/* ============================================================================
   app.css — sistema Rekintsu (admin + aluno + instrutora)
   Tema dark com sotaque cyan/dourado.
   ============================================================================ */

:root {
    --a-bg:        #0B1220;
    --a-card:      #111827;
    --a-card-2:    #1F2937;
    --a-border:    #1F2937;
    --a-border-2:  #374151;
    --a-sidebar:   #0F172A;
    --a-text:      #F8FAFC;
    --a-muted:     #94A3B8;
    --a-muted-2:   #64748B;
    --a-primary:   #22d3ee;
    --a-primary-2: #67e8f9;
    --a-accent:    #DBA159;
    --a-accent-2:  #EFD780;
    --a-success:   #16a34a;
    --a-warning:   #d97706;
    --a-danger:    #dc2626;
    --a-radius:    10px;
    --a-radius-sm: 6px;
    --a-transition: 0.15s ease;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--a-bg);
    color: var(--a-text);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { color: var(--a-primary); text-decoration: none; }
a:hover { color: var(--a-primary-2); }

/* ===== LAYOUT ===== */
.adm-wrap { display: flex; min-height: 100vh; }

/* ===== SIDEBAR ===== */
.adm-sidebar {
    width: 230px;
    flex-shrink: 0;
    background: var(--a-sidebar);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 50;
    border-right: 1px solid var(--a-border);
    display: flex;
    flex-direction: column;
}
.adm-sidebar__brand {
    padding: 22px 20px 18px;
    border-bottom: 1px solid var(--a-border);
}
.adm-sidebar__logo {
    display: block;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--a-primary), var(--a-primary-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.adm-sidebar__sub {
    font-size: 0.7rem;
    color: var(--a-muted-2);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 2px;
}
.adm-nav { flex: 1; padding: 14px 10px; }
.adm-nav__group {
    font-size: 0.65rem;
    color: var(--a-muted-2);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 14px 10px 6px;
    font-weight: 700;
}
.adm-nav__item a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    color: var(--a-muted);
    text-decoration: none;
    border-radius: var(--a-radius-sm);
    transition: var(--a-transition);
    font-size: 0.875rem;
    font-weight: 500;
}
.adm-nav__item a:hover {
    background: rgba(255,255,255,0.04);
    color: var(--a-text);
}
.adm-nav__item.active a {
    background: linear-gradient(135deg, rgba(34,211,238,.18), rgba(103,232,249,.10));
    color: var(--a-primary-2);
    font-weight: 600;
}
.adm-sidebar__footer {
    padding: 14px 20px;
    border-top: 1px solid var(--a-border);
}
.adm-sidebar__footer a {
    color: var(--a-muted);
    font-size: 0.85rem;
    text-decoration: none;
}
.adm-sidebar__footer a:hover { color: var(--a-danger); }

/* ===== MAIN ===== */
.adm-main {
    margin-left: 230px;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== TOPBAR ===== */
.adm-topbar {
    height: 56px;
    background: var(--a-sidebar);
    border-bottom: 1px solid var(--a-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 40;
}
.adm-topbar__title { font-size: 0.95rem; font-weight: 600; color: var(--a-text); }
.adm-topbar__right { display: flex; align-items: center; gap: 14px; }
.adm-topbar__user { font-size: 0.85rem; color: var(--a-muted); }
.adm-topbar__role {
    display: inline-block;
    margin-left: 4px;
    padding: 2px 8px;
    background: rgba(219,161,89,0.18);
    color: var(--a-accent-2);
    border-radius: 999px;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.adm-topbar__logout {
    font-size: 0.8rem;
    color: var(--a-muted-2);
    padding: 6px 12px;
    border: 1px solid var(--a-border-2);
    border-radius: var(--a-radius-sm);
    text-decoration: none;
}
.adm-topbar__logout:hover { color: var(--a-danger); border-color: var(--a-danger); }

/* ===== CONTENT ===== */
.adm-content { padding: 28px 24px; flex: 1; }

/* ===== CARDS ===== */
.adm-card {
    background: var(--a-card);
    border: 1px solid var(--a-border);
    border-radius: var(--a-radius);
    margin-bottom: 16px;
    overflow: hidden;
}
.adm-card__header {
    padding: 14px 18px;
    border-bottom: 1px solid var(--a-border);
    display: flex; align-items: center; justify-content: space-between;
}
.adm-card__title { font-size: 0.95rem; font-weight: 700; color: var(--a-text); }
.adm-card__body { padding: 18px; }

