/* =====================================================================
   Login Administrativo — Pontual Petróleo (admin.php)
   Tela sempre na identidade da marca: azul (#18216e/#18216e) — nova-interface.
   ===================================================================== */

:root {
    --bg-grad-a: #0f172a;
    --bg-grad-b: #0f172a;
    --bg-card: #1e293b;
    --bg-input: rgba(255, 255, 255, 0.04);
    --border: rgba(24, 33, 110, 0.18);
    --text-head: #e2e8f0;
    --text-main: #cbd5e1;
    --text-muted: #94a3b8;
    --primary: #18216e;
    --primary-hover: #3f52b6;
    --error: #ff6b74;
    --radius: 22px;
    --shadow: 0 28px 72px rgba(0, 0, 0, 0.55);
}

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

body {
    min-height: 100vh;
    font-family: system-ui, -apple-system, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(24, 33, 110, 0.14), transparent 34%),
        radial-gradient(circle at bottom right, rgba(24, 33, 110, 0.06), transparent 30%),
        linear-gradient(180deg, var(--bg-grad-a) 0%, var(--bg-grad-b) 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
    transition: background-color 0.3s ease;
}

.login-container {
    width: min(460px, 100%);
}

/* Barra superior: link de retorno ao canal */
.login-topbar {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    margin-bottom: 18px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg-card) 70%, transparent);
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.back-link:hover {
    color: var(--primary);
    border-color: color-mix(in srgb, var(--primary) 45%, transparent);
    transform: translateX(-2px);
}

.back-link svg { flex-shrink: 0; }

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 42px 34px;
    box-shadow: var(--shadow);
}

.login-header {
    margin-bottom: 32px;
    text-align: center;
}

.logo {
    height: 56px;
    margin: 0 auto 18px;
    width: auto;
}
.logo-dark-only { display: none; }
.logo-light-only { display: block; }
body.dark-theme .logo-light-only { display: none; }
body.dark-theme .logo-dark-only { display: block; }

h1 {
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--text-head);
}

.login-header p {
    color: var(--text-muted);
    margin-top: 10px;
    max-width: 310px;
    margin-left: auto;
    margin-right: auto;
}

.erro-box {
    background: color-mix(in srgb, var(--error) 12%, transparent);
    border-left: 4px solid var(--error);
    color: var(--error);
    padding: 14px 16px;
    border-radius: 14px;
    margin-bottom: 24px;
    display: flex;
    gap: 12px;
    align-items: center;
}

.login-form {
    display: grid;
    gap: 18px;
}

.input-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-head);
    margin-bottom: 8px;
}

input {
    width: 100%;
    border-radius: 14px;
    border: 1px solid var(--border);
    padding: 15px 18px;
    background: var(--bg-input);
    color: var(--text-head);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

input::placeholder { color: var(--text-muted); }

input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 5px color-mix(in srgb, var(--primary) 16%, transparent);
}

.submit-btn {
    width: 100%;
    padding: 16px;
    border-radius: 14px;
    border: 1px solid #141b57;
    /* Dourado metálico */
    background: #18216e;
    color: #ffffff;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.2px;
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
}

.submit-btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.05);
    box-shadow: 0 14px 28px rgba(24, 33, 110, 0.32);
}

/* Opções do login: permanecer conectado + redefinir senha */
.login-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 0.88rem;
}
.remember-me {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-main);
    cursor: pointer;
    user-select: none;
}
.remember-me input { width: 16px; height: 16px; accent-color: var(--primary); cursor: pointer; }
.link-reset { color: var(--primary); text-decoration: none; font-weight: 600; }
.link-reset:hover { text-decoration: underline; }

.login-links { text-align: center; margin-top: 16px; font-size: 0.9rem; }
.login-links a { color: var(--primary); text-decoration: none; font-weight: 600; }
.login-links a:hover { text-decoration: underline; }
.login-msg { color: var(--text-main); text-align: center; line-height: 1.6; margin: 4px 0; }

.ok-box {
    background: color-mix(in srgb, #15803d 16%, transparent);
    border-left: 4px solid #22c55e;
    color: #8ff0c8;
    padding: 14px 16px;
    border-radius: 14px;
    margin-bottom: 24px;
    display: flex;
    gap: 12px;
    align-items: center;
}

.login-footer {
    margin-top: 30px;
    color: var(--text-muted);
    text-align: center;
    font-size: 0.85rem;
}

.login-footer .footer-logo {
    height: 50px;
    width: auto;
    margin: 0 auto 12px;
    display: block;
}

.login-footer .powered-by {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 1rem;
    margin-bottom: 0.9rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.03);
}
.login-footer .powered-label {
    font-size: 0.68rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
}
.login-footer .powered-names {
    font-weight: 700;
    color: var(--primary);
}
.login-footer p { margin: 0; }

@media (max-width: 520px) {
    .login-card { padding: 34px 22px; }
    .back-link { padding: 10px 12px; }
    .back-link .back-text { display: none; }  /* no mobile mostra só a seta */
}