    border: 1px solid var(--blue-border);
    color: var(--blue);
}

/* Liste des mails */

.mail-list {
    min-height: 350px;
    background: white;
    border: 1px solid var(--blue-border);
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(7, 59, 122, 0.08);
}

.empty-mail {
    min-height: 350px;
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.empty-icon {
    font-size: 50px;
    margin-bottom: 10px;
}

.empty-mail h2 {
    margin: 5px 0;
    color: var(--blue-dark);
}

.empty-mail p {
    margin: 5px 0;
    color: var(--muted);
}

.empty-mail .main-button {
    width: auto;
    min-width: 190px;
}

/* =========================
   COMPOSITION
   ========================= */

.compose-page {
    min-height: calc(100vh - 70px);
    padding: 35px;
}

.compose-card {
    width: 100%;
    max-width: 850px;
    margin: 0 auto;
    padding: 35px;
    background: white;
    border: 1px solid var(--blue-border);
    border-radius: 18px;
    box-shadow: 0 10px 30px rgba(7, 59, 122, 0.1);
}

.compose-title h1 {
    margin: 0;
    color: var(--blue-dark);
}

.compose-title p {
    margin: 7px 0 25px;
    color: var(--muted);
}

.attachment-box {
    margin-top: 20px;
    padding: 15px;
    border: 1px dashed var(--blue-border);
    border-radius: 10px;
    background: var(--blue-soft);
}

.attachment-box label {
    margin-top: 0;
}

.attachment-box p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.compose-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 25px;
}

.compose-actions .main-button {
    width: auto;
    margin-top: 0;
}

/* =========================
   PARAMÈTRES
   ========================= */

.settings-page {
    min-height: calc(100vh - 70px);
    padding: 35px;
}

.settings-card {
    width: 100%;
    max-width: 750px;
    margin: 0 auto;
    padding: 35px;
    background: white;
    border: 1px solid var(--blue-border);
    border-radius: 18px;
    box-shadow: 0 10px 30px rgba(7, 59, 122, 0.1);
}

.settings-title h1 {
    margin: 0;
    color: var(--blue-dark);
}

.settings-title p {
    margin: 7px 0 30px;
    color: var(--muted);
}

.settings-section {
    padding: 25px 0;
    border-top: 1px solid var(--blue-border);
}

.settings-section h2 {
    margin-top: 0;
    color: var(--blue-dark);
}

.settings-section .main-button {
    max-width: 180px;
}

.settings-actions {
    padding-top: 25px;
    border-top: 1px solid var(--blue-border);
}

/* =========================
   MOBILE
   ========================= */

@media (max-width: 800px) {

    .topbar {
        padding: 15px;
        flex-direction: column;
        align-items: stretch;
    }

    .brand {
        justify-content: center;
    }

    .topbar nav {
        justify-content: center;
        flex-wrap: wrap;
    }

    .mail-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--blue-border);
    }

    .mail-content,
    .compose-page,
    .settings-page {
        padding: 20px;
    }

    .mail-header {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 600px) {

    .auth-card,
    .compose-card,
    .settings-card {
        padding: 25px 20px;
        border-radius: 16px;
    }

    body > h1,
    body > p,
    body > a {
        margin-left: 20px;
        margin-right: 20px;
    }

    .compose-actions {
        flex-direction: column-reverse;
    }

    .compose-actions button {
        width: 100%;
    }

    .settings-section .main-button {
        max-width: none;
    }
}