/* ===== PAGE HEADER ===== */
.page-header {
    display: flex; align-items: flex-start; justify-content: space-between;
    margin-bottom: 18px; gap: 14px; flex-wrap: wrap;
}
.page-header__title {
    font-size: 1.4rem; font-weight: 800; margin: 0 0 4px;
    color: var(--a-text); letter-spacing: -0.01em;
}
.page-header__sub { font-size: 0.85rem; color: var(--a-muted); margin: 0; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 9px 16px;
    border: 1px solid transparent;
    border-radius: var(--a-radius-sm);
    background: var(--a-card-2);
    color: var(--a-text);
    font-family: inherit; font-size: 0.85rem; font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--a-transition);
}
.btn:hover { background: var(--a-border-2); }
.btn-sm { padding: 6px 12px; font-size: 0.78rem; }
.btn-lg { padding: 11px 22px; font-size: 0.95rem; }
.btn-primary {
    background: linear-gradient(135deg, var(--a-primary), var(--a-primary-2));
    color: #0B1220;
    font-weight: 700;
}
.btn-primary:hover { filter: brightness(1.05); color: #0B1220; }
.btn-secondary { background: var(--a-card-2); }
.btn-danger { background: var(--a-danger); color: #fff; }
.btn-danger:hover { filter: brightness(1.1); color: #fff; }

/* ===== FORMS ===== */
input[type="text"], input[type="email"], input[type="password"],
input[type="tel"], input[type="number"], input[type="date"], input[type="time"],
input[type="search"], select, textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--a-border-2);
    border-radius: var(--a-radius-sm);
    background: var(--a-card-2);
    color: var(--a-text);
    font-family: inherit;
    font-size: 0.9rem;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--a-primary);
    box-shadow: 0 0 0 3px rgba(34,211,238,0.15);
}
input::placeholder, textarea::placeholder { color: var(--a-muted-2); }
select option { background: var(--a-card); color: var(--a-text); }
label { font-size: 0.78rem; color: var(--a-muted); font-weight: 600; display: block; margin-bottom: 4px; }

/* ===== TABLE ===== */
.adm-table { width: 100%; border-collapse: collapse; }
.adm-table th {
    background: var(--a-card-2);
    color: var(--a-muted);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 700;
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--a-border);
}
.adm-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--a-border);
    font-size: 0.875rem;
}
.adm-table tbody tr:hover { background: rgba(255,255,255,0.02); }

/* ===== FLASH MESSAGES ===== */
.flash {
    padding: 12px 16px;
    border-radius: var(--a-radius-sm);
    margin-bottom: 14px;
    font-size: 0.88rem;
    border-left: 3px solid;
}
.flash--success { background: rgba(22,163,74,0.12); border-left-color: var(--a-success); color: #86efac; }
.flash--error   { background: rgba(220,38,38,0.12); border-left-color: var(--a-danger);  color: #fca5a5; }
.flash--info    { background: rgba(34,211,238,0.12); border-left-color: var(--a-primary); color: var(--a-primary-2); }

/* ===== LOGIN ===== */
.login-body {
    background: linear-gradient(135deg, #0B1220 0%, #111827 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-wrap { width: 100%; max-width: 380px; }
.login-card {
    background: var(--a-card);
    border: 1px solid var(--a-border);
    border-radius: 14px;
    padding: 32px 28px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}
.login-brand { text-align: center; margin-bottom: 24px; }
.login-logo {
    font-size: 1.75rem; font-weight: 800; letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--a-primary), var(--a-primary-2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.login-sub {
    font-size: 0.72rem; color: var(--a-muted-2);
    text-transform: uppercase; letter-spacing: 0.1em; margin-top: 4px;
}
.login-error {
    background: rgba(220,38,38,0.12);
    border: 1px solid rgba(220,38,38,0.3);
    color: #fca5a5;
    padding: 10px 14px;
    border-radius: var(--a-radius-sm);
    font-size: 0.85rem;
    margin-bottom: 14px;
}
.login-label { display: block; font-size: 0.75rem; color: var(--a-muted); margin-bottom: 4px; font-weight: 600; }
.login-input {
    width: 100%; padding: 10px 14px;
    background: var(--a-card-2);
    border: 1px solid var(--a-border-2);
    border-radius: var(--a-radius-sm);
    color: var(--a-text); font-family: inherit; font-size: 0.95rem;
}
.login-input:focus { outline: none; border-color: var(--a-primary); }
.login-btn {
    width: 100%; padding: 12px;
    margin-top: 18px;
    background: linear-gradient(135deg, var(--a-primary), var(--a-primary-2));
    color: #0B1220;
    border: none;
    border-radius: var(--a-radius-sm);
    font-family: inherit; font-size: 0.95rem; font-weight: 700;
    cursor: pointer;
}
.login-btn:hover { filter: brightness(1.05); }
.login-foot {
    text-align: center; margin-top: 18px; font-size: 0.8rem;
    color: var(--a-muted);
}
.login-foot a { color: var(--a-primary-2); }
.login-sep { margin: 0 8px; color: var(--a-muted-2); }
.login-back { text-align: center; margin-top: 18px; font-size: 0.78rem; }
.login-back a { color: var(--a-muted-2); }
.login-back a:hover { color: var(--a-primary); }

/* ===== MOBILE ===== */
@media (max-width: 900px) {
    .adm-sidebar { transform: translateX(-100%); transition: transform 0.2s; }
    .adm-sidebar.open { transform: translateX(0); }
    .adm-main { margin-left: 0; }
    .adm-topbar { padding: 0 16px; }
    .adm-content { padding: 18px 14px; }
}