:root {
    --azul:        #153153;
    --azul-escuro: #0d2039;
    --azul-medio:  #1e4472;
    --claro:       #eff0ef;
    --escuro:      #404742;
    --branco:      #ffffff;
    --sombra:      rgba(0,0,0,0.35);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    min-height: 100vh;
    max-height: 100vh;
    background-color: var(--azul);
    background-image: url(../images/batop.png);
    background-size: cover;
    background-position: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: 'Poppins', sans-serif;
    padding: 20px;
}

/* ── Overlay escuro sobre o fundo ── */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, rgba(13,32,57,0.72) 0%, rgba(21,49,83,0.60) 100%);
    z-index: 0;
}

/* ── Card principal ── */
.auth-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 600px;
    height: 100vh;
}

.auth-card {
    background: var(--branco);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px var(--sombra);
    animation: fadeUp 0.5s ease both 0.1s;
}

.auth-panels {
    overflow: hidden;
    position: relative;
    width: 100%;
}

.auth-slider {
    width: 100%;
}

.auth-panel {
    display: none;
    padding: 28px 32px 32px;
    animation: authFadeIn 0.3s ease;
}

.auth-panel.active {
    display: block;
}

@keyframes authFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Abas ── */
.auth-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--claro);
}

.auth-tab-btn {
    padding: 14px;
    border: none;
    background: transparent;
    font-family: 'Poppins', sans-serif;
    font-size: 0.88rem;
    font-weight: 500;
    color: #888;
    cursor: pointer;
    transition: all 0.25s ease;
    letter-spacing: 0.03em;
    position: relative;
}

.auth-tab-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20%;
    width: 60%;
    height: 2.5px;
    background: var(--azul);
    border-radius: 2px;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.auth-tab-btn.active {
    color: var(--azul);
    font-weight: 600;
    background: var(--branco);
}

.auth-tab-btn.active::after {
    transform: scaleX(1);
}

/* ── Painel de conteúdo com slide ── */
.auth-panels {
    overflow: hidden;
    position: relative;
}

.auth-slider {
    display: flex;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

.auth-panel {
    min-width: 100%;
    padding: 28px 32px 32px;
}

/* ── Títulos internos ── */
.auth-panel-title {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--azul);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.auth-panel-sub {
    font-size: 0.80rem;
    color: #888;
    margin-bottom: 22px;
}

.auth-panel-sub strong {
    color: var(--azul);
}

/* ── Formulários ── */
.auth-field {
    margin-bottom: 14px;
    position: relative;
}

.auth-field .field-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #bbb;
    font-size: 0.85rem;
    pointer-events: none;
    transition: color 0.2s;
}

.auth-input {
    width: 100%;
    border: 1.5px solid #e5e9ef;
    border-radius: 8px;
    padding: 10px 38px 10px 36px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.88rem;
    color: var(--azul);
    background: #fafbfc;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.auth-input:focus {
    border-color: var(--azul);
    box-shadow: 0 0 0 3px rgba(21,49,83,0.10);
    background: #fff;
}

.auth-input:focus + .field-icon,
.auth-field:focus-within .field-icon {
    color: var(--azul);
}

.auth-toggle-senha {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #bbb;
    font-size: 0.85rem;
    transition: color 0.2s;
    background: none;
    border: none;
    padding: 0;
}

.auth-toggle-senha:hover { color: var(--azul); }

.auth-field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.auth-field-erro {
    font-size: 0.78rem;
    color: #e74c3c;
    margin-top: 4px;
    display: block;
}

/* ── Botão principal ── */
.auth-btn {
    width: 100%;
    padding: 12px;
    background: var(--azul);
    color: var(--branco);
    border: none;
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    letter-spacing: 0.02em;
    margin-top: 6px;
}

.auth-btn:hover:not(:disabled) {
    background: var(--azul-medio);
    transform: translateY(-1px);
}

.auth-btn:disabled { opacity: 0.65; cursor: not-allowed; }

/* ── Divisor ── */
.auth-divider {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 18px 0;
    color: #ccc;
    font-size: 0.78rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #eee;
}

/* ── Botão Google ── */
.auth-btn-google {
    width: 100%;
    padding: 10px;
    background: #fff;
    color: #444;
    border: 1.5px solid #e5e9ef;
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.1s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.auth-btn-google:hover {
    border-color: #4285F4;
    box-shadow: 0 2px 8px rgba(66,133,244,0.15);
    transform: translateY(-1px);
}

.auth-btn-google svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* ── Links rodapé do painel ── */
.auth-footer-links {
    text-align: center;
    margin-top: 18px;
    font-size: 0.80rem;
    color: #888;
}

.auth-footer-links a {
    color: var(--azul);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer-links a:hover { text-decoration: underline; }

.auth-footer-links .sep {
    margin: 0 8px;
    color: #ddd;
}

/* ── Termos ── */
.auth-termos {
    font-size: 0.72rem;
    color: #aaa;
    text-align: center;
    margin-top: 14px;
    line-height: 1.5;
}

.auth-termos a { color: var(--azul); }

/* ── Alert de erro ── */
.auth-alert {
    background: #fde8e8;
    border: 1px solid #f5c6c6;
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 0.82rem;
    color: #c0392b;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ── Loader ── */
.auth-loader {
    border: 2px solid rgba(255,255,255,0.3);
    border-top: 2px solid #fff;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    animation: spin 0.7s linear infinite;
    display: inline-block;
    vertical-align: middle;
}

/* ── Animações ── */
@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-16px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ── Mobile ── */
@media (max-width: 480px) {
    .auth-panel { padding: 22px 20px 26px; }
    .auth-field-row { grid-template-columns: 1fr; gap: 0; }
}